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-rw-r--r--qemu/hw/vfio/Makefile.objs7
-rw-r--r--qemu/hw/vfio/amd-xgbe.c56
-rw-r--r--qemu/hw/vfio/calxeda-xgmac.c56
-rw-r--r--qemu/hw/vfio/common.c1192
-rw-r--r--qemu/hw/vfio/pci-quirks.c1205
-rw-r--r--qemu/hw/vfio/pci.c2734
-rw-r--r--qemu/hw/vfio/pci.h162
-rw-r--r--qemu/hw/vfio/platform.c705
8 files changed, 0 insertions, 6117 deletions
diff --git a/qemu/hw/vfio/Makefile.objs b/qemu/hw/vfio/Makefile.objs
deleted file mode 100644
index ceddbb8f9..000000000
--- a/qemu/hw/vfio/Makefile.objs
+++ /dev/null
@@ -1,7 +0,0 @@
-ifeq ($(CONFIG_LINUX), y)
-obj-$(CONFIG_SOFTMMU) += common.o
-obj-$(CONFIG_PCI) += pci.o pci-quirks.o
-obj-$(CONFIG_SOFTMMU) += platform.o
-obj-$(CONFIG_SOFTMMU) += calxeda-xgmac.o
-obj-$(CONFIG_SOFTMMU) += amd-xgbe.o
-endif
diff --git a/qemu/hw/vfio/amd-xgbe.c b/qemu/hw/vfio/amd-xgbe.c
deleted file mode 100644
index 2c60310cf..000000000
--- a/qemu/hw/vfio/amd-xgbe.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * AMD XGBE VFIO device
- *
- * Copyright Linaro Limited, 2015
- *
- * Authors:
- * Eric Auger <eric.auger@linaro.org>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include "hw/vfio/vfio-amd-xgbe.h"
-
-static void amd_xgbe_realize(DeviceState *dev, Error **errp)
-{
- VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(dev);
- VFIOAmdXgbeDeviceClass *k = VFIO_AMD_XGBE_DEVICE_GET_CLASS(dev);
-
- vdev->compat = g_strdup("amd,xgbe-seattle-v1a");
-
- k->parent_realize(dev, errp);
-}
-
-static const VMStateDescription vfio_platform_amd_xgbe_vmstate = {
- .name = TYPE_VFIO_AMD_XGBE,
- .unmigratable = 1,
-};
-
-static void vfio_amd_xgbe_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- VFIOAmdXgbeDeviceClass *vcxc =
- VFIO_AMD_XGBE_DEVICE_CLASS(klass);
- vcxc->parent_realize = dc->realize;
- dc->realize = amd_xgbe_realize;
- dc->desc = "VFIO AMD XGBE";
- dc->vmsd = &vfio_platform_amd_xgbe_vmstate;
-}
-
-static const TypeInfo vfio_amd_xgbe_dev_info = {
- .name = TYPE_VFIO_AMD_XGBE,
- .parent = TYPE_VFIO_PLATFORM,
- .instance_size = sizeof(VFIOAmdXgbeDevice),
- .class_init = vfio_amd_xgbe_class_init,
- .class_size = sizeof(VFIOAmdXgbeDeviceClass),
-};
-
-static void register_amd_xgbe_dev_type(void)
-{
- type_register_static(&vfio_amd_xgbe_dev_info);
-}
-
-type_init(register_amd_xgbe_dev_type)
diff --git a/qemu/hw/vfio/calxeda-xgmac.c b/qemu/hw/vfio/calxeda-xgmac.c
deleted file mode 100644
index bb15d588e..000000000
--- a/qemu/hw/vfio/calxeda-xgmac.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * calxeda xgmac VFIO device
- *
- * Copyright Linaro Limited, 2014
- *
- * Authors:
- * Eric Auger <eric.auger@linaro.org>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include "hw/vfio/vfio-calxeda-xgmac.h"
-
-static void calxeda_xgmac_realize(DeviceState *dev, Error **errp)
-{
- VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(dev);
- VFIOCalxedaXgmacDeviceClass *k = VFIO_CALXEDA_XGMAC_DEVICE_GET_CLASS(dev);
-
- vdev->compat = g_strdup("calxeda,hb-xgmac");
-
- k->parent_realize(dev, errp);
-}
-
-static const VMStateDescription vfio_platform_calxeda_xgmac_vmstate = {
- .name = TYPE_VFIO_CALXEDA_XGMAC,
- .unmigratable = 1,
-};
-
-static void vfio_calxeda_xgmac_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- VFIOCalxedaXgmacDeviceClass *vcxc =
- VFIO_CALXEDA_XGMAC_DEVICE_CLASS(klass);
- vcxc->parent_realize = dc->realize;
- dc->realize = calxeda_xgmac_realize;
- dc->desc = "VFIO Calxeda XGMAC";
- dc->vmsd = &vfio_platform_calxeda_xgmac_vmstate;
-}
-
-static const TypeInfo vfio_calxeda_xgmac_dev_info = {
- .name = TYPE_VFIO_CALXEDA_XGMAC,
- .parent = TYPE_VFIO_PLATFORM,
- .instance_size = sizeof(VFIOCalxedaXgmacDevice),
- .class_init = vfio_calxeda_xgmac_class_init,
- .class_size = sizeof(VFIOCalxedaXgmacDeviceClass),
-};
-
-static void register_calxeda_xgmac_dev_type(void)
-{
- type_register_static(&vfio_calxeda_xgmac_dev_info);
-}
-
-type_init(register_calxeda_xgmac_dev_type)
diff --git a/qemu/hw/vfio/common.c b/qemu/hw/vfio/common.c
deleted file mode 100644
index f27db36fb..000000000
--- a/qemu/hw/vfio/common.c
+++ /dev/null
@@ -1,1192 +0,0 @@
-/*
- * generic functions used by VFIO devices
- *
- * Copyright Red Hat, Inc. 2012
- *
- * Authors:
- * Alex Williamson <alex.williamson@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Based on qemu-kvm device-assignment:
- * Adapted for KVM by Qumranet.
- * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
- * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
- * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
- * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
- * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
- */
-
-#include "qemu/osdep.h"
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <linux/vfio.h>
-
-#include "hw/vfio/vfio-common.h"
-#include "hw/vfio/vfio.h"
-#include "exec/address-spaces.h"
-#include "exec/memory.h"
-#include "hw/hw.h"
-#include "qemu/error-report.h"
-#include "sysemu/kvm.h"
-#include "trace.h"
-
-struct vfio_group_head vfio_group_list =
- QLIST_HEAD_INITIALIZER(vfio_group_list);
-struct vfio_as_head vfio_address_spaces =
- QLIST_HEAD_INITIALIZER(vfio_address_spaces);
-
-#ifdef CONFIG_KVM
-/*
- * We have a single VFIO pseudo device per KVM VM. Once created it lives
- * for the life of the VM. Closing the file descriptor only drops our
- * reference to it and the device's reference to kvm. Therefore once
- * initialized, this file descriptor is only released on QEMU exit and
- * we'll re-use it should another vfio device be attached before then.
- */
-static int vfio_kvm_device_fd = -1;
-#endif
-
-/*
- * Common VFIO interrupt disable
- */
-void vfio_disable_irqindex(VFIODevice *vbasedev, int index)
-{
- struct vfio_irq_set irq_set = {
- .argsz = sizeof(irq_set),
- .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER,
- .index = index,
- .start = 0,
- .count = 0,
- };
-
- ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
-}
-
-void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index)
-{
- struct vfio_irq_set irq_set = {
- .argsz = sizeof(irq_set),
- .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
- .index = index,
- .start = 0,
- .count = 1,
- };
-
- ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
-}
-
-void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index)
-{
- struct vfio_irq_set irq_set = {
- .argsz = sizeof(irq_set),
- .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK,
- .index = index,
- .start = 0,
- .count = 1,
- };
-
- ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
-}
-
-/*
- * IO Port/MMIO - Beware of the endians, VFIO is always little endian
- */
-void vfio_region_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIORegion *region = opaque;
- VFIODevice *vbasedev = region->vbasedev;
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
-
- switch (size) {
- case 1:
- buf.byte = data;
- break;
- case 2:
- buf.word = cpu_to_le16(data);
- break;
- case 4:
- buf.dword = cpu_to_le32(data);
- break;
- default:
- hw_error("vfio: unsupported write size, %d bytes", size);
- break;
- }
-
- if (pwrite(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) {
- error_report("%s(%s:region%d+0x%"HWADDR_PRIx", 0x%"PRIx64
- ",%d) failed: %m",
- __func__, vbasedev->name, region->nr,
- addr, data, size);
- }
-
- trace_vfio_region_write(vbasedev->name, region->nr, addr, data, size);
-
- /*
- * A read or write to a BAR always signals an INTx EOI. This will
- * do nothing if not pending (including not in INTx mode). We assume
- * that a BAR access is in response to an interrupt and that BAR
- * accesses will service the interrupt. Unfortunately, we don't know
- * which access will service the interrupt, so we're potentially
- * getting quite a few host interrupts per guest interrupt.
- */
- vbasedev->ops->vfio_eoi(vbasedev);
-}
-
-uint64_t vfio_region_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIORegion *region = opaque;
- VFIODevice *vbasedev = region->vbasedev;
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- uint64_t data = 0;
-
- if (pread(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) {
- error_report("%s(%s:region%d+0x%"HWADDR_PRIx", %d) failed: %m",
- __func__, vbasedev->name, region->nr,
- addr, size);
- return (uint64_t)-1;
- }
- switch (size) {
- case 1:
- data = buf.byte;
- break;
- case 2:
- data = le16_to_cpu(buf.word);
- break;
- case 4:
- data = le32_to_cpu(buf.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes", size);
- break;
- }
-
- trace_vfio_region_read(vbasedev->name, region->nr, addr, size, data);
-
- /* Same as write above */
- vbasedev->ops->vfio_eoi(vbasedev);
-
- return data;
-}
-
-const MemoryRegionOps vfio_region_ops = {
- .read = vfio_region_read,
- .write = vfio_region_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-/*
- * DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
- */
-static int vfio_dma_unmap(VFIOContainer *container,
- hwaddr iova, ram_addr_t size)
-{
- struct vfio_iommu_type1_dma_unmap unmap = {
- .argsz = sizeof(unmap),
- .flags = 0,
- .iova = iova,
- .size = size,
- };
-
- if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
- error_report("VFIO_UNMAP_DMA: %d", -errno);
- return -errno;
- }
-
- return 0;
-}
-
-static int vfio_dma_map(VFIOContainer *container, hwaddr iova,
- ram_addr_t size, void *vaddr, bool readonly)
-{
- struct vfio_iommu_type1_dma_map map = {
- .argsz = sizeof(map),
- .flags = VFIO_DMA_MAP_FLAG_READ,
- .vaddr = (__u64)(uintptr_t)vaddr,
- .iova = iova,
- .size = size,
- };
-
- if (!readonly) {
- map.flags |= VFIO_DMA_MAP_FLAG_WRITE;
- }
-
- /*
- * Try the mapping, if it fails with EBUSY, unmap the region and try
- * again. This shouldn't be necessary, but we sometimes see it in
- * the VGA ROM space.
- */
- if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 ||
- (errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
- ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
- return 0;
- }
-
- error_report("VFIO_MAP_DMA: %d", -errno);
- return -errno;
-}
-
-static bool vfio_listener_skipped_section(MemoryRegionSection *section)
-{
- return (!memory_region_is_ram(section->mr) &&
- !memory_region_is_iommu(section->mr)) ||
- /*
- * Sizing an enabled 64-bit BAR can cause spurious mappings to
- * addresses in the upper part of the 64-bit address space. These
- * are never accessed by the CPU and beyond the address width of
- * some IOMMU hardware. TODO: VFIO should tell us the IOMMU width.
- */
- section->offset_within_address_space & (1ULL << 63);
-}
-
-static void vfio_iommu_map_notify(Notifier *n, void *data)
-{
- VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n);
- VFIOContainer *container = giommu->container;
- IOMMUTLBEntry *iotlb = data;
- MemoryRegion *mr;
- hwaddr xlat;
- hwaddr len = iotlb->addr_mask + 1;
- void *vaddr;
- int ret;
-
- trace_vfio_iommu_map_notify(iotlb->iova,
- iotlb->iova + iotlb->addr_mask);
-
- /*
- * The IOMMU TLB entry we have just covers translation through
- * this IOMMU to its immediate target. We need to translate
- * it the rest of the way through to memory.
- */
- rcu_read_lock();
- mr = address_space_translate(&address_space_memory,
- iotlb->translated_addr,
- &xlat, &len, iotlb->perm & IOMMU_WO);
- if (!memory_region_is_ram(mr)) {
- error_report("iommu map to non memory area %"HWADDR_PRIx"",
- xlat);
- goto out;
- }
- /*
- * Translation truncates length to the IOMMU page size,
- * check that it did not truncate too much.
- */
- if (len & iotlb->addr_mask) {
- error_report("iommu has granularity incompatible with target AS");
- goto out;
- }
-
- if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) {
- vaddr = memory_region_get_ram_ptr(mr) + xlat;
- ret = vfio_dma_map(container, iotlb->iova,
- iotlb->addr_mask + 1, vaddr,
- !(iotlb->perm & IOMMU_WO) || mr->readonly);
- if (ret) {
- error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx", %p) = %d (%m)",
- container, iotlb->iova,
- iotlb->addr_mask + 1, vaddr, ret);
- }
- } else {
- ret = vfio_dma_unmap(container, iotlb->iova, iotlb->addr_mask + 1);
- if (ret) {
- error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx") = %d (%m)",
- container, iotlb->iova,
- iotlb->addr_mask + 1, ret);
- }
- }
-out:
- rcu_read_unlock();
-}
-
-static hwaddr vfio_container_granularity(VFIOContainer *container)
-{
- return (hwaddr)1 << ctz64(container->iova_pgsizes);
-}
-
-static void vfio_listener_region_add(MemoryListener *listener,
- MemoryRegionSection *section)
-{
- VFIOContainer *container = container_of(listener, VFIOContainer, listener);
- hwaddr iova, end;
- Int128 llend, llsize;
- void *vaddr;
- int ret;
-
- if (vfio_listener_skipped_section(section)) {
- trace_vfio_listener_region_add_skip(
- section->offset_within_address_space,
- section->offset_within_address_space +
- int128_get64(int128_sub(section->size, int128_one())));
- return;
- }
-
- if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
- (section->offset_within_region & ~TARGET_PAGE_MASK))) {
- error_report("%s received unaligned region", __func__);
- return;
- }
-
- iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
- llend = int128_make64(section->offset_within_address_space);
- llend = int128_add(llend, section->size);
- llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK));
-
- if (int128_ge(int128_make64(iova), llend)) {
- return;
- }
- end = int128_get64(int128_sub(llend, int128_one()));
-
- if ((iova < container->min_iova) || (end > container->max_iova)) {
- error_report("vfio: IOMMU container %p can't map guest IOVA region"
- " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx,
- container, iova, end);
- ret = -EFAULT;
- goto fail;
- }
-
- memory_region_ref(section->mr);
-
- if (memory_region_is_iommu(section->mr)) {
- VFIOGuestIOMMU *giommu;
-
- trace_vfio_listener_region_add_iommu(iova, end);
- /*
- * FIXME: We should do some checking to see if the
- * capabilities of the host VFIO IOMMU are adequate to model
- * the guest IOMMU
- *
- * FIXME: For VFIO iommu types which have KVM acceleration to
- * avoid bouncing all map/unmaps through qemu this way, this
- * would be the right place to wire that up (tell the KVM
- * device emulation the VFIO iommu handles to use).
- */
- giommu = g_malloc0(sizeof(*giommu));
- giommu->iommu = section->mr;
- giommu->container = container;
- giommu->n.notify = vfio_iommu_map_notify;
- QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next);
-
- memory_region_register_iommu_notifier(giommu->iommu, &giommu->n);
- memory_region_iommu_replay(giommu->iommu, &giommu->n,
- vfio_container_granularity(container),
- false);
-
- return;
- }
-
- /* Here we assume that memory_region_is_ram(section->mr)==true */
-
- vaddr = memory_region_get_ram_ptr(section->mr) +
- section->offset_within_region +
- (iova - section->offset_within_address_space);
-
- trace_vfio_listener_region_add_ram(iova, end, vaddr);
-
- llsize = int128_sub(llend, int128_make64(iova));
-
- ret = vfio_dma_map(container, iova, int128_get64(llsize),
- vaddr, section->readonly);
- if (ret) {
- error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx", %p) = %d (%m)",
- container, iova, int128_get64(llsize), vaddr, ret);
- goto fail;
- }
-
- return;
-
-fail:
- /*
- * On the initfn path, store the first error in the container so we
- * can gracefully fail. Runtime, there's not much we can do other
- * than throw a hardware error.
- */
- if (!container->initialized) {
- if (!container->error) {
- container->error = ret;
- }
- } else {
- hw_error("vfio: DMA mapping failed, unable to continue");
- }
-}
-
-static void vfio_listener_region_del(MemoryListener *listener,
- MemoryRegionSection *section)
-{
- VFIOContainer *container = container_of(listener, VFIOContainer, listener);
- hwaddr iova, end;
- int ret;
-
- if (vfio_listener_skipped_section(section)) {
- trace_vfio_listener_region_del_skip(
- section->offset_within_address_space,
- section->offset_within_address_space +
- int128_get64(int128_sub(section->size, int128_one())));
- return;
- }
-
- if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
- (section->offset_within_region & ~TARGET_PAGE_MASK))) {
- error_report("%s received unaligned region", __func__);
- return;
- }
-
- if (memory_region_is_iommu(section->mr)) {
- VFIOGuestIOMMU *giommu;
-
- QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) {
- if (giommu->iommu == section->mr) {
- memory_region_unregister_iommu_notifier(&giommu->n);
- QLIST_REMOVE(giommu, giommu_next);
- g_free(giommu);
- break;
- }
- }
-
- /*
- * FIXME: We assume the one big unmap below is adequate to
- * remove any individual page mappings in the IOMMU which
- * might have been copied into VFIO. This works for a page table
- * based IOMMU where a big unmap flattens a large range of IO-PTEs.
- * That may not be true for all IOMMU types.
- */
- }
-
- iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
- end = (section->offset_within_address_space + int128_get64(section->size)) &
- TARGET_PAGE_MASK;
-
- if (iova >= end) {
- return;
- }
-
- trace_vfio_listener_region_del(iova, end - 1);
-
- ret = vfio_dma_unmap(container, iova, end - iova);
- memory_region_unref(section->mr);
- if (ret) {
- error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx") = %d (%m)",
- container, iova, end - iova, ret);
- }
-}
-
-static const MemoryListener vfio_memory_listener = {
- .region_add = vfio_listener_region_add,
- .region_del = vfio_listener_region_del,
-};
-
-static void vfio_listener_release(VFIOContainer *container)
-{
- memory_listener_unregister(&container->listener);
-}
-
-int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region,
- int index, const char *name)
-{
- struct vfio_region_info *info;
- int ret;
-
- ret = vfio_get_region_info(vbasedev, index, &info);
- if (ret) {
- return ret;
- }
-
- region->vbasedev = vbasedev;
- region->flags = info->flags;
- region->size = info->size;
- region->fd_offset = info->offset;
- region->nr = index;
-
- if (region->size) {
- region->mem = g_new0(MemoryRegion, 1);
- memory_region_init_io(region->mem, obj, &vfio_region_ops,
- region, name, region->size);
-
- if (!vbasedev->no_mmap &&
- region->flags & VFIO_REGION_INFO_FLAG_MMAP &&
- !(region->size & ~qemu_real_host_page_mask)) {
-
- region->nr_mmaps = 1;
- region->mmaps = g_new0(VFIOMmap, region->nr_mmaps);
-
- region->mmaps[0].offset = 0;
- region->mmaps[0].size = region->size;
- }
- }
-
- g_free(info);
-
- trace_vfio_region_setup(vbasedev->name, index, name,
- region->flags, region->fd_offset, region->size);
- return 0;
-}
-
-int vfio_region_mmap(VFIORegion *region)
-{
- int i, prot = 0;
- char *name;
-
- if (!region->mem) {
- return 0;
- }
-
- prot |= region->flags & VFIO_REGION_INFO_FLAG_READ ? PROT_READ : 0;
- prot |= region->flags & VFIO_REGION_INFO_FLAG_WRITE ? PROT_WRITE : 0;
-
- for (i = 0; i < region->nr_mmaps; i++) {
- region->mmaps[i].mmap = mmap(NULL, region->mmaps[i].size, prot,
- MAP_SHARED, region->vbasedev->fd,
- region->fd_offset +
- region->mmaps[i].offset);
- if (region->mmaps[i].mmap == MAP_FAILED) {
- int ret = -errno;
-
- trace_vfio_region_mmap_fault(memory_region_name(region->mem), i,
- region->fd_offset +
- region->mmaps[i].offset,
- region->fd_offset +
- region->mmaps[i].offset +
- region->mmaps[i].size - 1, ret);
-
- region->mmaps[i].mmap = NULL;
-
- for (i--; i >= 0; i--) {
- memory_region_del_subregion(region->mem, &region->mmaps[i].mem);
- munmap(region->mmaps[i].mmap, region->mmaps[i].size);
- object_unparent(OBJECT(&region->mmaps[i].mem));
- region->mmaps[i].mmap = NULL;
- }
-
- return ret;
- }
-
- name = g_strdup_printf("%s mmaps[%d]",
- memory_region_name(region->mem), i);
- memory_region_init_ram_ptr(&region->mmaps[i].mem,
- memory_region_owner(region->mem),
- name, region->mmaps[i].size,
- region->mmaps[i].mmap);
- g_free(name);
- memory_region_set_skip_dump(&region->mmaps[i].mem);
- memory_region_add_subregion(region->mem, region->mmaps[i].offset,
- &region->mmaps[i].mem);
-
- trace_vfio_region_mmap(memory_region_name(&region->mmaps[i].mem),
- region->mmaps[i].offset,
- region->mmaps[i].offset +
- region->mmaps[i].size - 1);
- }
-
- return 0;
-}
-
-void vfio_region_exit(VFIORegion *region)
-{
- int i;
-
- if (!region->mem) {
- return;
- }
-
- for (i = 0; i < region->nr_mmaps; i++) {
- if (region->mmaps[i].mmap) {
- memory_region_del_subregion(region->mem, &region->mmaps[i].mem);
- }
- }
-
- trace_vfio_region_exit(region->vbasedev->name, region->nr);
-}
-
-void vfio_region_finalize(VFIORegion *region)
-{
- int i;
-
- if (!region->mem) {
- return;
- }
-
- for (i = 0; i < region->nr_mmaps; i++) {
- if (region->mmaps[i].mmap) {
- munmap(region->mmaps[i].mmap, region->mmaps[i].size);
- object_unparent(OBJECT(&region->mmaps[i].mem));
- }
- }
-
- object_unparent(OBJECT(region->mem));
-
- g_free(region->mem);
- g_free(region->mmaps);
-
- trace_vfio_region_finalize(region->vbasedev->name, region->nr);
-}
-
-void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled)
-{
- int i;
-
- if (!region->mem) {
- return;
- }
-
- for (i = 0; i < region->nr_mmaps; i++) {
- if (region->mmaps[i].mmap) {
- memory_region_set_enabled(&region->mmaps[i].mem, enabled);
- }
- }
-
- trace_vfio_region_mmaps_set_enabled(memory_region_name(region->mem),
- enabled);
-}
-
-void vfio_reset_handler(void *opaque)
-{
- VFIOGroup *group;
- VFIODevice *vbasedev;
-
- QLIST_FOREACH(group, &vfio_group_list, next) {
- QLIST_FOREACH(vbasedev, &group->device_list, next) {
- vbasedev->ops->vfio_compute_needs_reset(vbasedev);
- }
- }
-
- QLIST_FOREACH(group, &vfio_group_list, next) {
- QLIST_FOREACH(vbasedev, &group->device_list, next) {
- if (vbasedev->needs_reset) {
- vbasedev->ops->vfio_hot_reset_multi(vbasedev);
- }
- }
- }
-}
-
-static void vfio_kvm_device_add_group(VFIOGroup *group)
-{
-#ifdef CONFIG_KVM
- struct kvm_device_attr attr = {
- .group = KVM_DEV_VFIO_GROUP,
- .attr = KVM_DEV_VFIO_GROUP_ADD,
- .addr = (uint64_t)(unsigned long)&group->fd,
- };
-
- if (!kvm_enabled()) {
- return;
- }
-
- if (vfio_kvm_device_fd < 0) {
- struct kvm_create_device cd = {
- .type = KVM_DEV_TYPE_VFIO,
- };
-
- if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) {
- error_report("Failed to create KVM VFIO device: %m");
- return;
- }
-
- vfio_kvm_device_fd = cd.fd;
- }
-
- if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
- error_report("Failed to add group %d to KVM VFIO device: %m",
- group->groupid);
- }
-#endif
-}
-
-static void vfio_kvm_device_del_group(VFIOGroup *group)
-{
-#ifdef CONFIG_KVM
- struct kvm_device_attr attr = {
- .group = KVM_DEV_VFIO_GROUP,
- .attr = KVM_DEV_VFIO_GROUP_DEL,
- .addr = (uint64_t)(unsigned long)&group->fd,
- };
-
- if (vfio_kvm_device_fd < 0) {
- return;
- }
-
- if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
- error_report("Failed to remove group %d from KVM VFIO device: %m",
- group->groupid);
- }
-#endif
-}
-
-static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as)
-{
- VFIOAddressSpace *space;
-
- QLIST_FOREACH(space, &vfio_address_spaces, list) {
- if (space->as == as) {
- return space;
- }
- }
-
- /* No suitable VFIOAddressSpace, create a new one */
- space = g_malloc0(sizeof(*space));
- space->as = as;
- QLIST_INIT(&space->containers);
-
- QLIST_INSERT_HEAD(&vfio_address_spaces, space, list);
-
- return space;
-}
-
-static void vfio_put_address_space(VFIOAddressSpace *space)
-{
- if (QLIST_EMPTY(&space->containers)) {
- QLIST_REMOVE(space, list);
- g_free(space);
- }
-}
-
-static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
-{
- VFIOContainer *container;
- int ret, fd;
- VFIOAddressSpace *space;
-
- space = vfio_get_address_space(as);
-
- QLIST_FOREACH(container, &space->containers, next) {
- if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
- group->container = container;
- QLIST_INSERT_HEAD(&container->group_list, group, container_next);
- return 0;
- }
- }
-
- fd = qemu_open("/dev/vfio/vfio", O_RDWR);
- if (fd < 0) {
- error_report("vfio: failed to open /dev/vfio/vfio: %m");
- ret = -errno;
- goto put_space_exit;
- }
-
- ret = ioctl(fd, VFIO_GET_API_VERSION);
- if (ret != VFIO_API_VERSION) {
- error_report("vfio: supported vfio version: %d, "
- "reported version: %d", VFIO_API_VERSION, ret);
- ret = -EINVAL;
- goto close_fd_exit;
- }
-
- container = g_malloc0(sizeof(*container));
- container->space = space;
- container->fd = fd;
- if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) ||
- ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)) {
- bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU);
- struct vfio_iommu_type1_info info;
-
- ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
- if (ret) {
- error_report("vfio: failed to set group container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- ret = ioctl(fd, VFIO_SET_IOMMU,
- v2 ? VFIO_TYPE1v2_IOMMU : VFIO_TYPE1_IOMMU);
- if (ret) {
- error_report("vfio: failed to set iommu for container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- /*
- * FIXME: This assumes that a Type1 IOMMU can map any 64-bit
- * IOVA whatsoever. That's not actually true, but the current
- * kernel interface doesn't tell us what it can map, and the
- * existing Type1 IOMMUs generally support any IOVA we're
- * going to actually try in practice.
- */
- container->min_iova = 0;
- container->max_iova = (hwaddr)-1;
-
- /* Assume just 4K IOVA page size */
- container->iova_pgsizes = 0x1000;
- info.argsz = sizeof(info);
- ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info);
- /* Ignore errors */
- if ((ret == 0) && (info.flags & VFIO_IOMMU_INFO_PGSIZES)) {
- container->iova_pgsizes = info.iova_pgsizes;
- }
- } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) {
- struct vfio_iommu_spapr_tce_info info;
-
- ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
- if (ret) {
- error_report("vfio: failed to set group container: %m");
- ret = -errno;
- goto free_container_exit;
- }
- ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_SPAPR_TCE_IOMMU);
- if (ret) {
- error_report("vfio: failed to set iommu for container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- /*
- * The host kernel code implementing VFIO_IOMMU_DISABLE is called
- * when container fd is closed so we do not call it explicitly
- * in this file.
- */
- ret = ioctl(fd, VFIO_IOMMU_ENABLE);
- if (ret) {
- error_report("vfio: failed to enable container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- /*
- * This only considers the host IOMMU's 32-bit window. At
- * some point we need to add support for the optional 64-bit
- * window and dynamic windows
- */
- info.argsz = sizeof(info);
- ret = ioctl(fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info);
- if (ret) {
- error_report("vfio: VFIO_IOMMU_SPAPR_TCE_GET_INFO failed: %m");
- ret = -errno;
- goto free_container_exit;
- }
- container->min_iova = info.dma32_window_start;
- container->max_iova = container->min_iova + info.dma32_window_size - 1;
-
- /* Assume just 4K IOVA pages for now */
- container->iova_pgsizes = 0x1000;
- } else {
- error_report("vfio: No available IOMMU models");
- ret = -EINVAL;
- goto free_container_exit;
- }
-
- container->listener = vfio_memory_listener;
-
- memory_listener_register(&container->listener, container->space->as);
-
- if (container->error) {
- ret = container->error;
- error_report("vfio: memory listener initialization failed for container");
- goto listener_release_exit;
- }
-
- container->initialized = true;
-
- QLIST_INIT(&container->group_list);
- QLIST_INSERT_HEAD(&space->containers, container, next);
-
- group->container = container;
- QLIST_INSERT_HEAD(&container->group_list, group, container_next);
-
- return 0;
-listener_release_exit:
- vfio_listener_release(container);
-
-free_container_exit:
- g_free(container);
-
-close_fd_exit:
- close(fd);
-
-put_space_exit:
- vfio_put_address_space(space);
-
- return ret;
-}
-
-static void vfio_disconnect_container(VFIOGroup *group)
-{
- VFIOContainer *container = group->container;
-
- if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
- error_report("vfio: error disconnecting group %d from container",
- group->groupid);
- }
-
- QLIST_REMOVE(group, container_next);
- group->container = NULL;
-
- if (QLIST_EMPTY(&container->group_list)) {
- VFIOAddressSpace *space = container->space;
- VFIOGuestIOMMU *giommu, *tmp;
-
- vfio_listener_release(container);
- QLIST_REMOVE(container, next);
-
- QLIST_FOREACH_SAFE(giommu, &container->giommu_list, giommu_next, tmp) {
- memory_region_unregister_iommu_notifier(&giommu->n);
- QLIST_REMOVE(giommu, giommu_next);
- g_free(giommu);
- }
-
- trace_vfio_disconnect_container(container->fd);
- close(container->fd);
- g_free(container);
-
- vfio_put_address_space(space);
- }
-}
-
-VFIOGroup *vfio_get_group(int groupid, AddressSpace *as)
-{
- VFIOGroup *group;
- char path[32];
- struct vfio_group_status status = { .argsz = sizeof(status) };
-
- QLIST_FOREACH(group, &vfio_group_list, next) {
- if (group->groupid == groupid) {
- /* Found it. Now is it already in the right context? */
- if (group->container->space->as == as) {
- return group;
- } else {
- error_report("vfio: group %d used in multiple address spaces",
- group->groupid);
- return NULL;
- }
- }
- }
-
- group = g_malloc0(sizeof(*group));
-
- snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
- group->fd = qemu_open(path, O_RDWR);
- if (group->fd < 0) {
- error_report("vfio: error opening %s: %m", path);
- goto free_group_exit;
- }
-
- if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
- error_report("vfio: error getting group status: %m");
- goto close_fd_exit;
- }
-
- if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
- error_report("vfio: error, group %d is not viable, please ensure "
- "all devices within the iommu_group are bound to their "
- "vfio bus driver.", groupid);
- goto close_fd_exit;
- }
-
- group->groupid = groupid;
- QLIST_INIT(&group->device_list);
-
- if (vfio_connect_container(group, as)) {
- error_report("vfio: failed to setup container for group %d", groupid);
- goto close_fd_exit;
- }
-
- if (QLIST_EMPTY(&vfio_group_list)) {
- qemu_register_reset(vfio_reset_handler, NULL);
- }
-
- QLIST_INSERT_HEAD(&vfio_group_list, group, next);
-
- vfio_kvm_device_add_group(group);
-
- return group;
-
-close_fd_exit:
- close(group->fd);
-
-free_group_exit:
- g_free(group);
-
- return NULL;
-}
-
-void vfio_put_group(VFIOGroup *group)
-{
- if (!group || !QLIST_EMPTY(&group->device_list)) {
- return;
- }
-
- vfio_kvm_device_del_group(group);
- vfio_disconnect_container(group);
- QLIST_REMOVE(group, next);
- trace_vfio_put_group(group->fd);
- close(group->fd);
- g_free(group);
-
- if (QLIST_EMPTY(&vfio_group_list)) {
- qemu_unregister_reset(vfio_reset_handler, NULL);
- }
-}
-
-int vfio_get_device(VFIOGroup *group, const char *name,
- VFIODevice *vbasedev)
-{
- struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
- int ret, fd;
-
- fd = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name);
- if (fd < 0) {
- error_report("vfio: error getting device %s from group %d: %m",
- name, group->groupid);
- error_printf("Verify all devices in group %d are bound to vfio-<bus> "
- "or pci-stub and not already in use\n", group->groupid);
- return fd;
- }
-
- ret = ioctl(fd, VFIO_DEVICE_GET_INFO, &dev_info);
- if (ret) {
- error_report("vfio: error getting device info: %m");
- close(fd);
- return ret;
- }
-
- vbasedev->fd = fd;
- vbasedev->group = group;
- QLIST_INSERT_HEAD(&group->device_list, vbasedev, next);
-
- vbasedev->num_irqs = dev_info.num_irqs;
- vbasedev->num_regions = dev_info.num_regions;
- vbasedev->flags = dev_info.flags;
-
- trace_vfio_get_device(name, dev_info.flags, dev_info.num_regions,
- dev_info.num_irqs);
-
- vbasedev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET);
- return 0;
-}
-
-void vfio_put_base_device(VFIODevice *vbasedev)
-{
- if (!vbasedev->group) {
- return;
- }
- QLIST_REMOVE(vbasedev, next);
- vbasedev->group = NULL;
- trace_vfio_put_base_device(vbasedev->fd);
- close(vbasedev->fd);
-}
-
-int vfio_get_region_info(VFIODevice *vbasedev, int index,
- struct vfio_region_info **info)
-{
- size_t argsz = sizeof(struct vfio_region_info);
-
- *info = g_malloc0(argsz);
-
- (*info)->index = index;
- (*info)->argsz = argsz;
-
- if (ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, *info)) {
- g_free(*info);
- return -errno;
- }
-
- return 0;
-}
-
-/*
- * Interfaces for IBM EEH (Enhanced Error Handling)
- */
-static bool vfio_eeh_container_ok(VFIOContainer *container)
-{
- /*
- * As of 2016-03-04 (linux-4.5) the host kernel EEH/VFIO
- * implementation is broken if there are multiple groups in a
- * container. The hardware works in units of Partitionable
- * Endpoints (== IOMMU groups) and the EEH operations naively
- * iterate across all groups in the container, without any logic
- * to make sure the groups have their state synchronized. For
- * certain operations (ENABLE) that might be ok, until an error
- * occurs, but for others (GET_STATE) it's clearly broken.
- */
-
- /*
- * XXX Once fixed kernels exist, test for them here
- */
-
- if (QLIST_EMPTY(&container->group_list)) {
- return false;
- }
-
- if (QLIST_NEXT(QLIST_FIRST(&container->group_list), container_next)) {
- return false;
- }
-
- return true;
-}
-
-static int vfio_eeh_container_op(VFIOContainer *container, uint32_t op)
-{
- struct vfio_eeh_pe_op pe_op = {
- .argsz = sizeof(pe_op),
- .op = op,
- };
- int ret;
-
- if (!vfio_eeh_container_ok(container)) {
- error_report("vfio/eeh: EEH_PE_OP 0x%x: "
- "kernel requires a container with exactly one group", op);
- return -EPERM;
- }
-
- ret = ioctl(container->fd, VFIO_EEH_PE_OP, &pe_op);
- if (ret < 0) {
- error_report("vfio/eeh: EEH_PE_OP 0x%x failed: %m", op);
- return -errno;
- }
-
- return 0;
-}
-
-static VFIOContainer *vfio_eeh_as_container(AddressSpace *as)
-{
- VFIOAddressSpace *space = vfio_get_address_space(as);
- VFIOContainer *container = NULL;
-
- if (QLIST_EMPTY(&space->containers)) {
- /* No containers to act on */
- goto out;
- }
-
- container = QLIST_FIRST(&space->containers);
-
- if (QLIST_NEXT(container, next)) {
- /* We don't yet have logic to synchronize EEH state across
- * multiple containers */
- container = NULL;
- goto out;
- }
-
-out:
- vfio_put_address_space(space);
- return container;
-}
-
-bool vfio_eeh_as_ok(AddressSpace *as)
-{
- VFIOContainer *container = vfio_eeh_as_container(as);
-
- return (container != NULL) && vfio_eeh_container_ok(container);
-}
-
-int vfio_eeh_as_op(AddressSpace *as, uint32_t op)
-{
- VFIOContainer *container = vfio_eeh_as_container(as);
-
- if (!container) {
- return -ENODEV;
- }
- return vfio_eeh_container_op(container, op);
-}
diff --git a/qemu/hw/vfio/pci-quirks.c b/qemu/hw/vfio/pci-quirks.c
deleted file mode 100644
index 49ecf1172..000000000
--- a/qemu/hw/vfio/pci-quirks.c
+++ /dev/null
@@ -1,1205 +0,0 @@
-/*
- * device quirks for PCI devices
- *
- * Copyright Red Hat, Inc. 2012-2015
- *
- * Authors:
- * Alex Williamson <alex.williamson@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- */
-
-#include "qemu/osdep.h"
-#include "pci.h"
-#include "trace.h"
-#include "qemu/range.h"
-
-/* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */
-static bool vfio_pci_is(VFIOPCIDevice *vdev, uint32_t vendor, uint32_t device)
-{
- return (vendor == PCI_ANY_ID || vendor == vdev->vendor_id) &&
- (device == PCI_ANY_ID || device == vdev->device_id);
-}
-
-static bool vfio_is_vga(VFIOPCIDevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint16_t class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
-
- return class == PCI_CLASS_DISPLAY_VGA;
-}
-
-/*
- * List of device ids/vendor ids for which to disable
- * option rom loading. This avoids the guest hangs during rom
- * execution as noticed with the BCM 57810 card for lack of a
- * more better way to handle such issues.
- * The user can still override by specifying a romfile or
- * rombar=1.
- * Please see https://bugs.launchpad.net/qemu/+bug/1284874
- * for an analysis of the 57810 card hang. When adding
- * a new vendor id/device id combination below, please also add
- * your card/environment details and information that could
- * help in debugging to the bug tracking this issue
- */
-static const struct {
- uint32_t vendor;
- uint32_t device;
-} romblacklist[] = {
- { 0x14e4, 0x168e }, /* Broadcom BCM 57810 */
-};
-
-bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0 ; i < ARRAY_SIZE(romblacklist); i++) {
- if (vfio_pci_is(vdev, romblacklist[i].vendor, romblacklist[i].device)) {
- trace_vfio_quirk_rom_blacklisted(vdev->vbasedev.name,
- romblacklist[i].vendor,
- romblacklist[i].device);
- return true;
- }
- }
- return false;
-}
-
-/*
- * Device specific region quirks (mostly backdoors to PCI config space)
- */
-
-/*
- * The generic window quirks operate on an address and data register,
- * vfio_generic_window_address_quirk handles the address register and
- * vfio_generic_window_data_quirk handles the data register. These ops
- * pass reads and writes through to hardware until a value matching the
- * stored address match/mask is written. When this occurs, the data
- * register access emulated PCI config space for the device rather than
- * passing through accesses. This enables devices where PCI config space
- * is accessible behind a window register to maintain the virtualization
- * provided through vfio.
- */
-typedef struct VFIOConfigWindowMatch {
- uint32_t match;
- uint32_t mask;
-} VFIOConfigWindowMatch;
-
-typedef struct VFIOConfigWindowQuirk {
- struct VFIOPCIDevice *vdev;
-
- uint32_t address_val;
-
- uint32_t address_offset;
- uint32_t data_offset;
-
- bool window_enabled;
- uint8_t bar;
-
- MemoryRegion *addr_mem;
- MemoryRegion *data_mem;
-
- uint32_t nr_matches;
- VFIOConfigWindowMatch matches[];
-} VFIOConfigWindowQuirk;
-
-static uint64_t vfio_generic_window_quirk_address_read(void *opaque,
- hwaddr addr,
- unsigned size)
-{
- VFIOConfigWindowQuirk *window = opaque;
- VFIOPCIDevice *vdev = window->vdev;
-
- return vfio_region_read(&vdev->bars[window->bar].region,
- addr + window->address_offset, size);
-}
-
-static void vfio_generic_window_quirk_address_write(void *opaque, hwaddr addr,
- uint64_t data,
- unsigned size)
-{
- VFIOConfigWindowQuirk *window = opaque;
- VFIOPCIDevice *vdev = window->vdev;
- int i;
-
- window->window_enabled = false;
-
- vfio_region_write(&vdev->bars[window->bar].region,
- addr + window->address_offset, data, size);
-
- for (i = 0; i < window->nr_matches; i++) {
- if ((data & ~window->matches[i].mask) == window->matches[i].match) {
- window->window_enabled = true;
- window->address_val = data & window->matches[i].mask;
- trace_vfio_quirk_generic_window_address_write(vdev->vbasedev.name,
- memory_region_name(window->addr_mem), data);
- break;
- }
- }
-}
-
-static const MemoryRegionOps vfio_generic_window_address_quirk = {
- .read = vfio_generic_window_quirk_address_read,
- .write = vfio_generic_window_quirk_address_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static uint64_t vfio_generic_window_quirk_data_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOConfigWindowQuirk *window = opaque;
- VFIOPCIDevice *vdev = window->vdev;
- uint64_t data;
-
- /* Always read data reg, discard if window enabled */
- data = vfio_region_read(&vdev->bars[window->bar].region,
- addr + window->data_offset, size);
-
- if (window->window_enabled) {
- data = vfio_pci_read_config(&vdev->pdev, window->address_val, size);
- trace_vfio_quirk_generic_window_data_read(vdev->vbasedev.name,
- memory_region_name(window->data_mem), data);
- }
-
- return data;
-}
-
-static void vfio_generic_window_quirk_data_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOConfigWindowQuirk *window = opaque;
- VFIOPCIDevice *vdev = window->vdev;
-
- if (window->window_enabled) {
- vfio_pci_write_config(&vdev->pdev, window->address_val, data, size);
- trace_vfio_quirk_generic_window_data_write(vdev->vbasedev.name,
- memory_region_name(window->data_mem), data);
- return;
- }
-
- vfio_region_write(&vdev->bars[window->bar].region,
- addr + window->data_offset, data, size);
-}
-
-static const MemoryRegionOps vfio_generic_window_data_quirk = {
- .read = vfio_generic_window_quirk_data_read,
- .write = vfio_generic_window_quirk_data_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-/*
- * The generic mirror quirk handles devices which expose PCI config space
- * through a region within a BAR. When enabled, reads and writes are
- * redirected through to emulated PCI config space. XXX if PCI config space
- * used memory regions, this could just be an alias.
- */
-typedef struct VFIOConfigMirrorQuirk {
- struct VFIOPCIDevice *vdev;
- uint32_t offset;
- uint8_t bar;
- MemoryRegion *mem;
-} VFIOConfigMirrorQuirk;
-
-static uint64_t vfio_generic_quirk_mirror_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOConfigMirrorQuirk *mirror = opaque;
- VFIOPCIDevice *vdev = mirror->vdev;
- uint64_t data;
-
- /* Read and discard in case the hardware cares */
- (void)vfio_region_read(&vdev->bars[mirror->bar].region,
- addr + mirror->offset, size);
-
- data = vfio_pci_read_config(&vdev->pdev, addr, size);
- trace_vfio_quirk_generic_mirror_read(vdev->vbasedev.name,
- memory_region_name(mirror->mem),
- addr, data);
- return data;
-}
-
-static void vfio_generic_quirk_mirror_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOConfigMirrorQuirk *mirror = opaque;
- VFIOPCIDevice *vdev = mirror->vdev;
-
- vfio_pci_write_config(&vdev->pdev, addr, data, size);
- trace_vfio_quirk_generic_mirror_write(vdev->vbasedev.name,
- memory_region_name(mirror->mem),
- addr, data);
-}
-
-static const MemoryRegionOps vfio_generic_mirror_quirk = {
- .read = vfio_generic_quirk_mirror_read,
- .write = vfio_generic_quirk_mirror_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-/* Is range1 fully contained within range2? */
-static bool vfio_range_contained(uint64_t first1, uint64_t len1,
- uint64_t first2, uint64_t len2) {
- return (first1 >= first2 && first1 + len1 <= first2 + len2);
-}
-
-#define PCI_VENDOR_ID_ATI 0x1002
-
-/*
- * Radeon HD cards (HD5450 & HD7850) report the upper byte of the I/O port BAR
- * through VGA register 0x3c3. On newer cards, the I/O port BAR is always
- * BAR4 (older cards like the X550 used BAR1, but we don't care to support
- * those). Note that on bare metal, a read of 0x3c3 doesn't always return the
- * I/O port BAR address. Originally this was coded to return the virtual BAR
- * address only if the physical register read returns the actual BAR address,
- * but users have reported greater success if we return the virtual address
- * unconditionally.
- */
-static uint64_t vfio_ati_3c3_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOPCIDevice *vdev = opaque;
- uint64_t data = vfio_pci_read_config(&vdev->pdev,
- PCI_BASE_ADDRESS_4 + 1, size);
-
- trace_vfio_quirk_ati_3c3_read(vdev->vbasedev.name, data);
-
- return data;
-}
-
-static const MemoryRegionOps vfio_ati_3c3_quirk = {
- .read = vfio_ati_3c3_quirk_read,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_vga_probe_ati_3c3_quirk(VFIOPCIDevice *vdev)
-{
- VFIOQuirk *quirk;
-
- /*
- * As long as the BAR is >= 256 bytes it will be aligned such that the
- * lower byte is always zero. Filter out anything else, if it exists.
- */
- if (!vfio_pci_is(vdev, PCI_VENDOR_ID_ATI, PCI_ANY_ID) ||
- !vdev->bars[4].ioport || vdev->bars[4].region.size < 256) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->mem = g_new0(MemoryRegion, 1);
- quirk->nr_mem = 1;
-
- memory_region_init_io(quirk->mem, OBJECT(vdev), &vfio_ati_3c3_quirk, vdev,
- "vfio-ati-3c3-quirk", 1);
- memory_region_add_subregion(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].mem,
- 3 /* offset 3 bytes from 0x3c0 */, quirk->mem);
-
- QLIST_INSERT_HEAD(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].quirks,
- quirk, next);
-
- trace_vfio_quirk_ati_3c3_probe(vdev->vbasedev.name);
-}
-
-/*
- * Newer ATI/AMD devices, including HD5450 and HD7850, have a mirror to PCI
- * config space through MMIO BAR2 at offset 0x4000. Nothing seems to access
- * the MMIO space directly, but a window to this space is provided through
- * I/O port BAR4. Offset 0x0 is the address register and offset 0x4 is the
- * data register. When the address is programmed to a range of 0x4000-0x4fff
- * PCI configuration space is available. Experimentation seems to indicate
- * that read-only may be provided by hardware.
- */
-static void vfio_probe_ati_bar4_quirk(VFIOPCIDevice *vdev, int nr)
-{
- VFIOQuirk *quirk;
- VFIOConfigWindowQuirk *window;
-
- /* This windows doesn't seem to be used except by legacy VGA code */
- if (!vfio_pci_is(vdev, PCI_VENDOR_ID_ATI, PCI_ANY_ID) ||
- !vdev->has_vga || nr != 4) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->mem = g_new0(MemoryRegion, 2);
- quirk->nr_mem = 2;
- window = quirk->data = g_malloc0(sizeof(*window) +
- sizeof(VFIOConfigWindowMatch));
- window->vdev = vdev;
- window->address_offset = 0;
- window->data_offset = 4;
- window->nr_matches = 1;
- window->matches[0].match = 0x4000;
- window->matches[0].mask = vdev->config_size - 1;
- window->bar = nr;
- window->addr_mem = &quirk->mem[0];
- window->data_mem = &quirk->mem[1];
-
- memory_region_init_io(window->addr_mem, OBJECT(vdev),
- &vfio_generic_window_address_quirk, window,
- "vfio-ati-bar4-window-address-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- window->address_offset,
- window->addr_mem, 1);
-
- memory_region_init_io(window->data_mem, OBJECT(vdev),
- &vfio_generic_window_data_quirk, window,
- "vfio-ati-bar4-window-data-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- window->data_offset,
- window->data_mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_quirk_ati_bar4_probe(vdev->vbasedev.name);
-}
-
-/*
- * Trap the BAR2 MMIO mirror to config space as well.
- */
-static void vfio_probe_ati_bar2_quirk(VFIOPCIDevice *vdev, int nr)
-{
- VFIOQuirk *quirk;
- VFIOConfigMirrorQuirk *mirror;
-
- /* Only enable on newer devices where BAR2 is 64bit */
- if (!vfio_pci_is(vdev, PCI_VENDOR_ID_ATI, PCI_ANY_ID) ||
- !vdev->has_vga || nr != 2 || !vdev->bars[2].mem64) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- mirror = quirk->data = g_malloc0(sizeof(*mirror));
- mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
- quirk->nr_mem = 1;
- mirror->vdev = vdev;
- mirror->offset = 0x4000;
- mirror->bar = nr;
-
- memory_region_init_io(mirror->mem, OBJECT(vdev),
- &vfio_generic_mirror_quirk, mirror,
- "vfio-ati-bar2-4000-quirk", PCI_CONFIG_SPACE_SIZE);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- mirror->offset, mirror->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_quirk_ati_bar2_probe(vdev->vbasedev.name);
-}
-
-/*
- * Older ATI/AMD cards like the X550 have a similar window to that above.
- * I/O port BAR1 provides a window to a mirror of PCI config space located
- * in BAR2 at offset 0xf00. We don't care to support such older cards, but
- * note it for future reference.
- */
-
-#define PCI_VENDOR_ID_NVIDIA 0x10de
-
-/*
- * Nvidia has several different methods to get to config space, the
- * nouveu project has several of these documented here:
- * https://github.com/pathscale/envytools/tree/master/hwdocs
- *
- * The first quirk is actually not documented in envytools and is found
- * on 10de:01d1 (NVIDIA Corporation G72 [GeForce 7300 LE]). This is an
- * NV46 chipset. The backdoor uses the legacy VGA I/O ports to access
- * the mirror of PCI config space found at BAR0 offset 0x1800. The access
- * sequence first writes 0x338 to I/O port 0x3d4. The target offset is
- * then written to 0x3d0. Finally 0x538 is written for a read and 0x738
- * is written for a write to 0x3d4. The BAR0 offset is then accessible
- * through 0x3d0. This quirk doesn't seem to be necessary on newer cards
- * that use the I/O port BAR5 window but it doesn't hurt to leave it.
- */
-typedef enum {NONE = 0, SELECT, WINDOW, READ, WRITE} VFIONvidia3d0State;
-static const char *nv3d0_states[] = { "NONE", "SELECT",
- "WINDOW", "READ", "WRITE" };
-
-typedef struct VFIONvidia3d0Quirk {
- VFIOPCIDevice *vdev;
- VFIONvidia3d0State state;
- uint32_t offset;
-} VFIONvidia3d0Quirk;
-
-static uint64_t vfio_nvidia_3d4_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIONvidia3d0Quirk *quirk = opaque;
- VFIOPCIDevice *vdev = quirk->vdev;
-
- quirk->state = NONE;
-
- return vfio_vga_read(&vdev->vga->region[QEMU_PCI_VGA_IO_HI],
- addr + 0x14, size);
-}
-
-static void vfio_nvidia_3d4_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIONvidia3d0Quirk *quirk = opaque;
- VFIOPCIDevice *vdev = quirk->vdev;
- VFIONvidia3d0State old_state = quirk->state;
-
- quirk->state = NONE;
-
- switch (data) {
- case 0x338:
- if (old_state == NONE) {
- quirk->state = SELECT;
- trace_vfio_quirk_nvidia_3d0_state(vdev->vbasedev.name,
- nv3d0_states[quirk->state]);
- }
- break;
- case 0x538:
- if (old_state == WINDOW) {
- quirk->state = READ;
- trace_vfio_quirk_nvidia_3d0_state(vdev->vbasedev.name,
- nv3d0_states[quirk->state]);
- }
- break;
- case 0x738:
- if (old_state == WINDOW) {
- quirk->state = WRITE;
- trace_vfio_quirk_nvidia_3d0_state(vdev->vbasedev.name,
- nv3d0_states[quirk->state]);
- }
- break;
- }
-
- vfio_vga_write(&vdev->vga->region[QEMU_PCI_VGA_IO_HI],
- addr + 0x14, data, size);
-}
-
-static const MemoryRegionOps vfio_nvidia_3d4_quirk = {
- .read = vfio_nvidia_3d4_quirk_read,
- .write = vfio_nvidia_3d4_quirk_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static uint64_t vfio_nvidia_3d0_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIONvidia3d0Quirk *quirk = opaque;
- VFIOPCIDevice *vdev = quirk->vdev;
- VFIONvidia3d0State old_state = quirk->state;
- uint64_t data = vfio_vga_read(&vdev->vga->region[QEMU_PCI_VGA_IO_HI],
- addr + 0x10, size);
-
- quirk->state = NONE;
-
- if (old_state == READ &&
- (quirk->offset & ~(PCI_CONFIG_SPACE_SIZE - 1)) == 0x1800) {
- uint8_t offset = quirk->offset & (PCI_CONFIG_SPACE_SIZE - 1);
-
- data = vfio_pci_read_config(&vdev->pdev, offset, size);
- trace_vfio_quirk_nvidia_3d0_read(vdev->vbasedev.name,
- offset, size, data);
- }
-
- return data;
-}
-
-static void vfio_nvidia_3d0_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIONvidia3d0Quirk *quirk = opaque;
- VFIOPCIDevice *vdev = quirk->vdev;
- VFIONvidia3d0State old_state = quirk->state;
-
- quirk->state = NONE;
-
- if (old_state == SELECT) {
- quirk->offset = (uint32_t)data;
- quirk->state = WINDOW;
- trace_vfio_quirk_nvidia_3d0_state(vdev->vbasedev.name,
- nv3d0_states[quirk->state]);
- } else if (old_state == WRITE) {
- if ((quirk->offset & ~(PCI_CONFIG_SPACE_SIZE - 1)) == 0x1800) {
- uint8_t offset = quirk->offset & (PCI_CONFIG_SPACE_SIZE - 1);
-
- vfio_pci_write_config(&vdev->pdev, offset, data, size);
- trace_vfio_quirk_nvidia_3d0_write(vdev->vbasedev.name,
- offset, data, size);
- return;
- }
- }
-
- vfio_vga_write(&vdev->vga->region[QEMU_PCI_VGA_IO_HI],
- addr + 0x10, data, size);
-}
-
-static const MemoryRegionOps vfio_nvidia_3d0_quirk = {
- .read = vfio_nvidia_3d0_quirk_read,
- .write = vfio_nvidia_3d0_quirk_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_vga_probe_nvidia_3d0_quirk(VFIOPCIDevice *vdev)
-{
- VFIOQuirk *quirk;
- VFIONvidia3d0Quirk *data;
-
- if (!vfio_pci_is(vdev, PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID) ||
- !vdev->bars[1].region.size) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->data = data = g_malloc0(sizeof(*data));
- quirk->mem = g_new0(MemoryRegion, 2);
- quirk->nr_mem = 2;
- data->vdev = vdev;
-
- memory_region_init_io(&quirk->mem[0], OBJECT(vdev), &vfio_nvidia_3d4_quirk,
- data, "vfio-nvidia-3d4-quirk", 2);
- memory_region_add_subregion(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].mem,
- 0x14 /* 0x3c0 + 0x14 */, &quirk->mem[0]);
-
- memory_region_init_io(&quirk->mem[1], OBJECT(vdev), &vfio_nvidia_3d0_quirk,
- data, "vfio-nvidia-3d0-quirk", 2);
- memory_region_add_subregion(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].mem,
- 0x10 /* 0x3c0 + 0x10 */, &quirk->mem[1]);
-
- QLIST_INSERT_HEAD(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].quirks,
- quirk, next);
-
- trace_vfio_quirk_nvidia_3d0_probe(vdev->vbasedev.name);
-}
-
-/*
- * The second quirk is documented in envytools. The I/O port BAR5 is just
- * a set of address/data ports to the MMIO BARs. The BAR we care about is
- * again BAR0. This backdoor is apparently a bit newer than the one above
- * so we need to not only trap 256 bytes @0x1800, but all of PCI config
- * space, including extended space is available at the 4k @0x88000.
- */
-typedef struct VFIONvidiaBAR5Quirk {
- uint32_t master;
- uint32_t enable;
- MemoryRegion *addr_mem;
- MemoryRegion *data_mem;
- bool enabled;
- VFIOConfigWindowQuirk window; /* last for match data */
-} VFIONvidiaBAR5Quirk;
-
-static void vfio_nvidia_bar5_enable(VFIONvidiaBAR5Quirk *bar5)
-{
- VFIOPCIDevice *vdev = bar5->window.vdev;
-
- if (((bar5->master & bar5->enable) & 0x1) == bar5->enabled) {
- return;
- }
-
- bar5->enabled = !bar5->enabled;
- trace_vfio_quirk_nvidia_bar5_state(vdev->vbasedev.name,
- bar5->enabled ? "Enable" : "Disable");
- memory_region_set_enabled(bar5->addr_mem, bar5->enabled);
- memory_region_set_enabled(bar5->data_mem, bar5->enabled);
-}
-
-static uint64_t vfio_nvidia_bar5_quirk_master_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIONvidiaBAR5Quirk *bar5 = opaque;
- VFIOPCIDevice *vdev = bar5->window.vdev;
-
- return vfio_region_read(&vdev->bars[5].region, addr, size);
-}
-
-static void vfio_nvidia_bar5_quirk_master_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIONvidiaBAR5Quirk *bar5 = opaque;
- VFIOPCIDevice *vdev = bar5->window.vdev;
-
- vfio_region_write(&vdev->bars[5].region, addr, data, size);
-
- bar5->master = data;
- vfio_nvidia_bar5_enable(bar5);
-}
-
-static const MemoryRegionOps vfio_nvidia_bar5_quirk_master = {
- .read = vfio_nvidia_bar5_quirk_master_read,
- .write = vfio_nvidia_bar5_quirk_master_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static uint64_t vfio_nvidia_bar5_quirk_enable_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIONvidiaBAR5Quirk *bar5 = opaque;
- VFIOPCIDevice *vdev = bar5->window.vdev;
-
- return vfio_region_read(&vdev->bars[5].region, addr + 4, size);
-}
-
-static void vfio_nvidia_bar5_quirk_enable_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIONvidiaBAR5Quirk *bar5 = opaque;
- VFIOPCIDevice *vdev = bar5->window.vdev;
-
- vfio_region_write(&vdev->bars[5].region, addr + 4, data, size);
-
- bar5->enable = data;
- vfio_nvidia_bar5_enable(bar5);
-}
-
-static const MemoryRegionOps vfio_nvidia_bar5_quirk_enable = {
- .read = vfio_nvidia_bar5_quirk_enable_read,
- .write = vfio_nvidia_bar5_quirk_enable_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_probe_nvidia_bar5_quirk(VFIOPCIDevice *vdev, int nr)
-{
- VFIOQuirk *quirk;
- VFIONvidiaBAR5Quirk *bar5;
- VFIOConfigWindowQuirk *window;
-
- if (!vfio_pci_is(vdev, PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID) ||
- !vdev->has_vga || nr != 5) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->mem = g_new0(MemoryRegion, 4);
- quirk->nr_mem = 4;
- bar5 = quirk->data = g_malloc0(sizeof(*bar5) +
- (sizeof(VFIOConfigWindowMatch) * 2));
- window = &bar5->window;
-
- window->vdev = vdev;
- window->address_offset = 0x8;
- window->data_offset = 0xc;
- window->nr_matches = 2;
- window->matches[0].match = 0x1800;
- window->matches[0].mask = PCI_CONFIG_SPACE_SIZE - 1;
- window->matches[1].match = 0x88000;
- window->matches[1].mask = vdev->config_size - 1;
- window->bar = nr;
- window->addr_mem = bar5->addr_mem = &quirk->mem[0];
- window->data_mem = bar5->data_mem = &quirk->mem[1];
-
- memory_region_init_io(window->addr_mem, OBJECT(vdev),
- &vfio_generic_window_address_quirk, window,
- "vfio-nvidia-bar5-window-address-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- window->address_offset,
- window->addr_mem, 1);
- memory_region_set_enabled(window->addr_mem, false);
-
- memory_region_init_io(window->data_mem, OBJECT(vdev),
- &vfio_generic_window_data_quirk, window,
- "vfio-nvidia-bar5-window-data-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- window->data_offset,
- window->data_mem, 1);
- memory_region_set_enabled(window->data_mem, false);
-
- memory_region_init_io(&quirk->mem[2], OBJECT(vdev),
- &vfio_nvidia_bar5_quirk_master, bar5,
- "vfio-nvidia-bar5-master-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- 0, &quirk->mem[2], 1);
-
- memory_region_init_io(&quirk->mem[3], OBJECT(vdev),
- &vfio_nvidia_bar5_quirk_enable, bar5,
- "vfio-nvidia-bar5-enable-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- 4, &quirk->mem[3], 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_quirk_nvidia_bar5_probe(vdev->vbasedev.name);
-}
-
-/*
- * Finally, BAR0 itself. We want to redirect any accesses to either
- * 0x1800 or 0x88000 through the PCI config space access functions.
- */
-static void vfio_nvidia_quirk_mirror_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOConfigMirrorQuirk *mirror = opaque;
- VFIOPCIDevice *vdev = mirror->vdev;
- PCIDevice *pdev = &vdev->pdev;
-
- vfio_generic_quirk_mirror_write(opaque, addr, data, size);
-
- /*
- * Nvidia seems to acknowledge MSI interrupts by writing 0xff to the
- * MSI capability ID register. Both the ID and next register are
- * read-only, so we allow writes covering either of those to real hw.
- */
- if ((pdev->cap_present & QEMU_PCI_CAP_MSI) &&
- vfio_range_contained(addr, size, pdev->msi_cap, PCI_MSI_FLAGS)) {
- vfio_region_write(&vdev->bars[mirror->bar].region,
- addr + mirror->offset, data, size);
- trace_vfio_quirk_nvidia_bar0_msi_ack(vdev->vbasedev.name);
- }
-}
-
-static const MemoryRegionOps vfio_nvidia_mirror_quirk = {
- .read = vfio_generic_quirk_mirror_read,
- .write = vfio_nvidia_quirk_mirror_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_probe_nvidia_bar0_quirk(VFIOPCIDevice *vdev, int nr)
-{
- VFIOQuirk *quirk;
- VFIOConfigMirrorQuirk *mirror;
-
- if (!vfio_pci_is(vdev, PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID) ||
- !vfio_is_vga(vdev) || nr != 0) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- mirror = quirk->data = g_malloc0(sizeof(*mirror));
- mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
- quirk->nr_mem = 1;
- mirror->vdev = vdev;
- mirror->offset = 0x88000;
- mirror->bar = nr;
-
- memory_region_init_io(mirror->mem, OBJECT(vdev),
- &vfio_nvidia_mirror_quirk, mirror,
- "vfio-nvidia-bar0-88000-mirror-quirk",
- vdev->config_size);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- mirror->offset, mirror->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- /* The 0x1800 offset mirror only seems to get used by legacy VGA */
- if (vdev->has_vga) {
- quirk = g_malloc0(sizeof(*quirk));
- mirror = quirk->data = g_malloc0(sizeof(*mirror));
- mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
- quirk->nr_mem = 1;
- mirror->vdev = vdev;
- mirror->offset = 0x1800;
- mirror->bar = nr;
-
- memory_region_init_io(mirror->mem, OBJECT(vdev),
- &vfio_nvidia_mirror_quirk, mirror,
- "vfio-nvidia-bar0-1800-mirror-quirk",
- PCI_CONFIG_SPACE_SIZE);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- mirror->offset, mirror->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
- }
-
- trace_vfio_quirk_nvidia_bar0_probe(vdev->vbasedev.name);
-}
-
-/*
- * TODO - Some Nvidia devices provide config access to their companion HDA
- * device and even to their parent bridge via these config space mirrors.
- * Add quirks for those regions.
- */
-
-#define PCI_VENDOR_ID_REALTEK 0x10ec
-
-/*
- * RTL8168 devices have a backdoor that can access the MSI-X table. At BAR2
- * offset 0x70 there is a dword data register, offset 0x74 is a dword address
- * register. According to the Linux r8169 driver, the MSI-X table is addressed
- * when the "type" portion of the address register is set to 0x1. This appears
- * to be bits 16:30. Bit 31 is both a write indicator and some sort of
- * "address latched" indicator. Bits 12:15 are a mask field, which we can
- * ignore because the MSI-X table should always be accessed as a dword (full
- * mask). Bits 0:11 is offset within the type.
- *
- * Example trace:
- *
- * Read from MSI-X table offset 0
- * vfio: vfio_bar_write(0000:05:00.0:BAR2+0x74, 0x1f000, 4) // store read addr
- * vfio: vfio_bar_read(0000:05:00.0:BAR2+0x74, 4) = 0x8001f000 // latch
- * vfio: vfio_bar_read(0000:05:00.0:BAR2+0x70, 4) = 0xfee00398 // read data
- *
- * Write 0xfee00000 to MSI-X table offset 0
- * vfio: vfio_bar_write(0000:05:00.0:BAR2+0x70, 0xfee00000, 4) // write data
- * vfio: vfio_bar_write(0000:05:00.0:BAR2+0x74, 0x8001f000, 4) // do write
- * vfio: vfio_bar_read(0000:05:00.0:BAR2+0x74, 4) = 0x1f000 // complete
- */
-typedef struct VFIOrtl8168Quirk {
- VFIOPCIDevice *vdev;
- uint32_t addr;
- uint32_t data;
- bool enabled;
-} VFIOrtl8168Quirk;
-
-static uint64_t vfio_rtl8168_quirk_address_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOrtl8168Quirk *rtl = opaque;
- VFIOPCIDevice *vdev = rtl->vdev;
- uint64_t data = vfio_region_read(&vdev->bars[2].region, addr + 0x74, size);
-
- if (rtl->enabled) {
- data = rtl->addr ^ 0x80000000U; /* latch/complete */
- trace_vfio_quirk_rtl8168_fake_latch(vdev->vbasedev.name, data);
- }
-
- return data;
-}
-
-static void vfio_rtl8168_quirk_address_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOrtl8168Quirk *rtl = opaque;
- VFIOPCIDevice *vdev = rtl->vdev;
-
- rtl->enabled = false;
-
- if ((data & 0x7fff0000) == 0x10000) { /* MSI-X table */
- rtl->enabled = true;
- rtl->addr = (uint32_t)data;
-
- if (data & 0x80000000U) { /* Do write */
- if (vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX) {
- hwaddr offset = data & 0xfff;
- uint64_t val = rtl->data;
-
- trace_vfio_quirk_rtl8168_msix_write(vdev->vbasedev.name,
- (uint16_t)offset, val);
-
- /* Write to the proper guest MSI-X table instead */
- memory_region_dispatch_write(&vdev->pdev.msix_table_mmio,
- offset, val, size,
- MEMTXATTRS_UNSPECIFIED);
- }
- return; /* Do not write guest MSI-X data to hardware */
- }
- }
-
- vfio_region_write(&vdev->bars[2].region, addr + 0x74, data, size);
-}
-
-static const MemoryRegionOps vfio_rtl_address_quirk = {
- .read = vfio_rtl8168_quirk_address_read,
- .write = vfio_rtl8168_quirk_address_write,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4,
- .unaligned = false,
- },
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static uint64_t vfio_rtl8168_quirk_data_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOrtl8168Quirk *rtl = opaque;
- VFIOPCIDevice *vdev = rtl->vdev;
- uint64_t data = vfio_region_read(&vdev->bars[2].region, addr + 0x74, size);
-
- if (rtl->enabled && (vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX)) {
- hwaddr offset = rtl->addr & 0xfff;
- memory_region_dispatch_read(&vdev->pdev.msix_table_mmio, offset,
- &data, size, MEMTXATTRS_UNSPECIFIED);
- trace_vfio_quirk_rtl8168_msix_read(vdev->vbasedev.name, offset, data);
- }
-
- return data;
-}
-
-static void vfio_rtl8168_quirk_data_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOrtl8168Quirk *rtl = opaque;
- VFIOPCIDevice *vdev = rtl->vdev;
-
- rtl->data = (uint32_t)data;
-
- vfio_region_write(&vdev->bars[2].region, addr + 0x70, data, size);
-}
-
-static const MemoryRegionOps vfio_rtl_data_quirk = {
- .read = vfio_rtl8168_quirk_data_read,
- .write = vfio_rtl8168_quirk_data_write,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4,
- .unaligned = false,
- },
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_probe_rtl8168_bar2_quirk(VFIOPCIDevice *vdev, int nr)
-{
- VFIOQuirk *quirk;
- VFIOrtl8168Quirk *rtl;
-
- if (!vfio_pci_is(vdev, PCI_VENDOR_ID_REALTEK, 0x8168) || nr != 2) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->mem = g_new0(MemoryRegion, 2);
- quirk->nr_mem = 2;
- quirk->data = rtl = g_malloc0(sizeof(*rtl));
- rtl->vdev = vdev;
-
- memory_region_init_io(&quirk->mem[0], OBJECT(vdev),
- &vfio_rtl_address_quirk, rtl,
- "vfio-rtl8168-window-address-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- 0x74, &quirk->mem[0], 1);
-
- memory_region_init_io(&quirk->mem[1], OBJECT(vdev),
- &vfio_rtl_data_quirk, rtl,
- "vfio-rtl8168-window-data-quirk", 4);
- memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
- 0x70, &quirk->mem[1], 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_quirk_rtl8168_probe(vdev->vbasedev.name);
-}
-
-/*
- * Common quirk probe entry points.
- */
-void vfio_vga_quirk_setup(VFIOPCIDevice *vdev)
-{
- vfio_vga_probe_ati_3c3_quirk(vdev);
- vfio_vga_probe_nvidia_3d0_quirk(vdev);
-}
-
-void vfio_vga_quirk_exit(VFIOPCIDevice *vdev)
-{
- VFIOQuirk *quirk;
- int i, j;
-
- for (i = 0; i < ARRAY_SIZE(vdev->vga->region); i++) {
- QLIST_FOREACH(quirk, &vdev->vga->region[i].quirks, next) {
- for (j = 0; j < quirk->nr_mem; j++) {
- memory_region_del_subregion(&vdev->vga->region[i].mem,
- &quirk->mem[j]);
- }
- }
- }
-}
-
-void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev)
-{
- int i, j;
-
- for (i = 0; i < ARRAY_SIZE(vdev->vga->region); i++) {
- while (!QLIST_EMPTY(&vdev->vga->region[i].quirks)) {
- VFIOQuirk *quirk = QLIST_FIRST(&vdev->vga->region[i].quirks);
- QLIST_REMOVE(quirk, next);
- for (j = 0; j < quirk->nr_mem; j++) {
- object_unparent(OBJECT(&quirk->mem[j]));
- }
- g_free(quirk->mem);
- g_free(quirk->data);
- g_free(quirk);
- }
- }
-}
-
-void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr)
-{
- vfio_probe_ati_bar4_quirk(vdev, nr);
- vfio_probe_ati_bar2_quirk(vdev, nr);
- vfio_probe_nvidia_bar5_quirk(vdev, nr);
- vfio_probe_nvidia_bar0_quirk(vdev, nr);
- vfio_probe_rtl8168_bar2_quirk(vdev, nr);
-}
-
-void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr)
-{
- VFIOBAR *bar = &vdev->bars[nr];
- VFIOQuirk *quirk;
- int i;
-
- QLIST_FOREACH(quirk, &bar->quirks, next) {
- for (i = 0; i < quirk->nr_mem; i++) {
- memory_region_del_subregion(bar->region.mem, &quirk->mem[i]);
- }
- }
-}
-
-void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr)
-{
- VFIOBAR *bar = &vdev->bars[nr];
- int i;
-
- while (!QLIST_EMPTY(&bar->quirks)) {
- VFIOQuirk *quirk = QLIST_FIRST(&bar->quirks);
- QLIST_REMOVE(quirk, next);
- for (i = 0; i < quirk->nr_mem; i++) {
- object_unparent(OBJECT(&quirk->mem[i]));
- }
- g_free(quirk->mem);
- g_free(quirk->data);
- g_free(quirk);
- }
-}
-
-/*
- * Reset quirks
- */
-
-/*
- * AMD Radeon PCI config reset, based on Linux:
- * drivers/gpu/drm/radeon/ci_smc.c:ci_is_smc_running()
- * drivers/gpu/drm/radeon/radeon_device.c:radeon_pci_config_reset
- * drivers/gpu/drm/radeon/ci_smc.c:ci_reset_smc()
- * drivers/gpu/drm/radeon/ci_smc.c:ci_stop_smc_clock()
- * IDs: include/drm/drm_pciids.h
- * Registers: http://cgit.freedesktop.org/~agd5f/linux/commit/?id=4e2aa447f6f0
- *
- * Bonaire and Hawaii GPUs do not respond to a bus reset. This is a bug in the
- * hardware that should be fixed on future ASICs. The symptom of this is that
- * once the accerlated driver loads, Windows guests will bsod on subsequent
- * attmpts to load the driver, such as after VM reset or shutdown/restart. To
- * work around this, we do an AMD specific PCI config reset, followed by an SMC
- * reset. The PCI config reset only works if SMC firmware is running, so we
- * have a dependency on the state of the device as to whether this reset will
- * be effective. There are still cases where we won't be able to kick the
- * device into working, but this greatly improves the usability overall. The
- * config reset magic is relatively common on AMD GPUs, but the setup and SMC
- * poking is largely ASIC specific.
- */
-static bool vfio_radeon_smc_is_running(VFIOPCIDevice *vdev)
-{
- uint32_t clk, pc_c;
-
- /*
- * Registers 200h and 204h are index and data registers for accessing
- * indirect configuration registers within the device.
- */
- vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000004, 4);
- clk = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
- vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000370, 4);
- pc_c = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
-
- return (!(clk & 1) && (0x20100 <= pc_c));
-}
-
-/*
- * The scope of a config reset is controlled by a mode bit in the misc register
- * and a fuse, exposed as a bit in another register. The fuse is the default
- * (0 = GFX, 1 = whole GPU), the misc bit is a toggle, with the forumula
- * scope = !(misc ^ fuse), where the resulting scope is defined the same as
- * the fuse. A truth table therefore tells us that if misc == fuse, we need
- * to flip the value of the bit in the misc register.
- */
-static void vfio_radeon_set_gfx_only_reset(VFIOPCIDevice *vdev)
-{
- uint32_t misc, fuse;
- bool a, b;
-
- vfio_region_write(&vdev->bars[5].region, 0x200, 0xc00c0000, 4);
- fuse = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
- b = fuse & 64;
-
- vfio_region_write(&vdev->bars[5].region, 0x200, 0xc0000010, 4);
- misc = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
- a = misc & 2;
-
- if (a == b) {
- vfio_region_write(&vdev->bars[5].region, 0x204, misc ^ 2, 4);
- vfio_region_read(&vdev->bars[5].region, 0x204, 4); /* flush */
- }
-}
-
-static int vfio_radeon_reset(VFIOPCIDevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- int i, ret = 0;
- uint32_t data;
-
- /* Defer to a kernel implemented reset */
- if (vdev->vbasedev.reset_works) {
- trace_vfio_quirk_ati_bonaire_reset_skipped(vdev->vbasedev.name);
- return -ENODEV;
- }
-
- /* Enable only memory BAR access */
- vfio_pci_write_config(pdev, PCI_COMMAND, PCI_COMMAND_MEMORY, 2);
-
- /* Reset only works if SMC firmware is loaded and running */
- if (!vfio_radeon_smc_is_running(vdev)) {
- ret = -EINVAL;
- trace_vfio_quirk_ati_bonaire_reset_no_smc(vdev->vbasedev.name);
- goto out;
- }
-
- /* Make sure only the GFX function is reset */
- vfio_radeon_set_gfx_only_reset(vdev);
-
- /* AMD PCI config reset */
- vfio_pci_write_config(pdev, 0x7c, 0x39d5e86b, 4);
- usleep(100);
-
- /* Read back the memory size to make sure we're out of reset */
- for (i = 0; i < 100000; i++) {
- if (vfio_region_read(&vdev->bars[5].region, 0x5428, 4) != 0xffffffff) {
- goto reset_smc;
- }
- usleep(1);
- }
-
- trace_vfio_quirk_ati_bonaire_reset_timeout(vdev->vbasedev.name);
-
-reset_smc:
- /* Reset SMC */
- vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000000, 4);
- data = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
- data |= 1;
- vfio_region_write(&vdev->bars[5].region, 0x204, data, 4);
-
- /* Disable SMC clock */
- vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000004, 4);
- data = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
- data |= 1;
- vfio_region_write(&vdev->bars[5].region, 0x204, data, 4);
-
- trace_vfio_quirk_ati_bonaire_reset_done(vdev->vbasedev.name);
-
-out:
- /* Restore PCI command register */
- vfio_pci_write_config(pdev, PCI_COMMAND, 0, 2);
-
- return ret;
-}
-
-void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev)
-{
- switch (vdev->vendor_id) {
- case 0x1002:
- switch (vdev->device_id) {
- /* Bonaire */
- case 0x6649: /* Bonaire [FirePro W5100] */
- case 0x6650:
- case 0x6651:
- case 0x6658: /* Bonaire XTX [Radeon R7 260X] */
- case 0x665c: /* Bonaire XT [Radeon HD 7790/8770 / R9 260 OEM] */
- case 0x665d: /* Bonaire [Radeon R7 200 Series] */
- /* Hawaii */
- case 0x67A0: /* Hawaii XT GL [FirePro W9100] */
- case 0x67A1: /* Hawaii PRO GL [FirePro W8100] */
- case 0x67A2:
- case 0x67A8:
- case 0x67A9:
- case 0x67AA:
- case 0x67B0: /* Hawaii XT [Radeon R9 290X] */
- case 0x67B1: /* Hawaii PRO [Radeon R9 290] */
- case 0x67B8:
- case 0x67B9:
- case 0x67BA:
- case 0x67BE:
- vdev->resetfn = vfio_radeon_reset;
- trace_vfio_quirk_ati_bonaire_reset(vdev->vbasedev.name);
- break;
- }
- break;
- }
-}
diff --git a/qemu/hw/vfio/pci.c b/qemu/hw/vfio/pci.c
deleted file mode 100644
index d091d8cf0..000000000
--- a/qemu/hw/vfio/pci.c
+++ /dev/null
@@ -1,2734 +0,0 @@
-/*
- * vfio based device assignment support
- *
- * Copyright Red Hat, Inc. 2012
- *
- * Authors:
- * Alex Williamson <alex.williamson@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Based on qemu-kvm device-assignment:
- * Adapted for KVM by Qumranet.
- * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
- * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
- * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
- * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
- * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
- */
-
-#include "qemu/osdep.h"
-#include <linux/vfio.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-
-#include "hw/pci/msi.h"
-#include "hw/pci/msix.h"
-#include "hw/pci/pci_bridge.h"
-#include "qemu/error-report.h"
-#include "qemu/range.h"
-#include "sysemu/kvm.h"
-#include "sysemu/sysemu.h"
-#include "pci.h"
-#include "trace.h"
-
-#define MSIX_CAP_LENGTH 12
-
-static void vfio_disable_interrupts(VFIOPCIDevice *vdev);
-static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled);
-
-/*
- * Disabling BAR mmaping can be slow, but toggling it around INTx can
- * also be a huge overhead. We try to get the best of both worlds by
- * waiting until an interrupt to disable mmaps (subsequent transitions
- * to the same state are effectively no overhead). If the interrupt has
- * been serviced and the time gap is long enough, we re-enable mmaps for
- * performance. This works well for things like graphics cards, which
- * may not use their interrupt at all and are penalized to an unusable
- * level by read/write BAR traps. Other devices, like NICs, have more
- * regular interrupts and see much better latency by staying in non-mmap
- * mode. We therefore set the default mmap_timeout such that a ping
- * is just enough to keep the mmap disabled. Users can experiment with
- * other options with the x-intx-mmap-timeout-ms parameter (a value of
- * zero disables the timer).
- */
-static void vfio_intx_mmap_enable(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (vdev->intx.pending) {
- timer_mod(vdev->intx.mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
- return;
- }
-
- vfio_mmap_set_enabled(vdev, true);
-}
-
-static void vfio_intx_interrupt(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->intx.interrupt)) {
- return;
- }
-
- trace_vfio_intx_interrupt(vdev->vbasedev.name, 'A' + vdev->intx.pin);
-
- vdev->intx.pending = true;
- pci_irq_assert(&vdev->pdev);
- vfio_mmap_set_enabled(vdev, false);
- if (vdev->intx.mmap_timeout) {
- timer_mod(vdev->intx.mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
- }
-}
-
-static void vfio_intx_eoi(VFIODevice *vbasedev)
-{
- VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
-
- if (!vdev->intx.pending) {
- return;
- }
-
- trace_vfio_intx_eoi(vbasedev->name);
-
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
- vfio_unmask_single_irqindex(vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-}
-
-static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev)
-{
-#ifdef CONFIG_KVM
- struct kvm_irqfd irqfd = {
- .fd = event_notifier_get_fd(&vdev->intx.interrupt),
- .gsi = vdev->intx.route.irq,
- .flags = KVM_IRQFD_FLAG_RESAMPLE,
- };
- struct vfio_irq_set *irq_set;
- int ret, argsz;
- int32_t *pfd;
-
- if (vdev->no_kvm_intx || !kvm_irqfds_enabled() ||
- vdev->intx.route.mode != PCI_INTX_ENABLED ||
- !kvm_resamplefds_enabled()) {
- return;
- }
-
- /* Get to a known interrupt state */
- qemu_set_fd_handler(irqfd.fd, NULL, NULL, vdev);
- vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
-
- /* Get an eventfd for resample/unmask */
- if (event_notifier_init(&vdev->intx.unmask, 0)) {
- error_report("vfio: Error: event_notifier_init failed eoi");
- goto fail;
- }
-
- /* KVM triggers it, VFIO listens for it */
- irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask);
-
- if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
- error_report("vfio: Error: Failed to setup resample irqfd: %m");
- goto fail_irqfd;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK;
- irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = irqfd.resamplefd;
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: Error: Failed to setup INTx unmask fd: %m");
- goto fail_vfio;
- }
-
- /* Let'em rip */
- vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-
- vdev->intx.kvm_accel = true;
-
- trace_vfio_intx_enable_kvm(vdev->vbasedev.name);
-
- return;
-
-fail_vfio:
- irqfd.flags = KVM_IRQFD_FLAG_DEASSIGN;
- kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);
-fail_irqfd:
- event_notifier_cleanup(&vdev->intx.unmask);
-fail:
- qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
- vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-#endif
-}
-
-static void vfio_intx_disable_kvm(VFIOPCIDevice *vdev)
-{
-#ifdef CONFIG_KVM
- struct kvm_irqfd irqfd = {
- .fd = event_notifier_get_fd(&vdev->intx.interrupt),
- .gsi = vdev->intx.route.irq,
- .flags = KVM_IRQFD_FLAG_DEASSIGN,
- };
-
- if (!vdev->intx.kvm_accel) {
- return;
- }
-
- /*
- * Get to a known state, hardware masked, QEMU ready to accept new
- * interrupts, QEMU IRQ de-asserted.
- */
- vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
-
- /* Tell KVM to stop listening for an INTx irqfd */
- if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
- error_report("vfio: Error: Failed to disable INTx irqfd: %m");
- }
-
- /* We only need to close the eventfd for VFIO to cleanup the kernel side */
- event_notifier_cleanup(&vdev->intx.unmask);
-
- /* QEMU starts listening for interrupt events. */
- qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
-
- vdev->intx.kvm_accel = false;
-
- /* If we've missed an event, let it re-fire through QEMU */
- vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-
- trace_vfio_intx_disable_kvm(vdev->vbasedev.name);
-#endif
-}
-
-static void vfio_intx_update(PCIDevice *pdev)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- PCIINTxRoute route;
-
- if (vdev->interrupt != VFIO_INT_INTx) {
- return;
- }
-
- route = pci_device_route_intx_to_irq(&vdev->pdev, vdev->intx.pin);
-
- if (!pci_intx_route_changed(&vdev->intx.route, &route)) {
- return; /* Nothing changed */
- }
-
- trace_vfio_intx_update(vdev->vbasedev.name,
- vdev->intx.route.irq, route.irq);
-
- vfio_intx_disable_kvm(vdev);
-
- vdev->intx.route = route;
-
- if (route.mode != PCI_INTX_ENABLED) {
- return;
- }
-
- vfio_intx_enable_kvm(vdev);
-
- /* Re-enable the interrupt in cased we missed an EOI */
- vfio_intx_eoi(&vdev->vbasedev);
-}
-
-static int vfio_intx_enable(VFIOPCIDevice *vdev)
-{
- uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
- int ret, argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!pin) {
- return 0;
- }
-
- vfio_disable_interrupts(vdev);
-
- vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */
- pci_config_set_interrupt_pin(vdev->pdev.config, pin);
-
-#ifdef CONFIG_KVM
- /*
- * Only conditional to avoid generating error messages on platforms
- * where we won't actually use the result anyway.
- */
- if (kvm_irqfds_enabled() && kvm_resamplefds_enabled()) {
- vdev->intx.route = pci_device_route_intx_to_irq(&vdev->pdev,
- vdev->intx.pin);
- }
-#endif
-
- ret = event_notifier_init(&vdev->intx.interrupt, 0);
- if (ret) {
- error_report("vfio: Error: event_notifier_init failed");
- return ret;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->intx.interrupt);
- qemu_set_fd_handler(*pfd, vfio_intx_interrupt, NULL, vdev);
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: Error: Failed to setup INTx fd: %m");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->intx.interrupt);
- return -errno;
- }
-
- vfio_intx_enable_kvm(vdev);
-
- vdev->interrupt = VFIO_INT_INTx;
-
- trace_vfio_intx_enable(vdev->vbasedev.name);
-
- return 0;
-}
-
-static void vfio_intx_disable(VFIOPCIDevice *vdev)
-{
- int fd;
-
- timer_del(vdev->intx.mmap_timer);
- vfio_intx_disable_kvm(vdev);
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
- vfio_mmap_set_enabled(vdev, true);
-
- fd = event_notifier_get_fd(&vdev->intx.interrupt);
- qemu_set_fd_handler(fd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->intx.interrupt);
-
- vdev->interrupt = VFIO_INT_NONE;
-
- trace_vfio_intx_disable(vdev->vbasedev.name);
-}
-
-/*
- * MSI/X
- */
-static void vfio_msi_interrupt(void *opaque)
-{
- VFIOMSIVector *vector = opaque;
- VFIOPCIDevice *vdev = vector->vdev;
- MSIMessage (*get_msg)(PCIDevice *dev, unsigned vector);
- void (*notify)(PCIDevice *dev, unsigned vector);
- MSIMessage msg;
- int nr = vector - vdev->msi_vectors;
-
- if (!event_notifier_test_and_clear(&vector->interrupt)) {
- return;
- }
-
- if (vdev->interrupt == VFIO_INT_MSIX) {
- get_msg = msix_get_message;
- notify = msix_notify;
-
- /* A masked vector firing needs to use the PBA, enable it */
- if (msix_is_masked(&vdev->pdev, nr)) {
- set_bit(nr, vdev->msix->pending);
- memory_region_set_enabled(&vdev->pdev.msix_pba_mmio, true);
- trace_vfio_msix_pba_enable(vdev->vbasedev.name);
- }
- } else if (vdev->interrupt == VFIO_INT_MSI) {
- get_msg = msi_get_message;
- notify = msi_notify;
- } else {
- abort();
- }
-
- msg = get_msg(&vdev->pdev, nr);
- trace_vfio_msi_interrupt(vdev->vbasedev.name, nr, msg.address, msg.data);
- notify(&vdev->pdev, nr);
-}
-
-static int vfio_enable_vectors(VFIOPCIDevice *vdev, bool msix)
-{
- struct vfio_irq_set *irq_set;
- int ret = 0, i, argsz;
- int32_t *fds;
-
- argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds));
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = vdev->nr_vectors;
- fds = (int32_t *)&irq_set->data;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- int fd = -1;
-
- /*
- * MSI vs MSI-X - The guest has direct access to MSI mask and pending
- * bits, therefore we always use the KVM signaling path when setup.
- * MSI-X mask and pending bits are emulated, so we want to use the
- * KVM signaling path only when configured and unmasked.
- */
- if (vdev->msi_vectors[i].use) {
- if (vdev->msi_vectors[i].virq < 0 ||
- (msix && msix_is_masked(&vdev->pdev, i))) {
- fd = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt);
- } else {
- fd = event_notifier_get_fd(&vdev->msi_vectors[i].kvm_interrupt);
- }
- }
-
- fds[i] = fd;
- }
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
-
- g_free(irq_set);
-
- return ret;
-}
-
-static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev, VFIOMSIVector *vector,
- MSIMessage *msg, bool msix)
-{
- int virq;
-
- if ((msix && vdev->no_kvm_msix) || (!msix && vdev->no_kvm_msi) || !msg) {
- return;
- }
-
- if (event_notifier_init(&vector->kvm_interrupt, 0)) {
- return;
- }
-
- virq = kvm_irqchip_add_msi_route(kvm_state, *msg, &vdev->pdev);
- if (virq < 0) {
- event_notifier_cleanup(&vector->kvm_interrupt);
- return;
- }
-
- if (kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &vector->kvm_interrupt,
- NULL, virq) < 0) {
- kvm_irqchip_release_virq(kvm_state, virq);
- event_notifier_cleanup(&vector->kvm_interrupt);
- return;
- }
-
- vector->virq = virq;
-}
-
-static void vfio_remove_kvm_msi_virq(VFIOMSIVector *vector)
-{
- kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, &vector->kvm_interrupt,
- vector->virq);
- kvm_irqchip_release_virq(kvm_state, vector->virq);
- vector->virq = -1;
- event_notifier_cleanup(&vector->kvm_interrupt);
-}
-
-static void vfio_update_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage msg,
- PCIDevice *pdev)
-{
- kvm_irqchip_update_msi_route(kvm_state, vector->virq, msg, pdev);
-}
-
-static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
- MSIMessage *msg, IOHandler *handler)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- VFIOMSIVector *vector;
- int ret;
-
- trace_vfio_msix_vector_do_use(vdev->vbasedev.name, nr);
-
- vector = &vdev->msi_vectors[nr];
-
- if (!vector->use) {
- vector->vdev = vdev;
- vector->virq = -1;
- if (event_notifier_init(&vector->interrupt, 0)) {
- error_report("vfio: Error: event_notifier_init failed");
- }
- vector->use = true;
- msix_vector_use(pdev, nr);
- }
-
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- handler, NULL, vector);
-
- /*
- * Attempt to enable route through KVM irqchip,
- * default to userspace handling if unavailable.
- */
- if (vector->virq >= 0) {
- if (!msg) {
- vfio_remove_kvm_msi_virq(vector);
- } else {
- vfio_update_kvm_msi_virq(vector, *msg, pdev);
- }
- } else {
- vfio_add_kvm_msi_virq(vdev, vector, msg, true);
- }
-
- /*
- * We don't want to have the host allocate all possible MSI vectors
- * for a device if they're not in use, so we shutdown and incrementally
- * increase them as needed.
- */
- if (vdev->nr_vectors < nr + 1) {
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX);
- vdev->nr_vectors = nr + 1;
- ret = vfio_enable_vectors(vdev, true);
- if (ret) {
- error_report("vfio: failed to enable vectors, %d", ret);
- }
- } else {
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
- irq_set->start = nr;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- if (vector->virq >= 0) {
- *pfd = event_notifier_get_fd(&vector->kvm_interrupt);
- } else {
- *pfd = event_notifier_get_fd(&vector->interrupt);
- }
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: failed to modify vector, %d", ret);
- }
- }
-
- /* Disable PBA emulation when nothing more is pending. */
- clear_bit(nr, vdev->msix->pending);
- if (find_first_bit(vdev->msix->pending,
- vdev->nr_vectors) == vdev->nr_vectors) {
- memory_region_set_enabled(&vdev->pdev.msix_pba_mmio, false);
- trace_vfio_msix_pba_disable(vdev->vbasedev.name);
- }
-
- return 0;
-}
-
-static int vfio_msix_vector_use(PCIDevice *pdev,
- unsigned int nr, MSIMessage msg)
-{
- return vfio_msix_vector_do_use(pdev, nr, &msg, vfio_msi_interrupt);
-}
-
-static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- VFIOMSIVector *vector = &vdev->msi_vectors[nr];
-
- trace_vfio_msix_vector_release(vdev->vbasedev.name, nr);
-
- /*
- * There are still old guests that mask and unmask vectors on every
- * interrupt. If we're using QEMU bypass with a KVM irqfd, leave all of
- * the KVM setup in place, simply switch VFIO to use the non-bypass
- * eventfd. We'll then fire the interrupt through QEMU and the MSI-X
- * core will mask the interrupt and set pending bits, allowing it to
- * be re-asserted on unmask. Nothing to do if already using QEMU mode.
- */
- if (vector->virq >= 0) {
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
- irq_set->start = nr;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vector->interrupt);
-
- ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
-
- g_free(irq_set);
- }
-}
-
-static void vfio_msix_enable(VFIOPCIDevice *vdev)
-{
- vfio_disable_interrupts(vdev);
-
- vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->msix->entries);
-
- vdev->interrupt = VFIO_INT_MSIX;
-
- /*
- * Some communication channels between VF & PF or PF & fw rely on the
- * physical state of the device and expect that enabling MSI-X from the
- * guest enables the same on the host. When our guest is Linux, the
- * guest driver call to pci_enable_msix() sets the enabling bit in the
- * MSI-X capability, but leaves the vector table masked. We therefore
- * can't rely on a vector_use callback (from request_irq() in the guest)
- * to switch the physical device into MSI-X mode because that may come a
- * long time after pci_enable_msix(). This code enables vector 0 with
- * triggering to userspace, then immediately release the vector, leaving
- * the physical device with no vectors enabled, but MSI-X enabled, just
- * like the guest view.
- */
- vfio_msix_vector_do_use(&vdev->pdev, 0, NULL, NULL);
- vfio_msix_vector_release(&vdev->pdev, 0);
-
- if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
- vfio_msix_vector_release, NULL)) {
- error_report("vfio: msix_set_vector_notifiers failed");
- }
-
- trace_vfio_msix_enable(vdev->vbasedev.name);
-}
-
-static void vfio_msi_enable(VFIOPCIDevice *vdev)
-{
- int ret, i;
-
- vfio_disable_interrupts(vdev);
-
- vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
-retry:
- vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->nr_vectors);
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- MSIMessage msg = msi_get_message(&vdev->pdev, i);
-
- vector->vdev = vdev;
- vector->virq = -1;
- vector->use = true;
-
- if (event_notifier_init(&vector->interrupt, 0)) {
- error_report("vfio: Error: event_notifier_init failed");
- }
-
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- vfio_msi_interrupt, NULL, vector);
-
- /*
- * Attempt to enable route through KVM irqchip,
- * default to userspace handling if unavailable.
- */
- vfio_add_kvm_msi_virq(vdev, vector, &msg, false);
- }
-
- /* Set interrupt type prior to possible interrupts */
- vdev->interrupt = VFIO_INT_MSI;
-
- ret = vfio_enable_vectors(vdev, false);
- if (ret) {
- if (ret < 0) {
- error_report("vfio: Error: Failed to setup MSI fds: %m");
- } else if (ret != vdev->nr_vectors) {
- error_report("vfio: Error: Failed to enable %d "
- "MSI vectors, retry with %d", vdev->nr_vectors, ret);
- }
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- if (vector->virq >= 0) {
- vfio_remove_kvm_msi_virq(vector);
- }
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- NULL, NULL, NULL);
- event_notifier_cleanup(&vector->interrupt);
- }
-
- g_free(vdev->msi_vectors);
-
- if (ret > 0 && ret != vdev->nr_vectors) {
- vdev->nr_vectors = ret;
- goto retry;
- }
- vdev->nr_vectors = 0;
-
- /*
- * Failing to setup MSI doesn't really fall within any specification.
- * Let's try leaving interrupts disabled and hope the guest figures
- * out to fall back to INTx for this device.
- */
- error_report("vfio: Error: Failed to enable MSI");
- vdev->interrupt = VFIO_INT_NONE;
-
- return;
- }
-
- trace_vfio_msi_enable(vdev->vbasedev.name, vdev->nr_vectors);
-}
-
-static void vfio_msi_disable_common(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- if (vdev->msi_vectors[i].use) {
- if (vector->virq >= 0) {
- vfio_remove_kvm_msi_virq(vector);
- }
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- NULL, NULL, NULL);
- event_notifier_cleanup(&vector->interrupt);
- }
- }
-
- g_free(vdev->msi_vectors);
- vdev->msi_vectors = NULL;
- vdev->nr_vectors = 0;
- vdev->interrupt = VFIO_INT_NONE;
-
- vfio_intx_enable(vdev);
-}
-
-static void vfio_msix_disable(VFIOPCIDevice *vdev)
-{
- int i;
-
- msix_unset_vector_notifiers(&vdev->pdev);
-
- /*
- * MSI-X will only release vectors if MSI-X is still enabled on the
- * device, check through the rest and release it ourselves if necessary.
- */
- for (i = 0; i < vdev->nr_vectors; i++) {
- if (vdev->msi_vectors[i].use) {
- vfio_msix_vector_release(&vdev->pdev, i);
- msix_vector_unuse(&vdev->pdev, i);
- }
- }
-
- if (vdev->nr_vectors) {
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX);
- }
-
- vfio_msi_disable_common(vdev);
-
- memset(vdev->msix->pending, 0,
- BITS_TO_LONGS(vdev->msix->entries) * sizeof(unsigned long));
-
- trace_vfio_msix_disable(vdev->vbasedev.name);
-}
-
-static void vfio_msi_disable(VFIOPCIDevice *vdev)
-{
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSI_IRQ_INDEX);
- vfio_msi_disable_common(vdev);
-
- trace_vfio_msi_disable(vdev->vbasedev.name);
-}
-
-static void vfio_update_msi(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- MSIMessage msg;
-
- if (!vector->use || vector->virq < 0) {
- continue;
- }
-
- msg = msi_get_message(&vdev->pdev, i);
- vfio_update_kvm_msi_virq(vector, msg, &vdev->pdev);
- }
-}
-
-static void vfio_pci_load_rom(VFIOPCIDevice *vdev)
-{
- struct vfio_region_info *reg_info;
- uint64_t size;
- off_t off = 0;
- ssize_t bytes;
-
- if (vfio_get_region_info(&vdev->vbasedev,
- VFIO_PCI_ROM_REGION_INDEX, &reg_info)) {
- error_report("vfio: Error getting ROM info: %m");
- return;
- }
-
- trace_vfio_pci_load_rom(vdev->vbasedev.name, (unsigned long)reg_info->size,
- (unsigned long)reg_info->offset,
- (unsigned long)reg_info->flags);
-
- vdev->rom_size = size = reg_info->size;
- vdev->rom_offset = reg_info->offset;
-
- g_free(reg_info);
-
- if (!vdev->rom_size) {
- vdev->rom_read_failed = true;
- error_report("vfio-pci: Cannot read device rom at "
- "%s", vdev->vbasedev.name);
- error_printf("Device option ROM contents are probably invalid "
- "(check dmesg).\nSkip option ROM probe with rombar=0, "
- "or load from file with romfile=\n");
- return;
- }
-
- vdev->rom = g_malloc(size);
- memset(vdev->rom, 0xff, size);
-
- while (size) {
- bytes = pread(vdev->vbasedev.fd, vdev->rom + off,
- size, vdev->rom_offset + off);
- if (bytes == 0) {
- break;
- } else if (bytes > 0) {
- off += bytes;
- size -= bytes;
- } else {
- if (errno == EINTR || errno == EAGAIN) {
- continue;
- }
- error_report("vfio: Error reading device ROM: %m");
- break;
- }
- }
-
- /*
- * Test the ROM signature against our device, if the vendor is correct
- * but the device ID doesn't match, store the correct device ID and
- * recompute the checksum. Intel IGD devices need this and are known
- * to have bogus checksums so we can't simply adjust the checksum.
- */
- if (pci_get_word(vdev->rom) == 0xaa55 &&
- pci_get_word(vdev->rom + 0x18) + 8 < vdev->rom_size &&
- !memcmp(vdev->rom + pci_get_word(vdev->rom + 0x18), "PCIR", 4)) {
- uint16_t vid, did;
-
- vid = pci_get_word(vdev->rom + pci_get_word(vdev->rom + 0x18) + 4);
- did = pci_get_word(vdev->rom + pci_get_word(vdev->rom + 0x18) + 6);
-
- if (vid == vdev->vendor_id && did != vdev->device_id) {
- int i;
- uint8_t csum, *data = vdev->rom;
-
- pci_set_word(vdev->rom + pci_get_word(vdev->rom + 0x18) + 6,
- vdev->device_id);
- data[6] = 0;
-
- for (csum = 0, i = 0; i < vdev->rom_size; i++) {
- csum += data[i];
- }
-
- data[6] = -csum;
- }
- }
-}
-
-static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
-{
- VFIOPCIDevice *vdev = opaque;
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } val;
- uint64_t data = 0;
-
- /* Load the ROM lazily when the guest tries to read it */
- if (unlikely(!vdev->rom && !vdev->rom_read_failed)) {
- vfio_pci_load_rom(vdev);
- }
-
- memcpy(&val, vdev->rom + addr,
- (addr < vdev->rom_size) ? MIN(size, vdev->rom_size - addr) : 0);
-
- switch (size) {
- case 1:
- data = val.byte;
- break;
- case 2:
- data = le16_to_cpu(val.word);
- break;
- case 4:
- data = le32_to_cpu(val.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes\n", size);
- break;
- }
-
- trace_vfio_rom_read(vdev->vbasedev.name, addr, size, data);
-
- return data;
-}
-
-static void vfio_rom_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
-}
-
-static const MemoryRegionOps vfio_rom_ops = {
- .read = vfio_rom_read,
- .write = vfio_rom_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
-{
- uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK);
- off_t offset = vdev->config_offset + PCI_ROM_ADDRESS;
- DeviceState *dev = DEVICE(vdev);
- char *name;
- int fd = vdev->vbasedev.fd;
-
- if (vdev->pdev.romfile || !vdev->pdev.rom_bar) {
- /* Since pci handles romfile, just print a message and return */
- if (vfio_blacklist_opt_rom(vdev) && vdev->pdev.romfile) {
- error_printf("Warning : Device at %s is known to cause system instability issues during option rom execution. Proceeding anyway since user specified romfile\n",
- vdev->vbasedev.name);
- }
- return;
- }
-
- /*
- * Use the same size ROM BAR as the physical device. The contents
- * will get filled in later when the guest tries to read it.
- */
- if (pread(fd, &orig, 4, offset) != 4 ||
- pwrite(fd, &size, 4, offset) != 4 ||
- pread(fd, &size, 4, offset) != 4 ||
- pwrite(fd, &orig, 4, offset) != 4) {
- error_report("%s(%s) failed: %m", __func__, vdev->vbasedev.name);
- return;
- }
-
- size = ~(le32_to_cpu(size) & PCI_ROM_ADDRESS_MASK) + 1;
-
- if (!size) {
- return;
- }
-
- if (vfio_blacklist_opt_rom(vdev)) {
- if (dev->opts && qemu_opt_get(dev->opts, "rombar")) {
- error_printf("Warning : Device at %s is known to cause system instability issues during option rom execution. Proceeding anyway since user specified non zero value for rombar\n",
- vdev->vbasedev.name);
- } else {
- error_printf("Warning : Rom loading for device at %s has been disabled due to system instability issues. Specify rombar=1 or romfile to force\n",
- vdev->vbasedev.name);
- return;
- }
- }
-
- trace_vfio_pci_size_rom(vdev->vbasedev.name, size);
-
- name = g_strdup_printf("vfio[%s].rom", vdev->vbasedev.name);
-
- memory_region_init_io(&vdev->pdev.rom, OBJECT(vdev),
- &vfio_rom_ops, vdev, name, size);
- g_free(name);
-
- pci_register_bar(&vdev->pdev, PCI_ROM_SLOT,
- PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom);
-
- vdev->pdev.has_rom = true;
- vdev->rom_read_failed = false;
-}
-
-void vfio_vga_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOVGARegion *region = opaque;
- VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- off_t offset = vga->fd_offset + region->offset + addr;
-
- switch (size) {
- case 1:
- buf.byte = data;
- break;
- case 2:
- buf.word = cpu_to_le16(data);
- break;
- case 4:
- buf.dword = cpu_to_le32(data);
- break;
- default:
- hw_error("vfio: unsupported write size, %d bytes", size);
- break;
- }
-
- if (pwrite(vga->fd, &buf, size, offset) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m",
- __func__, region->offset + addr, data, size);
- }
-
- trace_vfio_vga_write(region->offset + addr, data, size);
-}
-
-uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size)
-{
- VFIOVGARegion *region = opaque;
- VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- uint64_t data = 0;
- off_t offset = vga->fd_offset + region->offset + addr;
-
- if (pread(vga->fd, &buf, size, offset) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m",
- __func__, region->offset + addr, size);
- return (uint64_t)-1;
- }
-
- switch (size) {
- case 1:
- data = buf.byte;
- break;
- case 2:
- data = le16_to_cpu(buf.word);
- break;
- case 4:
- data = le32_to_cpu(buf.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes", size);
- break;
- }
-
- trace_vfio_vga_read(region->offset + addr, size, data);
-
- return data;
-}
-
-static const MemoryRegionOps vfio_vga_ops = {
- .read = vfio_vga_read,
- .write = vfio_vga_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-/*
- * PCI config space
- */
-uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- uint32_t emu_bits = 0, emu_val = 0, phys_val = 0, val;
-
- memcpy(&emu_bits, vdev->emulated_config_bits + addr, len);
- emu_bits = le32_to_cpu(emu_bits);
-
- if (emu_bits) {
- emu_val = pci_default_read_config(pdev, addr, len);
- }
-
- if (~emu_bits & (0xffffffffU >> (32 - len * 8))) {
- ssize_t ret;
-
- ret = pread(vdev->vbasedev.fd, &phys_val, len,
- vdev->config_offset + addr);
- if (ret != len) {
- error_report("%s(%s, 0x%x, 0x%x) failed: %m",
- __func__, vdev->vbasedev.name, addr, len);
- return -errno;
- }
- phys_val = le32_to_cpu(phys_val);
- }
-
- val = (emu_val & emu_bits) | (phys_val & ~emu_bits);
-
- trace_vfio_pci_read_config(vdev->vbasedev.name, addr, len, val);
-
- return val;
-}
-
-void vfio_pci_write_config(PCIDevice *pdev,
- uint32_t addr, uint32_t val, int len)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- uint32_t val_le = cpu_to_le32(val);
-
- trace_vfio_pci_write_config(vdev->vbasedev.name, addr, val, len);
-
- /* Write everything to VFIO, let it filter out what we can't write */
- if (pwrite(vdev->vbasedev.fd, &val_le, len, vdev->config_offset + addr)
- != len) {
- error_report("%s(%s, 0x%x, 0x%x, 0x%x) failed: %m",
- __func__, vdev->vbasedev.name, addr, val, len);
- }
-
- /* MSI/MSI-X Enabling/Disabling */
- if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
- ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) {
- int is_enabled, was_enabled = msi_enabled(pdev);
-
- pci_default_write_config(pdev, addr, val, len);
-
- is_enabled = msi_enabled(pdev);
-
- if (!was_enabled) {
- if (is_enabled) {
- vfio_msi_enable(vdev);
- }
- } else {
- if (!is_enabled) {
- vfio_msi_disable(vdev);
- } else {
- vfio_update_msi(vdev);
- }
- }
- } else if (pdev->cap_present & QEMU_PCI_CAP_MSIX &&
- ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) {
- int is_enabled, was_enabled = msix_enabled(pdev);
-
- pci_default_write_config(pdev, addr, val, len);
-
- is_enabled = msix_enabled(pdev);
-
- if (!was_enabled && is_enabled) {
- vfio_msix_enable(vdev);
- } else if (was_enabled && !is_enabled) {
- vfio_msix_disable(vdev);
- }
- } else {
- /* Write everything to QEMU to keep emulated bits correct */
- pci_default_write_config(pdev, addr, val, len);
- }
-}
-
-/*
- * Interrupt setup
- */
-static void vfio_disable_interrupts(VFIOPCIDevice *vdev)
-{
- /*
- * More complicated than it looks. Disabling MSI/X transitions the
- * device to INTx mode (if supported). Therefore we need to first
- * disable MSI/X and then cleanup by disabling INTx.
- */
- if (vdev->interrupt == VFIO_INT_MSIX) {
- vfio_msix_disable(vdev);
- } else if (vdev->interrupt == VFIO_INT_MSI) {
- vfio_msi_disable(vdev);
- }
-
- if (vdev->interrupt == VFIO_INT_INTx) {
- vfio_intx_disable(vdev);
- }
-}
-
-static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos)
-{
- uint16_t ctrl;
- bool msi_64bit, msi_maskbit;
- int ret, entries;
-
- if (pread(vdev->vbasedev.fd, &ctrl, sizeof(ctrl),
- vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
- return -errno;
- }
- ctrl = le16_to_cpu(ctrl);
-
- msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT);
- msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT);
- entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1);
-
- trace_vfio_msi_setup(vdev->vbasedev.name, pos);
-
- ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- return 0;
- }
- error_report("vfio: msi_init failed");
- return ret;
- }
- vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0);
-
- return 0;
-}
-
-static void vfio_pci_fixup_msix_region(VFIOPCIDevice *vdev)
-{
- off_t start, end;
- VFIORegion *region = &vdev->bars[vdev->msix->table_bar].region;
-
- /*
- * We expect to find a single mmap covering the whole BAR, anything else
- * means it's either unsupported or already setup.
- */
- if (region->nr_mmaps != 1 || region->mmaps[0].offset ||
- region->size != region->mmaps[0].size) {
- return;
- }
-
- /* MSI-X table start and end aligned to host page size */
- start = vdev->msix->table_offset & qemu_real_host_page_mask;
- end = REAL_HOST_PAGE_ALIGN((uint64_t)vdev->msix->table_offset +
- (vdev->msix->entries * PCI_MSIX_ENTRY_SIZE));
-
- /*
- * Does the MSI-X table cover the beginning of the BAR? The whole BAR?
- * NB - Host page size is necessarily a power of two and so is the PCI
- * BAR (not counting EA yet), therefore if we have host page aligned
- * @start and @end, then any remainder of the BAR before or after those
- * must be at least host page sized and therefore mmap'able.
- */
- if (!start) {
- if (end >= region->size) {
- region->nr_mmaps = 0;
- g_free(region->mmaps);
- region->mmaps = NULL;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, 0, 0);
- } else {
- region->mmaps[0].offset = end;
- region->mmaps[0].size = region->size - end;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[0].offset,
- region->mmaps[0].offset + region->mmaps[0].size);
- }
-
- /* Maybe it's aligned at the end of the BAR */
- } else if (end >= region->size) {
- region->mmaps[0].size = start;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[0].offset,
- region->mmaps[0].offset + region->mmaps[0].size);
-
- /* Otherwise it must split the BAR */
- } else {
- region->nr_mmaps = 2;
- region->mmaps = g_renew(VFIOMmap, region->mmaps, 2);
-
- memcpy(&region->mmaps[1], &region->mmaps[0], sizeof(VFIOMmap));
-
- region->mmaps[0].size = start;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[0].offset,
- region->mmaps[0].offset + region->mmaps[0].size);
-
- region->mmaps[1].offset = end;
- region->mmaps[1].size = region->size - end;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[1].offset,
- region->mmaps[1].offset + region->mmaps[1].size);
- }
-}
-
-/*
- * We don't have any control over how pci_add_capability() inserts
- * capabilities into the chain. In order to setup MSI-X we need a
- * MemoryRegion for the BAR. In order to setup the BAR and not
- * attempt to mmap the MSI-X table area, which VFIO won't allow, we
- * need to first look for where the MSI-X table lives. So we
- * unfortunately split MSI-X setup across two functions.
- */
-static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
-{
- uint8_t pos;
- uint16_t ctrl;
- uint32_t table, pba;
- int fd = vdev->vbasedev.fd;
- VFIOMSIXInfo *msix;
-
- pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
- if (!pos) {
- return 0;
- }
-
- if (pread(fd, &ctrl, sizeof(ctrl),
- vdev->config_offset + pos + PCI_MSIX_FLAGS) != sizeof(ctrl)) {
- return -errno;
- }
-
- if (pread(fd, &table, sizeof(table),
- vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
- return -errno;
- }
-
- if (pread(fd, &pba, sizeof(pba),
- vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
- return -errno;
- }
-
- ctrl = le16_to_cpu(ctrl);
- table = le32_to_cpu(table);
- pba = le32_to_cpu(pba);
-
- msix = g_malloc0(sizeof(*msix));
- msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
- msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
- msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
- msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
- msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
-
- /*
- * Test the size of the pba_offset variable and catch if it extends outside
- * of the specified BAR. If it is the case, we need to apply a hardware
- * specific quirk if the device is known or we have a broken configuration.
- */
- if (msix->pba_offset >= vdev->bars[msix->pba_bar].region.size) {
- /*
- * Chelsio T5 Virtual Function devices are encoded as 0x58xx for T5
- * adapters. The T5 hardware returns an incorrect value of 0x8000 for
- * the VF PBA offset while the BAR itself is only 8k. The correct value
- * is 0x1000, so we hard code that here.
- */
- if (vdev->vendor_id == PCI_VENDOR_ID_CHELSIO &&
- (vdev->device_id & 0xff00) == 0x5800) {
- msix->pba_offset = 0x1000;
- } else {
- error_report("vfio: Hardware reports invalid configuration, "
- "MSIX PBA outside of specified BAR");
- g_free(msix);
- return -EINVAL;
- }
- }
-
- trace_vfio_msix_early_setup(vdev->vbasedev.name, pos, msix->table_bar,
- msix->table_offset, msix->entries);
- vdev->msix = msix;
-
- vfio_pci_fixup_msix_region(vdev);
-
- return 0;
-}
-
-static int vfio_msix_setup(VFIOPCIDevice *vdev, int pos)
-{
- int ret;
-
- vdev->msix->pending = g_malloc0(BITS_TO_LONGS(vdev->msix->entries) *
- sizeof(unsigned long));
- ret = msix_init(&vdev->pdev, vdev->msix->entries,
- vdev->bars[vdev->msix->table_bar].region.mem,
- vdev->msix->table_bar, vdev->msix->table_offset,
- vdev->bars[vdev->msix->pba_bar].region.mem,
- vdev->msix->pba_bar, vdev->msix->pba_offset, pos);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- return 0;
- }
- error_report("vfio: msix_init failed");
- return ret;
- }
-
- /*
- * The PCI spec suggests that devices provide additional alignment for
- * MSI-X structures and avoid overlapping non-MSI-X related registers.
- * For an assigned device, this hopefully means that emulation of MSI-X
- * structures does not affect the performance of the device. If devices
- * fail to provide that alignment, a significant performance penalty may
- * result, for instance Mellanox MT27500 VFs:
- * http://www.spinics.net/lists/kvm/msg125881.html
- *
- * The PBA is simply not that important for such a serious regression and
- * most drivers do not appear to look at it. The solution for this is to
- * disable the PBA MemoryRegion unless it's being used. We disable it
- * here and only enable it if a masked vector fires through QEMU. As the
- * vector-use notifier is called, which occurs on unmask, we test whether
- * PBA emulation is needed and again disable if not.
- */
- memory_region_set_enabled(&vdev->pdev.msix_pba_mmio, false);
-
- return 0;
-}
-
-static void vfio_teardown_msi(VFIOPCIDevice *vdev)
-{
- msi_uninit(&vdev->pdev);
-
- if (vdev->msix) {
- msix_uninit(&vdev->pdev,
- vdev->bars[vdev->msix->table_bar].region.mem,
- vdev->bars[vdev->msix->pba_bar].region.mem);
- g_free(vdev->msix->pending);
- }
-}
-
-/*
- * Resource setup
- */
-static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_region_mmaps_set_enabled(&vdev->bars[i].region, enabled);
- }
-}
-
-static void vfio_bar_setup(VFIOPCIDevice *vdev, int nr)
-{
- VFIOBAR *bar = &vdev->bars[nr];
-
- uint32_t pci_bar;
- uint8_t type;
- int ret;
-
- /* Skip both unimplemented BARs and the upper half of 64bit BARS. */
- if (!bar->region.size) {
- return;
- }
-
- /* Determine what type of BAR this is for registration */
- ret = pread(vdev->vbasedev.fd, &pci_bar, sizeof(pci_bar),
- vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
- if (ret != sizeof(pci_bar)) {
- error_report("vfio: Failed to read BAR %d (%m)", nr);
- return;
- }
-
- pci_bar = le32_to_cpu(pci_bar);
- bar->ioport = (pci_bar & PCI_BASE_ADDRESS_SPACE_IO);
- bar->mem64 = bar->ioport ? 0 : (pci_bar & PCI_BASE_ADDRESS_MEM_TYPE_64);
- type = pci_bar & (bar->ioport ? ~PCI_BASE_ADDRESS_IO_MASK :
- ~PCI_BASE_ADDRESS_MEM_MASK);
-
- if (vfio_region_mmap(&bar->region)) {
- error_report("Failed to mmap %s BAR %d. Performance may be slow",
- vdev->vbasedev.name, nr);
- }
-
- vfio_bar_quirk_setup(vdev, nr);
-
- pci_register_bar(&vdev->pdev, nr, type, bar->region.mem);
-}
-
-static void vfio_bars_setup(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_bar_setup(vdev, i);
- }
-
- if (vdev->vga) {
- memory_region_init_io(&vdev->vga->region[QEMU_PCI_VGA_MEM].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga->region[QEMU_PCI_VGA_MEM],
- "vfio-vga-mmio@0xa0000",
- QEMU_PCI_VGA_MEM_SIZE);
- memory_region_init_io(&vdev->vga->region[QEMU_PCI_VGA_IO_LO].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga->region[QEMU_PCI_VGA_IO_LO],
- "vfio-vga-io@0x3b0",
- QEMU_PCI_VGA_IO_LO_SIZE);
- memory_region_init_io(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga->region[QEMU_PCI_VGA_IO_HI],
- "vfio-vga-io@0x3c0",
- QEMU_PCI_VGA_IO_HI_SIZE);
-
- pci_register_vga(&vdev->pdev, &vdev->vga->region[QEMU_PCI_VGA_MEM].mem,
- &vdev->vga->region[QEMU_PCI_VGA_IO_LO].mem,
- &vdev->vga->region[QEMU_PCI_VGA_IO_HI].mem);
- vfio_vga_quirk_setup(vdev);
- }
-}
-
-static void vfio_bars_exit(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_bar_quirk_exit(vdev, i);
- vfio_region_exit(&vdev->bars[i].region);
- }
-
- if (vdev->vga) {
- pci_unregister_vga(&vdev->pdev);
- vfio_vga_quirk_exit(vdev);
- }
-}
-
-static void vfio_bars_finalize(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_bar_quirk_finalize(vdev, i);
- vfio_region_finalize(&vdev->bars[i].region);
- }
-
- if (vdev->vga) {
- vfio_vga_quirk_finalize(vdev);
- for (i = 0; i < ARRAY_SIZE(vdev->vga->region); i++) {
- object_unparent(OBJECT(&vdev->vga->region[i].mem));
- }
- g_free(vdev->vga);
- }
-}
-
-/*
- * General setup
- */
-static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
-{
- uint8_t tmp;
- uint16_t next = PCI_CONFIG_SPACE_SIZE;
-
- for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
- tmp = pdev->config[tmp + PCI_CAP_LIST_NEXT]) {
- if (tmp > pos && tmp < next) {
- next = tmp;
- }
- }
-
- return next - pos;
-}
-
-static void vfio_set_word_bits(uint8_t *buf, uint16_t val, uint16_t mask)
-{
- pci_set_word(buf, (pci_get_word(buf) & ~mask) | val);
-}
-
-static void vfio_add_emulated_word(VFIOPCIDevice *vdev, int pos,
- uint16_t val, uint16_t mask)
-{
- vfio_set_word_bits(vdev->pdev.config + pos, val, mask);
- vfio_set_word_bits(vdev->pdev.wmask + pos, ~mask, mask);
- vfio_set_word_bits(vdev->emulated_config_bits + pos, mask, mask);
-}
-
-static void vfio_set_long_bits(uint8_t *buf, uint32_t val, uint32_t mask)
-{
- pci_set_long(buf, (pci_get_long(buf) & ~mask) | val);
-}
-
-static void vfio_add_emulated_long(VFIOPCIDevice *vdev, int pos,
- uint32_t val, uint32_t mask)
-{
- vfio_set_long_bits(vdev->pdev.config + pos, val, mask);
- vfio_set_long_bits(vdev->pdev.wmask + pos, ~mask, mask);
- vfio_set_long_bits(vdev->emulated_config_bits + pos, mask, mask);
-}
-
-static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size)
-{
- uint16_t flags;
- uint8_t type;
-
- flags = pci_get_word(vdev->pdev.config + pos + PCI_CAP_FLAGS);
- type = (flags & PCI_EXP_FLAGS_TYPE) >> 4;
-
- if (type != PCI_EXP_TYPE_ENDPOINT &&
- type != PCI_EXP_TYPE_LEG_END &&
- type != PCI_EXP_TYPE_RC_END) {
-
- error_report("vfio: Assignment of PCIe type 0x%x "
- "devices is not currently supported", type);
- return -EINVAL;
- }
-
- if (!pci_bus_is_express(vdev->pdev.bus)) {
- PCIBus *bus = vdev->pdev.bus;
- PCIDevice *bridge;
-
- /*
- * Traditionally PCI device assignment exposes the PCIe capability
- * as-is on non-express buses. The reason being that some drivers
- * simply assume that it's there, for example tg3. However when
- * we're running on a native PCIe machine type, like Q35, we need
- * to hide the PCIe capability. The reason for this is twofold;
- * first Windows guests get a Code 10 error when the PCIe capability
- * is exposed in this configuration. Therefore express devices won't
- * work at all unless they're attached to express buses in the VM.
- * Second, a native PCIe machine introduces the possibility of fine
- * granularity IOMMUs supporting both translation and isolation.
- * Guest code to discover the IOMMU visibility of a device, such as
- * IOMMU grouping code on Linux, is very aware of device types and
- * valid transitions between bus types. An express device on a non-
- * express bus is not a valid combination on bare metal systems.
- *
- * Drivers that require a PCIe capability to make the device
- * functional are simply going to need to have their devices placed
- * on a PCIe bus in the VM.
- */
- while (!pci_bus_is_root(bus)) {
- bridge = pci_bridge_get_device(bus);
- bus = bridge->bus;
- }
-
- if (pci_bus_is_express(bus)) {
- return 0;
- }
-
- } else if (pci_bus_is_root(vdev->pdev.bus)) {
- /*
- * On a Root Complex bus Endpoints become Root Complex Integrated
- * Endpoints, which changes the type and clears the LNK & LNK2 fields.
- */
- if (type == PCI_EXP_TYPE_ENDPOINT) {
- vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
- PCI_EXP_TYPE_RC_END << 4,
- PCI_EXP_FLAGS_TYPE);
-
- /* Link Capabilities, Status, and Control goes away */
- if (size > PCI_EXP_LNKCTL) {
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA, 0, ~0);
-
-#ifndef PCI_EXP_LNKCAP2
-#define PCI_EXP_LNKCAP2 44
-#endif
-#ifndef PCI_EXP_LNKSTA2
-#define PCI_EXP_LNKSTA2 50
-#endif
- /* Link 2 Capabilities, Status, and Control goes away */
- if (size > PCI_EXP_LNKCAP2) {
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP2, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL2, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA2, 0, ~0);
- }
- }
-
- } else if (type == PCI_EXP_TYPE_LEG_END) {
- /*
- * Legacy endpoints don't belong on the root complex. Windows
- * seems to be happier with devices if we skip the capability.
- */
- return 0;
- }
-
- } else {
- /*
- * Convert Root Complex Integrated Endpoints to regular endpoints.
- * These devices don't support LNK/LNK2 capabilities, so make them up.
- */
- if (type == PCI_EXP_TYPE_RC_END) {
- vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
- PCI_EXP_TYPE_ENDPOINT << 4,
- PCI_EXP_FLAGS_TYPE);
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP,
- PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
- }
-
- /* Mark the Link Status bits as emulated to allow virtual negotiation */
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA,
- pci_get_word(vdev->pdev.config + pos +
- PCI_EXP_LNKSTA),
- PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
- }
-
- pos = pci_add_capability(&vdev->pdev, PCI_CAP_ID_EXP, pos, size);
- if (pos >= 0) {
- vdev->pdev.exp.exp_cap = pos;
- }
-
- return pos;
-}
-
-static void vfio_check_pcie_flr(VFIOPCIDevice *vdev, uint8_t pos)
-{
- uint32_t cap = pci_get_long(vdev->pdev.config + pos + PCI_EXP_DEVCAP);
-
- if (cap & PCI_EXP_DEVCAP_FLR) {
- trace_vfio_check_pcie_flr(vdev->vbasedev.name);
- vdev->has_flr = true;
- }
-}
-
-static void vfio_check_pm_reset(VFIOPCIDevice *vdev, uint8_t pos)
-{
- uint16_t csr = pci_get_word(vdev->pdev.config + pos + PCI_PM_CTRL);
-
- if (!(csr & PCI_PM_CTRL_NO_SOFT_RESET)) {
- trace_vfio_check_pm_reset(vdev->vbasedev.name);
- vdev->has_pm_reset = true;
- }
-}
-
-static void vfio_check_af_flr(VFIOPCIDevice *vdev, uint8_t pos)
-{
- uint8_t cap = pci_get_byte(vdev->pdev.config + pos + PCI_AF_CAP);
-
- if ((cap & PCI_AF_CAP_TP) && (cap & PCI_AF_CAP_FLR)) {
- trace_vfio_check_af_flr(vdev->vbasedev.name);
- vdev->has_flr = true;
- }
-}
-
-static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint8_t cap_id, next, size;
- int ret;
-
- cap_id = pdev->config[pos];
- next = pdev->config[pos + PCI_CAP_LIST_NEXT];
-
- /*
- * If it becomes important to configure capabilities to their actual
- * size, use this as the default when it's something we don't recognize.
- * Since QEMU doesn't actually handle many of the config accesses,
- * exact size doesn't seem worthwhile.
- */
- size = vfio_std_cap_max_size(pdev, pos);
-
- /*
- * pci_add_capability always inserts the new capability at the head
- * of the chain. Therefore to end up with a chain that matches the
- * physical device, we insert from the end by making this recursive.
- * This is also why we pre-calculate size above as cached config space
- * will be changed as we unwind the stack.
- */
- if (next) {
- ret = vfio_add_std_cap(vdev, next);
- if (ret) {
- return ret;
- }
- } else {
- /* Begin the rebuild, use QEMU emulated list bits */
- pdev->config[PCI_CAPABILITY_LIST] = 0;
- vdev->emulated_config_bits[PCI_CAPABILITY_LIST] = 0xff;
- vdev->emulated_config_bits[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
- }
-
- /* Use emulated next pointer to allow dropping caps */
- pci_set_byte(vdev->emulated_config_bits + pos + PCI_CAP_LIST_NEXT, 0xff);
-
- switch (cap_id) {
- case PCI_CAP_ID_MSI:
- ret = vfio_msi_setup(vdev, pos);
- break;
- case PCI_CAP_ID_EXP:
- vfio_check_pcie_flr(vdev, pos);
- ret = vfio_setup_pcie_cap(vdev, pos, size);
- break;
- case PCI_CAP_ID_MSIX:
- ret = vfio_msix_setup(vdev, pos);
- break;
- case PCI_CAP_ID_PM:
- vfio_check_pm_reset(vdev, pos);
- vdev->pm_cap = pos;
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- case PCI_CAP_ID_AF:
- vfio_check_af_flr(vdev, pos);
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- default:
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- }
-
- if (ret < 0) {
- error_report("vfio: %s Error adding PCI capability "
- "0x%x[0x%x]@0x%x: %d", vdev->vbasedev.name,
- cap_id, size, pos, ret);
- return ret;
- }
-
- return 0;
-}
-
-static int vfio_add_capabilities(VFIOPCIDevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
-
- if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
- !pdev->config[PCI_CAPABILITY_LIST]) {
- return 0; /* Nothing to add */
- }
-
- return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
-}
-
-static void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint16_t cmd;
-
- vfio_disable_interrupts(vdev);
-
- /* Make sure the device is in D0 */
- if (vdev->pm_cap) {
- uint16_t pmcsr;
- uint8_t state;
-
- pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
- state = pmcsr & PCI_PM_CTRL_STATE_MASK;
- if (state) {
- pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
- vfio_pci_write_config(pdev, vdev->pm_cap + PCI_PM_CTRL, pmcsr, 2);
- /* vfio handles the necessary delay here */
- pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
- state = pmcsr & PCI_PM_CTRL_STATE_MASK;
- if (state) {
- error_report("vfio: Unable to power on device, stuck in D%d",
- state);
- }
- }
- }
-
- /*
- * Stop any ongoing DMA by disconecting I/O, MMIO, and bus master.
- * Also put INTx Disable in known state.
- */
- cmd = vfio_pci_read_config(pdev, PCI_COMMAND, 2);
- cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
- PCI_COMMAND_INTX_DISABLE);
- vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
-}
-
-static void vfio_pci_post_reset(VFIOPCIDevice *vdev)
-{
- vfio_intx_enable(vdev);
-}
-
-static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name)
-{
- char tmp[13];
-
- sprintf(tmp, "%04x:%02x:%02x.%1x", addr->domain,
- addr->bus, addr->slot, addr->function);
-
- return (strcmp(tmp, name) == 0);
-}
-
-static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
-{
- VFIOGroup *group;
- struct vfio_pci_hot_reset_info *info;
- struct vfio_pci_dependent_device *devices;
- struct vfio_pci_hot_reset *reset;
- int32_t *fds;
- int ret, i, count;
- bool multi = false;
-
- trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
-
- vfio_pci_pre_reset(vdev);
- vdev->vbasedev.needs_reset = false;
-
- info = g_malloc0(sizeof(*info));
- info->argsz = sizeof(*info);
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
- if (ret && errno != ENOSPC) {
- ret = -errno;
- if (!vdev->has_pm_reset) {
- error_report("vfio: Cannot reset device %s, "
- "no available reset mechanism.", vdev->vbasedev.name);
- }
- goto out_single;
- }
-
- count = info->count;
- info = g_realloc(info, sizeof(*info) + (count * sizeof(*devices)));
- info->argsz = sizeof(*info) + (count * sizeof(*devices));
- devices = &info->devices[0];
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
- if (ret) {
- ret = -errno;
- error_report("vfio: hot reset info failed: %m");
- goto out_single;
- }
-
- trace_vfio_pci_hot_reset_has_dep_devices(vdev->vbasedev.name);
-
- /* Verify that we have all the groups required */
- for (i = 0; i < info->count; i++) {
- PCIHostDeviceAddress host;
- VFIOPCIDevice *tmp;
- VFIODevice *vbasedev_iter;
-
- host.domain = devices[i].segment;
- host.bus = devices[i].bus;
- host.slot = PCI_SLOT(devices[i].devfn);
- host.function = PCI_FUNC(devices[i].devfn);
-
- trace_vfio_pci_hot_reset_dep_devices(host.domain,
- host.bus, host.slot, host.function, devices[i].group_id);
-
- if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
- continue;
- }
-
- QLIST_FOREACH(group, &vfio_group_list, next) {
- if (group->groupid == devices[i].group_id) {
- break;
- }
- }
-
- if (!group) {
- if (!vdev->has_pm_reset) {
- error_report("vfio: Cannot reset device %s, "
- "depends on group %d which is not owned.",
- vdev->vbasedev.name, devices[i].group_id);
- }
- ret = -EPERM;
- goto out;
- }
-
- /* Prep dependent devices for reset and clear our marker. */
- QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
- if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
- continue;
- }
- tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
- if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
- if (single) {
- ret = -EINVAL;
- goto out_single;
- }
- vfio_pci_pre_reset(tmp);
- tmp->vbasedev.needs_reset = false;
- multi = true;
- break;
- }
- }
- }
-
- if (!single && !multi) {
- ret = -EINVAL;
- goto out_single;
- }
-
- /* Determine how many group fds need to be passed */
- count = 0;
- QLIST_FOREACH(group, &vfio_group_list, next) {
- for (i = 0; i < info->count; i++) {
- if (group->groupid == devices[i].group_id) {
- count++;
- break;
- }
- }
- }
-
- reset = g_malloc0(sizeof(*reset) + (count * sizeof(*fds)));
- reset->argsz = sizeof(*reset) + (count * sizeof(*fds));
- fds = &reset->group_fds[0];
-
- /* Fill in group fds */
- QLIST_FOREACH(group, &vfio_group_list, next) {
- for (i = 0; i < info->count; i++) {
- if (group->groupid == devices[i].group_id) {
- fds[reset->count++] = group->fd;
- break;
- }
- }
- }
-
- /* Bus reset! */
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_PCI_HOT_RESET, reset);
- g_free(reset);
-
- trace_vfio_pci_hot_reset_result(vdev->vbasedev.name,
- ret ? "%m" : "Success");
-
-out:
- /* Re-enable INTx on affected devices */
- for (i = 0; i < info->count; i++) {
- PCIHostDeviceAddress host;
- VFIOPCIDevice *tmp;
- VFIODevice *vbasedev_iter;
-
- host.domain = devices[i].segment;
- host.bus = devices[i].bus;
- host.slot = PCI_SLOT(devices[i].devfn);
- host.function = PCI_FUNC(devices[i].devfn);
-
- if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
- continue;
- }
-
- QLIST_FOREACH(group, &vfio_group_list, next) {
- if (group->groupid == devices[i].group_id) {
- break;
- }
- }
-
- if (!group) {
- break;
- }
-
- QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
- if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
- continue;
- }
- tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
- if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
- vfio_pci_post_reset(tmp);
- break;
- }
- }
- }
-out_single:
- vfio_pci_post_reset(vdev);
- g_free(info);
-
- return ret;
-}
-
-/*
- * We want to differentiate hot reset of mulitple in-use devices vs hot reset
- * of a single in-use device. VFIO_DEVICE_RESET will already handle the case
- * of doing hot resets when there is only a single device per bus. The in-use
- * here refers to how many VFIODevices are affected. A hot reset that affects
- * multiple devices, but only a single in-use device, means that we can call
- * it from our bus ->reset() callback since the extent is effectively a single
- * device. This allows us to make use of it in the hotplug path. When there
- * are multiple in-use devices, we can only trigger the hot reset during a
- * system reset and thus from our reset handler. We separate _one vs _multi
- * here so that we don't overlap and do a double reset on the system reset
- * path where both our reset handler and ->reset() callback are used. Calling
- * _one() will only do a hot reset for the one in-use devices case, calling
- * _multi() will do nothing if a _one() would have been sufficient.
- */
-static int vfio_pci_hot_reset_one(VFIOPCIDevice *vdev)
-{
- return vfio_pci_hot_reset(vdev, true);
-}
-
-static int vfio_pci_hot_reset_multi(VFIODevice *vbasedev)
-{
- VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
- return vfio_pci_hot_reset(vdev, false);
-}
-
-static void vfio_pci_compute_needs_reset(VFIODevice *vbasedev)
-{
- VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
- if (!vbasedev->reset_works || (!vdev->has_flr && vdev->has_pm_reset)) {
- vbasedev->needs_reset = true;
- }
-}
-
-static VFIODeviceOps vfio_pci_ops = {
- .vfio_compute_needs_reset = vfio_pci_compute_needs_reset,
- .vfio_hot_reset_multi = vfio_pci_hot_reset_multi,
- .vfio_eoi = vfio_intx_eoi,
-};
-
-int vfio_populate_vga(VFIOPCIDevice *vdev)
-{
- VFIODevice *vbasedev = &vdev->vbasedev;
- struct vfio_region_info *reg_info;
- int ret;
-
- if (vbasedev->num_regions > VFIO_PCI_VGA_REGION_INDEX) {
- ret = vfio_get_region_info(vbasedev,
- VFIO_PCI_VGA_REGION_INDEX, &reg_info);
- if (ret) {
- return ret;
- }
-
- if (!(reg_info->flags & VFIO_REGION_INFO_FLAG_READ) ||
- !(reg_info->flags & VFIO_REGION_INFO_FLAG_WRITE) ||
- reg_info->size < 0xbffff + 1) {
- error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
- (unsigned long)reg_info->flags,
- (unsigned long)reg_info->size);
- g_free(reg_info);
- return -EINVAL;
- }
-
- vdev->vga = g_new0(VFIOVGA, 1);
-
- vdev->vga->fd_offset = reg_info->offset;
- vdev->vga->fd = vdev->vbasedev.fd;
-
- g_free(reg_info);
-
- vdev->vga->region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE;
- vdev->vga->region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM;
- QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_MEM].quirks);
-
- vdev->vga->region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE;
- vdev->vga->region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO;
- QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_LO].quirks);
-
- vdev->vga->region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE;
- vdev->vga->region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI;
- QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].quirks);
- }
-
- return 0;
-}
-
-static int vfio_populate_device(VFIOPCIDevice *vdev)
-{
- VFIODevice *vbasedev = &vdev->vbasedev;
- struct vfio_region_info *reg_info;
- struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
- int i, ret = -1;
-
- /* Sanity check device */
- if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) {
- error_report("vfio: Um, this isn't a PCI device");
- goto error;
- }
-
- if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) {
- error_report("vfio: unexpected number of io regions %u",
- vbasedev->num_regions);
- goto error;
- }
-
- if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) {
- error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs);
- goto error;
- }
-
- for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
- char *name = g_strdup_printf("%s BAR %d", vbasedev->name, i);
-
- ret = vfio_region_setup(OBJECT(vdev), vbasedev,
- &vdev->bars[i].region, i, name);
- g_free(name);
-
- if (ret) {
- error_report("vfio: Error getting region %d info: %m", i);
- goto error;
- }
-
- QLIST_INIT(&vdev->bars[i].quirks);
- }
-
- ret = vfio_get_region_info(vbasedev,
- VFIO_PCI_CONFIG_REGION_INDEX, &reg_info);
- if (ret) {
- error_report("vfio: Error getting config info: %m");
- goto error;
- }
-
- trace_vfio_populate_device_config(vdev->vbasedev.name,
- (unsigned long)reg_info->size,
- (unsigned long)reg_info->offset,
- (unsigned long)reg_info->flags);
-
- vdev->config_size = reg_info->size;
- if (vdev->config_size == PCI_CONFIG_SPACE_SIZE) {
- vdev->pdev.cap_present &= ~QEMU_PCI_CAP_EXPRESS;
- }
- vdev->config_offset = reg_info->offset;
-
- g_free(reg_info);
-
- if (vdev->features & VFIO_FEATURE_ENABLE_VGA) {
- ret = vfio_populate_vga(vdev);
- if (ret) {
- error_report(
- "vfio: Device does not support requested feature x-vga");
- goto error;
- }
- }
-
- irq_info.index = VFIO_PCI_ERR_IRQ_INDEX;
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info);
- if (ret) {
- /* This can fail for an old kernel or legacy PCI dev */
- trace_vfio_populate_device_get_irq_info_failure();
- ret = 0;
- } else if (irq_info.count == 1) {
- vdev->pci_aer = true;
- } else {
- error_report("vfio: %s "
- "Could not enable error recovery for the device",
- vbasedev->name);
- }
-
-error:
- return ret;
-}
-
-static void vfio_put_device(VFIOPCIDevice *vdev)
-{
- g_free(vdev->vbasedev.name);
- g_free(vdev->msix);
-
- vfio_put_base_device(&vdev->vbasedev);
-}
-
-static void vfio_err_notifier_handler(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->err_notifier)) {
- return;
- }
-
- /*
- * TBD. Retrieve the error details and decide what action
- * needs to be taken. One of the actions could be to pass
- * the error to the guest and have the guest driver recover
- * from the error. This requires that PCIe capabilities be
- * exposed to the guest. For now, we just terminate the
- * guest to contain the error.
- */
-
- error_report("%s(%s) Unrecoverable error detected. Please collect any data possible and then kill the guest", __func__, vdev->vbasedev.name);
-
- vm_stop(RUN_STATE_INTERNAL_ERROR);
-}
-
-/*
- * Registers error notifier for devices supporting error recovery.
- * If we encounter a failure in this function, we report an error
- * and continue after disabling error recovery support for the
- * device.
- */
-static void vfio_register_err_notifier(VFIOPCIDevice *vdev)
-{
- int ret;
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!vdev->pci_aer) {
- return;
- }
-
- if (event_notifier_init(&vdev->err_notifier, 0)) {
- error_report("vfio: Unable to init event notifier for error detection");
- vdev->pci_aer = false;
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->err_notifier);
- qemu_set_fd_handler(*pfd, vfio_err_notifier_handler, NULL, vdev);
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- if (ret) {
- error_report("vfio: Failed to set up error notification");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->err_notifier);
- vdev->pci_aer = false;
- }
- g_free(irq_set);
-}
-
-static void vfio_unregister_err_notifier(VFIOPCIDevice *vdev)
-{
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
- int ret;
-
- if (!vdev->pci_aer) {
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
- *pfd = -1;
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- if (ret) {
- error_report("vfio: Failed to de-assign error fd: %m");
- }
- g_free(irq_set);
- qemu_set_fd_handler(event_notifier_get_fd(&vdev->err_notifier),
- NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->err_notifier);
-}
-
-static void vfio_req_notifier_handler(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->req_notifier)) {
- return;
- }
-
- qdev_unplug(&vdev->pdev.qdev, NULL);
-}
-
-static void vfio_register_req_notifier(VFIOPCIDevice *vdev)
-{
- struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info),
- .index = VFIO_PCI_REQ_IRQ_INDEX };
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!(vdev->features & VFIO_FEATURE_ENABLE_REQ)) {
- return;
- }
-
- if (ioctl(vdev->vbasedev.fd,
- VFIO_DEVICE_GET_IRQ_INFO, &irq_info) < 0 || irq_info.count < 1) {
- return;
- }
-
- if (event_notifier_init(&vdev->req_notifier, 0)) {
- error_report("vfio: Unable to init event notifier for device request");
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->req_notifier);
- qemu_set_fd_handler(*pfd, vfio_req_notifier_handler, NULL, vdev);
-
- if (ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
- error_report("vfio: Failed to set up device request notification");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->req_notifier);
- } else {
- vdev->req_enabled = true;
- }
-
- g_free(irq_set);
-}
-
-static void vfio_unregister_req_notifier(VFIOPCIDevice *vdev)
-{
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!vdev->req_enabled) {
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
- *pfd = -1;
-
- if (ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
- error_report("vfio: Failed to de-assign device request fd: %m");
- }
- g_free(irq_set);
- qemu_set_fd_handler(event_notifier_get_fd(&vdev->req_notifier),
- NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->req_notifier);
-
- vdev->req_enabled = false;
-}
-
-static int vfio_initfn(PCIDevice *pdev)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- VFIODevice *vbasedev_iter;
- VFIOGroup *group;
- char *tmp, group_path[PATH_MAX], *group_name;
- ssize_t len;
- struct stat st;
- int groupid;
- int ret;
-
- if (!vdev->vbasedev.sysfsdev) {
- vdev->vbasedev.sysfsdev =
- g_strdup_printf("/sys/bus/pci/devices/%04x:%02x:%02x.%01x",
- vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- }
-
- if (stat(vdev->vbasedev.sysfsdev, &st) < 0) {
- error_report("vfio: error: no such host device: %s",
- vdev->vbasedev.sysfsdev);
- return -errno;
- }
-
- vdev->vbasedev.name = g_strdup(basename(vdev->vbasedev.sysfsdev));
- vdev->vbasedev.ops = &vfio_pci_ops;
- vdev->vbasedev.type = VFIO_DEVICE_TYPE_PCI;
-
- tmp = g_strdup_printf("%s/iommu_group", vdev->vbasedev.sysfsdev);
- len = readlink(tmp, group_path, sizeof(group_path));
- g_free(tmp);
-
- if (len <= 0 || len >= sizeof(group_path)) {
- error_report("vfio: error no iommu_group for device");
- return len < 0 ? -errno : -ENAMETOOLONG;
- }
-
- group_path[len] = 0;
-
- group_name = basename(group_path);
- if (sscanf(group_name, "%d", &groupid) != 1) {
- error_report("vfio: error reading %s: %m", group_path);
- return -errno;
- }
-
- trace_vfio_initfn(vdev->vbasedev.name, groupid);
-
- group = vfio_get_group(groupid, pci_device_iommu_address_space(pdev));
- if (!group) {
- error_report("vfio: failed to get group %d", groupid);
- return -ENOENT;
- }
-
- QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
- if (strcmp(vbasedev_iter->name, vdev->vbasedev.name) == 0) {
- error_report("vfio: error: device %s is already attached",
- vdev->vbasedev.name);
- vfio_put_group(group);
- return -EBUSY;
- }
- }
-
- ret = vfio_get_device(group, vdev->vbasedev.name, &vdev->vbasedev);
- if (ret) {
- error_report("vfio: failed to get device %s", vdev->vbasedev.name);
- vfio_put_group(group);
- return ret;
- }
-
- ret = vfio_populate_device(vdev);
- if (ret) {
- return ret;
- }
-
- /* Get a copy of config space */
- ret = pread(vdev->vbasedev.fd, vdev->pdev.config,
- MIN(pci_config_size(&vdev->pdev), vdev->config_size),
- vdev->config_offset);
- if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
- ret = ret < 0 ? -errno : -EFAULT;
- error_report("vfio: Failed to read device config space");
- return ret;
- }
-
- /* vfio emulates a lot for us, but some bits need extra love */
- vdev->emulated_config_bits = g_malloc0(vdev->config_size);
-
- /* QEMU can choose to expose the ROM or not */
- memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4);
-
- /*
- * The PCI spec reserves vendor ID 0xffff as an invalid value. The
- * device ID is managed by the vendor and need only be a 16-bit value.
- * Allow any 16-bit value for subsystem so they can be hidden or changed.
- */
- if (vdev->vendor_id != PCI_ANY_ID) {
- if (vdev->vendor_id >= 0xffff) {
- error_report("vfio: Invalid PCI vendor ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_VENDOR_ID, vdev->vendor_id, ~0);
- trace_vfio_pci_emulated_vendor_id(vdev->vbasedev.name, vdev->vendor_id);
- } else {
- vdev->vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
- }
-
- if (vdev->device_id != PCI_ANY_ID) {
- if (vdev->device_id > 0xffff) {
- error_report("vfio: Invalid PCI device ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_DEVICE_ID, vdev->device_id, ~0);
- trace_vfio_pci_emulated_device_id(vdev->vbasedev.name, vdev->device_id);
- } else {
- vdev->device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
- }
-
- if (vdev->sub_vendor_id != PCI_ANY_ID) {
- if (vdev->sub_vendor_id > 0xffff) {
- error_report("vfio: Invalid PCI subsystem vendor ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_VENDOR_ID,
- vdev->sub_vendor_id, ~0);
- trace_vfio_pci_emulated_sub_vendor_id(vdev->vbasedev.name,
- vdev->sub_vendor_id);
- }
-
- if (vdev->sub_device_id != PCI_ANY_ID) {
- if (vdev->sub_device_id > 0xffff) {
- error_report("vfio: Invalid PCI subsystem device ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_ID, vdev->sub_device_id, ~0);
- trace_vfio_pci_emulated_sub_device_id(vdev->vbasedev.name,
- vdev->sub_device_id);
- }
-
- /* QEMU can change multi-function devices to single function, or reverse */
- vdev->emulated_config_bits[PCI_HEADER_TYPE] =
- PCI_HEADER_TYPE_MULTI_FUNCTION;
-
- /* Restore or clear multifunction, this is always controlled by QEMU */
- if (vdev->pdev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
- vdev->pdev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
- } else {
- vdev->pdev.config[PCI_HEADER_TYPE] &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
- }
-
- /*
- * Clear host resource mapping info. If we choose not to register a
- * BAR, such as might be the case with the option ROM, we can get
- * confusing, unwritable, residual addresses from the host here.
- */
- memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
- memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
-
- vfio_pci_size_rom(vdev);
-
- ret = vfio_msix_early_setup(vdev);
- if (ret) {
- return ret;
- }
-
- vfio_bars_setup(vdev);
-
- ret = vfio_add_capabilities(vdev);
- if (ret) {
- goto out_teardown;
- }
-
- /* QEMU emulates all of MSI & MSIX */
- if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
- memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
- MSIX_CAP_LENGTH);
- }
-
- if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
- memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
- vdev->msi_cap_size);
- }
-
- if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
- vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
- vfio_intx_mmap_enable, vdev);
- pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_intx_update);
- ret = vfio_intx_enable(vdev);
- if (ret) {
- goto out_teardown;
- }
- }
-
- vfio_register_err_notifier(vdev);
- vfio_register_req_notifier(vdev);
- vfio_setup_resetfn_quirk(vdev);
-
- return 0;
-
-out_teardown:
- pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
- vfio_teardown_msi(vdev);
- vfio_bars_exit(vdev);
- return ret;
-}
-
-static void vfio_instance_finalize(Object *obj)
-{
- PCIDevice *pci_dev = PCI_DEVICE(obj);
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pci_dev);
- VFIOGroup *group = vdev->vbasedev.group;
-
- vfio_bars_finalize(vdev);
- g_free(vdev->emulated_config_bits);
- g_free(vdev->rom);
- vfio_put_device(vdev);
- vfio_put_group(group);
-}
-
-static void vfio_exitfn(PCIDevice *pdev)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
-
- vfio_unregister_req_notifier(vdev);
- vfio_unregister_err_notifier(vdev);
- pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
- vfio_disable_interrupts(vdev);
- if (vdev->intx.mmap_timer) {
- timer_free(vdev->intx.mmap_timer);
- }
- vfio_teardown_msi(vdev);
- vfio_bars_exit(vdev);
-}
-
-static void vfio_pci_reset(DeviceState *dev)
-{
- PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev);
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
-
- trace_vfio_pci_reset(vdev->vbasedev.name);
-
- vfio_pci_pre_reset(vdev);
-
- if (vdev->resetfn && !vdev->resetfn(vdev)) {
- goto post_reset;
- }
-
- if (vdev->vbasedev.reset_works &&
- (vdev->has_flr || !vdev->has_pm_reset) &&
- !ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {
- trace_vfio_pci_reset_flr(vdev->vbasedev.name);
- goto post_reset;
- }
-
- /* See if we can do our own bus reset */
- if (!vfio_pci_hot_reset_one(vdev)) {
- goto post_reset;
- }
-
- /* If nothing else works and the device supports PM reset, use it */
- if (vdev->vbasedev.reset_works && vdev->has_pm_reset &&
- !ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {
- trace_vfio_pci_reset_pm(vdev->vbasedev.name);
- goto post_reset;
- }
-
-post_reset:
- vfio_pci_post_reset(vdev);
-}
-
-static void vfio_instance_init(Object *obj)
-{
- PCIDevice *pci_dev = PCI_DEVICE(obj);
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, PCI_DEVICE(obj));
-
- device_add_bootindex_property(obj, &vdev->bootindex,
- "bootindex", NULL,
- &pci_dev->qdev, NULL);
-}
-
-static Property vfio_pci_dev_properties[] = {
- DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIOPCIDevice, host),
- DEFINE_PROP_STRING("sysfsdev", VFIOPCIDevice, vbasedev.sysfsdev),
- DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIOPCIDevice,
- intx.mmap_timeout, 1100),
- DEFINE_PROP_BIT("x-vga", VFIOPCIDevice, features,
- VFIO_FEATURE_ENABLE_VGA_BIT, false),
- DEFINE_PROP_BIT("x-req", VFIOPCIDevice, features,
- VFIO_FEATURE_ENABLE_REQ_BIT, true),
- DEFINE_PROP_BOOL("x-no-mmap", VFIOPCIDevice, vbasedev.no_mmap, false),
- DEFINE_PROP_BOOL("x-no-kvm-intx", VFIOPCIDevice, no_kvm_intx, false),
- DEFINE_PROP_BOOL("x-no-kvm-msi", VFIOPCIDevice, no_kvm_msi, false),
- DEFINE_PROP_BOOL("x-no-kvm-msix", VFIOPCIDevice, no_kvm_msix, false),
- DEFINE_PROP_UINT32("x-pci-vendor-id", VFIOPCIDevice, vendor_id, PCI_ANY_ID),
- DEFINE_PROP_UINT32("x-pci-device-id", VFIOPCIDevice, device_id, PCI_ANY_ID),
- DEFINE_PROP_UINT32("x-pci-sub-vendor-id", VFIOPCIDevice,
- sub_vendor_id, PCI_ANY_ID),
- DEFINE_PROP_UINT32("x-pci-sub-device-id", VFIOPCIDevice,
- sub_device_id, PCI_ANY_ID),
- /*
- * TODO - support passed fds... is this necessary?
- * DEFINE_PROP_STRING("vfiofd", VFIOPCIDevice, vfiofd_name),
- * DEFINE_PROP_STRING("vfiogroupfd, VFIOPCIDevice, vfiogroupfd_name),
- */
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static const VMStateDescription vfio_pci_vmstate = {
- .name = "vfio-pci",
- .unmigratable = 1,
-};
-
-static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
-
- dc->reset = vfio_pci_reset;
- dc->props = vfio_pci_dev_properties;
- dc->vmsd = &vfio_pci_vmstate;
- dc->desc = "VFIO-based PCI device assignment";
- set_bit(DEVICE_CATEGORY_MISC, dc->categories);
- pdc->init = vfio_initfn;
- pdc->exit = vfio_exitfn;
- pdc->config_read = vfio_pci_read_config;
- pdc->config_write = vfio_pci_write_config;
- pdc->is_express = 1; /* We might be */
-}
-
-static const TypeInfo vfio_pci_dev_info = {
- .name = "vfio-pci",
- .parent = TYPE_PCI_DEVICE,
- .instance_size = sizeof(VFIOPCIDevice),
- .class_init = vfio_pci_dev_class_init,
- .instance_init = vfio_instance_init,
- .instance_finalize = vfio_instance_finalize,
-};
-
-static void register_vfio_pci_dev_type(void)
-{
- type_register_static(&vfio_pci_dev_info);
-}
-
-type_init(register_vfio_pci_dev_type)
diff --git a/qemu/hw/vfio/pci.h b/qemu/hw/vfio/pci.h
deleted file mode 100644
index 3976f6854..000000000
--- a/qemu/hw/vfio/pci.h
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
- * vfio based device assignment support - PCI devices
- *
- * Copyright Red Hat, Inc. 2012-2015
- *
- * Authors:
- * Alex Williamson <alex.williamson@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- */
-#ifndef HW_VFIO_VFIO_PCI_H
-#define HW_VFIO_VFIO_PCI_H
-
-#include "qemu-common.h"
-#include "exec/memory.h"
-#include "hw/pci/pci.h"
-#include "hw/vfio/vfio-common.h"
-#include "qemu/event_notifier.h"
-#include "qemu/queue.h"
-#include "qemu/timer.h"
-
-#define PCI_ANY_ID (~0)
-
-struct VFIOPCIDevice;
-
-typedef struct VFIOQuirk {
- QLIST_ENTRY(VFIOQuirk) next;
- void *data;
- int nr_mem;
- MemoryRegion *mem;
-} VFIOQuirk;
-
-typedef struct VFIOBAR {
- VFIORegion region;
- bool ioport;
- bool mem64;
- QLIST_HEAD(, VFIOQuirk) quirks;
-} VFIOBAR;
-
-typedef struct VFIOVGARegion {
- MemoryRegion mem;
- off_t offset;
- int nr;
- QLIST_HEAD(, VFIOQuirk) quirks;
-} VFIOVGARegion;
-
-typedef struct VFIOVGA {
- off_t fd_offset;
- int fd;
- VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS];
-} VFIOVGA;
-
-typedef struct VFIOINTx {
- bool pending; /* interrupt pending */
- bool kvm_accel; /* set when QEMU bypass through KVM enabled */
- uint8_t pin; /* which pin to pull for qemu_set_irq */
- EventNotifier interrupt; /* eventfd triggered on interrupt */
- EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
- PCIINTxRoute route; /* routing info for QEMU bypass */
- uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
- QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */
-} VFIOINTx;
-
-typedef struct VFIOMSIVector {
- /*
- * Two interrupt paths are configured per vector. The first, is only used
- * for interrupts injected via QEMU. This is typically the non-accel path,
- * but may also be used when we want QEMU to handle masking and pending
- * bits. The KVM path bypasses QEMU and is therefore higher performance,
- * but requires masking at the device. virq is used to track the MSI route
- * through KVM, thus kvm_interrupt is only available when virq is set to a
- * valid (>= 0) value.
- */
- EventNotifier interrupt;
- EventNotifier kvm_interrupt;
- struct VFIOPCIDevice *vdev; /* back pointer to device */
- int virq;
- bool use;
-} VFIOMSIVector;
-
-enum {
- VFIO_INT_NONE = 0,
- VFIO_INT_INTx = 1,
- VFIO_INT_MSI = 2,
- VFIO_INT_MSIX = 3,
-};
-
-/* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
-typedef struct VFIOMSIXInfo {
- uint8_t table_bar;
- uint8_t pba_bar;
- uint16_t entries;
- uint32_t table_offset;
- uint32_t pba_offset;
- MemoryRegion mmap_mem;
- void *mmap;
- unsigned long *pending;
-} VFIOMSIXInfo;
-
-typedef struct VFIOPCIDevice {
- PCIDevice pdev;
- VFIODevice vbasedev;
- VFIOINTx intx;
- unsigned int config_size;
- uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */
- off_t config_offset; /* Offset of config space region within device fd */
- unsigned int rom_size;
- off_t rom_offset; /* Offset of ROM region within device fd */
- void *rom;
- int msi_cap_size;
- VFIOMSIVector *msi_vectors;
- VFIOMSIXInfo *msix;
- int nr_vectors; /* Number of MSI/MSIX vectors currently in use */
- int interrupt; /* Current interrupt type */
- VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */
- VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */
- PCIHostDeviceAddress host;
- EventNotifier err_notifier;
- EventNotifier req_notifier;
- int (*resetfn)(struct VFIOPCIDevice *);
- uint32_t vendor_id;
- uint32_t device_id;
- uint32_t sub_vendor_id;
- uint32_t sub_device_id;
- uint32_t features;
-#define VFIO_FEATURE_ENABLE_VGA_BIT 0
-#define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
-#define VFIO_FEATURE_ENABLE_REQ_BIT 1
-#define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT)
- int32_t bootindex;
- uint8_t pm_cap;
- bool has_vga;
- bool pci_aer;
- bool req_enabled;
- bool has_flr;
- bool has_pm_reset;
- bool rom_read_failed;
- bool no_kvm_intx;
- bool no_kvm_msi;
- bool no_kvm_msix;
-} VFIOPCIDevice;
-
-uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
-void vfio_pci_write_config(PCIDevice *pdev,
- uint32_t addr, uint32_t val, int len);
-
-uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size);
-void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size);
-
-bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev);
-void vfio_vga_quirk_setup(VFIOPCIDevice *vdev);
-void vfio_vga_quirk_exit(VFIOPCIDevice *vdev);
-void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev);
-void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr);
-void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr);
-void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr);
-void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev);
-
-int vfio_populate_vga(VFIOPCIDevice *vdev);
-
-#endif /* HW_VFIO_VFIO_PCI_H */
diff --git a/qemu/hw/vfio/platform.c b/qemu/hw/vfio/platform.c
deleted file mode 100644
index 1798a00a3..000000000
--- a/qemu/hw/vfio/platform.c
+++ /dev/null
@@ -1,705 +0,0 @@
-/*
- * vfio based device assignment support - platform devices
- *
- * Copyright Linaro Limited, 2014
- *
- * Authors:
- * Kim Phillips <kim.phillips@linaro.org>
- * Eric Auger <eric.auger@linaro.org>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Based on vfio based PCI device assignment support:
- * Copyright Red Hat, Inc. 2012
- */
-
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include <sys/ioctl.h>
-#include <linux/vfio.h>
-
-#include "hw/vfio/vfio-platform.h"
-#include "qemu/error-report.h"
-#include "qemu/range.h"
-#include "sysemu/sysemu.h"
-#include "exec/memory.h"
-#include "qemu/queue.h"
-#include "hw/sysbus.h"
-#include "trace.h"
-#include "hw/platform-bus.h"
-#include "sysemu/kvm.h"
-
-/*
- * Functions used whatever the injection method
- */
-
-static inline bool vfio_irq_is_automasked(VFIOINTp *intp)
-{
- return intp->flags & VFIO_IRQ_INFO_AUTOMASKED;
-}
-
-/**
- * vfio_init_intp - allocate, initialize the IRQ struct pointer
- * and add it into the list of IRQs
- * @vbasedev: the VFIO device handle
- * @info: irq info struct retrieved from VFIO driver
- */
-static VFIOINTp *vfio_init_intp(VFIODevice *vbasedev,
- struct vfio_irq_info info)
-{
- int ret;
- VFIOPlatformDevice *vdev =
- container_of(vbasedev, VFIOPlatformDevice, vbasedev);
- SysBusDevice *sbdev = SYS_BUS_DEVICE(vdev);
- VFIOINTp *intp;
-
- intp = g_malloc0(sizeof(*intp));
- intp->vdev = vdev;
- intp->pin = info.index;
- intp->flags = info.flags;
- intp->state = VFIO_IRQ_INACTIVE;
- intp->kvm_accel = false;
-
- sysbus_init_irq(sbdev, &intp->qemuirq);
-
- /* Get an eventfd for trigger */
- intp->interrupt = g_malloc0(sizeof(EventNotifier));
- ret = event_notifier_init(intp->interrupt, 0);
- if (ret) {
- g_free(intp->interrupt);
- g_free(intp);
- error_report("vfio: Error: trigger event_notifier_init failed ");
- return NULL;
- }
- if (vfio_irq_is_automasked(intp)) {
- /* Get an eventfd for resample/unmask */
- intp->unmask = g_malloc0(sizeof(EventNotifier));
- ret = event_notifier_init(intp->unmask, 0);
- if (ret) {
- g_free(intp->interrupt);
- g_free(intp->unmask);
- g_free(intp);
- error_report("vfio: Error: resamplefd event_notifier_init failed");
- return NULL;
- }
- }
-
- QLIST_INSERT_HEAD(&vdev->intp_list, intp, next);
- return intp;
-}
-
-/**
- * vfio_set_trigger_eventfd - set VFIO eventfd handling
- *
- * @intp: IRQ struct handle
- * @handler: handler to be called on eventfd signaling
- *
- * Setup VFIO signaling and attach an optional user-side handler
- * to the eventfd
- */
-static int vfio_set_trigger_eventfd(VFIOINTp *intp,
- eventfd_user_side_handler_t handler)
-{
- VFIODevice *vbasedev = &intp->vdev->vbasedev;
- struct vfio_irq_set *irq_set;
- int argsz, ret;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = intp->pin;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
- *pfd = event_notifier_get_fd(intp->interrupt);
- qemu_set_fd_handler(*pfd, (IOHandler *)handler, NULL, intp);
- ret = ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret < 0) {
- error_report("vfio: Failed to set trigger eventfd: %m");
- qemu_set_fd_handler(*pfd, NULL, NULL, NULL);
- }
- return ret;
-}
-
-/*
- * Functions only used when eventfds are handled on user-side
- * ie. without irqfd
- */
-
-/**
- * vfio_mmap_set_enabled - enable/disable the fast path mode
- * @vdev: the VFIO platform device
- * @enabled: the target mmap state
- *
- * enabled = true ~ fast path = MMIO region is mmaped (no KVM TRAP);
- * enabled = false ~ slow path = MMIO region is trapped and region callbacks
- * are called; slow path enables to trap the device IRQ status register reset
-*/
-
-static void vfio_mmap_set_enabled(VFIOPlatformDevice *vdev, bool enabled)
-{
- int i;
-
- for (i = 0; i < vdev->vbasedev.num_regions; i++) {
- vfio_region_mmaps_set_enabled(vdev->regions[i], enabled);
- }
-}
-
-/**
- * vfio_intp_mmap_enable - timer function, restores the fast path
- * if there is no more active IRQ
- * @opaque: actually points to the VFIO platform device
- *
- * Called on mmap timer timout, this function checks whether the
- * IRQ is still active and if not, restores the fast path.
- * by construction a single eventfd is handled at a time.
- * if the IRQ is still active, the timer is re-programmed.
- */
-static void vfio_intp_mmap_enable(void *opaque)
-{
- VFIOINTp *tmp;
- VFIOPlatformDevice *vdev = (VFIOPlatformDevice *)opaque;
-
- qemu_mutex_lock(&vdev->intp_mutex);
- QLIST_FOREACH(tmp, &vdev->intp_list, next) {
- if (tmp->state == VFIO_IRQ_ACTIVE) {
- trace_vfio_platform_intp_mmap_enable(tmp->pin);
- /* re-program the timer to check active status later */
- timer_mod(vdev->mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
- vdev->mmap_timeout);
- qemu_mutex_unlock(&vdev->intp_mutex);
- return;
- }
- }
- vfio_mmap_set_enabled(vdev, true);
- qemu_mutex_unlock(&vdev->intp_mutex);
-}
-
-/**
- * vfio_intp_inject_pending_lockheld - Injects a pending IRQ
- * @opaque: opaque pointer, in practice the VFIOINTp handle
- *
- * The function is called on a previous IRQ completion, from
- * vfio_platform_eoi, while the intp_mutex is locked.
- * Also in such situation, the slow path already is set and
- * the mmap timer was already programmed.
- */
-static void vfio_intp_inject_pending_lockheld(VFIOINTp *intp)
-{
- trace_vfio_platform_intp_inject_pending_lockheld(intp->pin,
- event_notifier_get_fd(intp->interrupt));
-
- intp->state = VFIO_IRQ_ACTIVE;
-
- /* trigger the virtual IRQ */
- qemu_set_irq(intp->qemuirq, 1);
-}
-
-/**
- * vfio_intp_interrupt - The user-side eventfd handler
- * @opaque: opaque pointer which in practice is the VFIOINTp handle
- *
- * the function is entered in event handler context:
- * the vIRQ is injected into the guest if there is no other active
- * or pending IRQ.
- */
-static void vfio_intp_interrupt(VFIOINTp *intp)
-{
- int ret;
- VFIOINTp *tmp;
- VFIOPlatformDevice *vdev = intp->vdev;
- bool delay_handling = false;
-
- qemu_mutex_lock(&vdev->intp_mutex);
- if (intp->state == VFIO_IRQ_INACTIVE) {
- QLIST_FOREACH(tmp, &vdev->intp_list, next) {
- if (tmp->state == VFIO_IRQ_ACTIVE ||
- tmp->state == VFIO_IRQ_PENDING) {
- delay_handling = true;
- break;
- }
- }
- }
- if (delay_handling) {
- /*
- * the new IRQ gets a pending status and is pushed in
- * the pending queue
- */
- intp->state = VFIO_IRQ_PENDING;
- trace_vfio_intp_interrupt_set_pending(intp->pin);
- QSIMPLEQ_INSERT_TAIL(&vdev->pending_intp_queue,
- intp, pqnext);
- ret = event_notifier_test_and_clear(intp->interrupt);
- qemu_mutex_unlock(&vdev->intp_mutex);
- return;
- }
-
- trace_vfio_platform_intp_interrupt(intp->pin,
- event_notifier_get_fd(intp->interrupt));
-
- ret = event_notifier_test_and_clear(intp->interrupt);
- if (!ret) {
- error_report("Error when clearing fd=%d (ret = %d)",
- event_notifier_get_fd(intp->interrupt), ret);
- }
-
- intp->state = VFIO_IRQ_ACTIVE;
-
- /* sets slow path */
- vfio_mmap_set_enabled(vdev, false);
-
- /* trigger the virtual IRQ */
- qemu_set_irq(intp->qemuirq, 1);
-
- /*
- * Schedule the mmap timer which will restore fastpath when no IRQ
- * is active anymore
- */
- if (vdev->mmap_timeout) {
- timer_mod(vdev->mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
- vdev->mmap_timeout);
- }
- qemu_mutex_unlock(&vdev->intp_mutex);
-}
-
-/**
- * vfio_platform_eoi - IRQ completion routine
- * @vbasedev: the VFIO device handle
- *
- * De-asserts the active virtual IRQ and unmasks the physical IRQ
- * (effective for level sensitive IRQ auto-masked by the VFIO driver).
- * Then it handles next pending IRQ if any.
- * eoi function is called on the first access to any MMIO region
- * after an IRQ was triggered, trapped since slow path was set.
- * It is assumed this access corresponds to the IRQ status
- * register reset. With such a mechanism, a single IRQ can be
- * handled at a time since there is no way to know which IRQ
- * was completed by the guest (we would need additional details
- * about the IRQ status register mask).
- */
-static void vfio_platform_eoi(VFIODevice *vbasedev)
-{
- VFIOINTp *intp;
- VFIOPlatformDevice *vdev =
- container_of(vbasedev, VFIOPlatformDevice, vbasedev);
-
- qemu_mutex_lock(&vdev->intp_mutex);
- QLIST_FOREACH(intp, &vdev->intp_list, next) {
- if (intp->state == VFIO_IRQ_ACTIVE) {
- trace_vfio_platform_eoi(intp->pin,
- event_notifier_get_fd(intp->interrupt));
- intp->state = VFIO_IRQ_INACTIVE;
-
- /* deassert the virtual IRQ */
- qemu_set_irq(intp->qemuirq, 0);
-
- if (vfio_irq_is_automasked(intp)) {
- /* unmasks the physical level-sensitive IRQ */
- vfio_unmask_single_irqindex(vbasedev, intp->pin);
- }
-
- /* a single IRQ can be active at a time */
- break;
- }
- }
- /* in case there are pending IRQs, handle the first one */
- if (!QSIMPLEQ_EMPTY(&vdev->pending_intp_queue)) {
- intp = QSIMPLEQ_FIRST(&vdev->pending_intp_queue);
- vfio_intp_inject_pending_lockheld(intp);
- QSIMPLEQ_REMOVE_HEAD(&vdev->pending_intp_queue, pqnext);
- }
- qemu_mutex_unlock(&vdev->intp_mutex);
-}
-
-/**
- * vfio_start_eventfd_injection - starts the virtual IRQ injection using
- * user-side handled eventfds
- * @sbdev: the sysbus device handle
- * @irq: the qemu irq handle
- */
-
-static void vfio_start_eventfd_injection(SysBusDevice *sbdev, qemu_irq irq)
-{
- int ret;
- VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev);
- VFIOINTp *intp;
-
- QLIST_FOREACH(intp, &vdev->intp_list, next) {
- if (intp->qemuirq == irq) {
- break;
- }
- }
- assert(intp);
-
- ret = vfio_set_trigger_eventfd(intp, vfio_intp_interrupt);
- if (ret) {
- error_report("vfio: failed to start eventfd signaling for IRQ %d: %m",
- intp->pin);
- abort();
- }
-}
-
-/*
- * Functions used for irqfd
- */
-
-/**
- * vfio_set_resample_eventfd - sets the resamplefd for an IRQ
- * @intp: the IRQ struct handle
- * programs the VFIO driver to unmask this IRQ when the
- * intp->unmask eventfd is triggered
- */
-static int vfio_set_resample_eventfd(VFIOINTp *intp)
-{
- VFIODevice *vbasedev = &intp->vdev->vbasedev;
- struct vfio_irq_set *irq_set;
- int argsz, ret;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK;
- irq_set->index = intp->pin;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
- *pfd = event_notifier_get_fd(intp->unmask);
- qemu_set_fd_handler(*pfd, NULL, NULL, NULL);
- ret = ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret < 0) {
- error_report("vfio: Failed to set resample eventfd: %m");
- }
- return ret;
-}
-
-/**
- * vfio_start_irqfd_injection - starts the virtual IRQ injection using
- * irqfd
- *
- * @sbdev: the sysbus device handle
- * @irq: the qemu irq handle
- *
- * In case the irqfd setup fails, we fallback to userspace handled eventfd
- */
-static void vfio_start_irqfd_injection(SysBusDevice *sbdev, qemu_irq irq)
-{
- VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev);
- VFIOINTp *intp;
-
- if (!kvm_irqfds_enabled() || !kvm_resamplefds_enabled() ||
- !vdev->irqfd_allowed) {
- goto fail_irqfd;
- }
-
- QLIST_FOREACH(intp, &vdev->intp_list, next) {
- if (intp->qemuirq == irq) {
- break;
- }
- }
- assert(intp);
-
- if (kvm_irqchip_add_irqfd_notifier(kvm_state, intp->interrupt,
- intp->unmask, irq) < 0) {
- goto fail_irqfd;
- }
-
- if (vfio_set_trigger_eventfd(intp, NULL) < 0) {
- goto fail_vfio;
- }
- if (vfio_irq_is_automasked(intp)) {
- if (vfio_set_resample_eventfd(intp) < 0) {
- goto fail_vfio;
- }
- trace_vfio_platform_start_level_irqfd_injection(intp->pin,
- event_notifier_get_fd(intp->interrupt),
- event_notifier_get_fd(intp->unmask));
- } else {
- trace_vfio_platform_start_edge_irqfd_injection(intp->pin,
- event_notifier_get_fd(intp->interrupt));
- }
-
- intp->kvm_accel = true;
-
- return;
-fail_vfio:
- kvm_irqchip_remove_irqfd_notifier(kvm_state, intp->interrupt, irq);
- error_report("vfio: failed to start eventfd signaling for IRQ %d: %m",
- intp->pin);
- abort();
-fail_irqfd:
- vfio_start_eventfd_injection(sbdev, irq);
- return;
-}
-
-/* VFIO skeleton */
-
-static void vfio_platform_compute_needs_reset(VFIODevice *vbasedev)
-{
- vbasedev->needs_reset = true;
-}
-
-/* not implemented yet */
-static int vfio_platform_hot_reset_multi(VFIODevice *vbasedev)
-{
- return -1;
-}
-
-/**
- * vfio_populate_device - Allocate and populate MMIO region
- * and IRQ structs according to driver returned information
- * @vbasedev: the VFIO device handle
- *
- */
-static int vfio_populate_device(VFIODevice *vbasedev)
-{
- VFIOINTp *intp, *tmp;
- int i, ret = -1;
- VFIOPlatformDevice *vdev =
- container_of(vbasedev, VFIOPlatformDevice, vbasedev);
-
- if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PLATFORM)) {
- error_report("vfio: Um, this isn't a platform device");
- return ret;
- }
-
- vdev->regions = g_new0(VFIORegion *, vbasedev->num_regions);
-
- for (i = 0; i < vbasedev->num_regions; i++) {
- char *name = g_strdup_printf("VFIO %s region %d\n", vbasedev->name, i);
-
- vdev->regions[i] = g_new0(VFIORegion, 1);
- ret = vfio_region_setup(OBJECT(vdev), vbasedev,
- vdev->regions[i], i, name);
- g_free(name);
- if (ret) {
- error_report("vfio: Error getting region %d info: %m", i);
- goto reg_error;
- }
- }
-
- vdev->mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
- vfio_intp_mmap_enable, vdev);
-
- QSIMPLEQ_INIT(&vdev->pending_intp_queue);
-
- for (i = 0; i < vbasedev->num_irqs; i++) {
- struct vfio_irq_info irq = { .argsz = sizeof(irq) };
-
- irq.index = i;
- ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_IRQ_INFO, &irq);
- if (ret) {
- error_printf("vfio: error getting device %s irq info",
- vbasedev->name);
- goto irq_err;
- } else {
- trace_vfio_platform_populate_interrupts(irq.index,
- irq.count,
- irq.flags);
- intp = vfio_init_intp(vbasedev, irq);
- if (!intp) {
- error_report("vfio: Error installing IRQ %d up", i);
- goto irq_err;
- }
- }
- }
- return 0;
-irq_err:
- timer_del(vdev->mmap_timer);
- QLIST_FOREACH_SAFE(intp, &vdev->intp_list, next, tmp) {
- QLIST_REMOVE(intp, next);
- g_free(intp);
- }
-reg_error:
- for (i = 0; i < vbasedev->num_regions; i++) {
- if (vdev->regions[i]) {
- vfio_region_finalize(vdev->regions[i]);
- }
- g_free(vdev->regions[i]);
- }
- g_free(vdev->regions);
- return ret;
-}
-
-/* specialized functions for VFIO Platform devices */
-static VFIODeviceOps vfio_platform_ops = {
- .vfio_compute_needs_reset = vfio_platform_compute_needs_reset,
- .vfio_hot_reset_multi = vfio_platform_hot_reset_multi,
- .vfio_eoi = vfio_platform_eoi,
-};
-
-/**
- * vfio_base_device_init - perform preliminary VFIO setup
- * @vbasedev: the VFIO device handle
- *
- * Implement the VFIO command sequence that allows to discover
- * assigned device resources: group extraction, device
- * fd retrieval, resource query.
- * Precondition: the device name must be initialized
- */
-static int vfio_base_device_init(VFIODevice *vbasedev)
-{
- VFIOGroup *group;
- VFIODevice *vbasedev_iter;
- char *tmp, group_path[PATH_MAX], *group_name;
- ssize_t len;
- struct stat st;
- int groupid;
- int ret;
-
- /* @sysfsdev takes precedence over @host */
- if (vbasedev->sysfsdev) {
- g_free(vbasedev->name);
- vbasedev->name = g_strdup(basename(vbasedev->sysfsdev));
- } else {
- if (!vbasedev->name || strchr(vbasedev->name, '/')) {
- return -EINVAL;
- }
-
- vbasedev->sysfsdev = g_strdup_printf("/sys/bus/platform/devices/%s",
- vbasedev->name);
- }
-
- if (stat(vbasedev->sysfsdev, &st) < 0) {
- error_report("vfio: error: no such host device: %s",
- vbasedev->sysfsdev);
- return -errno;
- }
-
- tmp = g_strdup_printf("%s/iommu_group", vbasedev->sysfsdev);
- len = readlink(tmp, group_path, sizeof(group_path));
- g_free(tmp);
-
- if (len < 0 || len >= sizeof(group_path)) {
- error_report("vfio: error no iommu_group for device");
- return len < 0 ? -errno : -ENAMETOOLONG;
- }
-
- group_path[len] = 0;
-
- group_name = basename(group_path);
- if (sscanf(group_name, "%d", &groupid) != 1) {
- error_report("vfio: error reading %s: %m", group_path);
- return -errno;
- }
-
- trace_vfio_platform_base_device_init(vbasedev->name, groupid);
-
- group = vfio_get_group(groupid, &address_space_memory);
- if (!group) {
- error_report("vfio: failed to get group %d", groupid);
- return -ENOENT;
- }
-
- QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
- if (strcmp(vbasedev_iter->name, vbasedev->name) == 0) {
- error_report("vfio: error: device %s is already attached",
- vbasedev->name);
- vfio_put_group(group);
- return -EBUSY;
- }
- }
- ret = vfio_get_device(group, vbasedev->name, vbasedev);
- if (ret) {
- error_report("vfio: failed to get device %s", vbasedev->name);
- vfio_put_group(group);
- return ret;
- }
-
- ret = vfio_populate_device(vbasedev);
- if (ret) {
- error_report("vfio: failed to populate device %s", vbasedev->name);
- vfio_put_group(group);
- }
-
- return ret;
-}
-
-/**
- * vfio_platform_realize - the device realize function
- * @dev: device state pointer
- * @errp: error
- *
- * initialize the device, its memory regions and IRQ structures
- * IRQ are started separately
- */
-static void vfio_platform_realize(DeviceState *dev, Error **errp)
-{
- VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(dev);
- SysBusDevice *sbdev = SYS_BUS_DEVICE(dev);
- VFIODevice *vbasedev = &vdev->vbasedev;
- int i, ret;
-
- vbasedev->type = VFIO_DEVICE_TYPE_PLATFORM;
- vbasedev->ops = &vfio_platform_ops;
-
- trace_vfio_platform_realize(vbasedev->sysfsdev ?
- vbasedev->sysfsdev : vbasedev->name,
- vdev->compat);
-
- ret = vfio_base_device_init(vbasedev);
- if (ret) {
- error_setg(errp, "vfio: vfio_base_device_init failed for %s",
- vbasedev->name);
- return;
- }
-
- for (i = 0; i < vbasedev->num_regions; i++) {
- if (vfio_region_mmap(vdev->regions[i])) {
- error_report("%s mmap unsupported. Performance may be slow",
- memory_region_name(vdev->regions[i]->mem));
- }
- sysbus_init_mmio(sbdev, vdev->regions[i]->mem);
- }
-}
-
-static const VMStateDescription vfio_platform_vmstate = {
- .name = TYPE_VFIO_PLATFORM,
- .unmigratable = 1,
-};
-
-static Property vfio_platform_dev_properties[] = {
- DEFINE_PROP_STRING("host", VFIOPlatformDevice, vbasedev.name),
- DEFINE_PROP_STRING("sysfsdev", VFIOPlatformDevice, vbasedev.sysfsdev),
- DEFINE_PROP_BOOL("x-no-mmap", VFIOPlatformDevice, vbasedev.no_mmap, false),
- DEFINE_PROP_UINT32("mmap-timeout-ms", VFIOPlatformDevice,
- mmap_timeout, 1100),
- DEFINE_PROP_BOOL("x-irqfd", VFIOPlatformDevice, irqfd_allowed, true),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static void vfio_platform_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
-
- dc->realize = vfio_platform_realize;
- dc->props = vfio_platform_dev_properties;
- dc->vmsd = &vfio_platform_vmstate;
- dc->desc = "VFIO-based platform device assignment";
- sbc->connect_irq_notifier = vfio_start_irqfd_injection;
- set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-}
-
-static const TypeInfo vfio_platform_dev_info = {
- .name = TYPE_VFIO_PLATFORM,
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(VFIOPlatformDevice),
- .class_init = vfio_platform_class_init,
- .class_size = sizeof(VFIOPlatformDeviceClass),
- .abstract = true,
-};
-
-static void register_vfio_platform_dev_type(void)
-{
- type_register_static(&vfio_platform_dev_info);
-}
-
-type_init(register_vfio_platform_dev_type)