From bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 Mon Sep 17 00:00:00 2001 From: RajithaY Date: Tue, 25 Apr 2017 03:31:15 -0700 Subject: Adding qemu as a submodule of KVMFORNFV This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY --- qemu/hw/vfio/pci.c | 2734 ---------------------------------------------------- 1 file changed, 2734 deletions(-) delete mode 100644 qemu/hw/vfio/pci.c (limited to 'qemu/hw/vfio/pci.c') 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 - * - * 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 -#include -#include - -#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, ®_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(®ion->mmaps[1], ®ion->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, ®_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, ®_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) -- cgit 1.2.3-korg