diff options
Diffstat (limited to 'qemu/hw/intc/xics_kvm.c')
| -rw-r--r-- | qemu/hw/intc/xics_kvm.c | 512 |
1 files changed, 0 insertions, 512 deletions
diff --git a/qemu/hw/intc/xics_kvm.c b/qemu/hw/intc/xics_kvm.c deleted file mode 100644 index 9029d9ee0..000000000 --- a/qemu/hw/intc/xics_kvm.c +++ /dev/null @@ -1,512 +0,0 @@ -/* - * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator - * - * PAPR Virtualized Interrupt System, aka ICS/ICP aka xics, in-kernel emulation - * - * Copyright (c) 2013 David Gibson, IBM Corporation. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - * - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include "qemu-common.h" -#include "cpu.h" -#include "hw/hw.h" -#include "trace.h" -#include "hw/ppc/spapr.h" -#include "hw/ppc/xics.h" -#include "kvm_ppc.h" -#include "qemu/config-file.h" -#include "qemu/error-report.h" - -#include <sys/ioctl.h> - -typedef struct KVMXICSState { - XICSState parent_obj; - - int kernel_xics_fd; -} KVMXICSState; - -/* - * ICP-KVM - */ -static void icp_get_kvm_state(ICPState *ss) -{ - uint64_t state; - struct kvm_one_reg reg = { - .id = KVM_REG_PPC_ICP_STATE, - .addr = (uintptr_t)&state, - }; - int ret; - - /* ICP for this CPU thread is not in use, exiting */ - if (!ss->cs) { - return; - } - - ret = kvm_vcpu_ioctl(ss->cs, KVM_GET_ONE_REG, ®); - if (ret != 0) { - error_report("Unable to retrieve KVM interrupt controller state" - " for CPU %ld: %s", kvm_arch_vcpu_id(ss->cs), strerror(errno)); - exit(1); - } - - ss->xirr = state >> KVM_REG_PPC_ICP_XISR_SHIFT; - ss->mfrr = (state >> KVM_REG_PPC_ICP_MFRR_SHIFT) - & KVM_REG_PPC_ICP_MFRR_MASK; - ss->pending_priority = (state >> KVM_REG_PPC_ICP_PPRI_SHIFT) - & KVM_REG_PPC_ICP_PPRI_MASK; -} - -static int icp_set_kvm_state(ICPState *ss, int version_id) -{ - uint64_t state; - struct kvm_one_reg reg = { - .id = KVM_REG_PPC_ICP_STATE, - .addr = (uintptr_t)&state, - }; - int ret; - - /* ICP for this CPU thread is not in use, exiting */ - if (!ss->cs) { - return 0; - } - - state = ((uint64_t)ss->xirr << KVM_REG_PPC_ICP_XISR_SHIFT) - | ((uint64_t)ss->mfrr << KVM_REG_PPC_ICP_MFRR_SHIFT) - | ((uint64_t)ss->pending_priority << KVM_REG_PPC_ICP_PPRI_SHIFT); - - ret = kvm_vcpu_ioctl(ss->cs, KVM_SET_ONE_REG, ®); - if (ret != 0) { - error_report("Unable to restore KVM interrupt controller state (0x%" - PRIx64 ") for CPU %ld: %s", state, kvm_arch_vcpu_id(ss->cs), - strerror(errno)); - return ret; - } - - return 0; -} - -static void icp_kvm_reset(DeviceState *dev) -{ - ICPState *icp = ICP(dev); - - icp->xirr = 0; - icp->pending_priority = 0xff; - icp->mfrr = 0xff; - - /* Make all outputs are deasserted */ - qemu_set_irq(icp->output, 0); - - icp_set_kvm_state(icp, 1); -} - -static void icp_kvm_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - ICPStateClass *icpc = ICP_CLASS(klass); - - dc->reset = icp_kvm_reset; - icpc->pre_save = icp_get_kvm_state; - icpc->post_load = icp_set_kvm_state; -} - -static const TypeInfo icp_kvm_info = { - .name = TYPE_KVM_ICP, - .parent = TYPE_ICP, - .instance_size = sizeof(ICPState), - .class_init = icp_kvm_class_init, - .class_size = sizeof(ICPStateClass), -}; - -/* - * ICS-KVM - */ -static void ics_get_kvm_state(ICSState *ics) -{ - KVMXICSState *icpkvm = KVM_XICS(ics->icp); - uint64_t state; - struct kvm_device_attr attr = { - .flags = 0, - .group = KVM_DEV_XICS_GRP_SOURCES, - .addr = (uint64_t)(uintptr_t)&state, - }; - int i; - - for (i = 0; i < ics->nr_irqs; i++) { - ICSIRQState *irq = &ics->irqs[i]; - int ret; - - attr.attr = i + ics->offset; - - ret = ioctl(icpkvm->kernel_xics_fd, KVM_GET_DEVICE_ATTR, &attr); - if (ret != 0) { - error_report("Unable to retrieve KVM interrupt controller state" - " for IRQ %d: %s", i + ics->offset, strerror(errno)); - exit(1); - } - - irq->server = state & KVM_XICS_DESTINATION_MASK; - irq->saved_priority = (state >> KVM_XICS_PRIORITY_SHIFT) - & KVM_XICS_PRIORITY_MASK; - /* - * To be consistent with the software emulation in xics.c, we - * split out the masked state + priority that we get from the - * kernel into 'current priority' (0xff if masked) and - * 'saved priority' (if masked, this is the priority the - * interrupt had before it was masked). Masking and unmasking - * are done with the ibm,int-off and ibm,int-on RTAS calls. - */ - if (state & KVM_XICS_MASKED) { - irq->priority = 0xff; - } else { - irq->priority = irq->saved_priority; - } - - if (state & KVM_XICS_PENDING) { - if (state & KVM_XICS_LEVEL_SENSITIVE) { - irq->status |= XICS_STATUS_ASSERTED; - } else { - /* - * A pending edge-triggered interrupt (or MSI) - * must have been rejected previously when we - * first detected it and tried to deliver it, - * so mark it as pending and previously rejected - * for consistency with how xics.c works. - */ - irq->status |= XICS_STATUS_MASKED_PENDING - | XICS_STATUS_REJECTED; - } - } - } -} - -static int ics_set_kvm_state(ICSState *ics, int version_id) -{ - KVMXICSState *icpkvm = KVM_XICS(ics->icp); - uint64_t state; - struct kvm_device_attr attr = { - .flags = 0, - .group = KVM_DEV_XICS_GRP_SOURCES, - .addr = (uint64_t)(uintptr_t)&state, - }; - int i; - - for (i = 0; i < ics->nr_irqs; i++) { - ICSIRQState *irq = &ics->irqs[i]; - int ret; - - attr.attr = i + ics->offset; - - state = irq->server; - state |= (uint64_t)(irq->saved_priority & KVM_XICS_PRIORITY_MASK) - << KVM_XICS_PRIORITY_SHIFT; - if (irq->priority != irq->saved_priority) { - assert(irq->priority == 0xff); - state |= KVM_XICS_MASKED; - } - - if (ics->irqs[i].flags & XICS_FLAGS_IRQ_LSI) { - state |= KVM_XICS_LEVEL_SENSITIVE; - if (irq->status & XICS_STATUS_ASSERTED) { - state |= KVM_XICS_PENDING; - } - } else { - if (irq->status & XICS_STATUS_MASKED_PENDING) { - state |= KVM_XICS_PENDING; - } - } - - ret = ioctl(icpkvm->kernel_xics_fd, KVM_SET_DEVICE_ATTR, &attr); - if (ret != 0) { - error_report("Unable to restore KVM interrupt controller state" - " for IRQs %d: %s", i + ics->offset, strerror(errno)); - return ret; - } - } - - return 0; -} - -static void ics_kvm_set_irq(void *opaque, int srcno, int val) -{ - ICSState *ics = opaque; - struct kvm_irq_level args; - int rc; - - args.irq = srcno + ics->offset; - if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_MSI) { - if (!val) { - return; - } - args.level = KVM_INTERRUPT_SET; - } else { - args.level = val ? KVM_INTERRUPT_SET_LEVEL : KVM_INTERRUPT_UNSET; - } - rc = kvm_vm_ioctl(kvm_state, KVM_IRQ_LINE, &args); - if (rc < 0) { - perror("kvm_irq_line"); - } -} - -static void ics_kvm_reset(DeviceState *dev) -{ - ICSState *ics = ICS(dev); - int i; - uint8_t flags[ics->nr_irqs]; - - for (i = 0; i < ics->nr_irqs; i++) { - flags[i] = ics->irqs[i].flags; - } - - memset(ics->irqs, 0, sizeof(ICSIRQState) * ics->nr_irqs); - - for (i = 0; i < ics->nr_irqs; i++) { - ics->irqs[i].priority = 0xff; - ics->irqs[i].saved_priority = 0xff; - ics->irqs[i].flags = flags[i]; - } - - ics_set_kvm_state(ics, 1); -} - -static void ics_kvm_realize(DeviceState *dev, Error **errp) -{ - ICSState *ics = ICS(dev); - - if (!ics->nr_irqs) { - error_setg(errp, "Number of interrupts needs to be greater 0"); - return; - } - ics->irqs = g_malloc0(ics->nr_irqs * sizeof(ICSIRQState)); - ics->qirqs = qemu_allocate_irqs(ics_kvm_set_irq, ics, ics->nr_irqs); -} - -static void ics_kvm_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - ICSStateClass *icsc = ICS_CLASS(klass); - - dc->realize = ics_kvm_realize; - dc->reset = ics_kvm_reset; - icsc->pre_save = ics_get_kvm_state; - icsc->post_load = ics_set_kvm_state; -} - -static const TypeInfo ics_kvm_info = { - .name = TYPE_KVM_ICS, - .parent = TYPE_ICS, - .instance_size = sizeof(ICSState), - .class_init = ics_kvm_class_init, -}; - -/* - * XICS-KVM - */ -static void xics_kvm_cpu_setup(XICSState *icp, PowerPCCPU *cpu) -{ - CPUState *cs; - ICPState *ss; - KVMXICSState *icpkvm = KVM_XICS(icp); - - cs = CPU(cpu); - ss = &icp->ss[cs->cpu_index]; - - assert(cs->cpu_index < icp->nr_servers); - if (icpkvm->kernel_xics_fd == -1) { - abort(); - } - - /* - * If we are reusing a parked vCPU fd corresponding to the CPU - * which was hot-removed earlier we don't have to renable - * KVM_CAP_IRQ_XICS capability again. - */ - if (ss->cap_irq_xics_enabled) { - return; - } - - if (icpkvm->kernel_xics_fd != -1) { - int ret; - - ss->cs = cs; - - ret = kvm_vcpu_enable_cap(cs, KVM_CAP_IRQ_XICS, 0, - icpkvm->kernel_xics_fd, kvm_arch_vcpu_id(cs)); - if (ret < 0) { - error_report("Unable to connect CPU%ld to kernel XICS: %s", - kvm_arch_vcpu_id(cs), strerror(errno)); - exit(1); - } - ss->cap_irq_xics_enabled = true; - } -} - -static void xics_kvm_set_nr_irqs(XICSState *icp, uint32_t nr_irqs, Error **errp) -{ - icp->nr_irqs = icp->ics->nr_irqs = nr_irqs; -} - -static void xics_kvm_set_nr_servers(XICSState *icp, uint32_t nr_servers, - Error **errp) -{ - int i; - - icp->nr_servers = nr_servers; - - icp->ss = g_malloc0(icp->nr_servers*sizeof(ICPState)); - for (i = 0; i < icp->nr_servers; i++) { - char buffer[32]; - object_initialize(&icp->ss[i], sizeof(icp->ss[i]), TYPE_KVM_ICP); - snprintf(buffer, sizeof(buffer), "icp[%d]", i); - object_property_add_child(OBJECT(icp), buffer, OBJECT(&icp->ss[i]), - errp); - } -} - -static void rtas_dummy(PowerPCCPU *cpu, sPAPRMachineState *spapr, - uint32_t token, - uint32_t nargs, target_ulong args, - uint32_t nret, target_ulong rets) -{ - error_report("pseries: %s must never be called for in-kernel XICS", - __func__); -} - -static void xics_kvm_realize(DeviceState *dev, Error **errp) -{ - KVMXICSState *icpkvm = KVM_XICS(dev); - XICSState *icp = XICS_COMMON(dev); - int i, rc; - Error *error = NULL; - struct kvm_create_device xics_create_device = { - .type = KVM_DEV_TYPE_XICS, - .flags = 0, - }; - - if (!kvm_enabled() || !kvm_check_extension(kvm_state, KVM_CAP_IRQ_XICS)) { - error_setg(errp, - "KVM and IRQ_XICS capability must be present for in-kernel XICS"); - goto fail; - } - - spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_dummy); - spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_dummy); - spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_dummy); - spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_dummy); - - rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_SET_XIVE, "ibm,set-xive"); - if (rc < 0) { - error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,set-xive"); - goto fail; - } - - rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_GET_XIVE, "ibm,get-xive"); - if (rc < 0) { - error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,get-xive"); - goto fail; - } - - rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_ON, "ibm,int-on"); - if (rc < 0) { - error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-on"); - goto fail; - } - - rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_OFF, "ibm,int-off"); - if (rc < 0) { - error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-off"); - goto fail; - } - - /* Create the kernel ICP */ - rc = kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &xics_create_device); - if (rc < 0) { - error_setg_errno(errp, -rc, "Error on KVM_CREATE_DEVICE for XICS"); - goto fail; - } - - icpkvm->kernel_xics_fd = xics_create_device.fd; - - object_property_set_bool(OBJECT(icp->ics), true, "realized", &error); - if (error) { - error_propagate(errp, error); - goto fail; - } - - assert(icp->nr_servers); - for (i = 0; i < icp->nr_servers; i++) { - object_property_set_bool(OBJECT(&icp->ss[i]), true, "realized", &error); - if (error) { - error_propagate(errp, error); - goto fail; - } - } - - kvm_kernel_irqchip = true; - kvm_msi_via_irqfd_allowed = true; - kvm_gsi_direct_mapping = true; - - return; - -fail: - kvmppc_define_rtas_kernel_token(0, "ibm,set-xive"); - kvmppc_define_rtas_kernel_token(0, "ibm,get-xive"); - kvmppc_define_rtas_kernel_token(0, "ibm,int-on"); - kvmppc_define_rtas_kernel_token(0, "ibm,int-off"); -} - -static void xics_kvm_initfn(Object *obj) -{ - XICSState *xics = XICS_COMMON(obj); - - xics->ics = ICS(object_new(TYPE_KVM_ICS)); - object_property_add_child(obj, "ics", OBJECT(xics->ics), NULL); - xics->ics->icp = xics; -} - -static void xics_kvm_class_init(ObjectClass *oc, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(oc); - XICSStateClass *xsc = XICS_COMMON_CLASS(oc); - - dc->realize = xics_kvm_realize; - xsc->cpu_setup = xics_kvm_cpu_setup; - xsc->set_nr_irqs = xics_kvm_set_nr_irqs; - xsc->set_nr_servers = xics_kvm_set_nr_servers; -} - -static const TypeInfo xics_kvm_info = { - .name = TYPE_KVM_XICS, - .parent = TYPE_XICS_COMMON, - .instance_size = sizeof(KVMXICSState), - .class_init = xics_kvm_class_init, - .instance_init = xics_kvm_initfn, -}; - -static void xics_kvm_register_types(void) -{ - type_register_static(&xics_kvm_info); - type_register_static(&ics_kvm_info); - type_register_static(&icp_kvm_info); -} - -type_init(xics_kvm_register_types) |