/* * ARM implementation of KVM hooks * * Copyright Christoffer Dall 2009-2010 * Copyright Mian-M. Hamayun 2013, Virtual Open Systems * Copyright Alex BennĂ©e 2014, Linaro * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. * */ #include "qemu/osdep.h" #include #include #include "qemu/timer.h" #include "qemu/error-report.h" #include "qemu/main-loop.h" #include "qom/object.h" #include "qapi/error.h" #include "sysemu/sysemu.h" #include "sysemu/runstate.h" #include "sysemu/kvm.h" #include "sysemu/kvm_int.h" #include "kvm_arm.h" #include "cpu.h" #include "trace.h" #include "internals.h" #include "hw/pci/pci.h" #include "exec/memattrs.h" #include "exec/address-spaces.h" #include "gdbstub/enums.h" #include "hw/boards.h" #include "hw/irq.h" #include "qapi/visitor.h" #include "qemu/log.h" #include "hw/acpi/acpi.h" #include "hw/acpi/ghes.h" #include "target/arm/gtimer.h" #include "migration/blocker.h" const KVMCapabilityInfo kvm_arch_required_capabilities[] = { KVM_CAP_INFO(DEVICE_CTRL), KVM_CAP_LAST_INFO }; static bool cap_has_mp_state; static bool cap_has_inject_serror_esr; static bool cap_has_inject_ext_dabt; /** * ARMHostCPUFeatures: information about the host CPU (identified * by asking the host kernel) */ typedef struct ARMHostCPUFeatures { ARMISARegisters isar; uint64_t features; uint32_t target; const char *dtb_compatible; } ARMHostCPUFeatures; static ARMHostCPUFeatures arm_host_cpu_features; /** * kvm_arm_vcpu_init: * @cpu: ARMCPU * * Initialize (or reinitialize) the VCPU by invoking the * KVM_ARM_VCPU_INIT ioctl with the CPU type and feature * bitmask specified in the CPUState. * * Returns: 0 if success else < 0 error code */ static int kvm_arm_vcpu_init(ARMCPU *cpu) { struct kvm_vcpu_init init; init.target = cpu->kvm_target; memcpy(init.features, cpu->kvm_init_features, sizeof(init.features)); return kvm_vcpu_ioctl(CPU(cpu), KVM_ARM_VCPU_INIT, &init); } /** * kvm_arm_vcpu_finalize: * @cpu: ARMCPU * @feature: feature to finalize * * Finalizes the configuration of the specified VCPU feature by * invoking the KVM_ARM_VCPU_FINALIZE ioctl. Features requiring * this are documented in the "KVM_ARM_VCPU_FINALIZE" section of * KVM's API documentation. * * Returns: 0 if success else < 0 error code */ static int kvm_arm_vcpu_finalize(ARMCPU *cpu, int feature) { return kvm_vcpu_ioctl(CPU(cpu), KVM_ARM_VCPU_FINALIZE, &feature); } bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try, int *fdarray, struct kvm_vcpu_init *init) { int ret = 0, kvmfd = -1, vmfd = -1, cpufd = -1; int max_vm_pa_size; kvmfd = qemu_open_old("/dev/kvm", O_RDWR); if (kvmfd < 0) { goto err; } max_vm_pa_size = ioctl(kvmfd, KVM_CHECK_EXTENSION, KVM_CAP_ARM_VM_IPA_SIZE); if (max_vm_pa_size < 0) { max_vm_pa_size = 0; } do { vmfd = ioctl(kvmfd, KVM_CREATE_VM, max_vm_pa_size); } while (vmfd == -1 && errno == EINTR); if (vmfd < 0) { goto err; } /* * The MTE capability must be enabled by the VMM before creating * any VCPUs in order to allow the MTE bits of the ID_AA64PFR1 * register to be probed correctly, as they are masked if MTE * is not enabled. */ if (kvm_arm_mte_supported()) { KVMState kvm_state; kvm_state.fd = kvmfd; kvm_state.vmfd = vmfd; kvm_vm_enable_cap(&kvm_state, KVM_CAP_ARM_MTE, 0); } cpufd = ioctl(vmfd, KVM_CREATE_VCPU, 0); if (cpufd < 0) { goto err; } if (!init) { /* Caller doesn't want the VCPU to be initialized, so skip it */ goto finish; } if (init->target == -1) { struct kvm_vcpu_init preferred; ret = ioctl(vmfd, KVM_ARM_PREFERRED_TARGET, &preferred); if (!ret) { init->target = preferred.target; } } if (ret >= 0) { ret = ioctl(cpufd, KVM_ARM_VCPU_INIT, init); if (ret < 0) { goto err; } } else if (cpus_to_try) { /* Old kernel which doesn't know about the * PREFERRED_TARGET ioctl: we know it will only support * creating one kind of guest CPU which is its preferred * CPU type. */ struct kvm_vcpu_init try; while (*cpus_to_try != QEMU_KVM_ARM_TARGET_NONE) { try.target = *cpus_to_try++; memcpy(try.features, init->features, sizeof(init->features)); ret = ioctl(cpufd, KVM_ARM_VCPU_INIT, &try); if (ret >= 0) { break; } } if (ret < 0) { goto err; } init->target = try.target; } else { /* Treat a NULL cpus_to_try argument the same as an empty * list, which means we will fail the call since this must * be an old kernel which doesn't support PREFERRED_TARGET. */ goto err; } finish: fdarray[0] = kvmfd; fdarray[1] = vmfd; fdarray[2] = cpufd; return true; err: if (cpufd >= 0) { close(cpufd); } if (vmfd >= 0) { close(vmfd); } if (kvmfd >= 0) { close(kvmfd); } return false; } void kvm_arm_destroy_scratch_host_vcpu(int *fdarray) { int i; for (i = 2; i >= 0; i--) { close(fdarray[i]); } } static int read_sys_reg32(int fd, uint32_t *pret, uint64_t id) { uint64_t ret; struct kvm_one_reg idreg = { .id = id, .addr = (uintptr_t)&ret }; int err; assert((id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64); err = ioctl(fd, KVM_GET_ONE_REG, &idreg); if (err < 0) { return -1; } *pret = ret; return 0; } static int read_sys_reg64(int fd, uint64_t *pret, uint64_t id) { struct kvm_one_reg idreg = { .id = id, .addr = (uintptr_t)pret }; assert((id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64); return ioctl(fd, KVM_GET_ONE_REG, &idreg); } static bool kvm_arm_pauth_supported(void) { return (kvm_check_extension(kvm_state, KVM_CAP_ARM_PTRAUTH_ADDRESS) && kvm_check_extension(kvm_state, KVM_CAP_ARM_PTRAUTH_GENERIC)); } static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) { /* Identify the feature bits corresponding to the host CPU, and * fill out the ARMHostCPUClass fields accordingly. To do this * we have to create a scratch VM, create a single CPU inside it, * and then query that CPU for the relevant ID registers. */ int fdarray[3]; bool sve_supported; bool pmu_supported = false; uint64_t features = 0; int err; /* Old kernels may not know about the PREFERRED_TARGET ioctl: however * we know these will only support creating one kind of guest CPU, * which is its preferred CPU type. Fortunately these old kernels * support only a very limited number of CPUs. */ static const uint32_t cpus_to_try[] = { KVM_ARM_TARGET_AEM_V8, KVM_ARM_TARGET_FOUNDATION_V8, KVM_ARM_TARGET_CORTEX_A57, QEMU_KVM_ARM_TARGET_NONE }; /* * target = -1 informs kvm_arm_create_scratch_host_vcpu() * to use the preferred target */ struct kvm_vcpu_init init = { .target = -1, }; /* * Ask for SVE if supported, so that we can query ID_AA64ZFR0, * which is otherwise RAZ. */ sve_supported = kvm_arm_sve_supported(); if (sve_supported) { init.features[0] |= 1 << KVM_ARM_VCPU_SVE; } /* * Ask for Pointer Authentication if supported, so that we get * the unsanitized field values for AA64ISAR1_EL1. */ if (kvm_arm_pauth_supported()) { init.features[0] |= (1 << KVM_ARM_VCPU_PTRAUTH_ADDRESS | 1 << KVM_ARM_VCPU_PTRAUTH_GENERIC); } if (kvm_arm_pmu_supported()) { init.features[0] |= 1 << KVM_ARM_VCPU_PMU_V3; pmu_supported = true; features |= 1ULL << ARM_FEATURE_PMU; } if (!kvm_arm_create_scratch_host_vcpu(cpus_to_try, fdarray, &init)) { return false; } ahcf->target = init.target; ahcf->dtb_compatible = "arm,arm-v8"; err = read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64pfr0, ARM64_SYS_REG(3, 0, 0, 4, 0)); if (unlikely(err < 0)) { /* * Before v4.15, the kernel only exposed a limited number of system * registers, not including any of the interesting AArch64 ID regs. * For the most part we could leave these fields as zero with minimal * effect, since this does not affect the values seen by the guest. * * However, it could cause problems down the line for QEMU, * so provide a minimal v8.0 default. * * ??? Could read MIDR and use knowledge from cpu64.c. * ??? Could map a page of memory into our temp guest and * run the tiniest of hand-crafted kernels to extract * the values seen by the guest. * ??? Either of these sounds like too much effort just * to work around running a modern host kernel. */ ahcf->isar.id_aa64pfr0 = 0x00000011; /* EL1&0, AArch64 only */ err = 0; } else { err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64pfr1, ARM64_SYS_REG(3, 0, 0, 4, 1)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64smfr0, ARM64_SYS_REG(3, 0, 0, 4, 5)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64dfr0, ARM64_SYS_REG(3, 0, 0, 5, 0)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64dfr1, ARM64_SYS_REG(3, 0, 0, 5, 1)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64isar0, ARM64_SYS_REG(3, 0, 0, 6, 0)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64isar1, ARM64_SYS_REG(3, 0, 0, 6, 1)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64isar2, ARM64_SYS_REG(3, 0, 0, 6, 2)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr0, ARM64_SYS_REG(3, 0, 0, 7, 0)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr1, ARM64_SYS_REG(3, 0, 0, 7, 1)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr2, ARM64_SYS_REG(3, 0, 0, 7, 2)); err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr3, ARM64_SYS_REG(3, 0, 0, 7, 3)); /* * Note that if AArch32 support is not present in the host, * the AArch32 sysregs are present to be read, but will * return UNKNOWN values. This is neither better nor worse * than skipping the reads and leaving 0, as we must avoid * considering the values in every case. */ err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_pfr0, ARM64_SYS_REG(3, 0, 0, 1, 0)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_pfr1, ARM64_SYS_REG(3, 0, 0, 1, 1)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_dfr0, ARM64_SYS_REG(3, 0, 0, 1, 2)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_mmfr0, ARM64_SYS_REG(3, 0, 0, 1, 4)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_mmfr1, ARM64_SYS_REG(3, 0, 0, 1, 5)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_mmfr2, ARM64_SYS_REG(3, 0, 0, 1, 6)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_mmfr3, ARM64_SYS_REG(3, 0, 0, 1, 7)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar0, ARM64_SYS_REG(3, 0, 0, 2, 0)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar1, ARM64_SYS_REG(3, 0, 0, 2, 1)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar2, ARM64_SYS_REG(3, 0, 0, 2, 2)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar3, ARM64_SYS_REG(3, 0, 0, 2, 3)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar4, ARM64_SYS_REG(3, 0, 0, 2, 4)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar5, ARM64_SYS_REG(3, 0, 0, 2, 5)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_mmfr4, ARM64_SYS_REG(3, 0, 0, 2, 6)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar6, ARM64_SYS_REG(3, 0, 0, 2, 7)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.mvfr0, ARM64_SYS_REG(3, 0, 0, 3, 0)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.mvfr1, ARM64_SYS_REG(3, 0, 0, 3, 1)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.mvfr2, ARM64_SYS_REG(3, 0, 0, 3, 2)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_pfr2, ARM64_SYS_REG(3, 0, 0, 3, 4)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_dfr1, ARM64_SYS_REG(3, 0, 0, 3, 5)); err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_mmfr5, ARM64_SYS_REG(3, 0, 0, 3, 6)); /* * DBGDIDR is a bit complicated because the kernel doesn't * provide an accessor for it in 64-bit mode, which is what this * scratch VM is in, and there's no architected "64-bit sysreg * which reads the same as the 32-bit register" the way there is * for other ID registers. Instead we synthesize a value from the * AArch64 ID_AA64DFR0, the same way the kernel code in * arch/arm64/kvm/sys_regs.c:trap_dbgidr() does. * We only do this if the CPU supports AArch32 at EL1. */ if (FIELD_EX32(ahcf->isar.id_aa64pfr0, ID_AA64PFR0, EL1) >= 2) { int wrps = FIELD_EX64(ahcf->isar.id_aa64dfr0, ID_AA64DFR0, WRPS); int brps = FIELD_EX64(ahcf->isar.id_aa64dfr0, ID_AA64DFR0, BRPS); int ctx_cmps = FIELD_EX64(ahcf->isar.id_aa64dfr0, ID_AA64DFR0, CTX_CMPS); int version = 6; /* ARMv8 debug architecture */ bool has_el3 = !!FIELD_EX32(ahcf->isar.id_aa64pfr0, ID_AA64PFR0, EL3); uint32_t dbgdidr = 0; dbgdidr = FIELD_DP32(dbgdidr, DBGDIDR, WRPS, wrps); dbgdidr = FIELD_DP32(dbgdidr, DBGDIDR, BRPS, brps); dbgdidr = FIELD_DP32(dbgdidr, DBGDIDR, CTX_CMPS, ctx_cmps); dbgdidr = FIELD_DP32(dbgdidr, DBGDIDR, VERSION, version); dbgdidr = FIELD_DP32(dbgdidr, DBGDIDR, NSUHD_IMP, has_el3); dbgdidr = FIELD_DP32(dbgdidr, DBGDIDR, SE_IMP, has_el3); dbgdidr |= (1 << 15); /* RES1 bit */ ahcf->isar.dbgdidr = dbgdidr; } if (pmu_supported) { /* PMCR_EL0 is only accessible if the vCPU has feature PMU_V3 */ err |= read_sys_reg64(fdarray[2], &ahcf->isar.reset_pmcr_el0, ARM64_SYS_REG(3, 3, 9, 12, 0)); } if (sve_supported) { /* * There is a range of kernels between kernel commit 73433762fcae * and f81cb2c3ad41 which have a bug where the kernel doesn't * expose SYS_ID_AA64ZFR0_EL1 via the ONE_REG API unless the VM has * enabled SVE support, which resulted in an error rather than RAZ. * So only read the register if we set KVM_ARM_VCPU_SVE above. */ err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64zfr0, ARM64_SYS_REG(3, 0, 0, 4, 4)); } } kvm_arm_destroy_scratch_host_vcpu(fdarray); if (err < 0) { return false; } /* * We can assume any KVM supporting CPU is at least a v8 * with VFPv4+Neon; this in turn implies most of the other * feature bits. */ features |= 1ULL << ARM_FEATURE_V8; features |= 1ULL << ARM_FEATURE_NEON; features |= 1ULL << ARM_FEATURE_AARCH64; features |= 1ULL << ARM_FEATURE_GENERIC_TIMER; ahcf->features = features; return true; } void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu) { CPUARMState *env = &cpu->env; if (!arm_host_cpu_features.dtb_compatible) { if (!kvm_enabled() || !kvm_arm_get_host_cpu_features(&arm_host_cpu_features)) { /* We can't report this error yet, so flag that we need to * in arm_cpu_realizefn(). */ cpu->kvm_target = QEMU_KVM_ARM_TARGET_NONE; cpu->host_cpu_probe_failed = true; return; } } cpu->kvm_target = arm_host_cpu_features.target; cpu->dtb_compatible = arm_host_cpu_features.dtb_compatible; cpu->isar = arm_host_cpu_features.isar; env->features = arm_host_cpu_features.features; } static bool kvm_no_adjvtime_get(Object *obj, Error **errp) { return !ARM_CPU(obj)->kvm_adjvtime; } static void kvm_no_adjvtime_set(Object *obj, bool value, Error **errp) { ARM_CPU(obj)->kvm_adjvtime = !value; } static bool kvm_steal_time_get(Object *obj, Error **errp) { return ARM_CPU(obj)->kvm_steal_time != ON_OFF_AUTO_OFF; } static void kvm_steal_time_set(Object *obj, bool value, Error **errp) { ARM_CPU(obj)->kvm_steal_time = value ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; } /* KVM VCPU properties should be prefixed with "kvm-". */ void kvm_arm_add_vcpu_properties(ARMCPU *cpu) { CPUARMState *env = &cpu->env; Object *obj = OBJECT(cpu); if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) { cpu->kvm_adjvtime = true; object_property_add_bool(obj, "kvm-no-adjvtime", kvm_no_adjvtime_get, kvm_no_adjvtime_set); object_property_set_description(obj, "kvm-no-adjvtime", "Set on to disable the adjustment of " "the virtual counter. VM stopped time " "will be counted."); } cpu->kvm_steal_time = ON_OFF_AUTO_AUTO; object_property_add_bool(obj, "kvm-steal-time", kvm_steal_time_get, kvm_steal_time_set); object_property_set_description(obj, "kvm-steal-time", "Set off to disable KVM steal time."); } bool kvm_arm_pmu_supported(void) { return kvm_check_extension(kvm_state, KVM_CAP_ARM_PMU_V3); } int kvm_arm_get_max_vm_ipa_size(MachineState *ms, bool *fixed_ipa) { KVMState *s = KVM_STATE(ms->accelerator); int ret; ret = kvm_check_extension(s, KVM_CAP_ARM_VM_IPA_SIZE); *fixed_ipa = ret <= 0; return ret > 0 ? ret : 40; } int kvm_arch_get_default_type(MachineState *ms) { bool fixed_ipa; int size = kvm_arm_get_max_vm_ipa_size(ms, &fixed_ipa); return fixed_ipa ? 0 : size; } int kvm_arch_init(MachineState *ms, KVMState *s) { int ret = 0; /* For ARM interrupt delivery is always asynchronous, * whether we are using an in-kernel VGIC or not. */ kvm_async_interrupts_allowed = true; /* * PSCI wakes up secondary cores, so we always need to * have vCPUs waiting in kernel space */ kvm_halt_in_kernel_allowed = true; cap_has_mp_state = kvm_check_extension(s, KVM_CAP_MP_STATE); /* Check whether user space can specify guest syndrome value */ cap_has_inject_serror_esr = kvm_check_extension(s, KVM_CAP_ARM_INJECT_SERROR_ESR); if (ms->smp.cpus > 256 && !kvm_check_extension(s, KVM_CAP_ARM_IRQ_LINE_LAYOUT_2)) { error_report("Using more than 256 vcpus requires a host kernel " "with KVM_CAP_ARM_IRQ_LINE_LAYOUT_2"); ret = -EINVAL; } if (kvm_check_extension(s, KVM_CAP_ARM_NISV_TO_USER)) { if (kvm_vm_enable_cap(s, KVM_CAP_ARM_NISV_TO_USER, 0)) { error_report("Failed to enable KVM_CAP_ARM_NISV_TO_USER cap"); } else { /* Set status for supporting the external dabt injection */ cap_has_inject_ext_dabt = kvm_check_extension(s, KVM_CAP_ARM_INJECT_EXT_DABT); } } if (s->kvm_eager_split_size) { uint32_t sizes; sizes = kvm_vm_check_extension(s, KVM_CAP_ARM_SUPPORTED_BLOCK_SIZES); if (!sizes) { s->kvm_eager_split_size = 0; warn_report("Eager Page Split support not available"); } else if (!(s->kvm_eager_split_size & sizes)) { error_report("Eager Page Split requested chunk size not valid"); ret = -EINVAL; } else { ret = kvm_vm_enable_cap(s, KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE, 0, s->kvm_eager_split_size); if (ret < 0) { error_report("Enabling of Eager Page Split failed: %s", strerror(-ret)); } } } max_hw_wps = kvm_check_extension(s, KVM_CAP_GUEST_DEBUG_HW_WPS); hw_watchpoints = g_array_sized_new(true, true, sizeof(HWWatchpoint), max_hw_wps); max_hw_bps = kvm_check_extension(s, KVM_CAP_GUEST_DEBUG_HW_BPS); hw_breakpoints = g_array_sized_new(true, true, sizeof(HWBreakpoint), max_hw_bps); return ret; } unsigned long kvm_arch_vcpu_id(CPUState *cpu) { return cpu->cpu_index; } /* We track all the KVM devices which need their memory addresses * passing to the kernel in a list of these structures. * When board init is complete we run through the list and * tell the kernel the base addresses of the memory regions. * We use a MemoryListener to track mapping and unmapping of * the regions during board creation, so the board models don't * need to do anything special for the KVM case. * * Sometimes the address must be OR'ed with some other fields * (for example for KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION). * @kda_addr_ormask aims at storing the value of those fields. */ typedef struct KVMDevice { struct kvm_arm_device_addr kda; struct kvm_device_attr kdattr; uint64_t kda_addr_ormask; MemoryRegion *mr; QSLIST_ENTRY(KVMDevice) entries; int dev_fd; } KVMDevice; static QSLIST_HEAD(, KVMDevice) kvm_devices_head; static void kvm_arm_devlistener_add(MemoryListener *listener, MemoryRegionSection *section) { KVMDevice *kd; QSLIST_FOREACH(kd, &kvm_devices_head, entries) { if (section->mr == kd->mr) { kd->kda.addr = section->offset_within_address_space; } } } static void kvm_arm_devlistener_del(MemoryListener *listener, MemoryRegionSection *section) { KVMDevice *kd; QSLIST_FOREACH(kd, &kvm_devices_head, entries) { if (section->mr == kd->mr) { kd->kda.addr = -1; } } } static MemoryListener devlistener = { .name = "kvm-arm", .region_add = kvm_arm_devlistener_add, .region_del = kvm_arm_devlistener_del, .priority = MEMORY_LISTENER_PRIORITY_MIN, }; static void kvm_arm_set_device_addr(KVMDevice *kd) { struct kvm_device_attr *attr = &kd->kdattr; int ret; uint64_t addr = kd->kda.addr; addr |= kd->kda_addr_ormask; attr->addr = (uintptr_t)&addr; ret = kvm_device_ioctl(kd->dev_fd, KVM_SET_DEVICE_ATTR, attr); if (ret < 0) { fprintf(stderr, "Failed to set device address: %s\n", strerror(-ret)); abort(); } } static void kvm_arm_machine_init_done(Notifier *notifier, void *data) { KVMDevice *kd, *tkd; QSLIST_FOREACH_SAFE(kd, &kvm_devices_head, entries, tkd) { if (kd->kda.addr != -1) { kvm_arm_set_device_addr(kd); } memory_region_unref(kd->mr); QSLIST_REMOVE_HEAD(&kvm_devices_head, entries); g_free(kd); } memory_listener_unregister(&devlistener); } static Notifier notify = { .notify = kvm_arm_machine_init_done, }; void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid, uint64_t group, uint64_t attr, int dev_fd, uint64_t addr_ormask) { KVMDevice *kd; if (!kvm_irqchip_in_kernel()) { return; } if (QSLIST_EMPTY(&kvm_devices_head)) { memory_listener_register(&devlistener, &address_space_memory); qemu_add_machine_init_done_notifier(¬ify); } kd = g_new0(KVMDevice, 1); kd->mr = mr; kd->kda.id = devid; kd->kda.addr = -1; kd->kdattr.flags = 0; kd->kdattr.group = group; kd->kdattr.attr = attr; kd->dev_fd = dev_fd; kd->kda_addr_ormask = addr_ormask; QSLIST_INSERT_HEAD(&kvm_devices_head, kd, entries); memory_region_ref(kd->mr); } static int compare_u64(const void *a, const void *b) { if (*(uint64_t *)a > *(uint64_t *)b) { return 1; } if (*(uint64_t *)a < *(uint64_t *)b) { return -1; } return 0; } /* * cpreg_values are sorted in ascending order by KVM register ID * (see kvm_arm_init_cpreg_list). This allows us to cheaply find * the storage for a KVM register by ID with a binary search. */ static uint64_t *kvm_arm_get_cpreg_ptr(ARMCPU *cpu, uint64_t regidx) { uint64_t *res; res = bsearch(®idx, cpu->cpreg_indexes, cpu->cpreg_array_len, sizeof(uint64_t), compare_u64); assert(res); return &cpu->cpreg_values[res - cpu->cpreg_indexes]; } /** * kvm_arm_reg_syncs_via_cpreg_list: * @regidx: KVM register index * * Return true if this KVM register should be synchronized via the * cpreg list of arbitrary system registers, false if it is synchronized * by hand using code in kvm_arch_get/put_registers(). */ static bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx) { switch (regidx & KVM_REG_ARM_COPROC_MASK) { case KVM_REG_ARM_CORE: case KVM_REG_ARM64_SVE: return false; default: return true; } } /** * kvm_arm_init_cpreg_list: * @cpu: ARMCPU * * Initialize the ARMCPU cpreg list according to the kernel's * definition of what CPU registers it knows about (and throw away * the previous TCG-created cpreg list). * * Returns: 0 if success, else < 0 error code */ static int kvm_arm_init_cpreg_list(ARMCPU *cpu) { struct kvm_reg_list rl; struct kvm_reg_list *rlp; int i, ret, arraylen; CPUState *cs = CPU(cpu); rl.n = 0; ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, &rl); if (ret != -E2BIG) { return ret; } rlp = g_malloc(sizeof(struct kvm_reg_list) + rl.n * sizeof(uint64_t)); rlp->n = rl.n; ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, rlp); if (ret) { goto out; } /* Sort the list we get back from the kernel, since cpreg_tuples * must be in strictly ascending order. */ qsort(&rlp->reg, rlp->n, sizeof(rlp->reg[0]), compare_u64); for (i = 0, arraylen = 0; i < rlp->n; i++) { if (!kvm_arm_reg_syncs_via_cpreg_list(rlp->reg[i])) { continue; } switch (rlp->reg[i] & KVM_REG_SIZE_MASK) { case KVM_REG_SIZE_U32: case KVM_REG_SIZE_U64: break; default: fprintf(stderr, "Can't handle size of register in kernel list\n"); ret = -EINVAL; goto out; } arraylen++; } cpu->cpreg_indexes = g_renew(uint64_t, cpu->cpreg_indexes, arraylen); cpu->cpreg_values = g_renew(uint64_t, cpu->cpreg_values, arraylen); cpu->cpreg_vmstate_indexes = g_renew(uint64_t, cpu->cpreg_vmstate_indexes, arraylen); cpu->cpreg_vmstate_values = g_renew(uint64_t, cpu->cpreg_vmstate_values, arraylen); cpu->cpreg_array_len = arraylen; cpu->cpreg_vmstate_array_len = arraylen; for (i = 0, arraylen = 0; i < rlp->n; i++) { uint64_t regidx = rlp->reg[i]; if (!kvm_arm_reg_syncs_via_cpreg_list(regidx)) { continue; } cpu->cpreg_indexes[arraylen] = regidx; arraylen++; } assert(cpu->cpreg_array_len == arraylen); if (!write_kvmstate_to_list(cpu)) { /* Shouldn't happen unless kernel is inconsistent about * what registers exist. */ fprintf(stderr, "Initial read of kernel register state failed\n"); ret = -EINVAL; goto out; } out: g_free(rlp); return ret; } /** * kvm_arm_cpreg_level: * @regidx: KVM register index * * Return the level of this coprocessor/system register. Return value is * either KVM_PUT_RUNTIME_STATE, KVM_PUT_RESET_STATE, or KVM_PUT_FULL_STATE. */ static int kvm_arm_cpreg_level(uint64_t regidx) { /* * All system registers are assumed to be level KVM_PUT_RUNTIME_STATE. * If a register should be written less often, you must add it here * with a state of either KVM_PUT_RESET_STATE or KVM_PUT_FULL_STATE. */ switch (regidx) { case KVM_REG_ARM_TIMER_CNT: case KVM_REG_ARM_PTIMER_CNT: return KVM_PUT_FULL_STATE; } return KVM_PUT_RUNTIME_STATE; } bool write_kvmstate_to_list(ARMCPU *cpu) { CPUState *cs = CPU(cpu); int i; bool ok = true; for (i = 0; i < cpu->cpreg_array_len; i++) { uint64_t regidx = cpu->cpreg_indexes[i]; uint32_t v32; int ret; switch (regidx & KVM_REG_SIZE_MASK) { case KVM_REG_SIZE_U32: ret = kvm_get_one_reg(cs, regidx, &v32); if (!ret) { cpu->cpreg_values[i] = v32; } break; case KVM_REG_SIZE_U64: ret = kvm_get_one_reg(cs, regidx, cpu->cpreg_values + i); break; default: g_assert_not_reached(); } if (ret) { ok = false; } } return ok; } bool write_list_to_kvmstate(ARMCPU *cpu, int level) { CPUState *cs = CPU(cpu); int i; bool ok = true; for (i = 0; i < cpu->cpreg_array_len; i++) { uint64_t regidx = cpu->cpreg_indexes[i]; uint32_t v32; int ret; if (kvm_arm_cpreg_level(regidx) > level) { continue; } switch (regidx & KVM_REG_SIZE_MASK) { case KVM_REG_SIZE_U32: v32 = cpu->cpreg_values[i]; ret = kvm_set_one_reg(cs, regidx, &v32); break; case KVM_REG_SIZE_U64: ret = kvm_set_one_reg(cs, regidx, cpu->cpreg_values + i); break; default: g_assert_not_reached(); } if (ret) { /* We might fail for "unknown register" and also for * "you tried to set a register which is constant with * a different value from what it actually contains". */ ok = false; } } return ok; } void kvm_arm_cpu_pre_save(ARMCPU *cpu) { /* KVM virtual time adjustment */ if (cpu->kvm_vtime_dirty) { *kvm_arm_get_cpreg_ptr(cpu, KVM_REG_ARM_TIMER_CNT) = cpu->kvm_vtime; } } void kvm_arm_cpu_post_load(ARMCPU *cpu) { /* KVM virtual time adjustment */ if (cpu->kvm_adjvtime) { cpu->kvm_vtime = *kvm_arm_get_cpreg_ptr(cpu, KVM_REG_ARM_TIMER_CNT); cpu->kvm_vtime_dirty = true; } } void kvm_arm_reset_vcpu(ARMCPU *cpu) { int ret; /* Re-init VCPU so that all registers are set to * their respective reset values. */ ret = kvm_arm_vcpu_init(cpu); if (ret < 0) { fprintf(stderr, "kvm_arm_vcpu_init failed: %s\n", strerror(-ret)); abort(); } if (!write_kvmstate_to_list(cpu)) { fprintf(stderr, "write_kvmstate_to_list failed\n"); abort(); } /* * Sync the reset values also into the CPUState. This is necessary * because the next thing we do will be a kvm_arch_put_registers() * which will update the list values from the CPUState before copying * the list values back to KVM. It's OK to ignore failure returns here * for the same reason we do so in kvm_arch_get_registers(). */ write_list_to_cpustate(cpu); } /* * Update KVM's MP_STATE based on what QEMU thinks it is */ static int kvm_arm_sync_mpstate_to_kvm(ARMCPU *cpu) { if (cap_has_mp_state) { struct kvm_mp_state mp_state = { .mp_state = (cpu->power_state == PSCI_OFF) ? KVM_MP_STATE_STOPPED : KVM_MP_STATE_RUNNABLE }; return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); } return 0; } /* * Sync the KVM MP_STATE into QEMU */ static int kvm_arm_sync_mpstate_to_qemu(ARMCPU *cpu) { if (cap_has_mp_state) { struct kvm_mp_state mp_state; int ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MP_STATE, &mp_state); if (ret) { return ret; } cpu->power_state = (mp_state.mp_state == KVM_MP_STATE_STOPPED) ? PSCI_OFF : PSCI_ON; } return 0; } /** * kvm_arm_get_virtual_time: * @cpu: ARMCPU * * Gets the VCPU's virtual counter and stores it in the KVM CPU state. */ static void kvm_arm_get_virtual_time(ARMCPU *cpu) { int ret; if (cpu->kvm_vtime_dirty) { return; } ret = kvm_get_one_reg(CPU(cpu), KVM_REG_ARM_TIMER_CNT, &cpu->kvm_vtime); if (ret) { error_report("Failed to get KVM_REG_ARM_TIMER_CNT"); abort(); } cpu->kvm_vtime_dirty = true; } /** * kvm_arm_put_virtual_time: * @cpu: ARMCPU * * Sets the VCPU's virtual counter to the value stored in the KVM CPU state. */ static void kvm_arm_put_virtual_time(ARMCPU *cpu) { int ret; if (!cpu->kvm_vtime_dirty) { return; } ret = kvm_set_one_reg(CPU(cpu), KVM_REG_ARM_TIMER_CNT, &cpu->kvm_vtime); if (ret) { error_report("Failed to set KVM_REG_ARM_TIMER_CNT"); abort(); } cpu->kvm_vtime_dirty = false; } /** * kvm_put_vcpu_events: * @cpu: ARMCPU * * Put VCPU related state to kvm. * * Returns: 0 if success else < 0 error code */ static int kvm_put_vcpu_events(ARMCPU *cpu) { CPUARMState *env = &cpu->env; struct kvm_vcpu_events events; int ret; if (!kvm_has_vcpu_events()) { return 0; } memset(&events, 0, sizeof(events)); events.exception.serror_pending = env->serror.pending; /* Inject SError to guest with specified syndrome if host kernel * supports it, otherwise inject SError without syndrome. */ if (cap_has_inject_serror_esr) { events.exception.serror_has_esr = env->serror.has_esr; events.exception.serror_esr = env->serror.esr; } ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_VCPU_EVENTS, &events); if (ret) { error_report("failed to put vcpu events"); } return ret; } /** * kvm_get_vcpu_events: * @cpu: ARMCPU * * Get VCPU related state from kvm. * * Returns: 0 if success else < 0 error code */ static int kvm_get_vcpu_events(ARMCPU *cpu) { CPUARMState *env = &cpu->env; struct kvm_vcpu_events events; int ret; if (!kvm_has_vcpu_events()) { return 0; } memset(&events, 0, sizeof(events)); ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_VCPU_EVENTS, &events); if (ret) { error_report("failed to get vcpu events"); return ret; } env->serror.pending = events.exception.serror_pending; env->serror.has_esr = events.exception.serror_has_esr; env->serror.esr = events.exception.serror_esr; return 0; } #define ARM64_REG_ESR_EL1 ARM64_SYS_REG(3, 0, 5, 2, 0) #define ARM64_REG_TCR_EL1 ARM64_SYS_REG(3, 0, 2, 0, 2) /* * ESR_EL1 * ISS encoding * AARCH64: DFSC, bits [5:0] * AARCH32: * TTBCR.EAE == 0 * FS[4] - DFSR[10] * FS[3:0] - DFSR[3:0] * TTBCR.EAE == 1 * FS, bits [5:0] */ #define ESR_DFSC(aarch64, lpae, v) \ ((aarch64 || (lpae)) ? ((v) & 0x3F) \ : (((v) >> 6) | ((v) & 0x1F))) #define ESR_DFSC_EXTABT(aarch64, lpae) \ ((aarch64) ? 0x10 : (lpae) ? 0x10 : 0x8) /** * kvm_arm_verify_ext_dabt_pending: * @cpu: ARMCPU * * Verify the fault status code wrt the Ext DABT injection * * Returns: true if the fault status code is as expected, false otherwise */ static bool kvm_arm_verify_ext_dabt_pending(ARMCPU *cpu) { CPUState *cs = CPU(cpu); uint64_t dfsr_val; if (!kvm_get_one_reg(cs, ARM64_REG_ESR_EL1, &dfsr_val)) { CPUARMState *env = &cpu->env; int aarch64_mode = arm_feature(env, ARM_FEATURE_AARCH64); int lpae = 0; if (!aarch64_mode) { uint64_t ttbcr; if (!kvm_get_one_reg(cs, ARM64_REG_TCR_EL1, &ttbcr)) { lpae = arm_feature(env, ARM_FEATURE_LPAE) && (ttbcr & TTBCR_EAE); } } /* * The verification here is based on the DFSC bits * of the ESR_EL1 reg only */ return (ESR_DFSC(aarch64_mode, lpae, dfsr_val) == ESR_DFSC_EXTABT(aarch64_mode, lpae)); } return false; } void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) { ARMCPU *cpu = ARM_CPU(cs); CPUARMState *env = &cpu->env; if (unlikely(env->ext_dabt_raised)) { /* * Verifying that the ext DABT has been properly injected, * otherwise risking indefinitely re-running the faulting instruction * Covering a very narrow case for kernels 5.5..5.5.4 * when injected abort was misconfigured to be * an IMPLEMENTATION DEFINED exception (for 32-bit EL1) */ if (!arm_feature(env, ARM_FEATURE_AARCH64) && unlikely(!kvm_arm_verify_ext_dabt_pending(cpu))) { error_report("Data abort exception with no valid ISS generated by " "guest memory access. KVM unable to emulate faulting " "instruction. Failed to inject an external data abort " "into the guest."); abort(); } /* Clear the status */ env->ext_dabt_raised = 0; } } MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) { ARMCPU *cpu; uint32_t switched_level; if (kvm_irqchip_in_kernel()) { /* * We only need to sync timer states with user-space interrupt * controllers, so return early and save cycles if we don't. */ return MEMTXATTRS_UNSPECIFIED; } cpu = ARM_CPU(cs); /* Synchronize our shadowed in-kernel device irq lines with the kvm ones */ if (run->s.regs.device_irq_level != cpu->device_irq_level) { switched_level = cpu->device_irq_level ^ run->s.regs.device_irq_level; bql_lock(); if (switched_level & KVM_ARM_DEV_EL1_VTIMER) { qemu_set_irq(cpu->gt_timer_outputs[GTIMER_VIRT], !!(run->s.regs.device_irq_level & KVM_ARM_DEV_EL1_VTIMER)); switched_level &= ~KVM_ARM_DEV_EL1_VTIMER; } if (switched_level & KVM_ARM_DEV_EL1_PTIMER) { qemu_set_irq(cpu->gt_timer_outputs[GTIMER_PHYS], !!(run->s.regs.device_irq_level & KVM_ARM_DEV_EL1_PTIMER)); switched_level &= ~KVM_ARM_DEV_EL1_PTIMER; } if (switched_level & KVM_ARM_DEV_PMU) { qemu_set_irq(cpu->pmu_interrupt, !!(run->s.regs.device_irq_level & KVM_ARM_DEV_PMU)); switched_level &= ~KVM_ARM_DEV_PMU; } if (switched_level) { qemu_log_mask(LOG_UNIMP, "%s: unhandled in-kernel device IRQ %x\n", __func__, switched_level); } /* We also mark unknown levels as processed to not waste cycles */ cpu->device_irq_level = run->s.regs.device_irq_level; bql_unlock(); } return MEMTXATTRS_UNSPECIFIED; } static void kvm_arm_vm_state_change(void *opaque, bool running, RunState state) { ARMCPU *cpu = opaque; if (running) { if (cpu->kvm_adjvtime) { kvm_arm_put_virtual_time(cpu); } } else { if (cpu->kvm_adjvtime) { kvm_arm_get_virtual_time(cpu); } } } /** * kvm_arm_handle_dabt_nisv: * @cpu: ARMCPU * @esr_iss: ISS encoding (limited) for the exception from Data Abort * ISV bit set to '0b0' -> no valid instruction syndrome * @fault_ipa: faulting address for the synchronous data abort * * Returns: 0 if the exception has been handled, < 0 otherwise */ static int kvm_arm_handle_dabt_nisv(ARMCPU *cpu, uint64_t esr_iss, uint64_t fault_ipa) { CPUARMState *env = &cpu->env; /* * Request KVM to inject the external data abort into the guest */ if (cap_has_inject_ext_dabt) { struct kvm_vcpu_events events = { }; /* * The external data abort event will be handled immediately by KVM * using the address fault that triggered the exit on given VCPU. * Requesting injection of the external data abort does not rely * on any other VCPU state. Therefore, in this particular case, the VCPU * synchronization can be exceptionally skipped. */ events.exception.ext_dabt_pending = 1; /* KVM_CAP_ARM_INJECT_EXT_DABT implies KVM_CAP_VCPU_EVENTS */ if (!kvm_vcpu_ioctl(CPU(cpu), KVM_SET_VCPU_EVENTS, &events)) { env->ext_dabt_raised = 1; return 0; } } else { error_report("Data abort exception triggered by guest memory access " "at physical address: 0x" TARGET_FMT_lx, (target_ulong)fault_ipa); error_printf("KVM unable to emulate faulting instruction.\n"); } return -1; } /** * kvm_arm_handle_debug: * @cpu: ARMCPU * @debug_exit: debug part of the KVM exit structure * * Returns: TRUE if the debug exception was handled. * * See v8 ARM ARM D7.2.27 ESR_ELx, Exception Syndrome Register * * To minimise translating between kernel and user-space the kernel * ABI just provides user-space with the full exception syndrome * register value to be decoded in QEMU. */ static bool kvm_arm_handle_debug(ARMCPU *cpu, struct kvm_debug_exit_arch *debug_exit) { int hsr_ec = syn_get_ec(debug_exit->hsr); CPUState *cs = CPU(cpu); CPUARMState *env = &cpu->env; /* Ensure PC is synchronised */ kvm_cpu_synchronize_state(cs); switch (hsr_ec) { case EC_SOFTWARESTEP: if (cs->singlestep_enabled) { return true; } else { /* * The kernel should have suppressed the guest's ability to * single step at this point so something has gone wrong. */ error_report("%s: guest single-step while debugging unsupported" " (%"PRIx64", %"PRIx32")", __func__, env->pc, debug_exit->hsr); return false; } break; case EC_AA64_BKPT: if (kvm_find_sw_breakpoint(cs, env->pc)) { return true; } break; case EC_BREAKPOINT: if (find_hw_breakpoint(cs, env->pc)) { return true; } break; case EC_WATCHPOINT: { CPUWatchpoint *wp = find_hw_watchpoint(cs, debug_exit->far); if (wp) { cs->watchpoint_hit = wp; return true; } break; } default: error_report("%s: unhandled debug exit (%"PRIx32", %"PRIx64")", __func__, debug_exit->hsr, env->pc); } /* If we are not handling the debug exception it must belong to * the guest. Let's re-use the existing TCG interrupt code to set * everything up properly. */ cs->exception_index = EXCP_BKPT; env->exception.syndrome = debug_exit->hsr; env->exception.vaddress = debug_exit->far; env->exception.target_el = 1; bql_lock(); arm_cpu_do_interrupt(cs); bql_unlock(); return false; } int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) { ARMCPU *cpu = ARM_CPU(cs); int ret = 0; switch (run->exit_reason) { case KVM_EXIT_DEBUG: if (kvm_arm_handle_debug(cpu, &run->debug.arch)) { ret = EXCP_DEBUG; } /* otherwise return to guest */ break; case KVM_EXIT_ARM_NISV: /* External DABT with no valid iss to decode */ ret = kvm_arm_handle_dabt_nisv(cpu, run->arm_nisv.esr_iss, run->arm_nisv.fault_ipa); break; default: qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n", __func__, run->exit_reason); break; } return ret; } bool kvm_arch_stop_on_emulation_error(CPUState *cs) { return true; } int kvm_arch_process_async_events(CPUState *cs) { return 0; } /** * kvm_arm_hw_debug_active: * @cpu: ARMCPU * * Return: TRUE if any hardware breakpoints in use. */ static bool kvm_arm_hw_debug_active(ARMCPU *cpu) { return ((cur_hw_wps > 0) || (cur_hw_bps > 0)); } /** * kvm_arm_copy_hw_debug_data: * @ptr: kvm_guest_debug_arch structure * * Copy the architecture specific debug registers into the * kvm_guest_debug ioctl structure. */ static void kvm_arm_copy_hw_debug_data(struct kvm_guest_debug_arch *ptr) { int i; memset(ptr, 0, sizeof(struct kvm_guest_debug_arch)); for (i = 0; i < max_hw_wps; i++) { HWWatchpoint *wp = get_hw_wp(i); ptr->dbg_wcr[i] = wp->wcr; ptr->dbg_wvr[i] = wp->wvr; } for (i = 0; i < max_hw_bps; i++) { HWBreakpoint *bp = get_hw_bp(i); ptr->dbg_bcr[i] = bp->bcr; ptr->dbg_bvr[i] = bp->bvr; } } void kvm_arch_update_guest_debug(CPUState *cs, struct kvm_guest_debug *dbg) { if (kvm_sw_breakpoints_active(cs)) { dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; } if (kvm_arm_hw_debug_active(ARM_CPU(cs))) { dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW; kvm_arm_copy_hw_debug_data(&dbg->arch); } } void kvm_arch_init_irq_routing(KVMState *s) { } int kvm_arch_irqchip_create(KVMState *s) { if (kvm_kernel_irqchip_split()) { error_report("-machine kernel_irqchip=split is not supported on ARM."); exit(1); } /* If we can create the VGIC using the newer device control API, we * let the device do this when it initializes itself, otherwise we * fall back to the old API */ return kvm_check_extension(s, KVM_CAP_DEVICE_CTRL); } int kvm_arm_vgic_probe(void) { int val = 0; if (kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V3, true) == 0) { val |= KVM_ARM_VGIC_V3; } if (kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V2, true) == 0) { val |= KVM_ARM_VGIC_V2; } return val; } int kvm_arm_set_irq(int cpu, int irqtype, int irq, int level) { int kvm_irq = (irqtype << KVM_ARM_IRQ_TYPE_SHIFT) | irq; int cpu_idx1 = cpu % 256; int cpu_idx2 = cpu / 256; kvm_irq |= (cpu_idx1 << KVM_ARM_IRQ_VCPU_SHIFT) | (cpu_idx2 << KVM_ARM_IRQ_VCPU2_SHIFT); return kvm_set_irq(kvm_state, kvm_irq, !!level); } int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, uint64_t address, uint32_t data, PCIDevice *dev) { AddressSpace *as = pci_device_iommu_address_space(dev); hwaddr xlat, len, doorbell_gpa; MemoryRegionSection mrs; MemoryRegion *mr; if (as == &address_space_memory) { return 0; } /* MSI doorbell address is translated by an IOMMU */ RCU_READ_LOCK_GUARD(); mr = address_space_translate(as, address, &xlat, &len, true, MEMTXATTRS_UNSPECIFIED); if (!mr) { return 1; } mrs = memory_region_find(mr, xlat, 1); if (!mrs.mr) { return 1; } doorbell_gpa = mrs.offset_within_address_space; memory_region_unref(mrs.mr); route->u.msi.address_lo = doorbell_gpa; route->u.msi.address_hi = doorbell_gpa >> 32; trace_kvm_arm_fixup_msi_route(address, doorbell_gpa); return 0; } int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, int vector, PCIDevice *dev) { return 0; } int kvm_arch_release_virq_post(int virq) { return 0; } int kvm_arch_msi_data_to_gsi(uint32_t data) { return (data - 32) & 0xffff; } static void kvm_arch_get_eager_split_size(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { KVMState *s = KVM_STATE(obj); uint64_t value = s->kvm_eager_split_size; visit_type_size(v, name, &value, errp); } static void kvm_arch_set_eager_split_size(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { KVMState *s = KVM_STATE(obj); uint64_t value; if (s->fd != -1) { error_setg(errp, "Unable to set early-split-size after KVM has been initialized"); return; } if (!visit_type_size(v, name, &value, errp)) { return; } if (value && !is_power_of_2(value)) { error_setg(errp, "early-split-size must be a power of two"); return; } s->kvm_eager_split_size = value; } void kvm_arch_accel_class_init(ObjectClass *oc) { object_class_property_add(oc, "eager-split-size", "size", kvm_arch_get_eager_split_size, kvm_arch_set_eager_split_size, NULL, NULL); object_class_property_set_description(oc, "eager-split-size", "Eager Page Split chunk size for hugepages. (default: 0, disabled)"); } int kvm_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type) { switch (type) { case GDB_BREAKPOINT_HW: return insert_hw_breakpoint(addr); break; case GDB_WATCHPOINT_READ: case GDB_WATCHPOINT_WRITE: case GDB_WATCHPOINT_ACCESS: return insert_hw_watchpoint(addr, len, type); default: return -ENOSYS; } } int kvm_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type) { switch (type) { case GDB_BREAKPOINT_HW: return delete_hw_breakpoint(addr); case GDB_WATCHPOINT_READ: case GDB_WATCHPOINT_WRITE: case GDB_WATCHPOINT_ACCESS: return delete_hw_watchpoint(addr, len, type); default: return -ENOSYS; } } void kvm_arch_remove_all_hw_breakpoints(void) { if (cur_hw_wps > 0) { g_array_remove_range(hw_watchpoints, 0, cur_hw_wps); } if (cur_hw_bps > 0) { g_array_remove_range(hw_breakpoints, 0, cur_hw_bps); } } static bool kvm_arm_set_device_attr(ARMCPU *cpu, struct kvm_device_attr *attr, const char *name) { int err; err = kvm_vcpu_ioctl(CPU(cpu), KVM_HAS_DEVICE_ATTR, attr); if (err != 0) { error_report("%s: KVM_HAS_DEVICE_ATTR: %s", name, strerror(-err)); return false; } err = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_DEVICE_ATTR, attr); if (err != 0) { error_report("%s: KVM_SET_DEVICE_ATTR: %s", name, strerror(-err)); return false; } return true; } void kvm_arm_pmu_init(ARMCPU *cpu) { struct kvm_device_attr attr = { .group = KVM_ARM_VCPU_PMU_V3_CTRL, .attr = KVM_ARM_VCPU_PMU_V3_INIT, }; if (!cpu->has_pmu) { return; } if (!kvm_arm_set_device_attr(cpu, &attr, "PMU")) { error_report("failed to init PMU"); abort(); } } void kvm_arm_pmu_set_irq(ARMCPU *cpu, int irq) { struct kvm_device_attr attr = { .group = KVM_ARM_VCPU_PMU_V3_CTRL, .addr = (intptr_t)&irq, .attr = KVM_ARM_VCPU_PMU_V3_IRQ, }; if (!cpu->has_pmu) { return; } if (!kvm_arm_set_device_attr(cpu, &attr, "PMU")) { error_report("failed to set irq for PMU"); abort(); } } void kvm_arm_pvtime_init(ARMCPU *cpu, uint64_t ipa) { struct kvm_device_attr attr = { .group = KVM_ARM_VCPU_PVTIME_CTRL, .attr = KVM_ARM_VCPU_PVTIME_IPA, .addr = (uint64_t)&ipa, }; if (cpu->kvm_steal_time == ON_OFF_AUTO_OFF) { return; } if (!kvm_arm_set_device_attr(cpu, &attr, "PVTIME IPA")) { error_report("failed to init PVTIME IPA"); abort(); } } void kvm_arm_steal_time_finalize(ARMCPU *cpu, Error **errp) { bool has_steal_time = kvm_check_extension(kvm_state, KVM_CAP_STEAL_TIME); if (cpu->kvm_steal_time == ON_OFF_AUTO_AUTO) { if (!has_steal_time || !arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) { cpu->kvm_steal_time = ON_OFF_AUTO_OFF; } else { cpu->kvm_steal_time = ON_OFF_AUTO_ON; } } else if (cpu->kvm_steal_time == ON_OFF_AUTO_ON) { if (!has_steal_time) { error_setg(errp, "'kvm-steal-time' cannot be enabled " "on this host"); return; } else if (!arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) { /* * DEN0057A chapter 2 says "This specification only covers * systems in which the Execution state of the hypervisor * as well as EL1 of virtual machines is AArch64.". And, * to ensure that, the smc/hvc calls are only specified as * smc64/hvc64. */ error_setg(errp, "'kvm-steal-time' cannot be enabled " "for AArch32 guests"); return; } } } bool kvm_arm_aarch32_supported(void) { return kvm_check_extension(kvm_state, KVM_CAP_ARM_EL1_32BIT); } bool kvm_arm_sve_supported(void) { return kvm_check_extension(kvm_state, KVM_CAP_ARM_SVE); } bool kvm_arm_mte_supported(void) { return kvm_check_extension(kvm_state, KVM_CAP_ARM_MTE); } QEMU_BUILD_BUG_ON(KVM_ARM64_SVE_VQ_MIN != 1); uint32_t kvm_arm_sve_get_vls(ARMCPU *cpu) { /* Only call this function if kvm_arm_sve_supported() returns true. */ static uint64_t vls[KVM_ARM64_SVE_VLS_WORDS]; static bool probed; uint32_t vq = 0; int i; /* * KVM ensures all host CPUs support the same set of vector lengths. * So we only need to create the scratch VCPUs once and then cache * the results. */ if (!probed) { struct kvm_vcpu_init init = { .target = -1, .features[0] = (1 << KVM_ARM_VCPU_SVE), }; struct kvm_one_reg reg = { .id = KVM_REG_ARM64_SVE_VLS, .addr = (uint64_t)&vls[0], }; int fdarray[3], ret; probed = true; if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, &init)) { error_report("failed to create scratch VCPU with SVE enabled"); abort(); } ret = ioctl(fdarray[2], KVM_GET_ONE_REG, ®); kvm_arm_destroy_scratch_host_vcpu(fdarray); if (ret) { error_report("failed to get KVM_REG_ARM64_SVE_VLS: %s", strerror(errno)); abort(); } for (i = KVM_ARM64_SVE_VLS_WORDS - 1; i >= 0; --i) { if (vls[i]) { vq = 64 - clz64(vls[i]) + i * 64; break; } } if (vq > ARM_MAX_VQ) { warn_report("KVM supports vector lengths larger than " "QEMU can enable"); vls[0] &= MAKE_64BIT_MASK(0, ARM_MAX_VQ); } } return vls[0]; } static int kvm_arm_sve_set_vls(ARMCPU *cpu) { uint64_t vls[KVM_ARM64_SVE_VLS_WORDS] = { cpu->sve_vq.map }; assert(cpu->sve_max_vq <= KVM_ARM64_SVE_VQ_MAX); return kvm_set_one_reg(CPU(cpu), KVM_REG_ARM64_SVE_VLS, &vls[0]); } #define ARM_CPU_ID_MPIDR 3, 0, 0, 0, 5 int kvm_arch_init_vcpu(CPUState *cs) { int ret; uint64_t mpidr; ARMCPU *cpu = ARM_CPU(cs); CPUARMState *env = &cpu->env; uint64_t psciver; if (cpu->kvm_target == QEMU_KVM_ARM_TARGET_NONE || !object_dynamic_cast(OBJECT(cpu), TYPE_AARCH64_CPU)) { error_report("KVM is not supported for this guest CPU type"); return -EINVAL; } qemu_add_vm_change_state_handler(kvm_arm_vm_state_change, cpu); /* Determine init features for this CPU */ memset(cpu->kvm_init_features, 0, sizeof(cpu->kvm_init_features)); if (cs->start_powered_off) { cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF; } if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) { cpu->psci_version = QEMU_PSCI_VERSION_0_2; cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2; } if (!arm_feature(env, ARM_FEATURE_AARCH64)) { cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_EL1_32BIT; } if (cpu->has_pmu) { cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_PMU_V3; } if (cpu_isar_feature(aa64_sve, cpu)) { assert(kvm_arm_sve_supported()); cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_SVE; } if (cpu_isar_feature(aa64_pauth, cpu)) { cpu->kvm_init_features[0] |= (1 << KVM_ARM_VCPU_PTRAUTH_ADDRESS | 1 << KVM_ARM_VCPU_PTRAUTH_GENERIC); } /* Do KVM_ARM_VCPU_INIT ioctl */ ret = kvm_arm_vcpu_init(cpu); if (ret) { return ret; } if (cpu_isar_feature(aa64_sve, cpu)) { ret = kvm_arm_sve_set_vls(cpu); if (ret) { return ret; } ret = kvm_arm_vcpu_finalize(cpu, KVM_ARM_VCPU_SVE); if (ret) { return ret; } } /* * KVM reports the exact PSCI version it is implementing via a * special sysreg. If it is present, use its contents to determine * what to report to the guest in the dtb (it is the PSCI version, * in the same 15-bits major 16-bits minor format that PSCI_VERSION * returns). */ if (!kvm_get_one_reg(cs, KVM_REG_ARM_PSCI_VERSION, &psciver)) { cpu->psci_version = psciver; } /* * When KVM is in use, PSCI is emulated in-kernel and not by qemu. * Currently KVM has its own idea about MPIDR assignment, so we * override our defaults with what we get from KVM. */ ret = kvm_get_one_reg(cs, ARM64_SYS_REG(ARM_CPU_ID_MPIDR), &mpidr); if (ret) { return ret; } cpu->mp_affinity = mpidr & ARM64_AFFINITY_MASK; return kvm_arm_init_cpreg_list(cpu); } int kvm_arch_destroy_vcpu(CPUState *cs) { return 0; } /* Callers must hold the iothread mutex lock */ static void kvm_inject_arm_sea(CPUState *c) { ARMCPU *cpu = ARM_CPU(c); CPUARMState *env = &cpu->env; uint32_t esr; bool same_el; c->exception_index = EXCP_DATA_ABORT; env->exception.target_el = 1; /* * Set the DFSC to synchronous external abort and set FnV to not valid, * this will tell guest the FAR_ELx is UNKNOWN for this abort. */ same_el = arm_current_el(env) == env->exception.target_el; esr = syn_data_abort_no_iss(same_el, 1, 0, 0, 0, 0, 0x10); env->exception.syndrome = esr; arm_cpu_do_interrupt(c); } #define AARCH64_CORE_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \ KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(x)) #define AARCH64_SIMD_CORE_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U128 | \ KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(x)) #define AARCH64_SIMD_CTRL_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U32 | \ KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(x)) static int kvm_arch_put_fpsimd(CPUState *cs) { CPUARMState *env = &ARM_CPU(cs)->env; int i, ret; for (i = 0; i < 32; i++) { uint64_t *q = aa64_vfp_qreg(env, i); #if HOST_BIG_ENDIAN uint64_t fp_val[2] = { q[1], q[0] }; ret = kvm_set_one_reg(cs, AARCH64_SIMD_CORE_REG(fp_regs.vregs[i]), fp_val); #else ret = kvm_set_one_reg(cs, AARCH64_SIMD_CORE_REG(fp_regs.vregs[i]), q); #endif if (ret) { return ret; } } return 0; } /* * KVM SVE registers come in slices where ZREGs have a slice size of 2048 bits * and PREGS and the FFR have a slice size of 256 bits. However we simply hard * code the slice index to zero for now as it's unlikely we'll need more than * one slice for quite some time. */ static int kvm_arch_put_sve(CPUState *cs) { ARMCPU *cpu = ARM_CPU(cs); CPUARMState *env = &cpu->env; uint64_t tmp[ARM_MAX_VQ * 2]; uint64_t *r; int n, ret; for (n = 0; n < KVM_ARM64_SVE_NUM_ZREGS; ++n) { r = sve_bswap64(tmp, &env->vfp.zregs[n].d[0], cpu->sve_max_vq * 2); ret = kvm_set_one_reg(cs, KVM_REG_ARM64_SVE_ZREG(n, 0), r); if (ret) { return ret; } } for (n = 0; n < KVM_ARM64_SVE_NUM_PREGS; ++n) { r = sve_bswap64(tmp, r = &env->vfp.pregs[n].p[0], DIV_ROUND_UP(cpu->sve_max_vq * 2, 8)); ret = kvm_set_one_reg(cs, KVM_REG_ARM64_SVE_PREG(n, 0), r); if (ret) { return ret; } } r = sve_bswap64(tmp, &env->vfp.pregs[FFR_PRED_NUM].p[0], DIV_ROUND_UP(cpu->sve_max_vq * 2, 8)); ret = kvm_set_one_reg(cs, KVM_REG_ARM64_SVE_FFR(0), r); if (ret) { return ret; } return 0; } int kvm_arch_put_registers(CPUState *cs, int level, Error **errp) { uint64_t val; uint32_t fpr; int i, ret; unsigned int el; ARMCPU *cpu = ARM_CPU(cs); CPUARMState *env = &cpu->env; /* If we are in AArch32 mode then we need to copy the AArch32 regs to the * AArch64 registers before pushing them out to 64-bit KVM. */ if (!is_a64(env)) { aarch64_sync_32_to_64(env); } for (i = 0; i < 31; i++) { ret = kvm_set_one_reg(cs, AARCH64_CORE_REG(regs.regs[i]), &env->xregs[i]); if (ret) { return ret; } } /* KVM puts SP_EL0 in regs.sp and SP_EL1 in regs.sp_el1. On the * QEMU side we keep the current SP in xregs[31] as well. */ aarch64_save_sp(env, 1); ret = kvm_set_one_reg(cs, AARCH64_CORE_REG(regs.sp), &env->sp_el[0]); if (ret) { return ret; } ret = kvm_set_one_reg(cs, AARCH64_CORE_REG(sp_el1), &env->sp_el[1]); if (ret) { return ret; } /* Note that KVM thinks pstate is 64 bit but we use a uint32_t */ if (is_a64(env)) { val = pstate_read(env); } else { val = cpsr_read(env); } ret = kvm_set_one_reg(cs, AARCH64_CORE_REG(regs.pstate), &val); if (ret) { return ret; } ret = kvm_set_one_reg(cs, AARCH64_CORE_REG(regs.pc), &env->pc); if (ret) { return ret; } ret = kvm_set_one_reg(cs, AARCH64_CORE_REG(elr_el1), &env->elr_el[1]); if (ret) { return ret; } /* Saved Program State Registers * * Before we restore from the banked_spsr[] array we need to * ensure that any modifications to env->spsr are correctly * reflected in the banks. */ el = arm_current_el(env); if (el > 0 && !is_a64(env)) { i = bank_number(env->uncached_cpsr & CPSR_M); env->banked_spsr[i] = env->spsr; } /* KVM 0-4 map to QEMU banks 1-5 */ for (i = 0; i < KVM_NR_SPSR; i++) { ret = kvm_set_one_reg(cs, AARCH64_CORE_REG(spsr[i]), &env->banked_spsr[i + 1]); if (ret) { return ret; } } if (cpu_isar_feature(aa64_sve, cpu)) { ret = kvm_arch_put_sve(cs); } else { ret = kvm_arch_put_fpsimd(cs); } if (ret) { return ret; } fpr = vfp_get_fpsr(env); ret = kvm_set_one_reg(cs, AARCH64_SIMD_CTRL_REG(fp_regs.fpsr), &fpr); if (ret) { return ret; } fpr = vfp_get_fpcr(env); ret = kvm_set_one_reg(cs, AARCH64_SIMD_CTRL_REG(fp_regs.fpcr), &fpr); if (ret) { return ret; } write_cpustate_to_list(cpu, true); if (!write_list_to_kvmstate(cpu, level)) { return -EINVAL; } /* * Setting VCPU events should be triggered after syncing the registers * to avoid overwriting potential changes made by KVM upon calling * KVM_SET_VCPU_EVENTS ioctl */ ret = kvm_put_vcpu_events(cpu); if (ret) { return ret; } return kvm_arm_sync_mpstate_to_kvm(cpu); } static int kvm_arch_get_fpsimd(CPUState *cs) { CPUARMState *env = &ARM_CPU(cs)->env; int i, ret; for (i = 0; i < 32; i++) { uint64_t *q = aa64_vfp_qreg(env, i); ret = kvm_get_one_reg(cs, AARCH64_SIMD_CORE_REG(fp_regs.vregs[i]), q); if (ret) { return ret; } else { #if HOST_BIG_ENDIAN uint64_t t; t = q[0], q[0] = q[1], q[1] = t; #endif } } return 0; } /* * KVM SVE registers come in slices where ZREGs have a slice size of 2048 bits * and PREGS and the FFR have a slice size of 256 bits. However we simply hard * code the slice index to zero for now as it's unlikely we'll need more than * one slice for quite some time. */ static int kvm_arch_get_sve(CPUState *cs) { ARMCPU *cpu = ARM_CPU(cs); CPUARMState *env = &cpu->env; uint64_t *r; int n, ret; for (n = 0; n < KVM_ARM64_SVE_NUM_ZREGS; ++n) { r = &env->vfp.zregs[n].d[0]; ret = kvm_get_one_reg(cs, KVM_REG_ARM64_SVE_ZREG(n, 0), r); if (ret) { return ret; } sve_bswap64(r, r, cpu->sve_max_vq * 2); } for (n = 0; n < KVM_ARM64_SVE_NUM_PREGS; ++n) { r = &env->vfp.pregs[n].p[0]; ret = kvm_get_one_reg(cs, KVM_REG_ARM64_SVE_PREG(n, 0), r); if (ret) { return ret; } sve_bswap64(r, r, DIV_ROUND_UP(cpu->sve_max_vq * 2, 8)); } r = &env->vfp.pregs[FFR_PRED_NUM].p[0]; ret = kvm_get_one_reg(cs, KVM_REG_ARM64_SVE_FFR(0), r); if (ret) { return ret; } sve_bswap64(r, r, DIV_ROUND_UP(cpu->sve_max_vq * 2, 8)); return 0; } int kvm_arch_get_registers(CPUState *cs, Error **errp) { uint64_t val; unsigned int el; uint32_t fpr; int i, ret; ARMCPU *cpu = ARM_CPU(cs); CPUARMState *env = &cpu->env; for (i = 0; i < 31; i++) { ret = kvm_get_one_reg(cs, AARCH64_CORE_REG(regs.regs[i]), &env->xregs[i]); if (ret) { return ret; } } ret = kvm_get_one_reg(cs, AARCH64_CORE_REG(regs.sp), &env->sp_el[0]); if (ret) { return ret; } ret = kvm_get_one_reg(cs, AARCH64_CORE_REG(sp_el1), &env->sp_el[1]); if (ret) { return ret; } ret = kvm_get_one_reg(cs, AARCH64_CORE_REG(regs.pstate), &val); if (ret) { return ret; } env->aarch64 = ((val & PSTATE_nRW) == 0); if (is_a64(env)) { pstate_write(env, val); } else { cpsr_write(env, val, 0xffffffff, CPSRWriteRaw); } /* KVM puts SP_EL0 in regs.sp and SP_EL1 in regs.sp_el1. On the * QEMU side we keep the current SP in xregs[31] as well. */ aarch64_restore_sp(env, 1); ret = kvm_get_one_reg(cs, AARCH64_CORE_REG(regs.pc), &env->pc); if (ret) { return ret; } /* If we are in AArch32 mode then we need to sync the AArch32 regs with the * incoming AArch64 regs received from 64-bit KVM. * We must perform this after all of the registers have been acquired from * the kernel. */ if (!is_a64(env)) { aarch64_sync_64_to_32(env); } ret = kvm_get_one_reg(cs, AARCH64_CORE_REG(elr_el1), &env->elr_el[1]); if (ret) { return ret; } /* Fetch the SPSR registers * * KVM SPSRs 0-4 map to QEMU banks 1-5 */ for (i = 0; i < KVM_NR_SPSR; i++) { ret = kvm_get_one_reg(cs, AARCH64_CORE_REG(spsr[i]), &env->banked_spsr[i + 1]); if (ret) { return ret; } } el = arm_current_el(env); if (el > 0 && !is_a64(env)) { i = bank_number(env->uncached_cpsr & CPSR_M); env->spsr = env->banked_spsr[i]; } if (cpu_isar_feature(aa64_sve, cpu)) { ret = kvm_arch_get_sve(cs); } else { ret = kvm_arch_get_fpsimd(cs); } if (ret) { return ret; } ret = kvm_get_one_reg(cs, AARCH64_SIMD_CTRL_REG(fp_regs.fpsr), &fpr); if (ret) { return ret; } vfp_set_fpsr(env, fpr); ret = kvm_get_one_reg(cs, AARCH64_SIMD_CTRL_REG(fp_regs.fpcr), &fpr); if (ret) { return ret; } vfp_set_fpcr(env, fpr); ret = kvm_get_vcpu_events(cpu); if (ret) { return ret; } if (!write_kvmstate_to_list(cpu)) { return -EINVAL; } /* Note that it's OK to have registers which aren't in CPUState, * so we can ignore a failure return here. */ write_list_to_cpustate(cpu); ret = kvm_arm_sync_mpstate_to_qemu(cpu); /* TODO: other registers */ return ret; } void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr) { ram_addr_t ram_addr; hwaddr paddr; assert(code == BUS_MCEERR_AR || code == BUS_MCEERR_AO); if (acpi_ghes_present() && addr) { ram_addr = qemu_ram_addr_from_host(addr); if (ram_addr != RAM_ADDR_INVALID && kvm_physical_memory_addr_from_host(c->kvm_state, addr, &paddr)) { kvm_hwpoison_page_add(ram_addr); /* * If this is a BUS_MCEERR_AR, we know we have been called * synchronously from the vCPU thread, so we can easily * synchronize the state and inject an error. * * TODO: we currently don't tell the guest at all about * BUS_MCEERR_AO. In that case we might either be being * called synchronously from the vCPU thread, or a bit * later from the main thread, so doing the injection of * the error would be more complicated. */ if (code == BUS_MCEERR_AR) { kvm_cpu_synchronize_state(c); if (!acpi_ghes_record_errors(ACPI_HEST_SRC_ID_SEA, paddr)) { kvm_inject_arm_sea(c); } else { error_report("failed to record the error"); abort(); } } return; } if (code == BUS_MCEERR_AO) { error_report("Hardware memory error at addr %p for memory used by " "QEMU itself instead of guest system!", addr); } } if (code == BUS_MCEERR_AR) { error_report("Hardware memory error!"); exit(1); } } /* C6.6.29 BRK instruction */ static const uint32_t brk_insn = 0xd4200000; int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) { if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) || cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&brk_insn, 4, 1)) { return -EINVAL; } return 0; } int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) { static uint32_t brk; if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&brk, 4, 0) || brk != brk_insn || cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 4, 1)) { return -EINVAL; } return 0; } void kvm_arm_enable_mte(Object *cpuobj, Error **errp) { static bool tried_to_enable; static bool succeeded_to_enable; Error *mte_migration_blocker = NULL; ARMCPU *cpu = ARM_CPU(cpuobj); int ret; if (!tried_to_enable) { /* * MTE on KVM is enabled on a per-VM basis (and retrying doesn't make * sense), and we only want a single migration blocker as well. */ tried_to_enable = true; ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_ARM_MTE, 0); if (ret) { error_setg_errno(errp, -ret, "Failed to enable KVM_CAP_ARM_MTE"); return; } /* TODO: Add migration support with MTE enabled */ error_setg(&mte_migration_blocker, "Live migration disabled due to MTE enabled"); if (migrate_add_blocker(&mte_migration_blocker, errp)) { error_free(mte_migration_blocker); return; } succeeded_to_enable = true; } if (succeeded_to_enable) { cpu->kvm_mte = true; } }