| /* |
| * QEMU KVM support |
| * |
| * Copyright (C) 2006-2008 Qumranet Technologies |
| * Copyright IBM, Corp. 2008 |
| * |
| * Authors: |
| * Anthony Liguori <aliguori@us.ibm.com> |
| * |
| * 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 <sys/types.h> |
| #include <sys/ioctl.h> |
| #include <sys/mman.h> |
| #include <sys/utsname.h> |
| |
| #include <linux/kvm.h> |
| #include <linux/kvm_para.h> |
| |
| #include "qemu-common.h" |
| #include "sysemu.h" |
| #include "kvm.h" |
| #include "kvm_i386.h" |
| #include "cpu.h" |
| #include "gdbstub.h" |
| #include "host-utils.h" |
| #include "hw/pc.h" |
| #include "hw/apic.h" |
| #include "ioport.h" |
| #include "hyperv.h" |
| #include "hw/pci.h" |
| |
| //#define DEBUG_KVM |
| |
| #ifdef DEBUG_KVM |
| #define DPRINTF(fmt, ...) \ |
| do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| #else |
| #define DPRINTF(fmt, ...) \ |
| do { } while (0) |
| #endif |
| |
| #define MSR_KVM_WALL_CLOCK 0x11 |
| #define MSR_KVM_SYSTEM_TIME 0x12 |
| |
| #ifndef BUS_MCEERR_AR |
| #define BUS_MCEERR_AR 4 |
| #endif |
| #ifndef BUS_MCEERR_AO |
| #define BUS_MCEERR_AO 5 |
| #endif |
| |
| const KVMCapabilityInfo kvm_arch_required_capabilities[] = { |
| KVM_CAP_INFO(SET_TSS_ADDR), |
| KVM_CAP_INFO(EXT_CPUID), |
| KVM_CAP_INFO(MP_STATE), |
| KVM_CAP_LAST_INFO |
| }; |
| |
| static bool has_msr_star; |
| static bool has_msr_hsave_pa; |
| static bool has_msr_tsc_deadline; |
| static bool has_msr_async_pf_en; |
| static bool has_msr_pv_eoi_en; |
| static bool has_msr_misc_enable; |
| static int lm_capable_kernel; |
| |
| bool kvm_allows_irq0_override(void) |
| { |
| return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing(); |
| } |
| |
| static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) |
| { |
| struct kvm_cpuid2 *cpuid; |
| int r, size; |
| |
| size = sizeof(*cpuid) + max * sizeof(*cpuid->entries); |
| cpuid = (struct kvm_cpuid2 *)g_malloc0(size); |
| cpuid->nent = max; |
| r = kvm_ioctl(s, KVM_GET_SUPPORTED_CPUID, cpuid); |
| if (r == 0 && cpuid->nent >= max) { |
| r = -E2BIG; |
| } |
| if (r < 0) { |
| if (r == -E2BIG) { |
| g_free(cpuid); |
| return NULL; |
| } else { |
| fprintf(stderr, "KVM_GET_SUPPORTED_CPUID failed: %s\n", |
| strerror(-r)); |
| exit(1); |
| } |
| } |
| return cpuid; |
| } |
| |
| struct kvm_para_features { |
| int cap; |
| int feature; |
| } para_features[] = { |
| { KVM_CAP_CLOCKSOURCE, KVM_FEATURE_CLOCKSOURCE }, |
| { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY }, |
| { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP }, |
| { KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF }, |
| { -1, -1 } |
| }; |
| |
| static int get_para_features(KVMState *s) |
| { |
| int i, features = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(para_features) - 1; i++) { |
| if (kvm_check_extension(s, para_features[i].cap)) { |
| features |= (1 << para_features[i].feature); |
| } |
| } |
| |
| return features; |
| } |
| |
| |
| uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function, |
| uint32_t index, int reg) |
| { |
| struct kvm_cpuid2 *cpuid; |
| int i, max; |
| uint32_t ret = 0; |
| uint32_t cpuid_1_edx; |
| int has_kvm_features = 0; |
| |
| max = 1; |
| while ((cpuid = try_get_cpuid(s, max)) == NULL) { |
| max *= 2; |
| } |
| |
| for (i = 0; i < cpuid->nent; ++i) { |
| if (cpuid->entries[i].function == function && |
| cpuid->entries[i].index == index) { |
| if (cpuid->entries[i].function == KVM_CPUID_FEATURES) { |
| has_kvm_features = 1; |
| } |
| switch (reg) { |
| case R_EAX: |
| ret = cpuid->entries[i].eax; |
| break; |
| case R_EBX: |
| ret = cpuid->entries[i].ebx; |
| break; |
| case R_ECX: |
| ret = cpuid->entries[i].ecx; |
| break; |
| case R_EDX: |
| ret = cpuid->entries[i].edx; |
| switch (function) { |
| case 1: |
| /* KVM before 2.6.30 misreports the following features */ |
| ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA; |
| break; |
| case 0x80000001: |
| /* On Intel, kvm returns cpuid according to the Intel spec, |
| * so add missing bits according to the AMD spec: |
| */ |
| cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); |
| ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES; |
| break; |
| } |
| break; |
| } |
| } |
| } |
| |
| g_free(cpuid); |
| |
| /* fallback for older kernels */ |
| if (!has_kvm_features && (function == KVM_CPUID_FEATURES)) { |
| ret = get_para_features(s); |
| } |
| |
| return ret; |
| } |
| |
| typedef struct HWPoisonPage { |
| ram_addr_t ram_addr; |
| QLIST_ENTRY(HWPoisonPage) list; |
| } HWPoisonPage; |
| |
| static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list = |
| QLIST_HEAD_INITIALIZER(hwpoison_page_list); |
| |
| static void kvm_unpoison_all(void *param) |
| { |
| HWPoisonPage *page, *next_page; |
| |
| QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) { |
| QLIST_REMOVE(page, list); |
| qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE); |
| g_free(page); |
| } |
| } |
| |
| static void kvm_hwpoison_page_add(ram_addr_t ram_addr) |
| { |
| HWPoisonPage *page; |
| |
| QLIST_FOREACH(page, &hwpoison_page_list, list) { |
| if (page->ram_addr == ram_addr) { |
| return; |
| } |
| } |
| page = g_malloc(sizeof(HWPoisonPage)); |
| page->ram_addr = ram_addr; |
| QLIST_INSERT_HEAD(&hwpoison_page_list, page, list); |
| } |
| |
| static int kvm_get_mce_cap_supported(KVMState *s, uint64_t *mce_cap, |
| int *max_banks) |
| { |
| int r; |
| |
| r = kvm_check_extension(s, KVM_CAP_MCE); |
| if (r > 0) { |
| *max_banks = r; |
| return kvm_ioctl(s, KVM_X86_GET_MCE_CAP_SUPPORTED, mce_cap); |
| } |
| return -ENOSYS; |
| } |
| |
| static void kvm_mce_inject(X86CPU *cpu, hwaddr paddr, int code) |
| { |
| CPUX86State *env = &cpu->env; |
| uint64_t status = MCI_STATUS_VAL | MCI_STATUS_UC | MCI_STATUS_EN | |
| MCI_STATUS_MISCV | MCI_STATUS_ADDRV | MCI_STATUS_S; |
| uint64_t mcg_status = MCG_STATUS_MCIP; |
| |
| if (code == BUS_MCEERR_AR) { |
| status |= MCI_STATUS_AR | 0x134; |
| mcg_status |= MCG_STATUS_EIPV; |
| } else { |
| status |= 0xc0; |
| mcg_status |= MCG_STATUS_RIPV; |
| } |
| cpu_x86_inject_mce(NULL, cpu, 9, status, mcg_status, paddr, |
| (MCM_ADDR_PHYS << 6) | 0xc, |
| cpu_x86_support_mca_broadcast(env) ? |
| MCE_INJECT_BROADCAST : 0); |
| } |
| |
| static void hardware_memory_error(void) |
| { |
| fprintf(stderr, "Hardware memory error!\n"); |
| exit(1); |
| } |
| |
| int kvm_arch_on_sigbus_vcpu(CPUX86State *env, int code, void *addr) |
| { |
| X86CPU *cpu = x86_env_get_cpu(env); |
| ram_addr_t ram_addr; |
| hwaddr paddr; |
| |
| if ((env->mcg_cap & MCG_SER_P) && addr |
| && (code == BUS_MCEERR_AR || code == BUS_MCEERR_AO)) { |
| if (qemu_ram_addr_from_host(addr, &ram_addr) || |
| !kvm_physical_memory_addr_from_host(env->kvm_state, addr, &paddr)) { |
| fprintf(stderr, "Hardware memory error for memory used by " |
| "QEMU itself instead of guest system!\n"); |
| /* Hope we are lucky for AO MCE */ |
| if (code == BUS_MCEERR_AO) { |
| return 0; |
| } else { |
| hardware_memory_error(); |
| } |
| } |
| kvm_hwpoison_page_add(ram_addr); |
| kvm_mce_inject(cpu, paddr, code); |
| } else { |
| if (code == BUS_MCEERR_AO) { |
| return 0; |
| } else if (code == BUS_MCEERR_AR) { |
| hardware_memory_error(); |
| } else { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| int kvm_arch_on_sigbus(int code, void *addr) |
| { |
| if ((first_cpu->mcg_cap & MCG_SER_P) && addr && code == BUS_MCEERR_AO) { |
| ram_addr_t ram_addr; |
| hwaddr paddr; |
| |
| /* Hope we are lucky for AO MCE */ |
| if (qemu_ram_addr_from_host(addr, &ram_addr) || |
| !kvm_physical_memory_addr_from_host(first_cpu->kvm_state, addr, |
| &paddr)) { |
| fprintf(stderr, "Hardware memory error for memory used by " |
| "QEMU itself instead of guest system!: %p\n", addr); |
| return 0; |
| } |
| kvm_hwpoison_page_add(ram_addr); |
| kvm_mce_inject(x86_env_get_cpu(first_cpu), paddr, code); |
| } else { |
| if (code == BUS_MCEERR_AO) { |
| return 0; |
| } else if (code == BUS_MCEERR_AR) { |
| hardware_memory_error(); |
| } else { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static int kvm_inject_mce_oldstyle(CPUX86State *env) |
| { |
| if (!kvm_has_vcpu_events() && env->exception_injected == EXCP12_MCHK) { |
| unsigned int bank, bank_num = env->mcg_cap & 0xff; |
| struct kvm_x86_mce mce; |
| |
| env->exception_injected = -1; |
| |
| /* |
| * There must be at least one bank in use if an MCE is pending. |
| * Find it and use its values for the event injection. |
| */ |
| for (bank = 0; bank < bank_num; bank++) { |
| if (env->mce_banks[bank * 4 + 1] & MCI_STATUS_VAL) { |
| break; |
| } |
| } |
| assert(bank < bank_num); |
| |
| mce.bank = bank; |
| mce.status = env->mce_banks[bank * 4 + 1]; |
| mce.mcg_status = env->mcg_status; |
| mce.addr = env->mce_banks[bank * 4 + 2]; |
| mce.misc = env->mce_banks[bank * 4 + 3]; |
| |
| return kvm_vcpu_ioctl(env, KVM_X86_SET_MCE, &mce); |
| } |
| return 0; |
| } |
| |
| static void cpu_update_state(void *opaque, int running, RunState state) |
| { |
| CPUX86State *env = opaque; |
| |
| if (running) { |
| env->tsc_valid = false; |
| } |
| } |
| |
| int kvm_arch_init_vcpu(CPUX86State *env) |
| { |
| struct { |
| struct kvm_cpuid2 cpuid; |
| struct kvm_cpuid_entry2 entries[100]; |
| } QEMU_PACKED cpuid_data; |
| KVMState *s = env->kvm_state; |
| uint32_t limit, i, j, cpuid_i; |
| uint32_t unused; |
| struct kvm_cpuid_entry2 *c; |
| uint32_t signature[3]; |
| int r; |
| |
| env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); |
| |
| i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR; |
| j = env->cpuid_ext_features & CPUID_EXT_TSC_DEADLINE_TIMER; |
| env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX); |
| env->cpuid_ext_features |= i; |
| if (j && kvm_irqchip_in_kernel() && |
| kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) { |
| env->cpuid_ext_features |= CPUID_EXT_TSC_DEADLINE_TIMER; |
| } |
| |
| env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(s, 0x80000001, |
| 0, R_EDX); |
| env->cpuid_ext3_features &= kvm_arch_get_supported_cpuid(s, 0x80000001, |
| 0, R_ECX); |
| env->cpuid_svm_features &= kvm_arch_get_supported_cpuid(s, 0x8000000A, |
| 0, R_EDX); |
| |
| cpuid_i = 0; |
| |
| /* Paravirtualization CPUIDs */ |
| c = &cpuid_data.entries[cpuid_i++]; |
| memset(c, 0, sizeof(*c)); |
| c->function = KVM_CPUID_SIGNATURE; |
| if (!hyperv_enabled()) { |
| memcpy(signature, "KVMKVMKVM\0\0\0", 12); |
| c->eax = 0; |
| } else { |
| memcpy(signature, "Microsoft Hv", 12); |
| c->eax = HYPERV_CPUID_MIN; |
| } |
| c->ebx = signature[0]; |
| c->ecx = signature[1]; |
| c->edx = signature[2]; |
| |
| c = &cpuid_data.entries[cpuid_i++]; |
| memset(c, 0, sizeof(*c)); |
| c->function = KVM_CPUID_FEATURES; |
| c->eax = env->cpuid_kvm_features & |
| kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX); |
| |
| if (hyperv_enabled()) { |
| memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12); |
| c->eax = signature[0]; |
| |
| c = &cpuid_data.entries[cpuid_i++]; |
| memset(c, 0, sizeof(*c)); |
| c->function = HYPERV_CPUID_VERSION; |
| c->eax = 0x00001bbc; |
| c->ebx = 0x00060001; |
| |
| c = &cpuid_data.entries[cpuid_i++]; |
| memset(c, 0, sizeof(*c)); |
| c->function = HYPERV_CPUID_FEATURES; |
| if (hyperv_relaxed_timing_enabled()) { |
| c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE; |
| } |
| if (hyperv_vapic_recommended()) { |
| c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE; |
| c->eax |= HV_X64_MSR_APIC_ACCESS_AVAILABLE; |
| } |
| |
| c = &cpuid_data.entries[cpuid_i++]; |
| memset(c, 0, sizeof(*c)); |
| c->function = HYPERV_CPUID_ENLIGHTMENT_INFO; |
| if (hyperv_relaxed_timing_enabled()) { |
| c->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED; |
| } |
| if (hyperv_vapic_recommended()) { |
| c->eax |= HV_X64_APIC_ACCESS_RECOMMENDED; |
| } |
| c->ebx = hyperv_get_spinlock_retries(); |
| |
| c = &cpuid_data.entries[cpuid_i++]; |
| memset(c, 0, sizeof(*c)); |
| c->function = HYPERV_CPUID_IMPLEMENT_LIMITS; |
| c->eax = 0x40; |
| c->ebx = 0x40; |
| |
| c = &cpuid_data.entries[cpuid_i++]; |
| memset(c, 0, sizeof(*c)); |
| c->function = KVM_CPUID_SIGNATURE_NEXT; |
| memcpy(signature, "KVMKVMKVM\0\0\0", 12); |
| c->eax = 0; |
| c->ebx = signature[0]; |
| c->ecx = signature[1]; |
| c->edx = signature[2]; |
| } |
| |
| has_msr_async_pf_en = c->eax & (1 << KVM_FEATURE_ASYNC_PF); |
| |
| has_msr_pv_eoi_en = c->eax & (1 << KVM_FEATURE_PV_EOI); |
| |
| cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused); |
| |
| for (i = 0; i <= limit; i++) { |
| c = &cpuid_data.entries[cpuid_i++]; |
| |
| switch (i) { |
| case 2: { |
| /* Keep reading function 2 till all the input is received */ |
| int times; |
| |
| c->function = i; |
| c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC | |
| KVM_CPUID_FLAG_STATE_READ_NEXT; |
| cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); |
| times = c->eax & 0xff; |
| |
| for (j = 1; j < times; ++j) { |
| c = &cpuid_data.entries[cpuid_i++]; |
| c->function = i; |
| c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC; |
| cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); |
| } |
| break; |
| } |
| case 4: |
| case 0xb: |
| case 0xd: |
| for (j = 0; ; j++) { |
| if (i == 0xd && j == 64) { |
| break; |
| } |
| c->function = i; |
| c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| c->index = j; |
| cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); |
| |
| if (i == 4 && c->eax == 0) { |
| break; |
| } |
| if (i == 0xb && !(c->ecx & 0xff00)) { |
| break; |
| } |
| if (i == 0xd && c->eax == 0) { |
| continue; |
| } |
| c = &cpuid_data.entries[cpuid_i++]; |
| } |
| break; |
| default: |
| c->function = i; |
| c->flags = 0; |
| cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); |
| break; |
| } |
| } |
| cpu_x86_cpuid(env, 0x80000000, 0, &limit, &unused, &unused, &unused); |
| |
| for (i = 0x80000000; i <= limit; i++) { |
| c = &cpuid_data.entries[cpuid_i++]; |
| |
| c->function = i; |
| c->flags = 0; |
| cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); |
| } |
| |
| /* Call Centaur's CPUID instructions they are supported. */ |
| if (env->cpuid_xlevel2 > 0) { |
| env->cpuid_ext4_features &= |
| kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX); |
| cpu_x86_cpuid(env, 0xC0000000, 0, &limit, &unused, &unused, &unused); |
| |
| for (i = 0xC0000000; i <= limit; i++) { |
| c = &cpuid_data.entries[cpuid_i++]; |
| |
| c->function = i; |
| c->flags = 0; |
| cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); |
| } |
| } |
| |
| cpuid_data.cpuid.nent = cpuid_i; |
| |
| if (((env->cpuid_version >> 8)&0xF) >= 6 |
| && (env->cpuid_features&(CPUID_MCE|CPUID_MCA)) == (CPUID_MCE|CPUID_MCA) |
| && kvm_check_extension(env->kvm_state, KVM_CAP_MCE) > 0) { |
| uint64_t mcg_cap; |
| int banks; |
| int ret; |
| |
| ret = kvm_get_mce_cap_supported(env->kvm_state, &mcg_cap, &banks); |
| if (ret < 0) { |
| fprintf(stderr, "kvm_get_mce_cap_supported: %s", strerror(-ret)); |
| return ret; |
| } |
| |
| if (banks > MCE_BANKS_DEF) { |
| banks = MCE_BANKS_DEF; |
| } |
| mcg_cap &= MCE_CAP_DEF; |
| mcg_cap |= banks; |
| ret = kvm_vcpu_ioctl(env, KVM_X86_SETUP_MCE, &mcg_cap); |
| if (ret < 0) { |
| fprintf(stderr, "KVM_X86_SETUP_MCE: %s", strerror(-ret)); |
| return ret; |
| } |
| |
| env->mcg_cap = mcg_cap; |
| } |
| |
| qemu_add_vm_change_state_handler(cpu_update_state, env); |
| |
| cpuid_data.cpuid.padding = 0; |
| r = kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data); |
| if (r) { |
| return r; |
| } |
| |
| r = kvm_check_extension(env->kvm_state, KVM_CAP_TSC_CONTROL); |
| if (r && env->tsc_khz) { |
| r = kvm_vcpu_ioctl(env, KVM_SET_TSC_KHZ, env->tsc_khz); |
| if (r < 0) { |
| fprintf(stderr, "KVM_SET_TSC_KHZ failed\n"); |
| return r; |
| } |
| } |
| |
| if (kvm_has_xsave()) { |
| env->kvm_xsave_buf = qemu_memalign(4096, sizeof(struct kvm_xsave)); |
| } |
| |
| return 0; |
| } |
| |
| void kvm_arch_reset_vcpu(CPUX86State *env) |
| { |
| X86CPU *cpu = x86_env_get_cpu(env); |
| |
| env->exception_injected = -1; |
| env->interrupt_injected = -1; |
| env->xcr0 = 1; |
| if (kvm_irqchip_in_kernel()) { |
| env->mp_state = cpu_is_bsp(cpu) ? KVM_MP_STATE_RUNNABLE : |
| KVM_MP_STATE_UNINITIALIZED; |
| } else { |
| env->mp_state = KVM_MP_STATE_RUNNABLE; |
| } |
| } |
| |
| static int kvm_get_supported_msrs(KVMState *s) |
| { |
| static int kvm_supported_msrs; |
| int ret = 0; |
| |
| /* first time */ |
| if (kvm_supported_msrs == 0) { |
| struct kvm_msr_list msr_list, *kvm_msr_list; |
| |
| kvm_supported_msrs = -1; |
| |
| /* Obtain MSR list from KVM. These are the MSRs that we must |
| * save/restore */ |
| msr_list.nmsrs = 0; |
| ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, &msr_list); |
| if (ret < 0 && ret != -E2BIG) { |
| return ret; |
| } |
| /* Old kernel modules had a bug and could write beyond the provided |
| memory. Allocate at least a safe amount of 1K. */ |
| kvm_msr_list = g_malloc0(MAX(1024, sizeof(msr_list) + |
| msr_list.nmsrs * |
| sizeof(msr_list.indices[0]))); |
| |
| kvm_msr_list->nmsrs = msr_list.nmsrs; |
| ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); |
| if (ret >= 0) { |
| int i; |
| |
| for (i = 0; i < kvm_msr_list->nmsrs; i++) { |
| if (kvm_msr_list->indices[i] == MSR_STAR) { |
| has_msr_star = true; |
| continue; |
| } |
| if (kvm_msr_list->indices[i] == MSR_VM_HSAVE_PA) { |
| has_msr_hsave_pa = true; |
| continue; |
| } |
| if (kvm_msr_list->indices[i] == MSR_IA32_TSCDEADLINE) { |
| has_msr_tsc_deadline = true; |
| continue; |
| } |
| if (kvm_msr_list->indices[i] == MSR_IA32_MISC_ENABLE) { |
| has_msr_misc_enable = true; |
| continue; |
| } |
| } |
| } |
| |
| g_free(kvm_msr_list); |
| } |
| |
| return ret; |
| } |
| |
| int kvm_arch_init(KVMState *s) |
| { |
| QemuOptsList *list = qemu_find_opts("machine"); |
| uint64_t identity_base = 0xfffbc000; |
| uint64_t shadow_mem; |
| int ret; |
| struct utsname utsname; |
| |
| ret = kvm_get_supported_msrs(s); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| uname(&utsname); |
| lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0; |
| |
| /* |
| * On older Intel CPUs, KVM uses vm86 mode to emulate 16-bit code directly. |
| * In order to use vm86 mode, an EPT identity map and a TSS are needed. |
| * Since these must be part of guest physical memory, we need to allocate |
| * them, both by setting their start addresses in the kernel and by |
| * creating a corresponding e820 entry. We need 4 pages before the BIOS. |
| * |
| * Older KVM versions may not support setting the identity map base. In |
| * that case we need to stick with the default, i.e. a 256K maximum BIOS |
| * size. |
| */ |
| if (kvm_check_extension(s, KVM_CAP_SET_IDENTITY_MAP_ADDR)) { |
| /* Allows up to 16M BIOSes. */ |
| identity_base = 0xfeffc000; |
| |
| ret = kvm_vm_ioctl(s, KVM_SET_IDENTITY_MAP_ADDR, &identity_base); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| /* Set TSS base one page after EPT identity map. */ |
| ret = kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, identity_base + 0x1000); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| /* Tell fw_cfg to notify the BIOS to reserve the range. */ |
| ret = e820_add_entry(identity_base, 0x4000, E820_RESERVED); |
| if (ret < 0) { |
| fprintf(stderr, "e820_add_entry() table is full\n"); |
| return ret; |
| } |
| qemu_register_reset(kvm_unpoison_all, NULL); |
| |
| if (!QTAILQ_EMPTY(&list->head)) { |
| shadow_mem = qemu_opt_get_size(QTAILQ_FIRST(&list->head), |
| "kvm_shadow_mem", -1); |
| if (shadow_mem != -1) { |
| shadow_mem /= 4096; |
| ret = kvm_vm_ioctl(s, KVM_SET_NR_MMU_PAGES, shadow_mem); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs) |
| { |
| lhs->selector = rhs->selector; |
| lhs->base = rhs->base; |
| lhs->limit = rhs->limit; |
| lhs->type = 3; |
| lhs->present = 1; |
| lhs->dpl = 3; |
| lhs->db = 0; |
| lhs->s = 1; |
| lhs->l = 0; |
| lhs->g = 0; |
| lhs->avl = 0; |
| lhs->unusable = 0; |
| } |
| |
| static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs) |
| { |
| unsigned flags = rhs->flags; |
| lhs->selector = rhs->selector; |
| lhs->base = rhs->base; |
| lhs->limit = rhs->limit; |
| lhs->type = (flags >> DESC_TYPE_SHIFT) & 15; |
| lhs->present = (flags & DESC_P_MASK) != 0; |
| lhs->dpl = (flags >> DESC_DPL_SHIFT) & 3; |
| lhs->db = (flags >> DESC_B_SHIFT) & 1; |
| lhs->s = (flags & DESC_S_MASK) != 0; |
| lhs->l = (flags >> DESC_L_SHIFT) & 1; |
| lhs->g = (flags & DESC_G_MASK) != 0; |
| lhs->avl = (flags & DESC_AVL_MASK) != 0; |
| lhs->unusable = 0; |
| lhs->padding = 0; |
| } |
| |
| static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs) |
| { |
| lhs->selector = rhs->selector; |
| lhs->base = rhs->base; |
| lhs->limit = rhs->limit; |
| lhs->flags = (rhs->type << DESC_TYPE_SHIFT) | |
| (rhs->present * DESC_P_MASK) | |
| (rhs->dpl << DESC_DPL_SHIFT) | |
| (rhs->db << DESC_B_SHIFT) | |
| (rhs->s * DESC_S_MASK) | |
| (rhs->l << DESC_L_SHIFT) | |
| (rhs->g * DESC_G_MASK) | |
| (rhs->avl * DESC_AVL_MASK); |
| } |
| |
| static void kvm_getput_reg(__u64 *kvm_reg, target_ulong *qemu_reg, int set) |
| { |
| if (set) { |
| *kvm_reg = *qemu_reg; |
| } else { |
| *qemu_reg = *kvm_reg; |
| } |
| } |
| |
| static int kvm_getput_regs(CPUX86State *env, int set) |
| { |
| struct kvm_regs regs; |
| int ret = 0; |
| |
| if (!set) { |
| ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| kvm_getput_reg(®s.rax, &env->regs[R_EAX], set); |
| kvm_getput_reg(®s.rbx, &env->regs[R_EBX], set); |
| kvm_getput_reg(®s.rcx, &env->regs[R_ECX], set); |
| kvm_getput_reg(®s.rdx, &env->regs[R_EDX], set); |
| kvm_getput_reg(®s.rsi, &env->regs[R_ESI], set); |
| kvm_getput_reg(®s.rdi, &env->regs[R_EDI], set); |
| kvm_getput_reg(®s.rsp, &env->regs[R_ESP], set); |
| kvm_getput_reg(®s.rbp, &env->regs[R_EBP], set); |
| #ifdef TARGET_X86_64 |
| kvm_getput_reg(®s.r8, &env->regs[8], set); |
| kvm_getput_reg(®s.r9, &env->regs[9], set); |
| kvm_getput_reg(®s.r10, &env->regs[10], set); |
| kvm_getput_reg(®s.r11, &env->regs[11], set); |
| kvm_getput_reg(®s.r12, &env->regs[12], set); |
| kvm_getput_reg(®s.r13, &env->regs[13], set); |
| kvm_getput_reg(®s.r14, &env->regs[14], set); |
| kvm_getput_reg(®s.r15, &env->regs[15], set); |
| #endif |
| |
| kvm_getput_reg(®s.rflags, &env->eflags, set); |
| kvm_getput_reg(®s.rip, &env->eip, set); |
| |
| if (set) { |
| ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); |
| } |
| |
| return ret; |
| } |
| |
| static int kvm_put_fpu(CPUX86State *env) |
| { |
| struct kvm_fpu fpu; |
| int i; |
| |
| memset(&fpu, 0, sizeof fpu); |
| fpu.fsw = env->fpus & ~(7 << 11); |
| fpu.fsw |= (env->fpstt & 7) << 11; |
| fpu.fcw = env->fpuc; |
| fpu.last_opcode = env->fpop; |
| fpu.last_ip = env->fpip; |
| fpu.last_dp = env->fpdp; |
| for (i = 0; i < 8; ++i) { |
| fpu.ftwx |= (!env->fptags[i]) << i; |
| } |
| memcpy(fpu.fpr, env->fpregs, sizeof env->fpregs); |
| memcpy(fpu.xmm, env->xmm_regs, sizeof env->xmm_regs); |
| fpu.mxcsr = env->mxcsr; |
| |
| return kvm_vcpu_ioctl(env, KVM_SET_FPU, &fpu); |
| } |
| |
| #define XSAVE_FCW_FSW 0 |
| #define XSAVE_FTW_FOP 1 |
| #define XSAVE_CWD_RIP 2 |
| #define XSAVE_CWD_RDP 4 |
| #define XSAVE_MXCSR 6 |
| #define XSAVE_ST_SPACE 8 |
| #define XSAVE_XMM_SPACE 40 |
| #define XSAVE_XSTATE_BV 128 |
| #define XSAVE_YMMH_SPACE 144 |
| |
| static int kvm_put_xsave(CPUX86State *env) |
| { |
| struct kvm_xsave* xsave = env->kvm_xsave_buf; |
| uint16_t cwd, swd, twd; |
| int i, r; |
| |
| if (!kvm_has_xsave()) { |
| return kvm_put_fpu(env); |
| } |
| |
| memset(xsave, 0, sizeof(struct kvm_xsave)); |
| twd = 0; |
| swd = env->fpus & ~(7 << 11); |
| swd |= (env->fpstt & 7) << 11; |
| cwd = env->fpuc; |
| for (i = 0; i < 8; ++i) { |
| twd |= (!env->fptags[i]) << i; |
| } |
| xsave->region[XSAVE_FCW_FSW] = (uint32_t)(swd << 16) + cwd; |
| xsave->region[XSAVE_FTW_FOP] = (uint32_t)(env->fpop << 16) + twd; |
| memcpy(&xsave->region[XSAVE_CWD_RIP], &env->fpip, sizeof(env->fpip)); |
| memcpy(&xsave->region[XSAVE_CWD_RDP], &env->fpdp, sizeof(env->fpdp)); |
| memcpy(&xsave->region[XSAVE_ST_SPACE], env->fpregs, |
| sizeof env->fpregs); |
| memcpy(&xsave->region[XSAVE_XMM_SPACE], env->xmm_regs, |
| sizeof env->xmm_regs); |
| xsave->region[XSAVE_MXCSR] = env->mxcsr; |
| *(uint64_t *)&xsave->region[XSAVE_XSTATE_BV] = env->xstate_bv; |
| memcpy(&xsave->region[XSAVE_YMMH_SPACE], env->ymmh_regs, |
| sizeof env->ymmh_regs); |
| r = kvm_vcpu_ioctl(env, KVM_SET_XSAVE, xsave); |
| return r; |
| } |
| |
| static int kvm_put_xcrs(CPUX86State *env) |
| { |
| struct kvm_xcrs xcrs; |
| |
| if (!kvm_has_xcrs()) { |
| return 0; |
| } |
| |
| xcrs.nr_xcrs = 1; |
| xcrs.flags = 0; |
| xcrs.xcrs[0].xcr = 0; |
| xcrs.xcrs[0].value = env->xcr0; |
| return kvm_vcpu_ioctl(env, KVM_SET_XCRS, &xcrs); |
| } |
| |
| static int kvm_put_sregs(CPUX86State *env) |
| { |
| struct kvm_sregs sregs; |
| |
| memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap)); |
| if (env->interrupt_injected >= 0) { |
| sregs.interrupt_bitmap[env->interrupt_injected / 64] |= |
| (uint64_t)1 << (env->interrupt_injected % 64); |
| } |
| |
| if ((env->eflags & VM_MASK)) { |
| set_v8086_seg(&sregs.cs, &env->segs[R_CS]); |
| set_v8086_seg(&sregs.ds, &env->segs[R_DS]); |
| set_v8086_seg(&sregs.es, &env->segs[R_ES]); |
| set_v8086_seg(&sregs.fs, &env->segs[R_FS]); |
| set_v8086_seg(&sregs.gs, &env->segs[R_GS]); |
| set_v8086_seg(&sregs.ss, &env->segs[R_SS]); |
| } else { |
| set_seg(&sregs.cs, &env->segs[R_CS]); |
| set_seg(&sregs.ds, &env->segs[R_DS]); |
| set_seg(&sregs.es, &env->segs[R_ES]); |
| set_seg(&sregs.fs, &env->segs[R_FS]); |
| set_seg(&sregs.gs, &env->segs[R_GS]); |
| set_seg(&sregs.ss, &env->segs[R_SS]); |
| } |
| |
| set_seg(&sregs.tr, &env->tr); |
| set_seg(&sregs.ldt, &env->ldt); |
| |
| sregs.idt.limit = env->idt.limit; |
| sregs.idt.base = env->idt.base; |
| memset(sregs.idt.padding, 0, sizeof sregs.idt.padding); |
| sregs.gdt.limit = env->gdt.limit; |
| sregs.gdt.base = env->gdt.base; |
| memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding); |
| |
| sregs.cr0 = env->cr[0]; |
| sregs.cr2 = env->cr[2]; |
| sregs.cr3 = env->cr[3]; |
| sregs.cr4 = env->cr[4]; |
| |
| sregs.cr8 = cpu_get_apic_tpr(env->apic_state); |
| sregs.apic_base = cpu_get_apic_base(env->apic_state); |
| |
| sregs.efer = env->efer; |
| |
| return kvm_vcpu_ioctl(env, KVM_SET_SREGS, &sregs); |
| } |
| |
| static void kvm_msr_entry_set(struct kvm_msr_entry *entry, |
| uint32_t index, uint64_t value) |
| { |
| entry->index = index; |
| entry->data = value; |
| } |
| |
| static int kvm_put_msrs(CPUX86State *env, int level) |
| { |
| struct { |
| struct kvm_msrs info; |
| struct kvm_msr_entry entries[100]; |
| } msr_data; |
| struct kvm_msr_entry *msrs = msr_data.entries; |
| int n = 0; |
| |
| kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs); |
| kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp); |
| kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip); |
| kvm_msr_entry_set(&msrs[n++], MSR_PAT, env->pat); |
| if (has_msr_star) { |
| kvm_msr_entry_set(&msrs[n++], MSR_STAR, env->star); |
| } |
| if (has_msr_hsave_pa) { |
| kvm_msr_entry_set(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave); |
| } |
| if (has_msr_tsc_deadline) { |
| kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSCDEADLINE, env->tsc_deadline); |
| } |
| if (has_msr_misc_enable) { |
| kvm_msr_entry_set(&msrs[n++], MSR_IA32_MISC_ENABLE, |
| env->msr_ia32_misc_enable); |
| } |
| #ifdef TARGET_X86_64 |
| if (lm_capable_kernel) { |
| kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar); |
| kvm_msr_entry_set(&msrs[n++], MSR_KERNELGSBASE, env->kernelgsbase); |
| kvm_msr_entry_set(&msrs[n++], MSR_FMASK, env->fmask); |
| kvm_msr_entry_set(&msrs[n++], MSR_LSTAR, env->lstar); |
| } |
| #endif |
| if (level == KVM_PUT_FULL_STATE) { |
| /* |
| * KVM is yet unable to synchronize TSC values of multiple VCPUs on |
| * writeback. Until this is fixed, we only write the offset to SMP |
| * guests after migration, desynchronizing the VCPUs, but avoiding |
| * huge jump-backs that would occur without any writeback at all. |
| */ |
| if (smp_cpus == 1 || env->tsc != 0) { |
| kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc); |
| } |
| } |
| /* |
| * The following paravirtual MSRs have side effects on the guest or are |
| * too heavy for normal writeback. Limit them to reset or full state |
| * updates. |
| */ |
| if (level >= KVM_PUT_RESET_STATE) { |
| kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME, |
| env->system_time_msr); |
| kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK, env->wall_clock_msr); |
| if (has_msr_async_pf_en) { |
| kvm_msr_entry_set(&msrs[n++], MSR_KVM_ASYNC_PF_EN, |
| env->async_pf_en_msr); |
| } |
| if (has_msr_pv_eoi_en) { |
| kvm_msr_entry_set(&msrs[n++], MSR_KVM_PV_EOI_EN, |
| env->pv_eoi_en_msr); |
| } |
| if (hyperv_hypercall_available()) { |
| kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_GUEST_OS_ID, 0); |
| kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_HYPERCALL, 0); |
| } |
| if (hyperv_vapic_recommended()) { |
| kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_APIC_ASSIST_PAGE, 0); |
| } |
| } |
| if (env->mcg_cap) { |
| int i; |
| |
| kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status); |
| kvm_msr_entry_set(&msrs[n++], MSR_MCG_CTL, env->mcg_ctl); |
| for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { |
| kvm_msr_entry_set(&msrs[n++], MSR_MC0_CTL + i, env->mce_banks[i]); |
| } |
| } |
| |
| msr_data.info.nmsrs = n; |
| |
| return kvm_vcpu_ioctl(env, KVM_SET_MSRS, &msr_data); |
| |
| } |
| |
| |
| static int kvm_get_fpu(CPUX86State *env) |
| { |
| struct kvm_fpu fpu; |
| int i, ret; |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_FPU, &fpu); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| env->fpstt = (fpu.fsw >> 11) & 7; |
| env->fpus = fpu.fsw; |
| env->fpuc = fpu.fcw; |
| env->fpop = fpu.last_opcode; |
| env->fpip = fpu.last_ip; |
| env->fpdp = fpu.last_dp; |
| for (i = 0; i < 8; ++i) { |
| env->fptags[i] = !((fpu.ftwx >> i) & 1); |
| } |
| memcpy(env->fpregs, fpu.fpr, sizeof env->fpregs); |
| memcpy(env->xmm_regs, fpu.xmm, sizeof env->xmm_regs); |
| env->mxcsr = fpu.mxcsr; |
| |
| return 0; |
| } |
| |
| static int kvm_get_xsave(CPUX86State *env) |
| { |
| struct kvm_xsave* xsave = env->kvm_xsave_buf; |
| int ret, i; |
| uint16_t cwd, swd, twd; |
| |
| if (!kvm_has_xsave()) { |
| return kvm_get_fpu(env); |
| } |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_XSAVE, xsave); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| cwd = (uint16_t)xsave->region[XSAVE_FCW_FSW]; |
| swd = (uint16_t)(xsave->region[XSAVE_FCW_FSW] >> 16); |
| twd = (uint16_t)xsave->region[XSAVE_FTW_FOP]; |
| env->fpop = (uint16_t)(xsave->region[XSAVE_FTW_FOP] >> 16); |
| env->fpstt = (swd >> 11) & 7; |
| env->fpus = swd; |
| env->fpuc = cwd; |
| for (i = 0; i < 8; ++i) { |
| env->fptags[i] = !((twd >> i) & 1); |
| } |
| memcpy(&env->fpip, &xsave->region[XSAVE_CWD_RIP], sizeof(env->fpip)); |
| memcpy(&env->fpdp, &xsave->region[XSAVE_CWD_RDP], sizeof(env->fpdp)); |
| env->mxcsr = xsave->region[XSAVE_MXCSR]; |
| memcpy(env->fpregs, &xsave->region[XSAVE_ST_SPACE], |
| sizeof env->fpregs); |
| memcpy(env->xmm_regs, &xsave->region[XSAVE_XMM_SPACE], |
| sizeof env->xmm_regs); |
| env->xstate_bv = *(uint64_t *)&xsave->region[XSAVE_XSTATE_BV]; |
| memcpy(env->ymmh_regs, &xsave->region[XSAVE_YMMH_SPACE], |
| sizeof env->ymmh_regs); |
| return 0; |
| } |
| |
| static int kvm_get_xcrs(CPUX86State *env) |
| { |
| int i, ret; |
| struct kvm_xcrs xcrs; |
| |
| if (!kvm_has_xcrs()) { |
| return 0; |
| } |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_XCRS, &xcrs); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| for (i = 0; i < xcrs.nr_xcrs; i++) { |
| /* Only support xcr0 now */ |
| if (xcrs.xcrs[0].xcr == 0) { |
| env->xcr0 = xcrs.xcrs[0].value; |
| break; |
| } |
| } |
| return 0; |
| } |
| |
| static int kvm_get_sregs(CPUX86State *env) |
| { |
| struct kvm_sregs sregs; |
| uint32_t hflags; |
| int bit, i, ret; |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| /* There can only be one pending IRQ set in the bitmap at a time, so try |
| to find it and save its number instead (-1 for none). */ |
| env->interrupt_injected = -1; |
| for (i = 0; i < ARRAY_SIZE(sregs.interrupt_bitmap); i++) { |
| if (sregs.interrupt_bitmap[i]) { |
| bit = ctz64(sregs.interrupt_bitmap[i]); |
| env->interrupt_injected = i * 64 + bit; |
| break; |
| } |
| } |
| |
| get_seg(&env->segs[R_CS], &sregs.cs); |
| get_seg(&env->segs[R_DS], &sregs.ds); |
| get_seg(&env->segs[R_ES], &sregs.es); |
| get_seg(&env->segs[R_FS], &sregs.fs); |
| get_seg(&env->segs[R_GS], &sregs.gs); |
| get_seg(&env->segs[R_SS], &sregs.ss); |
| |
| get_seg(&env->tr, &sregs.tr); |
| get_seg(&env->ldt, &sregs.ldt); |
| |
| env->idt.limit = sregs.idt.limit; |
| env->idt.base = sregs.idt.base; |
| env->gdt.limit = sregs.gdt.limit; |
| env->gdt.base = sregs.gdt.base; |
| |
| env->cr[0] = sregs.cr0; |
| env->cr[2] = sregs.cr2; |
| env->cr[3] = sregs.cr3; |
| env->cr[4] = sregs.cr4; |
| |
| env->efer = sregs.efer; |
| |
| /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */ |
| |
| #define HFLAG_COPY_MASK \ |
| ~( HF_CPL_MASK | HF_PE_MASK | HF_MP_MASK | HF_EM_MASK | \ |
| HF_TS_MASK | HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK | \ |
| HF_OSFXSR_MASK | HF_LMA_MASK | HF_CS32_MASK | \ |
| HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK) |
| |
| hflags = (env->segs[R_CS].flags >> DESC_DPL_SHIFT) & HF_CPL_MASK; |
| hflags |= (env->cr[0] & CR0_PE_MASK) << (HF_PE_SHIFT - CR0_PE_SHIFT); |
| hflags |= (env->cr[0] << (HF_MP_SHIFT - CR0_MP_SHIFT)) & |
| (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK); |
| hflags |= (env->eflags & (HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK)); |
| hflags |= (env->cr[4] & CR4_OSFXSR_MASK) << |
| (HF_OSFXSR_SHIFT - CR4_OSFXSR_SHIFT); |
| |
| if (env->efer & MSR_EFER_LMA) { |
| hflags |= HF_LMA_MASK; |
| } |
| |
| if ((hflags & HF_LMA_MASK) && (env->segs[R_CS].flags & DESC_L_MASK)) { |
| hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK; |
| } else { |
| hflags |= (env->segs[R_CS].flags & DESC_B_MASK) >> |
| (DESC_B_SHIFT - HF_CS32_SHIFT); |
| hflags |= (env->segs[R_SS].flags & DESC_B_MASK) >> |
| (DESC_B_SHIFT - HF_SS32_SHIFT); |
| if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK) || |
| !(hflags & HF_CS32_MASK)) { |
| hflags |= HF_ADDSEG_MASK; |
| } else { |
| hflags |= ((env->segs[R_DS].base | env->segs[R_ES].base | |
| env->segs[R_SS].base) != 0) << HF_ADDSEG_SHIFT; |
| } |
| } |
| env->hflags = (env->hflags & HFLAG_COPY_MASK) | hflags; |
| |
| return 0; |
| } |
| |
| static int kvm_get_msrs(CPUX86State *env) |
| { |
| struct { |
| struct kvm_msrs info; |
| struct kvm_msr_entry entries[100]; |
| } msr_data; |
| struct kvm_msr_entry *msrs = msr_data.entries; |
| int ret, i, n; |
| |
| n = 0; |
| msrs[n++].index = MSR_IA32_SYSENTER_CS; |
| msrs[n++].index = MSR_IA32_SYSENTER_ESP; |
| msrs[n++].index = MSR_IA32_SYSENTER_EIP; |
| msrs[n++].index = MSR_PAT; |
| if (has_msr_star) { |
| msrs[n++].index = MSR_STAR; |
| } |
| if (has_msr_hsave_pa) { |
| msrs[n++].index = MSR_VM_HSAVE_PA; |
| } |
| if (has_msr_tsc_deadline) { |
| msrs[n++].index = MSR_IA32_TSCDEADLINE; |
| } |
| if (has_msr_misc_enable) { |
| msrs[n++].index = MSR_IA32_MISC_ENABLE; |
| } |
| |
| if (!env->tsc_valid) { |
| msrs[n++].index = MSR_IA32_TSC; |
| env->tsc_valid = !runstate_is_running(); |
| } |
| |
| #ifdef TARGET_X86_64 |
| if (lm_capable_kernel) { |
| msrs[n++].index = MSR_CSTAR; |
| msrs[n++].index = MSR_KERNELGSBASE; |
| msrs[n++].index = MSR_FMASK; |
| msrs[n++].index = MSR_LSTAR; |
| } |
| #endif |
| msrs[n++].index = MSR_KVM_SYSTEM_TIME; |
| msrs[n++].index = MSR_KVM_WALL_CLOCK; |
| if (has_msr_async_pf_en) { |
| msrs[n++].index = MSR_KVM_ASYNC_PF_EN; |
| } |
| if (has_msr_pv_eoi_en) { |
| msrs[n++].index = MSR_KVM_PV_EOI_EN; |
| } |
| |
| if (env->mcg_cap) { |
| msrs[n++].index = MSR_MCG_STATUS; |
| msrs[n++].index = MSR_MCG_CTL; |
| for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { |
| msrs[n++].index = MSR_MC0_CTL + i; |
| } |
| } |
| |
| msr_data.info.nmsrs = n; |
| ret = kvm_vcpu_ioctl(env, KVM_GET_MSRS, &msr_data); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| for (i = 0; i < ret; i++) { |
| switch (msrs[i].index) { |
| case MSR_IA32_SYSENTER_CS: |
| env->sysenter_cs = msrs[i].data; |
| break; |
| case MSR_IA32_SYSENTER_ESP: |
| env->sysenter_esp = msrs[i].data; |
| break; |
| case MSR_IA32_SYSENTER_EIP: |
| env->sysenter_eip = msrs[i].data; |
| break; |
| case MSR_PAT: |
| env->pat = msrs[i].data; |
| break; |
| case MSR_STAR: |
| env->star = msrs[i].data; |
| break; |
| #ifdef TARGET_X86_64 |
| case MSR_CSTAR: |
| env->cstar = msrs[i].data; |
| break; |
| case MSR_KERNELGSBASE: |
| env->kernelgsbase = msrs[i].data; |
| break; |
| case MSR_FMASK: |
| env->fmask = msrs[i].data; |
| break; |
| case MSR_LSTAR: |
| env->lstar = msrs[i].data; |
| break; |
| #endif |
| case MSR_IA32_TSC: |
| env->tsc = msrs[i].data; |
| break; |
| case MSR_IA32_TSCDEADLINE: |
| env->tsc_deadline = msrs[i].data; |
| break; |
| case MSR_VM_HSAVE_PA: |
| env->vm_hsave = msrs[i].data; |
| break; |
| case MSR_KVM_SYSTEM_TIME: |
| env->system_time_msr = msrs[i].data; |
| break; |
| case MSR_KVM_WALL_CLOCK: |
| env->wall_clock_msr = msrs[i].data; |
| break; |
| case MSR_MCG_STATUS: |
| env->mcg_status = msrs[i].data; |
| break; |
| case MSR_MCG_CTL: |
| env->mcg_ctl = msrs[i].data; |
| break; |
| case MSR_IA32_MISC_ENABLE: |
| env->msr_ia32_misc_enable = msrs[i].data; |
| break; |
| default: |
| if (msrs[i].index >= MSR_MC0_CTL && |
| msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { |
| env->mce_banks[msrs[i].index - MSR_MC0_CTL] = msrs[i].data; |
| } |
| break; |
| case MSR_KVM_ASYNC_PF_EN: |
| env->async_pf_en_msr = msrs[i].data; |
| break; |
| case MSR_KVM_PV_EOI_EN: |
| env->pv_eoi_en_msr = msrs[i].data; |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int kvm_put_mp_state(CPUX86State *env) |
| { |
| struct kvm_mp_state mp_state = { .mp_state = env->mp_state }; |
| |
| return kvm_vcpu_ioctl(env, KVM_SET_MP_STATE, &mp_state); |
| } |
| |
| static int kvm_get_mp_state(CPUX86State *env) |
| { |
| struct kvm_mp_state mp_state; |
| int ret; |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_MP_STATE, &mp_state); |
| if (ret < 0) { |
| return ret; |
| } |
| env->mp_state = mp_state.mp_state; |
| if (kvm_irqchip_in_kernel()) { |
| env->halted = (mp_state.mp_state == KVM_MP_STATE_HALTED); |
| } |
| return 0; |
| } |
| |
| static int kvm_get_apic(CPUX86State *env) |
| { |
| DeviceState *apic = env->apic_state; |
| struct kvm_lapic_state kapic; |
| int ret; |
| |
| if (apic && kvm_irqchip_in_kernel()) { |
| ret = kvm_vcpu_ioctl(env, KVM_GET_LAPIC, &kapic); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| kvm_get_apic_state(apic, &kapic); |
| } |
| return 0; |
| } |
| |
| static int kvm_put_apic(CPUX86State *env) |
| { |
| DeviceState *apic = env->apic_state; |
| struct kvm_lapic_state kapic; |
| |
| if (apic && kvm_irqchip_in_kernel()) { |
| kvm_put_apic_state(apic, &kapic); |
| |
| return kvm_vcpu_ioctl(env, KVM_SET_LAPIC, &kapic); |
| } |
| return 0; |
| } |
| |
| static int kvm_put_vcpu_events(CPUX86State *env, int level) |
| { |
| struct kvm_vcpu_events events; |
| |
| if (!kvm_has_vcpu_events()) { |
| return 0; |
| } |
| |
| events.exception.injected = (env->exception_injected >= 0); |
| events.exception.nr = env->exception_injected; |
| events.exception.has_error_code = env->has_error_code; |
| events.exception.error_code = env->error_code; |
| events.exception.pad = 0; |
| |
| events.interrupt.injected = (env->interrupt_injected >= 0); |
| events.interrupt.nr = env->interrupt_injected; |
| events.interrupt.soft = env->soft_interrupt; |
| |
| events.nmi.injected = env->nmi_injected; |
| events.nmi.pending = env->nmi_pending; |
| events.nmi.masked = !!(env->hflags2 & HF2_NMI_MASK); |
| events.nmi.pad = 0; |
| |
| events.sipi_vector = env->sipi_vector; |
| |
| events.flags = 0; |
| if (level >= KVM_PUT_RESET_STATE) { |
| events.flags |= |
| KVM_VCPUEVENT_VALID_NMI_PENDING | KVM_VCPUEVENT_VALID_SIPI_VECTOR; |
| } |
| |
| return kvm_vcpu_ioctl(env, KVM_SET_VCPU_EVENTS, &events); |
| } |
| |
| static int kvm_get_vcpu_events(CPUX86State *env) |
| { |
| struct kvm_vcpu_events events; |
| int ret; |
| |
| if (!kvm_has_vcpu_events()) { |
| return 0; |
| } |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_VCPU_EVENTS, &events); |
| if (ret < 0) { |
| return ret; |
| } |
| env->exception_injected = |
| events.exception.injected ? events.exception.nr : -1; |
| env->has_error_code = events.exception.has_error_code; |
| env->error_code = events.exception.error_code; |
| |
| env->interrupt_injected = |
| events.interrupt.injected ? events.interrupt.nr : -1; |
| env->soft_interrupt = events.interrupt.soft; |
| |
| env->nmi_injected = events.nmi.injected; |
| env->nmi_pending = events.nmi.pending; |
| if (events.nmi.masked) { |
| env->hflags2 |= HF2_NMI_MASK; |
| } else { |
| env->hflags2 &= ~HF2_NMI_MASK; |
| } |
| |
| env->sipi_vector = events.sipi_vector; |
| |
| return 0; |
| } |
| |
| static int kvm_guest_debug_workarounds(CPUX86State *env) |
| { |
| int ret = 0; |
| unsigned long reinject_trap = 0; |
| |
| if (!kvm_has_vcpu_events()) { |
| if (env->exception_injected == 1) { |
| reinject_trap = KVM_GUESTDBG_INJECT_DB; |
| } else if (env->exception_injected == 3) { |
| reinject_trap = KVM_GUESTDBG_INJECT_BP; |
| } |
| env->exception_injected = -1; |
| } |
| |
| /* |
| * Kernels before KVM_CAP_X86_ROBUST_SINGLESTEP overwrote flags.TF |
| * injected via SET_GUEST_DEBUG while updating GP regs. Work around this |
| * by updating the debug state once again if single-stepping is on. |
| * Another reason to call kvm_update_guest_debug here is a pending debug |
| * trap raise by the guest. On kernels without SET_VCPU_EVENTS we have to |
| * reinject them via SET_GUEST_DEBUG. |
| */ |
| if (reinject_trap || |
| (!kvm_has_robust_singlestep() && env->singlestep_enabled)) { |
| ret = kvm_update_guest_debug(env, reinject_trap); |
| } |
| return ret; |
| } |
| |
| static int kvm_put_debugregs(CPUX86State *env) |
| { |
| struct kvm_debugregs dbgregs; |
| int i; |
| |
| if (!kvm_has_debugregs()) { |
| return 0; |
| } |
| |
| for (i = 0; i < 4; i++) { |
| dbgregs.db[i] = env->dr[i]; |
| } |
| dbgregs.dr6 = env->dr[6]; |
| dbgregs.dr7 = env->dr[7]; |
| dbgregs.flags = 0; |
| |
| return kvm_vcpu_ioctl(env, KVM_SET_DEBUGREGS, &dbgregs); |
| } |
| |
| static int kvm_get_debugregs(CPUX86State *env) |
| { |
| struct kvm_debugregs dbgregs; |
| int i, ret; |
| |
| if (!kvm_has_debugregs()) { |
| return 0; |
| } |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_DEBUGREGS, &dbgregs); |
| if (ret < 0) { |
| return ret; |
| } |
| for (i = 0; i < 4; i++) { |
| env->dr[i] = dbgregs.db[i]; |
| } |
| env->dr[4] = env->dr[6] = dbgregs.dr6; |
| env->dr[5] = env->dr[7] = dbgregs.dr7; |
| |
| return 0; |
| } |
| |
| int kvm_arch_put_registers(CPUX86State *env, int level) |
| { |
| CPUState *cpu = ENV_GET_CPU(env); |
| int ret; |
| |
| assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); |
| |
| ret = kvm_getput_regs(env, 1); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_put_xsave(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_put_xcrs(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_put_sregs(env); |
| if (ret < 0) { |
| return ret; |
| } |
| /* must be before kvm_put_msrs */ |
| ret = kvm_inject_mce_oldstyle(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_put_msrs(env, level); |
| if (ret < 0) { |
| return ret; |
| } |
| if (level >= KVM_PUT_RESET_STATE) { |
| ret = kvm_put_mp_state(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_put_apic(env); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| ret = kvm_put_vcpu_events(env, level); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_put_debugregs(env); |
| if (ret < 0) { |
| return ret; |
| } |
| /* must be last */ |
| ret = kvm_guest_debug_workarounds(env); |
| if (ret < 0) { |
| return ret; |
| } |
| return 0; |
| } |
| |
| int kvm_arch_get_registers(CPUX86State *env) |
| { |
| CPUState *cpu = ENV_GET_CPU(env); |
| int ret; |
| |
| assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); |
| |
| ret = kvm_getput_regs(env, 0); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_xsave(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_xcrs(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_sregs(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_msrs(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_mp_state(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_apic(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_vcpu_events(env); |
| if (ret < 0) { |
| return ret; |
| } |
| ret = kvm_get_debugregs(env); |
| if (ret < 0) { |
| return ret; |
| } |
| return 0; |
| } |
| |
| void kvm_arch_pre_run(CPUX86State *env, struct kvm_run *run) |
| { |
| int ret; |
| |
| /* Inject NMI */ |
| if (env->interrupt_request & CPU_INTERRUPT_NMI) { |
| env->interrupt_request &= ~CPU_INTERRUPT_NMI; |
| DPRINTF("injected NMI\n"); |
| ret = kvm_vcpu_ioctl(env, KVM_NMI); |
| if (ret < 0) { |
| fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n", |
| strerror(-ret)); |
| } |
| } |
| |
| if (!kvm_irqchip_in_kernel()) { |
| /* Force the VCPU out of its inner loop to process any INIT requests |
| * or pending TPR access reports. */ |
| if (env->interrupt_request & |
| (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) { |
| env->exit_request = 1; |
| } |
| |
| /* Try to inject an interrupt if the guest can accept it */ |
| if (run->ready_for_interrupt_injection && |
| (env->interrupt_request & CPU_INTERRUPT_HARD) && |
| (env->eflags & IF_MASK)) { |
| int irq; |
| |
| env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
| irq = cpu_get_pic_interrupt(env); |
| if (irq >= 0) { |
| struct kvm_interrupt intr; |
| |
| intr.irq = irq; |
| DPRINTF("injected interrupt %d\n", irq); |
| ret = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr); |
| if (ret < 0) { |
| fprintf(stderr, |
| "KVM: injection failed, interrupt lost (%s)\n", |
| strerror(-ret)); |
| } |
| } |
| } |
| |
| /* If we have an interrupt but the guest is not ready to receive an |
| * interrupt, request an interrupt window exit. This will |
| * cause a return to userspace as soon as the guest is ready to |
| * receive interrupts. */ |
| if ((env->interrupt_request & CPU_INTERRUPT_HARD)) { |
| run->request_interrupt_window = 1; |
| } else { |
| run->request_interrupt_window = 0; |
| } |
| |
| DPRINTF("setting tpr\n"); |
| run->cr8 = cpu_get_apic_tpr(env->apic_state); |
| } |
| } |
| |
| void kvm_arch_post_run(CPUX86State *env, struct kvm_run *run) |
| { |
| if (run->if_flag) { |
| env->eflags |= IF_MASK; |
| } else { |
| env->eflags &= ~IF_MASK; |
| } |
| cpu_set_apic_tpr(env->apic_state, run->cr8); |
| cpu_set_apic_base(env->apic_state, run->apic_base); |
| } |
| |
| int kvm_arch_process_async_events(CPUX86State *env) |
| { |
| X86CPU *cpu = x86_env_get_cpu(env); |
| |
| if (env->interrupt_request & CPU_INTERRUPT_MCE) { |
| /* We must not raise CPU_INTERRUPT_MCE if it's not supported. */ |
| assert(env->mcg_cap); |
| |
| env->interrupt_request &= ~CPU_INTERRUPT_MCE; |
| |
| kvm_cpu_synchronize_state(env); |
| |
| if (env->exception_injected == EXCP08_DBLE) { |
| /* this means triple fault */ |
| qemu_system_reset_request(); |
| env->exit_request = 1; |
| return 0; |
| } |
| env->exception_injected = EXCP12_MCHK; |
| env->has_error_code = 0; |
| |
| env->halted = 0; |
| if (kvm_irqchip_in_kernel() && env->mp_state == KVM_MP_STATE_HALTED) { |
| env->mp_state = KVM_MP_STATE_RUNNABLE; |
| } |
| } |
| |
| if (kvm_irqchip_in_kernel()) { |
| return 0; |
| } |
| |
| if (env->interrupt_request & CPU_INTERRUPT_POLL) { |
| env->interrupt_request &= ~CPU_INTERRUPT_POLL; |
| apic_poll_irq(env->apic_state); |
| } |
| if (((env->interrupt_request & CPU_INTERRUPT_HARD) && |
| (env->eflags & IF_MASK)) || |
| (env->interrupt_request & CPU_INTERRUPT_NMI)) { |
| env->halted = 0; |
| } |
| if (env->interrupt_request & CPU_INTERRUPT_INIT) { |
| kvm_cpu_synchronize_state(env); |
| do_cpu_init(cpu); |
| } |
| if (env->interrupt_request & CPU_INTERRUPT_SIPI) { |
| kvm_cpu_synchronize_state(env); |
| do_cpu_sipi(cpu); |
| } |
| if (env->interrupt_request & CPU_INTERRUPT_TPR) { |
| env->interrupt_request &= ~CPU_INTERRUPT_TPR; |
| kvm_cpu_synchronize_state(env); |
| apic_handle_tpr_access_report(env->apic_state, env->eip, |
| env->tpr_access_type); |
| } |
| |
| return env->halted; |
| } |
| |
| static int kvm_handle_halt(CPUX86State *env) |
| { |
| if (!((env->interrupt_request & CPU_INTERRUPT_HARD) && |
| (env->eflags & IF_MASK)) && |
| !(env->interrupt_request & CPU_INTERRUPT_NMI)) { |
| env->halted = 1; |
| return EXCP_HLT; |
| } |
| |
| return 0; |
| } |
| |
| static int kvm_handle_tpr_access(CPUX86State *env) |
| { |
| struct kvm_run *run = env->kvm_run; |
| |
| apic_handle_tpr_access_report(env->apic_state, run->tpr_access.rip, |
| run->tpr_access.is_write ? TPR_ACCESS_WRITE |
| : TPR_ACCESS_READ); |
| return 1; |
| } |
| |
| int kvm_arch_insert_sw_breakpoint(CPUX86State *env, struct kvm_sw_breakpoint *bp) |
| { |
| static const uint8_t int3 = 0xcc; |
| |
| if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) || |
| cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&int3, 1, 1)) { |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| int kvm_arch_remove_sw_breakpoint(CPUX86State *env, struct kvm_sw_breakpoint *bp) |
| { |
| uint8_t int3; |
| |
| if (cpu_memory_rw_debug(env, bp->pc, &int3, 1, 0) || int3 != 0xcc || |
| cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static struct { |
| target_ulong addr; |
| int len; |
| int type; |
| } hw_breakpoint[4]; |
| |
| static int nb_hw_breakpoint; |
| |
| static int find_hw_breakpoint(target_ulong addr, int len, int type) |
| { |
| int n; |
| |
| for (n = 0; n < nb_hw_breakpoint; n++) { |
| if (hw_breakpoint[n].addr == addr && hw_breakpoint[n].type == type && |
| (hw_breakpoint[n].len == len || len == -1)) { |
| return n; |
| } |
| } |
| return -1; |
| } |
| |
| int kvm_arch_insert_hw_breakpoint(target_ulong addr, |
| target_ulong len, int type) |
| { |
| switch (type) { |
| case GDB_BREAKPOINT_HW: |
| len = 1; |
| break; |
| case GDB_WATCHPOINT_WRITE: |
| case GDB_WATCHPOINT_ACCESS: |
| switch (len) { |
| case 1: |
| break; |
| case 2: |
| case 4: |
| case 8: |
| if (addr & (len - 1)) { |
| return -EINVAL; |
| } |
| break; |
| default: |
| return -EINVAL; |
| } |
| break; |
| default: |
| return -ENOSYS; |
| } |
| |
| if (nb_hw_breakpoint == 4) { |
| return -ENOBUFS; |
| } |
| if (find_hw_breakpoint(addr, len, type) >= 0) { |
| return -EEXIST; |
| } |
| hw_breakpoint[nb_hw_breakpoint].addr = addr; |
| hw_breakpoint[nb_hw_breakpoint].len = len; |
| hw_breakpoint[nb_hw_breakpoint].type = type; |
| nb_hw_breakpoint++; |
| |
| return 0; |
| } |
| |
| int kvm_arch_remove_hw_breakpoint(target_ulong addr, |
| target_ulong len, int type) |
| { |
| int n; |
| |
| n = find_hw_breakpoint(addr, (type == GDB_BREAKPOINT_HW) ? 1 : len, type); |
| if (n < 0) { |
| return -ENOENT; |
| } |
| nb_hw_breakpoint--; |
| hw_breakpoint[n] = hw_breakpoint[nb_hw_breakpoint]; |
| |
| return 0; |
| } |
| |
| void kvm_arch_remove_all_hw_breakpoints(void) |
| { |
| nb_hw_breakpoint = 0; |
| } |
| |
| static CPUWatchpoint hw_watchpoint; |
| |
| static int kvm_handle_debug(struct kvm_debug_exit_arch *arch_info) |
| { |
| int ret = 0; |
| int n; |
| |
| if (arch_info->exception == 1) { |
| if (arch_info->dr6 & (1 << 14)) { |
| if (cpu_single_env->singlestep_enabled) { |
| ret = EXCP_DEBUG; |
| } |
| } else { |
| for (n = 0; n < 4; n++) { |
| if (arch_info->dr6 & (1 << n)) { |
| switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) { |
| case 0x0: |
| ret = EXCP_DEBUG; |
| break; |
| case 0x1: |
| ret = EXCP_DEBUG; |
| cpu_single_env->watchpoint_hit = &hw_watchpoint; |
| hw_watchpoint.vaddr = hw_breakpoint[n].addr; |
| hw_watchpoint.flags = BP_MEM_WRITE; |
| break; |
| case 0x3: |
| ret = EXCP_DEBUG; |
| cpu_single_env->watchpoint_hit = &hw_watchpoint; |
| hw_watchpoint.vaddr = hw_breakpoint[n].addr; |
| hw_watchpoint.flags = BP_MEM_ACCESS; |
| break; |
| } |
| } |
| } |
| } |
| } else if (kvm_find_sw_breakpoint(cpu_single_env, arch_info->pc)) { |
| ret = EXCP_DEBUG; |
| } |
| if (ret == 0) { |
| cpu_synchronize_state(cpu_single_env); |
| assert(cpu_single_env->exception_injected == -1); |
| |
| /* pass to guest */ |
| cpu_single_env->exception_injected = arch_info->exception; |
| cpu_single_env->has_error_code = 0; |
| } |
| |
| return ret; |
| } |
| |
| void kvm_arch_update_guest_debug(CPUX86State *env, struct kvm_guest_debug *dbg) |
| { |
| const uint8_t type_code[] = { |
| [GDB_BREAKPOINT_HW] = 0x0, |
| [GDB_WATCHPOINT_WRITE] = 0x1, |
| [GDB_WATCHPOINT_ACCESS] = 0x3 |
| }; |
| const uint8_t len_code[] = { |
| [1] = 0x0, [2] = 0x1, [4] = 0x3, [8] = 0x2 |
| }; |
| int n; |
| |
| if (kvm_sw_breakpoints_active(env)) { |
| dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; |
| } |
| if (nb_hw_breakpoint > 0) { |
| dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; |
| dbg->arch.debugreg[7] = 0x0600; |
| for (n = 0; n < nb_hw_breakpoint; n++) { |
| dbg->arch.debugreg[n] = hw_breakpoint[n].addr; |
| dbg->arch.debugreg[7] |= (2 << (n * 2)) | |
| (type_code[hw_breakpoint[n].type] << (16 + n*4)) | |
| ((uint32_t)len_code[hw_breakpoint[n].len] << (18 + n*4)); |
| } |
| } |
| } |
| |
| static bool host_supports_vmx(void) |
| { |
| uint32_t ecx, unused; |
| |
| host_cpuid(1, 0, &unused, &unused, &ecx, &unused); |
| return ecx & CPUID_EXT_VMX; |
| } |
| |
| #define VMX_INVALID_GUEST_STATE 0x80000021 |
| |
| int kvm_arch_handle_exit(CPUX86State *env, struct kvm_run *run) |
| { |
| uint64_t code; |
| int ret; |
| |
| switch (run->exit_reason) { |
| case KVM_EXIT_HLT: |
| DPRINTF("handle_hlt\n"); |
| ret = kvm_handle_halt(env); |
| break; |
| case KVM_EXIT_SET_TPR: |
| ret = 0; |
| break; |
| case KVM_EXIT_TPR_ACCESS: |
| ret = kvm_handle_tpr_access(env); |
| break; |
| case KVM_EXIT_FAIL_ENTRY: |
| code = run->fail_entry.hardware_entry_failure_reason; |
| fprintf(stderr, "KVM: entry failed, hardware error 0x%" PRIx64 "\n", |
| code); |
| if (host_supports_vmx() && code == VMX_INVALID_GUEST_STATE) { |
| fprintf(stderr, |
| "\nIf you're running a guest on an Intel machine without " |
| "unrestricted mode\n" |
| "support, the failure can be most likely due to the guest " |
| "entering an invalid\n" |
| "state for Intel VT. For example, the guest maybe running " |
| "in big real mode\n" |
| "which is not supported on less recent Intel processors." |
| "\n\n"); |
| } |
| ret = -1; |
| break; |
| case KVM_EXIT_EXCEPTION: |
| fprintf(stderr, "KVM: exception %d exit (error code 0x%x)\n", |
| run->ex.exception, run->ex.error_code); |
| ret = -1; |
| break; |
| case KVM_EXIT_DEBUG: |
| DPRINTF("kvm_exit_debug\n"); |
| ret = kvm_handle_debug(&run->debug.arch); |
| break; |
| default: |
| fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); |
| ret = -1; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| bool kvm_arch_stop_on_emulation_error(CPUX86State *env) |
| { |
| kvm_cpu_synchronize_state(env); |
| return !(env->cr[0] & CR0_PE_MASK) || |
| ((env->segs[R_CS].selector & 3) != 3); |
| } |
| |
| void kvm_arch_init_irq_routing(KVMState *s) |
| { |
| if (!kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) { |
| /* If kernel can't do irq routing, interrupt source |
| * override 0->2 cannot be set up as required by HPET. |
| * So we have to disable it. |
| */ |
| no_hpet = 1; |
| } |
| /* We know at this point that we're using the in-kernel |
| * irqchip, so we can use irqfds, and on x86 we know |
| * we can use msi via irqfd and GSI routing. |
| */ |
| kvm_irqfds_allowed = true; |
| kvm_msi_via_irqfd_allowed = true; |
| kvm_gsi_routing_allowed = true; |
| } |
| |
| /* Classic KVM device assignment interface. Will remain x86 only. */ |
| int kvm_device_pci_assign(KVMState *s, PCIHostDeviceAddress *dev_addr, |
| uint32_t flags, uint32_t *dev_id) |
| { |
| struct kvm_assigned_pci_dev dev_data = { |
| .segnr = dev_addr->domain, |
| .busnr = dev_addr->bus, |
| .devfn = PCI_DEVFN(dev_addr->slot, dev_addr->function), |
| .flags = flags, |
| }; |
| int ret; |
| |
| dev_data.assigned_dev_id = |
| (dev_addr->domain << 16) | (dev_addr->bus << 8) | dev_data.devfn; |
| |
| ret = kvm_vm_ioctl(s, KVM_ASSIGN_PCI_DEVICE, &dev_data); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| *dev_id = dev_data.assigned_dev_id; |
| |
| return 0; |
| } |
| |
| int kvm_device_pci_deassign(KVMState *s, uint32_t dev_id) |
| { |
| struct kvm_assigned_pci_dev dev_data = { |
| .assigned_dev_id = dev_id, |
| }; |
| |
| return kvm_vm_ioctl(s, KVM_DEASSIGN_PCI_DEVICE, &dev_data); |
| } |
| |
| static int kvm_assign_irq_internal(KVMState *s, uint32_t dev_id, |
| uint32_t irq_type, uint32_t guest_irq) |
| { |
| struct kvm_assigned_irq assigned_irq = { |
| .assigned_dev_id = dev_id, |
| .guest_irq = guest_irq, |
| .flags = irq_type, |
| }; |
| |
| if (kvm_check_extension(s, KVM_CAP_ASSIGN_DEV_IRQ)) { |
| return kvm_vm_ioctl(s, KVM_ASSIGN_DEV_IRQ, &assigned_irq); |
| } else { |
| return kvm_vm_ioctl(s, KVM_ASSIGN_IRQ, &assigned_irq); |
| } |
| } |
| |
| int kvm_device_intx_assign(KVMState *s, uint32_t dev_id, bool use_host_msi, |
| uint32_t guest_irq) |
| { |
| uint32_t irq_type = KVM_DEV_IRQ_GUEST_INTX | |
| (use_host_msi ? KVM_DEV_IRQ_HOST_MSI : KVM_DEV_IRQ_HOST_INTX); |
| |
| return kvm_assign_irq_internal(s, dev_id, irq_type, guest_irq); |
| } |
| |
| int kvm_device_intx_set_mask(KVMState *s, uint32_t dev_id, bool masked) |
| { |
| struct kvm_assigned_pci_dev dev_data = { |
| .assigned_dev_id = dev_id, |
| .flags = masked ? KVM_DEV_ASSIGN_MASK_INTX : 0, |
| }; |
| |
| return kvm_vm_ioctl(s, KVM_ASSIGN_SET_INTX_MASK, &dev_data); |
| } |
| |
| static int kvm_deassign_irq_internal(KVMState *s, uint32_t dev_id, |
| uint32_t type) |
| { |
| struct kvm_assigned_irq assigned_irq = { |
| .assigned_dev_id = dev_id, |
| .flags = type, |
| }; |
| |
| return kvm_vm_ioctl(s, KVM_DEASSIGN_DEV_IRQ, &assigned_irq); |
| } |
| |
| int kvm_device_intx_deassign(KVMState *s, uint32_t dev_id, bool use_host_msi) |
| { |
| return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_INTX | |
| (use_host_msi ? KVM_DEV_IRQ_HOST_MSI : KVM_DEV_IRQ_HOST_INTX)); |
| } |
| |
| int kvm_device_msi_assign(KVMState *s, uint32_t dev_id, int virq) |
| { |
| return kvm_assign_irq_internal(s, dev_id, KVM_DEV_IRQ_HOST_MSI | |
| KVM_DEV_IRQ_GUEST_MSI, virq); |
| } |
| |
| int kvm_device_msi_deassign(KVMState *s, uint32_t dev_id) |
| { |
| return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_MSI | |
| KVM_DEV_IRQ_HOST_MSI); |
| } |
| |
| bool kvm_device_msix_supported(KVMState *s) |
| { |
| /* The kernel lacks a corresponding KVM_CAP, so we probe by calling |
| * KVM_ASSIGN_SET_MSIX_NR with an invalid parameter. */ |
| return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, NULL) == -EFAULT; |
| } |
| |
| int kvm_device_msix_init_vectors(KVMState *s, uint32_t dev_id, |
| uint32_t nr_vectors) |
| { |
| struct kvm_assigned_msix_nr msix_nr = { |
| .assigned_dev_id = dev_id, |
| .entry_nr = nr_vectors, |
| }; |
| |
| return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, &msix_nr); |
| } |
| |
| int kvm_device_msix_set_vector(KVMState *s, uint32_t dev_id, uint32_t vector, |
| int virq) |
| { |
| struct kvm_assigned_msix_entry msix_entry = { |
| .assigned_dev_id = dev_id, |
| .gsi = virq, |
| .entry = vector, |
| }; |
| |
| return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_ENTRY, &msix_entry); |
| } |
| |
| int kvm_device_msix_assign(KVMState *s, uint32_t dev_id) |
| { |
| return kvm_assign_irq_internal(s, dev_id, KVM_DEV_IRQ_HOST_MSIX | |
| KVM_DEV_IRQ_GUEST_MSIX, 0); |
| } |
| |
| int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id) |
| { |
| return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_MSIX | |
| KVM_DEV_IRQ_HOST_MSIX); |
| } |
