diff options
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 1008 |
1 files changed, 227 insertions, 781 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c38efd7b792e..1171def5f96b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -26,6 +26,7 @@ #include "tss.h" #include "kvm_cache_regs.h" #include "x86.h" +#include "cpuid.h" #include <linux/clocksource.h> #include <linux/interrupt.h> @@ -82,8 +83,6 @@ static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU static void update_cr8_intercept(struct kvm_vcpu *vcpu); -static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, - struct kvm_cpuid_entry2 __user *entries); static void process_nmi(struct kvm_vcpu *vcpu); struct kvm_x86_ops *kvm_x86_ops; @@ -574,58 +573,6 @@ int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) } EXPORT_SYMBOL_GPL(kvm_set_xcr); -static bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu) -{ - struct kvm_cpuid_entry2 *best; - - best = kvm_find_cpuid_entry(vcpu, 1, 0); - return best && (best->ecx & bit(X86_FEATURE_XSAVE)); -} - -static bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu) -{ - struct kvm_cpuid_entry2 *best; - - best = kvm_find_cpuid_entry(vcpu, 7, 0); - return best && (best->ebx & bit(X86_FEATURE_SMEP)); -} - -static bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu) -{ - struct kvm_cpuid_entry2 *best; - - best = kvm_find_cpuid_entry(vcpu, 7, 0); - return best && (best->ebx & bit(X86_FEATURE_FSGSBASE)); -} - -static void update_cpuid(struct kvm_vcpu *vcpu) -{ - struct kvm_cpuid_entry2 *best; - struct kvm_lapic *apic = vcpu->arch.apic; - u32 timer_mode_mask; - - best = kvm_find_cpuid_entry(vcpu, 1, 0); - if (!best) - return; - - /* Update OSXSAVE bit */ - if (cpu_has_xsave && best->function == 0x1) { - best->ecx &= ~(bit(X86_FEATURE_OSXSAVE)); - if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) - best->ecx |= bit(X86_FEATURE_OSXSAVE); - } - - if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && - best->function == 0x1) { - best->ecx |= bit(X86_FEATURE_TSC_DEADLINE_TIMER); - timer_mode_mask = 3 << 17; - } else - timer_mode_mask = 1 << 17; - - if (apic) - apic->lapic_timer.timer_mode_mask = timer_mode_mask; -} - int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) { unsigned long old_cr4 = kvm_read_cr4(vcpu); @@ -659,7 +606,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) kvm_mmu_reset_context(vcpu); if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) - update_cpuid(vcpu); + kvm_update_cpuid(vcpu); return 0; } @@ -813,6 +760,21 @@ int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) } EXPORT_SYMBOL_GPL(kvm_get_dr); +bool kvm_rdpmc(struct kvm_vcpu *vcpu) +{ + u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); + u64 data; + int err; + + err = kvm_pmu_read_pmc(vcpu, ecx, &data); + if (err) + return err; + kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); + kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); + return err; +} +EXPORT_SYMBOL_GPL(kvm_rdpmc); + /* * List of msr numbers which we expose to userspace through KVM_GET_MSRS * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. @@ -1362,12 +1324,11 @@ static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) if (page_num >= blob_size) goto out; r = -ENOMEM; - page = kzalloc(PAGE_SIZE, GFP_KERNEL); - if (!page) + page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); + if (IS_ERR(page)) { + r = PTR_ERR(page); goto out; - r = -EFAULT; - if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) - goto out_free; + } if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) goto out_free; r = 0; @@ -1656,8 +1617,6 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) * which we perfectly emulate ;-). Any other value should be at least * reported, some guests depend on them. */ - case MSR_P6_EVNTSEL0: - case MSR_P6_EVNTSEL1: case MSR_K7_EVNTSEL0: case MSR_K7_EVNTSEL1: case MSR_K7_EVNTSEL2: @@ -1669,8 +1628,6 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) /* at least RHEL 4 unconditionally writes to the perfctr registers, * so we ignore writes to make it happy. */ - case MSR_P6_PERFCTR0: - case MSR_P6_PERFCTR1: case MSR_K7_PERFCTR0: case MSR_K7_PERFCTR1: case MSR_K7_PERFCTR2: @@ -1707,6 +1664,8 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) default: if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) return xen_hvm_config(vcpu, data); + if (kvm_pmu_msr(vcpu, msr)) + return kvm_pmu_set_msr(vcpu, msr, data); if (!ignore_msrs) { pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data); @@ -1869,10 +1828,6 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) case MSR_K8_SYSCFG: case MSR_K7_HWCR: case MSR_VM_HSAVE_PA: - case MSR_P6_PERFCTR0: - case MSR_P6_PERFCTR1: - case MSR_P6_EVNTSEL0: - case MSR_P6_EVNTSEL1: case MSR_K7_EVNTSEL0: case MSR_K7_PERFCTR0: case MSR_K8_INT_PENDING_MSG: @@ -1983,6 +1938,8 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) data = 0xbe702111; break; default: + if (kvm_pmu_msr(vcpu, msr)) + return kvm_pmu_get_msr(vcpu, msr, pdata); if (!ignore_msrs) { pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); return 1; @@ -2041,15 +1998,12 @@ static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, if (msrs.nmsrs >= MAX_IO_MSRS) goto out; - r = -ENOMEM; size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; - entries = kmalloc(size, GFP_KERNEL); - if (!entries) + entries = memdup_user(user_msrs->entries, size); + if (IS_ERR(entries)) { + r = PTR_ERR(entries); goto out; - - r = -EFAULT; - if (copy_from_user(entries, user_msrs->entries, size)) - goto out_free; + } r = n = __msr_io(vcpu, &msrs, entries, do_msr); if (r < 0) @@ -2135,6 +2089,9 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_TSC_CONTROL: r = kvm_has_tsc_control; break; + case KVM_CAP_TSC_DEADLINE_TIMER: + r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER); + break; default: r = 0; break; @@ -2266,466 +2223,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu); } -static int is_efer_nx(void) -{ - unsigned long long efer = 0; - - rdmsrl_safe(MSR_EFER, &efer); - return efer & EFER_NX; -} - -static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) -{ - int i; - struct kvm_cpuid_entry2 *e, *entry; - - entry = NULL; - for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { - e = &vcpu->arch.cpuid_entries[i]; - if (e->function == 0x80000001) { - entry = e; - break; - } - } - if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { - entry->edx &= ~(1 << 20); - printk(KERN_INFO "kvm: guest NX capability removed\n"); - } -} - -/* when an old userspace process fills a new kernel module */ -static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, - struct kvm_cpuid *cpuid, - struct kvm_cpuid_entry __user *entries) -{ - int r, i; - struct kvm_cpuid_entry *cpuid_entries; - - r = -E2BIG; - if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) - goto out; - r = -ENOMEM; - cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); - if (!cpuid_entries) - goto out; - r = -EFAULT; - if (copy_from_user(cpuid_entries, entries, - cpuid->nent * sizeof(struct kvm_cpuid_entry))) - goto out_free; - for (i = 0; i < cpuid->nent; i++) { - vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; - vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; - vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; - vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; - vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; - vcpu->arch.cpuid_entries[i].index = 0; - vcpu->arch.cpuid_entries[i].flags = 0; - vcpu->arch.cpuid_entries[i].padding[0] = 0; - vcpu->arch.cpuid_entries[i].padding[1] = 0; - vcpu->arch.cpuid_entries[i].padding[2] = 0; - } - vcpu->arch.cpuid_nent = cpuid->nent; - cpuid_fix_nx_cap(vcpu); - r = 0; - kvm_apic_set_version(vcpu); - kvm_x86_ops->cpuid_update(vcpu); - update_cpuid(vcpu); - -out_free: - vfree(cpuid_entries); -out: - return r; -} - -static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, - struct kvm_cpuid2 *cpuid, - struct kvm_cpuid_entry2 __user *entries) -{ - int r; - - r = -E2BIG; - if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) - goto out; - r = -EFAULT; - if (copy_from_user(&vcpu->arch.cpuid_entries, entries, - cpuid->nent * sizeof(struct kvm_cpuid_entry2))) - goto out; - vcpu->arch.cpuid_nent = cpuid->nent; - kvm_apic_set_version(vcpu); - kvm_x86_ops->cpuid_update(vcpu); - update_cpuid(vcpu); - return 0; - -out: - return r; -} - -static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, - struct kvm_cpuid2 *cpuid, - struct kvm_cpuid_entry2 __user *entries) -{ - int r; - - r = -E2BIG; - if (cpuid->nent < vcpu->arch.cpuid_nent) - goto out; - r = -EFAULT; - if (copy_to_user(entries, &vcpu->arch.cpuid_entries, - vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) - goto out; - return 0; - -out: - cpuid->nent = vcpu->arch.cpuid_nent; - return r; -} - -static void cpuid_mask(u32 *word, int wordnum) -{ - *word &= boot_cpu_data.x86_capability[wordnum]; -} - -static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, - u32 index) -{ - entry->function = function; - entry->index = index; - cpuid_count(entry->function, entry->index, - &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); - entry->flags = 0; -} - -static bool supported_xcr0_bit(unsigned bit) -{ - u64 mask = ((u64)1 << bit); - - return mask & (XSTATE_FP | XSTATE_SSE | XSTATE_YMM) & host_xcr0; -} - -#define F(x) bit(X86_FEATURE_##x) - -static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, - u32 index, int *nent, int maxnent) -{ - unsigned f_nx = is_efer_nx() ? F(NX) : 0; -#ifdef CONFIG_X86_64 - unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) - ? F(GBPAGES) : 0; - unsigned f_lm = F(LM); -#else - unsigned f_gbpages = 0; - unsigned f_lm = 0; -#endif - unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; - - /* cpuid 1.edx */ - const u32 kvm_supported_word0_x86_features = - F(FPU) | F(VME) | F(DE) | F(PSE) | - F(TSC) | F(MSR) | F(PAE) | F(MCE) | - F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | - F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | - F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | - 0 /* Reserved, DS, ACPI */ | F(MMX) | - F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | - 0 /* HTT, TM, Reserved, PBE */; - /* cpuid 0x80000001.edx */ - const u32 kvm_supported_word1_x86_features = - F(FPU) | F(VME) | F(DE) | F(PSE) | - F(TSC) | F(MSR) | F(PAE) | F(MCE) | - F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | - F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | - F(PAT) | F(PSE36) | 0 /* Reserved */ | - f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | - F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | - 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); - /* cpuid 1.ecx */ - const u32 kvm_supported_word4_x86_features = - F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ | - 0 /* DS-CPL, VMX, SMX, EST */ | - 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | - 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | - 0 /* Reserved, DCA */ | F(XMM4_1) | - F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | - 0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) | - F(F16C) | F(RDRAND); - /* cpuid 0x80000001.ecx */ - const u32 kvm_supported_word6_x86_features = - F(LAHF_LM) | F(CMP_LEGACY) | 0 /*SVM*/ | 0 /* ExtApicSpace */ | - F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | - F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) | - 0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM); - - /* cpuid 0xC0000001.edx */ - const u32 kvm_supported_word5_x86_features = - F(XSTORE) | F(XSTORE_EN) | F(XCRYPT) | F(XCRYPT_EN) | - F(ACE2) | F(ACE2_EN) | F(PHE) | F(PHE_EN) | - F(PMM) | F(PMM_EN); - - /* cpuid 7.0.ebx */ - const u32 kvm_supported_word9_x86_features = - F(SMEP) | F(FSGSBASE) | F(ERMS); - - /* all calls to cpuid_count() should be made on the same cpu */ - get_cpu(); - do_cpuid_1_ent(entry, function, index); - ++*nent; - - switch (function) { - case 0: - entry->eax = min(entry->eax, (u32)0xd); - break; - case 1: - entry->edx &= kvm_supported_word0_x86_features; - cpuid_mask(&entry->edx, 0); - entry->ecx &= kvm_supported_word4_x86_features; - cpuid_mask(&entry->ecx, 4); - /* we support x2apic emulation even if host does not support - * it since we emulate x2apic in software */ - entry->ecx |= F(X2APIC); - break; - /* function 2 entries are STATEFUL. That is, repeated cpuid commands - * may return different values. This forces us to get_cpu() before - * issuing the first command, and also to emulate this annoying behavior - * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ - case 2: { - int t, times = entry->eax & 0xff; - - entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; - entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; - for (t = 1; t < times && *nent < maxnent; ++t) { - do_cpuid_1_ent(&entry[t], function, 0); - entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; - ++*nent; - } - break; - } - /* function 4 has additional index. */ - case 4: { - int i, cache_type; - - entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - /* read more entries until cache_type is zero */ - for (i = 1; *nent < maxnent; ++i) { - cache_type = entry[i - 1].eax & 0x1f; - if (!cache_type) - break; - do_cpuid_1_ent(&entry[i], function, i); - entry[i].flags |= - KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - ++*nent; - } - break; - } - case 7: { - entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - /* Mask ebx against host capbability word 9 */ - if (index == 0) { - entry->ebx &= kvm_supported_word9_x86_features; - cpuid_mask(&entry->ebx, 9); - } else - entry->ebx = 0; - entry->eax = 0; - entry->ecx = 0; - entry->edx = 0; - break; - } - case 9: - break; - /* function 0xb has additional index. */ - case 0xb: { - int i, level_type; - - entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - /* read more entries until level_type is zero */ - for (i = 1; *nent < maxnent; ++i) { - level_type = entry[i - 1].ecx & 0xff00; - if (!level_type) - break; - do_cpuid_1_ent(&entry[i], function, i); - entry[i].flags |= - KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - ++*nent; - } - break; - } - case 0xd: { - int idx, i; - - entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - for (idx = 1, i = 1; *nent < maxnent && idx < 64; ++idx) { - do_cpuid_1_ent(&entry[i], function, idx); - if (entry[i].eax == 0 || !supported_xcr0_bit(idx)) - continue; - entry[i].flags |= - KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - ++*nent; - ++i; - } - break; - } - case KVM_CPUID_SIGNATURE: { - char signature[12] = "KVMKVMKVM\0\0"; - u32 *sigptr = (u32 *)signature; - entry->eax = 0; - entry->ebx = sigptr[0]; - entry->ecx = sigptr[1]; - entry->edx = sigptr[2]; - break; - } - case KVM_CPUID_FEATURES: - entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) | - (1 << KVM_FEATURE_NOP_IO_DELAY) | - (1 << KVM_FEATURE_CLOCKSOURCE2) | - (1 << KVM_FEATURE_ASYNC_PF) | - (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT); - - if (sched_info_on()) - entry->eax |= (1 << KVM_FEATURE_STEAL_TIME); - - entry->ebx = 0; - entry->ecx = 0; - entry->edx = 0; - break; - case 0x80000000: - entry->eax = min(entry->eax, 0x8000001a); - break; - case 0x80000001: - entry->edx &= kvm_supported_word1_x86_features; - cpuid_mask(&entry->edx, 1); - entry->ecx &= kvm_supported_word6_x86_features; - cpuid_mask(&entry->ecx, 6); - break; - case 0x80000008: { - unsigned g_phys_as = (entry->eax >> 16) & 0xff; - unsigned virt_as = max((entry->eax >> 8) & 0xff, 48U); - unsigned phys_as = entry->eax & 0xff; - - if (!g_phys_as) - g_phys_as = phys_as; - entry->eax = g_phys_as | (virt_as << 8); - entry->ebx = entry->edx = 0; - break; - } - case 0x80000019: - entry->ecx = entry->edx = 0; - break; - case 0x8000001a: - break; - case 0x8000001d: - break; - /*Add support for Centaur's CPUID instruction*/ - case 0xC0000000: - /*Just support up to 0xC0000004 now*/ - entry->eax = min(entry->eax, 0xC0000004); - break; - case 0xC0000001: - entry->edx &= kvm_supported_word5_x86_features; - cpuid_mask(&entry->edx, 5); - break; - case 3: /* Processor serial number */ - case 5: /* MONITOR/MWAIT */ - case 6: /* Thermal management */ - case 0xA: /* Architectural Performance Monitoring */ - case 0x80000007: /* Advanced power management */ - case 0xC0000002: - case 0xC0000003: - case 0xC0000004: - default: - entry->eax = entry->ebx = entry->ecx = entry->edx = 0; - break; - } - - kvm_x86_ops->set_supported_cpuid(function, entry); - - put_cpu(); -} - -#undef F - -static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, - struct kvm_cpuid_entry2 __user *entries) -{ - struct kvm_cpuid_entry2 *cpuid_entries; - int limit, nent = 0, r = -E2BIG; - u32 func; - - if (cpuid->nent < 1) - goto out; - if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) - cpuid->nent = KVM_MAX_CPUID_ENTRIES; - r = -ENOMEM; - cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); - if (!cpuid_entries) - goto out; - - do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); - limit = cpuid_entries[0].eax; - for (func = 1; func <= limit && nent < cpuid->nent; ++func) - do_cpuid_ent(&cpuid_entries[nent], func, 0, - &nent, cpuid->nent); - r = -E2BIG; - if (nent >= cpuid->nent) - goto out_free; - - do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); - limit = cpuid_entries[nent - 1].eax; - for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) - do_cpuid_ent(&cpuid_entries[nent], func, 0, - &nent, cpuid->nent); - - - - r = -E2BIG; - if (nent >= cpuid->nent) - goto out_free; - - /* Add support for Centaur's CPUID instruction. */ - if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR) { - do_cpuid_ent(&cpuid_entries[nent], 0xC0000000, 0, - &nent, cpuid->nent); - - r = -E2BIG; - if (nent >= cpuid->nent) - goto out_free; - - limit = cpuid_entries[nent - 1].eax; - for (func = 0xC0000001; - func <= limit && nent < cpuid->nent; ++func) - do_cpuid_ent(&cpuid_entries[nent], func, 0, - &nent, cpuid->nent); - - r = -E2BIG; - if (nent >= cpuid->nent) - goto out_free; - } - - do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent, - cpuid->nent); - - r = -E2BIG; - if (nent >= cpuid->nent) - goto out_free; - - do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent, - cpuid->nent); - - r = -E2BIG; - if (nent >= cpuid->nent) - goto out_free; - - r = -EFAULT; - if (copy_to_user(entries, cpuid_entries, - nent * sizeof(struct kvm_cpuid_entry2))) - goto out_free; - cpuid->nent = nent; - r = 0; - -out_free: - vfree(cpuid_entries); -out: - return r; -} - static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s) { @@ -3043,13 +2540,12 @@ long kvm_arch_vcpu_ioctl(struct file *filp, r = -EINVAL; if (!vcpu->arch.apic) goto out; - u.lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); - r = -ENOMEM; - if (!u.lapic) - goto out; - r = -EFAULT; - if (copy_from_user(u.lapic, argp, sizeof(struct kvm_lapic_state))) + u.lapic = memdup_user(argp, sizeof(*u.lapic)); + if (IS_ERR(u.lapic)) { + r = PTR_ERR(u.lapic); goto out; + } + r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); if (r) goto out; @@ -3228,14 +2724,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp, break; } case KVM_SET_XSAVE: { - u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); - r = -ENOMEM; - if (!u.xsave) - break; - - r = -EFAULT; - if (copy_from_user(u.xsave, argp, sizeof(struct kvm_xsave))) - break; + u.xsave = memdup_user(argp, sizeof(*u.xsave)); + if (IS_ERR(u.xsave)) { + r = PTR_ERR(u.xsave); + goto out; + } r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); break; @@ -3256,15 +2749,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp, break; } case KVM_SET_XCRS: { - u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); - r = -ENOMEM; - if (!u.xcrs) - break; - - r = -EFAULT; - if (copy_from_user(u.xcrs, argp, - sizeof(struct kvm_xcrs))) - break; + u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); + if (IS_ERR(u.xcrs)) { + r = PTR_ERR(u.xcrs); + goto out; + } r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); break; @@ -3461,16 +2950,59 @@ static int kvm_vm_ioctl_reinject(struct kvm *kvm, return 0; } +/** + * write_protect_slot - write protect a slot for dirty logging + * @kvm: the kvm instance + * @memslot: the slot we protect + * @dirty_bitmap: the bitmap indicating which pages are dirty + * @nr_dirty_pages: the number of dirty pages + * + * We have two ways to find all sptes to protect: + * 1. Use kvm_mmu_slot_remove_write_access() which walks all shadow pages and + * checks ones that have a spte mapping a page in the slot. + * 2. Use kvm_mmu_rmap_write_protect() for each gfn found in the bitmap. + * + * Generally speaking, if there are not so many dirty pages compared to the + * number of shadow pages, we should use the latter. + * + * Note that letting others write into a page marked dirty in the old bitmap + * by using the remaining tlb entry is not a problem. That page will become + * write protected again when we flush the tlb and then be reported dirty to + * the user space by copying the old bitmap. + */ +static void write_protect_slot(struct kvm *kvm, + struct kvm_memory_slot *memslot, + unsigned long *dirty_bitmap, + unsigned long nr_dirty_pages) +{ + /* Not many dirty pages compared to # of shadow pages. */ + if (nr_dirty_pages < kvm->arch.n_used_mmu_pages) { + unsigned long gfn_offset; + + for_each_set_bit(gfn_offset, dirty_bitmap, memslot->npages) { + unsigned long gfn = memslot->base_gfn + gfn_offset; + + spin_lock(&kvm->mmu_lock); + kvm_mmu_rmap_write_protect(kvm, gfn, memslot); + spin_unlock(&kvm->mmu_lock); + } + kvm_flush_remote_tlbs(kvm); + } else { + spin_lock(&kvm->mmu_lock); + kvm_mmu_slot_remove_write_access(kvm, memslot->id); + spin_unlock(&kvm->mmu_lock); + } +} + /* * Get (and clear) the dirty memory log for a memory slot. */ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) { - int r, i; + int r; struct kvm_memory_slot *memslot; - unsigned long n; - unsigned long is_dirty = 0; + unsigned long n, nr_dirty_pages; mutex_lock(&kvm->slots_lock); @@ -3478,43 +3010,41 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, if (log->slot >= KVM_MEMORY_SLOTS) goto out; - memslot = &kvm->memslots->memslots[log->slot]; + memslot = id_to_memslot(kvm->memslots, log->slot); r = -ENOENT; if (!memslot->dirty_bitmap) goto out; n = kvm_dirty_bitmap_bytes(memslot); - - for (i = 0; !is_dirty && i < n/sizeof(long); i++) - is_dirty = memslot->dirty_bitmap[i]; + nr_dirty_pages = memslot->nr_dirty_pages; /* If nothing is dirty, don't bother messing with page tables. */ - if (is_dirty) { + if (nr_dirty_pages) { struct kvm_memslots *slots, *old_slots; - unsigned long *dirty_bitmap; + unsigned long *dirty_bitmap, *dirty_bitmap_head; - dirty_bitmap = memslot->dirty_bitmap_head; - if (memslot->dirty_bitmap == dirty_bitmap) - dirty_bitmap += n / sizeof(long); - memset(dirty_bitmap, 0, n); + dirty_bitmap = memslot->dirty_bitmap; + dirty_bitmap_head = memslot->dirty_bitmap_head; + if (dirty_bitmap == dirty_bitmap_head) + dirty_bitmap_head += n / sizeof(long); + memset(dirty_bitmap_head, 0, n); r = -ENOMEM; - slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); + slots = kmemdup(kvm->memslots, sizeof(*kvm->memslots), GFP_KERNEL); if (!slots) goto out; - memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); - slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; - slots->generation++; + + memslot = id_to_memslot(slots, log->slot); + memslot->nr_dirty_pages = 0; + memslot->dirty_bitmap = dirty_bitmap_head; + update_memslots(slots, NULL); old_slots = kvm->memslots; rcu_assign_pointer(kvm->memslots, slots); synchronize_srcu_expedited(&kvm->srcu); - dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; kfree(old_slots); - spin_lock(&kvm->mmu_lock); - kvm_mmu_slot_remove_write_access(kvm, log->slot); - spin_unlock(&kvm->mmu_lock); + write_protect_slot(kvm, memslot, dirty_bitmap, nr_dirty_pages); r = -EFAULT; if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) @@ -3659,14 +3189,14 @@ long kvm_arch_vm_ioctl(struct file *filp, } case KVM_GET_IRQCHIP: { /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ - struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); + struct kvm_irqchip *chip; - r = -ENOMEM; - if (!chip) + chip = memdup_user(argp, sizeof(*chip)); + if (IS_ERR(chip)) { + r = PTR_ERR(chip); goto out; - r = -EFAULT; - if (copy_from_user(chip, argp, sizeof *chip)) - goto get_irqchip_out; + } + r = -ENXIO; if (!irqchip_in_kernel(kvm)) goto get_irqchip_out; @@ -3685,14 +3215,14 @@ long kvm_arch_vm_ioctl(struct file *filp, } case KVM_SET_IRQCHIP: { /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ - struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); + struct kvm_irqchip *chip; - r = -ENOMEM; - if (!chip) + chip = memdup_user(argp, sizeof(*chip)); + if (IS_ERR(chip)) { + r = PTR_ERR(chip); goto out; - r = -EFAULT; - if (copy_from_user(chip, argp, sizeof *chip)) - goto set_irqchip_out; + } + r = -ENXIO; if (!irqchip_in_kernel(kvm)) goto set_irqchip_out; @@ -3899,12 +3429,7 @@ void kvm_get_segment(struct kvm_vcpu *vcpu, kvm_x86_ops->get_segment(vcpu, var, seg); } -static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) -{ - return gpa; -} - -static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) +gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) { gpa_t t_gpa; struct x86_exception exception; @@ -4088,7 +3613,7 @@ int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); if (ret < 0) return 0; - kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); + kvm_mmu_pte_write(vcpu, gpa, val, bytes); return 1; } @@ -4325,7 +3850,7 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, if (!exchanged) return X86EMUL_CMPXCHG_FAILED; - kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1); + kvm_mmu_pte_write(vcpu, gpa, new, bytes); return X86EMUL_CONTINUE; @@ -4350,32 +3875,24 @@ static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) return r; } - -static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, - int size, unsigned short port, void *val, - unsigned int count) +static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, + unsigned short port, void *val, + unsigned int count, bool in) { - struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); - - if (vcpu->arch.pio.count) - goto data_avail; - - trace_kvm_pio(0, port, size, count); + trace_kvm_pio(!in, port, size, count); vcpu->arch.pio.port = port; - vcpu->arch.pio.in = 1; + vcpu->arch.pio.in = in; vcpu->arch.pio.count = count; vcpu->arch.pio.size = size; if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { - data_avail: - memcpy(val, vcpu->arch.pio_data, size * count); vcpu->arch.pio.count = 0; return 1; } vcpu->run->exit_reason = KVM_EXIT_IO; - vcpu->run->io.direction = KVM_EXIT_IO_IN; + vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; vcpu->run->io.size = size; vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; vcpu->run->io.count = count; @@ -4384,36 +3901,37 @@ static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, return 0; } -static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, - int size, unsigned short port, - const void *val, unsigned int count) +static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, + int size, unsigned short port, void *val, + unsigned int count) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); + int ret; - trace_kvm_pio(1, port, size, count); - - vcpu->arch.pio.port = port; - vcpu->arch.pio.in = 0; - vcpu->arch.pio.count = count; - vcpu->arch.pio.size = size; - - memcpy(vcpu->arch.pio_data, val, size * count); + if (vcpu->arch.pio.count) + goto data_avail; - if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { + ret = emulator_pio_in_out(vcpu, size, port, val, count, true); + if (ret) { +data_avail: + memcpy(val, vcpu->arch.pio_data, size * count); vcpu->arch.pio.count = 0; return 1; } - vcpu->run->exit_reason = KVM_EXIT_IO; - vcpu->run->io.direction = KVM_EXIT_IO_OUT; - vcpu->run->io.size = size; - vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; - vcpu->run->io.count = count; - vcpu->run->io.port = port; - return 0; } +static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, + int size, unsigned short port, + const void *val, unsigned int count) +{ + struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); + + memcpy(vcpu->arch.pio_data, val, size * count); + return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); +} + static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) { return kvm_x86_ops->get_segment_base(vcpu, seg); @@ -4628,6 +4146,12 @@ static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data); } +static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, + u32 pmc, u64 *pdata) +{ + return kvm_pmu_read_pmc(emul_to_vcpu(ctxt), pmc, pdata); +} + static void emulator_halt(struct x86_emulate_ctxt *ctxt) { emul_to_vcpu(ctxt)->arch.halt_request = 1; @@ -4680,6 +4204,7 @@ static struct x86_emulate_ops emulate_ops = { .set_dr = emulator_set_dr, .set_msr = emulator_set_msr, .get_msr = emulator_get_msr, + .read_pmc = emulator_read_pmc, .halt = emulator_halt, .wbinvd = emulator_wbinvd, .fix_hypercall = emulator_fix_hypercall, @@ -4837,6 +4362,50 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) return false; } +static bool retry_instruction(struct x86_emulate_ctxt *ctxt, + unsigned long cr2, int emulation_type) +{ + struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); + unsigned long last_retry_eip, last_retry_addr, gpa = cr2; + + last_retry_eip = vcpu->arch.last_retry_eip; + last_retry_addr = vcpu->arch.last_retry_addr; + + /* + * If the emulation is caused by #PF and it is non-page_table + * writing instruction, it means the VM-EXIT is caused by shadow + * page protected, we can zap the shadow page and retry this + * instruction directly. + * + * Note: if the guest uses a non-page-table modifying instruction + * on the PDE that points to the instruction, then we will unmap + * the instruction and go to an infinite loop. So, we cache the + * last retried eip and the last fault address, if we meet the eip + * and the address again, we can break out of the potential infinite + * loop. + */ + vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; + + if (!(emulation_type & EMULTYPE_RETRY)) + return false; + + if (x86_page_table_writing_insn(ctxt)) + return false; + + if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) + return false; + + vcpu->arch.last_retry_eip = ctxt->eip; + vcpu->arch.last_retry_addr = cr2; + + if (!vcpu->arch.mmu.direct_map) + gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); + + kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT); + + return true; +} + int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, int emulation_type, @@ -4878,6 +4447,9 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, return EMULATE_DONE; } + if (retry_instruction(ctxt, cr2, emulation_type)) + return EMULATE_DONE; + /* this is needed for vmware backdoor interface to work since it changes registers values during IO operation */ if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { @@ -5096,17 +4668,17 @@ static void kvm_timer_init(void) static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); -static int kvm_is_in_guest(void) +int kvm_is_in_guest(void) { - return percpu_read(current_vcpu) != NULL; + return __this_cpu_read(current_vcpu) != NULL; } static int kvm_is_user_mode(void) { int user_mode = 3; - if (percpu_read(current_vcpu)) - user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); + if (__this_cpu_read(current_vcpu)) + user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); return user_mode != 0; } @@ -5115,8 +4687,8 @@ static unsigned long kvm_get_guest_ip(void) { unsigned long ip = 0; - if (percpu_read(current_vcpu)) - ip = kvm_rip_read(percpu_read(current_vcpu)); + if (__this_cpu_read(current_vcpu)) + ip = kvm_rip_read(__this_cpu_read(current_vcpu)); return ip; } @@ -5129,13 +4701,13 @@ static struct perf_guest_info_callbacks kvm_guest_cbs = { void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) { - percpu_write(current_vcpu, vcpu); + __this_cpu_write(current_vcpu, vcpu); } EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) { - percpu_write(current_vcpu, NULL); + __this_cpu_write(current_vcpu, NULL); } EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); @@ -5234,15 +4806,6 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu) } EXPORT_SYMBOL_GPL(kvm_emulate_halt); -static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, - unsigned long a1) -{ - if (is_long_mode(vcpu)) - return a0; - else - return a0 | ((gpa_t)a1 << 32); -} - int kvm_hv_hypercall(struct kvm_vcpu *vcpu) { u64 param, ingpa, outgpa, ret; @@ -5338,9 +4901,6 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) case KVM_HC_VAPIC_POLL_IRQ: ret = 0; break; - case KVM_HC_MMU_OP: - r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); - break; default: ret = -KVM_ENOSYS; break; @@ -5370,125 +4930,6 @@ int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); } -static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) -{ - struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; - int j, nent = vcpu->arch.cpuid_nent; - - e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; - /* when no next entry is found, the current entry[i] is reselected */ - for (j = i + 1; ; j = (j + 1) % nent) { - struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; - if (ej->function == e->function) { - ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; - return j; - } - } - return 0; /* silence gcc, even though control never reaches here */ -} - -/* find an entry with matching function, matching index (if needed), and that - * should be read next (if it's stateful) */ -static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, - u32 function, u32 index) -{ - if (e->function != function) - return 0; - if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) - return 0; - if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && - !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) - return 0; - return 1; -} - -struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, - u32 function, u32 index) -{ - int i; - struct kvm_cpuid_entry2 *best = NULL; - - for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { - struct kvm_cpuid_entry2 *e; - - e = &vcpu->arch.cpuid_entries[i]; - if (is_matching_cpuid_entry(e, function, index)) { - if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) - move_to_next_stateful_cpuid_entry(vcpu, i); - best = e; - break; - } - } - return best; -} -EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); - -int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) -{ - struct kvm_cpuid_entry2 *best; - - best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); - if (!best || best->eax < 0x80000008) - goto not_found; - best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); - if (best) - return best->eax & 0xff; -not_found: - return 36; -} - -/* - * If no match is found, check whether we exceed the vCPU's limit - * and return the content of the highest valid _standard_ leaf instead. - * This is to satisfy the CPUID specification. - */ -static struct kvm_cpuid_entry2* check_cpuid_limit(struct kvm_vcpu *vcpu, - u32 function, u32 index) -{ - struct kvm_cpuid_entry2 *maxlevel; - - maxlevel = kvm_find_cpuid_entry(vcpu, function & 0x80000000, 0); - if (!maxlevel || maxlevel->eax >= function) - return NULL; - if (function & 0x80000000) { - maxlevel = kvm_find_cpuid_entry(vcpu, 0, 0); - if (!maxlevel) - return NULL; - } - return kvm_find_cpuid_entry(vcpu, maxlevel->eax, index); -} - -void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) -{ - u32 function, index; - struct kvm_cpuid_entry2 *best; - - function = kvm_register_read(vcpu, VCPU_REGS_RAX); - index = kvm_register_read(vcpu, VCPU_REGS_RCX); - kvm_register_write(vcpu, VCPU_REGS_RAX, 0); - kvm_register_write(vcpu, VCPU_REGS_RBX, 0); - kvm_register_write(vcpu, VCPU_REGS_RCX, 0); - kvm_register_write(vcpu, VCPU_REGS_RDX, 0); - best = kvm_find_cpuid_entry(vcpu, function, index); - - if (!best) - best = check_cpuid_limit(vcpu, function, index); - - if (best) { - kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); - kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); - kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); - kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); - } - kvm_x86_ops->skip_emulated_instruction(vcpu); - trace_kvm_cpuid(function, - kvm_register_read(vcpu, VCPU_REGS_RAX), - kvm_register_read(vcpu, VCPU_REGS_RBX), - kvm_register_read(vcpu, VCPU_REGS_RCX), - kvm_register_read(vcpu, VCPU_REGS_RDX)); -} -EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); - /* * Check if userspace requested an interrupt window, and that the * interrupt window is open. @@ -5649,6 +5090,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) int r; bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && vcpu->run->request_interrupt_window; + bool req_immediate_exit = 0; if (vcpu->requests) { if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) @@ -5688,7 +5130,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) record_steal_time(vcpu); if (kvm_check_request(KVM_REQ_NMI, vcpu)) process_nmi(vcpu); - + req_immediate_exit = + kvm_check_request(KVM_REQ_IMMEDIATE_EXIT, vcpu); + if (kvm_check_request(KVM_REQ_PMU, vcpu)) + kvm_handle_pmu_event(vcpu); + if (kvm_check_request(KVM_REQ_PMI, vcpu)) + kvm_deliver_pmi(vcpu); } r = kvm_mmu_reload(vcpu); @@ -5739,6 +5186,9 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); + if (req_immediate_exit) + smp_send_reschedule(vcpu->cpu); + kvm_guest_enter(); if (unlikely(vcpu->arch.switch_db_regs)) { @@ -5944,10 +5394,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) if (r <= 0) goto out; - if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) - kvm_register_write(vcpu, VCPU_REGS_RAX, - kvm_run->hypercall.ret); - r = __vcpu_run(vcpu); out: @@ -6149,7 +5595,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; kvm_x86_ops->set_cr4(vcpu, sregs->cr4); if (sregs->cr4 & X86_CR4_OSXSAVE) - update_cpuid(vcpu); + kvm_update_cpuid(vcpu); idx = srcu_read_lock(&vcpu->kvm->srcu); if (!is_long_mode(vcpu) && is_pae(vcpu)) { @@ -6426,6 +5872,8 @@ int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) kvm_async_pf_hash_reset(vcpu); vcpu->arch.apf.halted = false; + kvm_pmu_reset(vcpu); + return kvm_x86_ops->vcpu_reset(vcpu); } @@ -6474,10 +5922,6 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) kvm = vcpu->kvm; vcpu->arch.emulate_ctxt.ops = &emulate_ops; - vcpu->arch.walk_mmu = &vcpu->arch.mmu; - vcpu->arch.mmu.root_hpa = INVALID_PAGE; - vcpu->arch.mmu.translate_gpa = translate_gpa; - vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa; if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; else @@ -6514,6 +5958,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) goto fail_free_mce_banks; kvm_async_pf_hash_reset(vcpu); + kvm_pmu_init(vcpu); return 0; fail_free_mce_banks: @@ -6532,6 +5977,7 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) { int idx; + kvm_pmu_destroy(vcpu); kfree(vcpu->arch.mce_banks); kvm_free_lapic(vcpu); idx = srcu_read_lock(&vcpu->kvm->srcu); |
