diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/kvm/cpuid.c | 13 | ||||
-rw-r--r-- | arch/x86/kvm/i8259.c | 3 | ||||
-rw-r--r-- | arch/x86/kvm/lapic.c | 5 | ||||
-rw-r--r-- | arch/x86/kvm/mtrr.c | 64 | ||||
-rw-r--r-- | arch/x86/kvm/svm/svm.c | 9 | ||||
-rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 11 | ||||
-rw-r--r-- | arch/x86/kvm/x86.c | 56 | ||||
-rw-r--r-- | arch/x86/kvm/x86.h | 1 |
8 files changed, 77 insertions, 85 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 0c9660a07b23..241f554f1764 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -501,20 +501,15 @@ 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; + return -E2BIG; + if (copy_to_user(entries, vcpu->arch.cpuid_entries, vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) - goto out; - return 0; + return -EFAULT; -out: cpuid->nent = vcpu->arch.cpuid_nent; - return r; + return 0; } /* Mask kvm_cpu_caps for @leaf with the raw CPUID capabilities of this CPU. */ diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index 4756bcb5724f..8dec646e764b 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -411,7 +411,10 @@ static u32 pic_poll_read(struct kvm_kpic_state *s, u32 addr1) pic_clear_isr(s, ret); if (addr1 >> 7 || ret != 2) pic_update_irq(s->pics_state); + /* Bit 7 is 1, means there's an interrupt */ + ret |= 0x80; } else { + /* Bit 7 is 0, means there's no interrupt */ ret = 0x07; pic_update_irq(s->pics_state); } diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 3c300a196bdf..113ca9661ab2 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -51,11 +51,6 @@ #define mod_64(x, y) ((x) % (y)) #endif -#define PRId64 "d" -#define PRIx64 "llx" -#define PRIu64 "u" -#define PRIo64 "o" - /* 14 is the version for Xeon and Pentium 8.4.8*/ #define APIC_VERSION 0x14UL #define LAPIC_MMIO_LENGTH (1 << 12) diff --git a/arch/x86/kvm/mtrr.c b/arch/x86/kvm/mtrr.c index 9fac1ec03463..3eb6e7f47e96 100644 --- a/arch/x86/kvm/mtrr.c +++ b/arch/x86/kvm/mtrr.c @@ -25,10 +25,24 @@ #define IA32_MTRR_DEF_TYPE_FE (1ULL << 10) #define IA32_MTRR_DEF_TYPE_TYPE_MASK (0xff) +static bool is_mtrr_base_msr(unsigned int msr) +{ + /* MTRR base MSRs use even numbers, masks use odd numbers. */ + return !(msr & 0x1); +} + +static struct kvm_mtrr_range *var_mtrr_msr_to_range(struct kvm_vcpu *vcpu, + unsigned int msr) +{ + int index = (msr - MTRRphysBase_MSR(0)) / 2; + + return &vcpu->arch.mtrr_state.var_ranges[index]; +} + static bool msr_mtrr_valid(unsigned msr) { switch (msr) { - case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: + case MTRRphysBase_MSR(0) ... MTRRphysMask_MSR(KVM_NR_VAR_MTRR - 1): case MSR_MTRRfix64K_00000: case MSR_MTRRfix16K_80000: case MSR_MTRRfix16K_A0000: @@ -41,7 +55,6 @@ static bool msr_mtrr_valid(unsigned msr) case MSR_MTRRfix4K_F0000: case MSR_MTRRfix4K_F8000: case MSR_MTRRdefType: - case MSR_IA32_CR_PAT: return true; } return false; @@ -52,7 +65,7 @@ static bool valid_mtrr_type(unsigned t) return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ } -bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) +static bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) { int i; u64 mask; @@ -60,9 +73,7 @@ bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) if (!msr_mtrr_valid(msr)) return false; - if (msr == MSR_IA32_CR_PAT) { - return kvm_pat_valid(data); - } else if (msr == MSR_MTRRdefType) { + if (msr == MSR_MTRRdefType) { if (data & ~0xcff) return false; return valid_mtrr_type(data & 0xff); @@ -74,7 +85,8 @@ bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) } /* variable MTRRs */ - WARN_ON(!(msr >= 0x200 && msr < 0x200 + 2 * KVM_NR_VAR_MTRR)); + WARN_ON(!(msr >= MTRRphysBase_MSR(0) && + msr <= MTRRphysMask_MSR(KVM_NR_VAR_MTRR - 1))); mask = kvm_vcpu_reserved_gpa_bits_raw(vcpu); if ((msr & 1) == 0) { @@ -88,7 +100,6 @@ bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) return (data & mask) == 0; } -EXPORT_SYMBOL_GPL(kvm_mtrr_valid); static bool mtrr_is_enabled(struct kvm_mtrr *mtrr_state) { @@ -308,10 +319,8 @@ static void update_mtrr(struct kvm_vcpu *vcpu, u32 msr) { struct kvm_mtrr *mtrr_state = &vcpu->arch.mtrr_state; gfn_t start, end; - int index; - if (msr == MSR_IA32_CR_PAT || !tdp_enabled || - !kvm_arch_has_noncoherent_dma(vcpu->kvm)) + if (!tdp_enabled || !kvm_arch_has_noncoherent_dma(vcpu->kvm)) return; if (!mtrr_is_enabled(mtrr_state) && msr != MSR_MTRRdefType) @@ -326,8 +335,7 @@ static void update_mtrr(struct kvm_vcpu *vcpu, u32 msr) end = ~0ULL; } else { /* variable range MTRRs. */ - index = (msr - 0x200) / 2; - var_mtrr_range(&mtrr_state->var_ranges[index], &start, &end); + var_mtrr_range(var_mtrr_msr_to_range(vcpu, msr), &start, &end); } kvm_zap_gfn_range(vcpu->kvm, gpa_to_gfn(start), gpa_to_gfn(end)); @@ -342,21 +350,18 @@ static void set_var_mtrr_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data) { struct kvm_mtrr *mtrr_state = &vcpu->arch.mtrr_state; struct kvm_mtrr_range *tmp, *cur; - int index, is_mtrr_mask; - index = (msr - 0x200) / 2; - is_mtrr_mask = msr - 0x200 - 2 * index; - cur = &mtrr_state->var_ranges[index]; + cur = var_mtrr_msr_to_range(vcpu, msr); /* remove the entry if it's in the list. */ if (var_mtrr_range_is_valid(cur)) - list_del(&mtrr_state->var_ranges[index].node); + list_del(&cur->node); /* * Set all illegal GPA bits in the mask, since those bits must * implicitly be 0. The bits are then cleared when reading them. */ - if (!is_mtrr_mask) + if (is_mtrr_base_msr(msr)) cur->base = data; else cur->mask = data | kvm_vcpu_reserved_gpa_bits_raw(vcpu); @@ -382,8 +387,6 @@ int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data) *(u64 *)&vcpu->arch.mtrr_state.fixed_ranges[index] = data; else if (msr == MSR_MTRRdefType) vcpu->arch.mtrr_state.deftype = data; - else if (msr == MSR_IA32_CR_PAT) - vcpu->arch.pat = data; else set_var_mtrr_msr(vcpu, msr, data); @@ -411,21 +414,16 @@ int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) return 1; index = fixed_msr_to_range_index(msr); - if (index >= 0) + if (index >= 0) { *pdata = *(u64 *)&vcpu->arch.mtrr_state.fixed_ranges[index]; - else if (msr == MSR_MTRRdefType) + } else if (msr == MSR_MTRRdefType) { *pdata = vcpu->arch.mtrr_state.deftype; - else if (msr == MSR_IA32_CR_PAT) - *pdata = vcpu->arch.pat; - else { /* Variable MTRRs */ - int is_mtrr_mask; - - index = (msr - 0x200) / 2; - is_mtrr_mask = msr - 0x200 - 2 * index; - if (!is_mtrr_mask) - *pdata = vcpu->arch.mtrr_state.var_ranges[index].base; + } else { + /* Variable MTRRs */ + if (is_mtrr_base_msr(msr)) + *pdata = var_mtrr_msr_to_range(vcpu, msr)->base; else - *pdata = vcpu->arch.mtrr_state.var_ranges[index].mask; + *pdata = var_mtrr_msr_to_range(vcpu, msr)->mask; *pdata &= ~kvm_vcpu_reserved_gpa_bits_raw(vcpu); } diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 54089f990c8f..488b9d6a27b7 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -752,7 +752,7 @@ static bool msr_write_intercepted(struct kvm_vcpu *vcpu, u32 msr) BUG_ON(offset == MSR_INVALID); - return !!test_bit(bit_write, &tmp); + return test_bit(bit_write, &tmp); } static void set_msr_interception_bitmap(struct kvm_vcpu *vcpu, u32 *msrpm, @@ -2939,9 +2939,10 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) break; case MSR_IA32_CR_PAT: - if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data)) - return 1; - vcpu->arch.pat = data; + ret = kvm_set_msr_common(vcpu, msr); + if (ret) + break; + svm->vmcb01.ptr->save.g_pat = data; if (is_guest_mode(vcpu)) nested_vmcb02_compute_g_pat(svm); diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 44fb619803b8..2d9d155691a7 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -2287,19 +2287,16 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) return 1; goto find_uret_msr; case MSR_IA32_CR_PAT: - if (!kvm_pat_valid(data)) - return 1; + ret = kvm_set_msr_common(vcpu, msr_info); + if (ret) + break; if (is_guest_mode(vcpu) && get_vmcs12(vcpu)->vm_exit_controls & VM_EXIT_SAVE_IA32_PAT) get_vmcs12(vcpu)->guest_ia32_pat = data; - if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { + if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) vmcs_write64(GUEST_IA32_PAT, data); - vcpu->arch.pat = data; - break; - } - ret = kvm_set_msr_common(vcpu, msr_info); break; case MSR_IA32_MCG_EXT_CTL: if ((!msr_info->host_initiated && diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 04b57a336b34..07e60e5f232a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1017,13 +1017,11 @@ void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu) wrmsrl(MSR_IA32_XSS, vcpu->arch.ia32_xss); } -#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS - if (static_cpu_has(X86_FEATURE_PKU) && + if (cpu_feature_enabled(X86_FEATURE_PKU) && vcpu->arch.pkru != vcpu->arch.host_pkru && ((vcpu->arch.xcr0 & XFEATURE_MASK_PKRU) || kvm_is_cr4_bit_set(vcpu, X86_CR4_PKE))) write_pkru(vcpu->arch.pkru); -#endif /* CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS */ } EXPORT_SYMBOL_GPL(kvm_load_guest_xsave_state); @@ -1032,15 +1030,13 @@ void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu) if (vcpu->arch.guest_state_protected) return; -#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS - if (static_cpu_has(X86_FEATURE_PKU) && + if (cpu_feature_enabled(X86_FEATURE_PKU) && ((vcpu->arch.xcr0 & XFEATURE_MASK_PKRU) || kvm_is_cr4_bit_set(vcpu, X86_CR4_PKE))) { vcpu->arch.pkru = rdpkru(); if (vcpu->arch.pkru != vcpu->arch.host_pkru) write_pkru(vcpu->arch.host_pkru); } -#endif /* CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS */ if (kvm_is_cr4_bit_set(vcpu, X86_CR4_OSXSAVE)) { @@ -1427,15 +1423,14 @@ int kvm_emulate_rdpmc(struct kvm_vcpu *vcpu) EXPORT_SYMBOL_GPL(kvm_emulate_rdpmc); /* - * List of msr numbers which we expose to userspace through KVM_GET_MSRS - * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. - * - * The three MSR lists(msrs_to_save, emulated_msrs, msr_based_features) - * extract the supported MSRs from the related const lists. - * msrs_to_save is selected from the msrs_to_save_all to reflect the - * capabilities of the host cpu. This capabilities test skips MSRs that are - * kvm-specific. Those are put in emulated_msrs_all; filtering of emulated_msrs - * may depend on host virtualization features rather than host cpu features. + * The three MSR lists(msrs_to_save, emulated_msrs, msr_based_features) track + * the set of MSRs that KVM exposes to userspace through KVM_GET_MSRS, + * KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. msrs_to_save holds MSRs that + * require host support, i.e. should be probed via RDMSR. emulated_msrs holds + * MSRs that KVM emulates without strictly requiring host support. + * msr_based_features holds MSRs that enumerate features, i.e. are effectively + * CPUID leafs. Note, msr_based_features isn't mutually exclusive with + * msrs_to_save and emulated_msrs. */ static const u32 msrs_to_save_base[] = { @@ -1531,11 +1526,11 @@ static const u32 emulated_msrs_all[] = { MSR_IA32_UCODE_REV, /* - * The following list leaves out MSRs whose values are determined - * by arch/x86/kvm/vmx/nested.c based on CPUID or other MSRs. - * We always support the "true" VMX control MSRs, even if the host - * processor does not, so I am putting these registers here rather - * than in msrs_to_save_all. + * KVM always supports the "true" VMX control MSRs, even if the host + * does not. The VMX MSRs as a whole are considered "emulated" as KVM + * doesn't strictly require them to exist in the host (ignoring that + * KVM would refuse to load in the first place if the core set of MSRs + * aren't supported). */ MSR_IA32_VMX_BASIC, MSR_IA32_VMX_TRUE_PINBASED_CTLS, @@ -1631,7 +1626,7 @@ static u64 kvm_get_arch_capabilities(void) * If we're doing cache flushes (either "always" or "cond") * we will do one whenever the guest does a vmlaunch/vmresume. * If an outer hypervisor is doing the cache flush for us - * (VMENTER_L1D_FLUSH_NESTED_VM), we can safely pass that + * (ARCH_CAP_SKIP_VMENTRY_L1DFLUSH), we can safely pass that * capability to the guest too, and if EPT is disabled we're not * vulnerable. Overall, only VMENTER_L1D_FLUSH_NEVER will * require a nested hypervisor to do a flush of its own. @@ -1809,7 +1804,7 @@ bool kvm_msr_allowed(struct kvm_vcpu *vcpu, u32 index, u32 type) unsigned long *bitmap = ranges[i].bitmap; if ((index >= start) && (index < end) && (flags & type)) { - allowed = !!test_bit(index - start, bitmap); + allowed = test_bit(index - start, bitmap); break; } } @@ -3702,8 +3697,14 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) return 1; } break; - case 0x200 ... MSR_IA32_MC0_CTL2 - 1: - case MSR_IA32_MCx_CTL2(KVM_MAX_MCE_BANKS) ... 0x2ff: + case MSR_IA32_CR_PAT: + if (!kvm_pat_valid(data)) + return 1; + + vcpu->arch.pat = data; + break; + case MTRRphysBase_MSR(0) ... MSR_MTRRfix4K_F8000: + case MSR_MTRRdefType: return kvm_mtrr_set_msr(vcpu, msr, data); case MSR_IA32_APICBASE: return kvm_set_apic_base(vcpu, msr_info); @@ -4110,9 +4111,12 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) msr_info->data = kvm_scale_tsc(rdtsc(), ratio) + offset; break; } + case MSR_IA32_CR_PAT: + msr_info->data = vcpu->arch.pat; + break; case MSR_MTRRcap: - case 0x200 ... MSR_IA32_MC0_CTL2 - 1: - case MSR_IA32_MCx_CTL2(KVM_MAX_MCE_BANKS) ... 0x2ff: + case MTRRphysBase_MSR(0) ... MSR_MTRRfix4K_F8000: + case MSR_MTRRdefType: return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); case 0xcd: /* fsb frequency */ msr_info->data = 3; diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index c544602d07a3..82e3dafc5453 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -309,7 +309,6 @@ void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu, void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu); u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); -bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data); int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data); int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn, |