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KVM: x86: generalize guest_cpuid_has_ helpers
This patch turns guest_cpuid_has_XYZ(cpuid) into guest_cpuid_has(cpuid, X86_FEATURE_XYZ), which gets rid of many very similar helpers. When seeing a X86_FEATURE_*, we can know which cpuid it belongs to, but this information isn't in common code, so we recreate it for KVM. Add some BUILD_BUG_ONs to make sure that it runs nicely. Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Radim Krčmář
Paolo Bonzini
parent
c6bd18011f
commit
d6321d4933
@ -3,6 +3,7 @@
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#include "x86.h"
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#include <asm/cpu.h>
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#include <asm/processor.h>
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int kvm_update_cpuid(struct kvm_vcpu *vcpu);
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bool kvm_mpx_supported(void);
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@ -29,95 +30,78 @@ static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
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return vcpu->arch.maxphyaddr;
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}
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static inline bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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struct cpuid_reg {
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u32 function;
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u32 index;
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int reg;
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};
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if (!static_cpu_has(X86_FEATURE_XSAVE))
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static const struct cpuid_reg reverse_cpuid[] = {
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[CPUID_1_EDX] = { 1, 0, CPUID_EDX},
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[CPUID_8000_0001_EDX] = {0x80000001, 0, CPUID_EDX},
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[CPUID_8086_0001_EDX] = {0x80860001, 0, CPUID_EDX},
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[CPUID_1_ECX] = { 1, 0, CPUID_ECX},
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[CPUID_C000_0001_EDX] = {0xc0000001, 0, CPUID_EDX},
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[CPUID_8000_0001_ECX] = {0xc0000001, 0, CPUID_ECX},
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[CPUID_7_0_EBX] = { 7, 0, CPUID_EBX},
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[CPUID_D_1_EAX] = { 0xd, 1, CPUID_EAX},
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[CPUID_F_0_EDX] = { 0xf, 0, CPUID_EDX},
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[CPUID_F_1_EDX] = { 0xf, 1, CPUID_EDX},
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[CPUID_8000_0008_EBX] = {0x80000008, 0, CPUID_EBX},
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[CPUID_6_EAX] = { 6, 0, CPUID_EAX},
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[CPUID_8000_000A_EDX] = {0x8000000a, 0, CPUID_EDX},
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[CPUID_7_ECX] = { 7, 0, CPUID_ECX},
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[CPUID_8000_0007_EBX] = {0x80000007, 0, CPUID_EBX},
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};
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static __always_inline struct cpuid_reg x86_feature_cpuid(unsigned x86_feature)
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{
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unsigned x86_leaf = x86_feature / 32;
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BUILD_BUG_ON(!__builtin_constant_p(x86_leaf));
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BUILD_BUG_ON(x86_leaf >= ARRAY_SIZE(reverse_cpuid));
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BUILD_BUG_ON(reverse_cpuid[x86_leaf].function == 0);
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return reverse_cpuid[x86_leaf];
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}
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static __always_inline int *guest_cpuid_get_register(struct kvm_vcpu *vcpu, unsigned x86_feature)
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{
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struct kvm_cpuid_entry2 *entry;
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const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
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entry = kvm_find_cpuid_entry(vcpu, cpuid.function, cpuid.index);
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if (!entry)
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return NULL;
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switch (cpuid.reg) {
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case CPUID_EAX:
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return &entry->eax;
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case CPUID_EBX:
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return &entry->ebx;
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case CPUID_ECX:
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return &entry->ecx;
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case CPUID_EDX:
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return &entry->edx;
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default:
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BUILD_BUG();
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return NULL;
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}
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}
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static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, unsigned x86_feature)
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{
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int *reg;
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if (x86_feature == X86_FEATURE_XSAVE &&
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!static_cpu_has(X86_FEATURE_XSAVE))
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return false;
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best = kvm_find_cpuid_entry(vcpu, 1, 0);
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return best && (best->ecx & bit(X86_FEATURE_XSAVE));
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}
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reg = guest_cpuid_get_register(vcpu, x86_feature);
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if (!reg)
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return false;
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static inline bool guest_cpuid_has_mtrr(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 1, 0);
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return best && (best->edx & bit(X86_FEATURE_MTRR));
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}
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static inline bool guest_cpuid_has_tsc_adjust(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 7, 0);
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return best && (best->ebx & bit(X86_FEATURE_TSC_ADJUST));
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}
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static inline bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 7, 0);
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return best && (best->ebx & bit(X86_FEATURE_SMEP));
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}
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static inline bool guest_cpuid_has_smap(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 7, 0);
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return best && (best->ebx & bit(X86_FEATURE_SMAP));
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}
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static inline bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 7, 0);
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return best && (best->ebx & bit(X86_FEATURE_FSGSBASE));
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}
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static inline bool guest_cpuid_has_pku(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 7, 0);
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return best && (best->ecx & bit(X86_FEATURE_PKU));
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}
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static inline bool guest_cpuid_has_longmode(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
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return best && (best->edx & bit(X86_FEATURE_LM));
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}
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static inline bool guest_cpuid_has_osvw(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
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return best && (best->ecx & bit(X86_FEATURE_OSVW));
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}
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static inline bool guest_cpuid_has_pcid(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 1, 0);
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return best && (best->ecx & bit(X86_FEATURE_PCID));
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}
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static inline bool guest_cpuid_has_x2apic(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 1, 0);
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return best && (best->ecx & bit(X86_FEATURE_X2APIC));
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return *reg & bit(x86_feature);
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}
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static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
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@ -128,46 +112,6 @@ static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
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return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
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}
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static inline bool guest_cpuid_has_gbpages(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
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return best && (best->edx & bit(X86_FEATURE_GBPAGES));
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}
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static inline bool guest_cpuid_has_rtm(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 7, 0);
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return best && (best->ebx & bit(X86_FEATURE_RTM));
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}
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static inline bool guest_cpuid_has_mpx(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 7, 0);
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return best && (best->ebx & bit(X86_FEATURE_MPX));
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}
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static inline bool guest_cpuid_has_rdtscp(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
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return best && (best->edx & bit(X86_FEATURE_RDTSCP));
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}
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static inline bool guest_cpuid_has_nrips(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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best = kvm_find_cpuid_entry(vcpu, 0x8000000a, 0);
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return best && (best->edx & bit(X86_FEATURE_NRIPS));
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}
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static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best;
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@ -4052,7 +4052,8 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu,
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{
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__reset_rsvds_bits_mask(vcpu, &context->guest_rsvd_check,
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cpuid_maxphyaddr(vcpu), context->root_level,
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context->nx, guest_cpuid_has_gbpages(vcpu),
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context->nx,
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guest_cpuid_has(vcpu, X86_FEATURE_GBPAGES),
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is_pse(vcpu), guest_cpuid_is_amd(vcpu));
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}
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@ -4114,8 +4115,8 @@ reset_shadow_zero_bits_mask(struct kvm_vcpu *vcpu, struct kvm_mmu *context)
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__reset_rsvds_bits_mask(vcpu, &context->shadow_zero_check,
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boot_cpu_data.x86_phys_bits,
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context->shadow_root_level, uses_nx,
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guest_cpuid_has_gbpages(vcpu), is_pse(vcpu),
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true);
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guest_cpuid_has(vcpu, X86_FEATURE_GBPAGES),
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is_pse(vcpu), true);
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}
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EXPORT_SYMBOL_GPL(reset_shadow_zero_bits_mask);
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@ -130,7 +130,7 @@ static u8 mtrr_disabled_type(struct kvm_vcpu *vcpu)
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* enable MTRRs and it is obviously undesirable to run the
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* guest entirely with UC memory and we use WB.
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*/
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if (guest_cpuid_has_mtrr(vcpu))
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if (guest_cpuid_has(vcpu, X86_FEATURE_MTRR))
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return MTRR_TYPE_UNCACHABLE;
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else
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return MTRR_TYPE_WRBACK;
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@ -5078,7 +5078,7 @@ static void svm_cpuid_update(struct kvm_vcpu *vcpu)
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struct kvm_cpuid_entry2 *entry;
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/* Update nrips enabled cache */
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svm->nrips_enabled = !!guest_cpuid_has_nrips(&svm->vcpu);
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svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
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if (!kvm_vcpu_apicv_active(vcpu))
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return;
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@ -2611,7 +2611,7 @@ static void setup_msrs(struct vcpu_vmx *vmx)
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if (index >= 0)
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move_msr_up(vmx, index, save_nmsrs++);
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index = __find_msr_index(vmx, MSR_TSC_AUX);
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if (index >= 0 && guest_cpuid_has_rdtscp(&vmx->vcpu))
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if (index >= 0 && guest_cpuid_has(&vmx->vcpu, X86_FEATURE_RDTSCP))
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move_msr_up(vmx, index, save_nmsrs++);
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/*
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* MSR_STAR is only needed on long mode guests, and only
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@ -2671,12 +2671,6 @@ static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
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}
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}
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static bool guest_cpuid_has_vmx(struct kvm_vcpu *vcpu)
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{
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struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 1, 0);
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return best && (best->ecx & (1 << (X86_FEATURE_VMX & 31)));
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}
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/*
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* nested_vmx_allowed() checks whether a guest should be allowed to use VMX
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* instructions and MSRs (i.e., nested VMX). Nested VMX is disabled for
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@ -2685,7 +2679,7 @@ static bool guest_cpuid_has_vmx(struct kvm_vcpu *vcpu)
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*/
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static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu)
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{
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return nested && guest_cpuid_has_vmx(vcpu);
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return nested && guest_cpuid_has(vcpu, X86_FEATURE_VMX);
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}
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/*
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@ -3281,7 +3275,8 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
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break;
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case MSR_IA32_BNDCFGS:
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if (!kvm_mpx_supported() ||
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(!msr_info->host_initiated && !guest_cpuid_has_mpx(vcpu)))
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(!msr_info->host_initiated &&
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!guest_cpuid_has(vcpu, X86_FEATURE_MPX)))
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return 1;
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msr_info->data = vmcs_read64(GUEST_BNDCFGS);
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break;
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@ -3305,7 +3300,8 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
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msr_info->data = vcpu->arch.ia32_xss;
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break;
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case MSR_TSC_AUX:
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if (!guest_cpuid_has_rdtscp(vcpu) && !msr_info->host_initiated)
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if (!msr_info->host_initiated &&
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!guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP))
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return 1;
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/* Otherwise falls through */
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default:
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@ -3364,7 +3360,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
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break;
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case MSR_IA32_BNDCFGS:
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if (!kvm_mpx_supported() ||
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(!msr_info->host_initiated && !guest_cpuid_has_mpx(vcpu)))
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(!msr_info->host_initiated &&
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!guest_cpuid_has(vcpu, X86_FEATURE_MPX)))
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return 1;
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if (is_noncanonical_address(data & PAGE_MASK) ||
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(data & MSR_IA32_BNDCFGS_RSVD))
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@ -3427,7 +3424,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
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clear_atomic_switch_msr(vmx, MSR_IA32_XSS);
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break;
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case MSR_TSC_AUX:
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if (!guest_cpuid_has_rdtscp(vcpu) && !msr_info->host_initiated)
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if (!msr_info->host_initiated &&
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!guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP))
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return 1;
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/* Check reserved bit, higher 32 bits should be zero */
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if ((data >> 32) != 0)
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@ -9622,7 +9620,7 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
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u32 secondary_exec_ctl = vmx_secondary_exec_control(vmx);
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if (vmx_rdtscp_supported()) {
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bool rdtscp_enabled = guest_cpuid_has_rdtscp(vcpu);
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bool rdtscp_enabled = guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP);
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if (!rdtscp_enabled)
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secondary_exec_ctl &= ~SECONDARY_EXEC_RDTSCP;
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@ -9641,7 +9639,7 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
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struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 0x7, 0);
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bool invpcid_enabled =
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best && best->ebx & bit(X86_FEATURE_INVPCID) &&
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guest_cpuid_has_pcid(vcpu);
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guest_cpuid_has(vcpu, X86_FEATURE_PCID);
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if (!invpcid_enabled) {
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secondary_exec_ctl &= ~SECONDARY_EXEC_ENABLE_INVPCID;
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@ -310,8 +310,8 @@ int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
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(MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE);
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u64 new_state = msr_info->data &
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(MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE);
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u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) |
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0x2ff | (guest_cpuid_has_x2apic(vcpu) ? 0 : X2APIC_ENABLE);
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u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | 0x2ff |
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(guest_cpuid_has(vcpu, X86_FEATURE_X2APIC) ? 0 : X2APIC_ENABLE);
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if (!msr_info->host_initiated &&
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((msr_info->data & reserved_bits) != 0 ||
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@ -754,19 +754,19 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
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if (cr4 & CR4_RESERVED_BITS)
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return 1;
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if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE))
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if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && (cr4 & X86_CR4_OSXSAVE))
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return 1;
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if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP))
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if (!guest_cpuid_has(vcpu, X86_FEATURE_SMEP) && (cr4 & X86_CR4_SMEP))
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return 1;
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if (!guest_cpuid_has_smap(vcpu) && (cr4 & X86_CR4_SMAP))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_SMAP) && (cr4 & X86_CR4_SMAP))
|
||||
return 1;
|
||||
|
||||
if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_FSGSBASE))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_FSGSBASE) && (cr4 & X86_CR4_FSGSBASE))
|
||||
return 1;
|
||||
|
||||
if (!guest_cpuid_has_pku(vcpu) && (cr4 & X86_CR4_PKE))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_PKU) && (cr4 & X86_CR4_PKE))
|
||||
return 1;
|
||||
|
||||
if (is_long_mode(vcpu)) {
|
||||
@ -779,7 +779,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
|
||||
return 1;
|
||||
|
||||
if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) {
|
||||
if (!guest_cpuid_has_pcid(vcpu))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_PCID))
|
||||
return 1;
|
||||
|
||||
/* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */
|
||||
@ -883,7 +883,7 @@ static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
u64 fixed = DR6_FIXED_1;
|
||||
|
||||
if (!guest_cpuid_has_rtm(vcpu))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_RTM))
|
||||
fixed |= DR6_RTM;
|
||||
return fixed;
|
||||
}
|
||||
@ -1534,8 +1534,9 @@ void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr)
|
||||
vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec;
|
||||
vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write;
|
||||
|
||||
if (guest_cpuid_has_tsc_adjust(vcpu) && !msr->host_initiated)
|
||||
if (!msr->host_initiated && guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST))
|
||||
update_ia32_tsc_adjust_msr(vcpu, offset);
|
||||
|
||||
kvm_vcpu_write_tsc_offset(vcpu, offset);
|
||||
raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags);
|
||||
|
||||
@ -2185,7 +2186,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
|
||||
kvm_set_lapic_tscdeadline_msr(vcpu, data);
|
||||
break;
|
||||
case MSR_IA32_TSC_ADJUST:
|
||||
if (guest_cpuid_has_tsc_adjust(vcpu)) {
|
||||
if (guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) {
|
||||
if (!msr_info->host_initiated) {
|
||||
s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr;
|
||||
adjust_tsc_offset_guest(vcpu, adj);
|
||||
@ -2307,12 +2308,12 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
|
||||
vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data 0x%llx\n", msr, data);
|
||||
break;
|
||||
case MSR_AMD64_OSVW_ID_LENGTH:
|
||||
if (!guest_cpuid_has_osvw(vcpu))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW))
|
||||
return 1;
|
||||
vcpu->arch.osvw.length = data;
|
||||
break;
|
||||
case MSR_AMD64_OSVW_STATUS:
|
||||
if (!guest_cpuid_has_osvw(vcpu))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW))
|
||||
return 1;
|
||||
vcpu->arch.osvw.status = data;
|
||||
break;
|
||||
@ -2537,12 +2538,12 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
|
||||
msr_info->data = 0xbe702111;
|
||||
break;
|
||||
case MSR_AMD64_OSVW_ID_LENGTH:
|
||||
if (!guest_cpuid_has_osvw(vcpu))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW))
|
||||
return 1;
|
||||
msr_info->data = vcpu->arch.osvw.length;
|
||||
break;
|
||||
case MSR_AMD64_OSVW_STATUS:
|
||||
if (!guest_cpuid_has_osvw(vcpu))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW))
|
||||
return 1;
|
||||
msr_info->data = vcpu->arch.osvw.status;
|
||||
break;
|
||||
@ -6606,7 +6607,7 @@ static void enter_smm(struct kvm_vcpu *vcpu)
|
||||
trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true);
|
||||
vcpu->arch.hflags |= HF_SMM_MASK;
|
||||
memset(buf, 0, 512);
|
||||
if (guest_cpuid_has_longmode(vcpu))
|
||||
if (guest_cpuid_has(vcpu, X86_FEATURE_LM))
|
||||
enter_smm_save_state_64(vcpu, buf);
|
||||
else
|
||||
enter_smm_save_state_32(vcpu, buf);
|
||||
@ -6658,7 +6659,7 @@ static void enter_smm(struct kvm_vcpu *vcpu)
|
||||
kvm_set_segment(vcpu, &ds, VCPU_SREG_GS);
|
||||
kvm_set_segment(vcpu, &ds, VCPU_SREG_SS);
|
||||
|
||||
if (guest_cpuid_has_longmode(vcpu))
|
||||
if (guest_cpuid_has(vcpu, X86_FEATURE_LM))
|
||||
kvm_x86_ops->set_efer(vcpu, 0);
|
||||
|
||||
kvm_update_cpuid(vcpu);
|
||||
@ -7424,7 +7425,8 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
|
||||
int pending_vec, max_bits, idx;
|
||||
struct desc_ptr dt;
|
||||
|
||||
if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE))
|
||||
if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) &&
|
||||
(sregs->cr4 & X86_CR4_OSXSAVE))
|
||||
return -EINVAL;
|
||||
|
||||
dt.size = sregs->idt.limit;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user