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KVM: selftests: Refactor kvm_cpuid_has() to prep for X86_PROPERTY_* support

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Refactor kvm_cpuid_has() to prepare for extending X86_PROPERTY_* support
to KVM as well as "this CPU".

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20221006005125.680782-6-seanjc@google.com
This commit is contained in:
Sean Christopherson 2022-10-06 00:51:18 +00:00
parent d80ddad2a8
commit a29e6e383b
1 changed files with 13 additions and 6 deletions
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19
tools/testing/selftests/kvm/lib/x86_64/processor.c
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@ -652,8 +652,9 @@ const struct kvm_cpuid2 *kvm_get_supported_cpuid(void)
return cpuid;
}
bool kvm_cpuid_has(const struct kvm_cpuid2 *cpuid,
struct kvm_x86_cpu_feature feature)
static uint32_t __kvm_cpu_has(const struct kvm_cpuid2 *cpuid,
uint32_t function, uint32_t index,
uint8_t reg, uint8_t lo, uint8_t hi)
{
const struct kvm_cpuid_entry2 *entry;
int i;
@ -666,12 +667,18 @@ bool kvm_cpuid_has(const struct kvm_cpuid2 *cpuid,
* order, but kvm_x86_cpu_feature matches that mess, so yay
* pointer shenanigans!
*/
if (entry->function == feature.function &&
entry->index == feature.index)
return (&entry->eax)[feature.reg] & BIT(feature.bit);
if (entry->function == function && entry->index == index)
return ((&entry->eax)[reg] & GENMASK(hi, lo)) >> lo;
}
return false;
return 0;
}
bool kvm_cpuid_has(const struct kvm_cpuid2 *cpuid,
struct kvm_x86_cpu_feature feature)
{
return __kvm_cpu_has(cpuid, feature.function, feature.index,
feature.reg, feature.bit, feature.bit);
}
uint64_t kvm_get_feature_msr(uint64_t msr_index)