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KVM: selftests: Use the common cpuid() helper in cpu_vendor_string_is()

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Use cpuid() to get CPUID.0x0 in cpu_vendor_string_is(), thus eliminating
the last open coded usage of CPUID (ignoring debug_regs.c, which emits
CPUID from the guest to trigger a VM-Exit and doesn't actually care about
the results of CPUID).

Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220614200707.3315957-42-seanjc@google.com
This commit is contained in:
Sean Christopherson 2022-06-14 20:07:06 +00:00
parent 090cd45b21
commit 12a985aeb4
1 changed files with 2 additions and 8 deletions
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10
tools/testing/selftests/kvm/lib/x86_64/processor.c
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@ -1011,15 +1011,9 @@ void kvm_x86_state_cleanup(struct kvm_x86_state *state)
static bool cpu_vendor_string_is(const char *vendor)
{
const uint32_t *chunk = (const uint32_t *)vendor;
int eax, ebx, ecx, edx;
const int leaf = 0;
__asm__ __volatile__(
"cpuid"
: /* output */ "=a"(eax), "=b"(ebx),
"=c"(ecx), "=d"(edx)
: /* input */ "0"(leaf), "2"(0));
uint32_t eax, ebx, ecx, edx;
cpuid(0, &eax, &ebx, &ecx, &edx);
return (ebx == chunk[0] && edx == chunk[1] && ecx == chunk[2]);
}