Commit 12a985ae authored by Sean Christopherson's avatar Sean Christopherson
Browse files

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



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: default avatarSean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220614200707.3315957-42-seanjc@google.com
parent 090cd45b

tools/testing/selftests/kvm/lib/x86_64/processor.c

+2 −8
Original line number Diff line number Diff line
@@ -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]);

}