linux-kernel - [PATCH v2 09/42] KVM: selftests: Use kvm_cpu

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Message-Id: <20220614200707.3315957-10-seanjc@google.com>
Date:   Tue, 14 Jun 2022 20:06:34 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>
Subject: [PATCH v2 09/42] KVM: selftests: Use kvm_cpu_has() for XSAVES in XSS
 MSR test

Use kvm_cpu_has() in the XSS MSR test instead of open coding equivalent
functionality using kvm_get_supported_cpuid_index().

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 tools/testing/selftests/kvm/include/x86_64/processor.h | 1 +
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c      | 8 +-------
 2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 9fe2a9534686..2100eb08916a 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -110,6 +110,7 @@ struct kvm_x86_cpu_feature {
 #define	X86_FEATURE_SPEC_CTRL		KVM_X86_CPU_FEATURE(0x7, 0, EDX, 26)
 #define	X86_FEATURE_ARCH_CAPABILITIES	KVM_X86_CPU_FEATURE(0x7, 0, EDX, 29)
 #define	X86_FEATURE_PKS			KVM_X86_CPU_FEATURE(0x7, 0, ECX, 31)
+#define	X86_FEATURE_XSAVES		KVM_X86_CPU_FEATURE(0xD, 1, EAX, 3)
 
 /*
  * Extended Leafs, a.k.a. AMD defined
diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
index 4e2e08059b95..e0ddf47362e7 100644
--- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
@@ -14,11 +14,8 @@
 
 #define MSR_BITS      64
 
-#define X86_FEATURE_XSAVES	(1<<3)
-
 int main(int argc, char *argv[])
 {
-	struct kvm_cpuid_entry2 *entry;
 	bool xss_in_msr_list;
 	struct kvm_vm *vm;
 	struct kvm_vcpu *vcpu;
@@ -28,10 +25,7 @@ int main(int argc, char *argv[])
 	/* Create VM */
 	vm = vm_create_with_one_vcpu(&vcpu, NULL);
 
-	TEST_REQUIRE(kvm_get_cpuid_max_basic() >= 0xd);
-
-	entry = kvm_get_supported_cpuid_index(0xd, 1);
-	TEST_REQUIRE(entry->eax & X86_FEATURE_XSAVES);
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_XSAVES));
 
 	xss_val = vcpu_get_msr(vcpu, MSR_IA32_XSS);
 	TEST_ASSERT(xss_val == 0,
-- 
2.36.1.476.g0c4daa206d-goog