[kvm-unit-tests PATCH 12/16] x86/sev: Skip the AMD SEV test if SEV is unsupported/disabled

[Sean Christopherson]

Skip the AMD SEV test if SEV is unsupported, as KVM-Unit-Tests typically
don't report failures if feature is missing.

Opportunistically use amd_sev_enabled() instead of duplicating all of its
functionality.

Signed-off-by: Sean Christopherson <seanjc at google.com>
---
 x86/amd_sev.c | 51 +++++++--------------------------------------------
 1 file changed, 7 insertions(+), 44 deletions(-)

diff --git a/x86/amd_sev.c b/x86/amd_sev.c
index 7757d4f8..4ec45543 100644
--- a/x86/amd_sev.c
+++ b/x86/amd_sev.c
@@ -15,51 +15,10 @@
 #include "x86/amd_sev.h"
 #include "msr.h"
 
-#define EXIT_SUCCESS 0
-#define EXIT_FAILURE 1
-
 #define TESTDEV_IO_PORT 0xe0
 
 static char st1[] = "abcdefghijklmnop";
 
-static int test_sev_activation(void)
-{
-	struct cpuid cpuid_out;
-	u64 msr_out;
-
-	printf("SEV activation test is loaded.\n");
-
-	/* Tests if CPUID function to check SEV is implemented */
-	cpuid_out = cpuid(CPUID_FN_LARGEST_EXT_FUNC_NUM);
-	printf("CPUID Fn8000_0000[EAX]: 0x%08x\n", cpuid_out.a);
-	if (cpuid_out.a < CPUID_FN_ENCRYPT_MEM_CAPAB) {
-		printf("CPUID does not support FN%08x\n",
-		       CPUID_FN_ENCRYPT_MEM_CAPAB);
-		return EXIT_FAILURE;
-	}
-
-	/* Tests if SEV is supported */
-	cpuid_out = cpuid(CPUID_FN_ENCRYPT_MEM_CAPAB);
-	printf("CPUID Fn8000_001F[EAX]: 0x%08x\n", cpuid_out.a);
-	printf("CPUID Fn8000_001F[EBX]: 0x%08x\n", cpuid_out.b);
-	if (!(cpuid_out.a & SEV_SUPPORT_MASK)) {
-		printf("SEV is not supported.\n");
-		return EXIT_FAILURE;
-	}
-	printf("SEV is supported\n");
-
-	/* Tests if SEV is enabled */
-	msr_out = rdmsr(MSR_SEV_STATUS);
-	printf("MSR C001_0131[EAX]: 0x%08lx\n", msr_out & 0xffffffff);
-	if (!(msr_out & SEV_ENABLED_MASK)) {
-		printf("SEV is not enabled.\n");
-		return EXIT_FAILURE;
-	}
-	printf("SEV is enabled\n");
-
-	return EXIT_SUCCESS;
-}
-
 static void test_sev_es_activation(void)
 {
 	if (rdmsr(MSR_SEV_STATUS) & SEV_ES_ENABLED_MASK) {
@@ -88,10 +47,14 @@ static void test_stringio(void)
 
 int main(void)
 {
-	int rtn;
-	rtn = test_sev_activation();
-	report(rtn == EXIT_SUCCESS, "SEV activation test.");
+	if (!amd_sev_enabled()) {
+		report_skip("AMD SEV not enabled\n");
+		goto out;
+	}
+
 	test_sev_es_activation();
 	test_stringio();
+
+out:
 	return report_summary();
 }
-- 
2.49.0.1204.g71687c7c1d-goog