[kvm-unit-tests PATCH v2 3/3] x86: Skip perf related tests when pmu is disabled

[Yang Weijiang <weijiang.yang@intel.com>]

When pmu is disabled in KVM, reading MSR_CORE_PERF_GLOBAL_CTRL
or executing rdpmc leads to #GP, so skip related tests in this case.

Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
---
 x86/vmx_tests.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index 4d581e7..dd6fc13 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -944,6 +944,16 @@ static void insn_intercept_main(void)
 			continue;
 		}
 
+		if (insn_table[cur_insn].flag == CPU_RDPMC) {
+			struct cpuid id = cpuid(10);
+
+			if (!(id.a & 0xff)) {
+				printf("\tFeature required for %s is not supported.\n",
+				       insn_table[cur_insn].name);
+				continue;
+			}
+		}
+
 		if (insn_table[cur_insn].disabled) {
 			printf("\tFeature required for %s is not supported.\n",
 			       insn_table[cur_insn].name);
@@ -7490,6 +7500,13 @@ static void test_perf_global_ctrl(u32 nr, const char *name, u32 ctrl_nr,
 
 static void test_load_host_perf_global_ctrl(void)
 {
+	struct cpuid id = cpuid(10);
+
+	if (!(id.a & 0xff)) {
+		report_skip("test_load_host_perf_global_ctrl");
+		return;
+	}
+
 	if (!(ctrl_exit_rev.clr & EXI_LOAD_PERF)) {
 		printf("\"load IA32_PERF_GLOBAL_CTRL\" exit control not supported\n");
 		return;
@@ -7502,6 +7519,13 @@ static void test_load_host_perf_global_ctrl(void)
 
 static void test_load_guest_perf_global_ctrl(void)
 {
+	struct cpuid id = cpuid(10);
+
+	if (!(id.a & 0xff)) {
+		report_skip("test_load_guest_perf_global_ctrl");
+		return;
+	}
+
 	if (!(ctrl_enter_rev.clr & ENT_LOAD_PERF)) {
 		printf("\"load IA32_PERF_GLOBAL_CTRL\" entry control not supported\n");
 		return;
-- 
2.31.1