commit 10a65fc45419b7859bb6dd0a7f568eea45cbedb2
author Nadav Amit <namit@vmware.com> Tue Jun 30 02:45:13 2020 -0700
committer Paolo Bonzini <pbonzini@redhat.com> Wed Jul 01 08:10:29 2020 -0400
tree b025dc4a1588c0b4491cfddd0b30d3a9ceaaa915
parent ec4fed57aa932c2ad869f61464af203b0f119d5a

x86: svm: check TSC adjust support

MSR_IA32_TSC_ADJUST may be supported by KVM on AMD machines, but it does
not show on AMD manual. Check CPUID to see if it supported before
running the relevant tests.

Signed-off-by: Nadav Amit <namit@vmware.com>
Message-Id: <20200630094516.22983-3-namit@vmware.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

x86/svm_tests.c

diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index a2c993d..92cefaf 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -893,6 +893,11 @@
 #define TSC_OFFSET_VALUE    (~0ull << 48)
 static bool ok;
 
+static bool tsc_adjust_supported(void)
+{
+    return this_cpu_has(X86_FEATURE_TSC_ADJUST);
+}
+
 static void tsc_adjust_prepare(struct svm_test *test)
 {
     default_prepare(test);
@@ -2010,7 +2015,7 @@
     { "npt_rw_l1mmio", npt_supported, npt_rw_l1mmio_prepare,
       default_prepare_gif_clear, npt_rw_l1mmio_test,
       default_finished, npt_rw_l1mmio_check },
-    { "tsc_adjust", default_supported, tsc_adjust_prepare,
+    { "tsc_adjust", tsc_adjust_supported, tsc_adjust_prepare,
       default_prepare_gif_clear, tsc_adjust_test,
       default_finished, tsc_adjust_check },
     { "latency_run_exit", default_supported, latency_prepare,