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KVM: selftests: Add back the missing check of MONITOR/MWAIT availability 

The revamp of monitor/mwait test missed the original check of feature
availability [*]. If MONITOR/MWAIT is not supported or is disabled by
IA32_MISC_ENABLE on the host, executing MONITOR or MWAIT instruction
from guest doesn't cause monitor/mwait VM exits, but a #UD.

[*] https://lore.kernel.org/all/20240411210237.34646-1-zide.chen@intel.com/

Reported-by: Xuelian Guo <xuelian.guo@intel.com>
Fixes: 80fd663590 ("selftests: kvm: revamp MONITOR/MWAIT tests")
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Link: https://lore.kernel.org/r/20250620062219.342930-1-chenyi.qiang@intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
pull/1293/head
Chenyi Qiang 2025-06-20 14:22:18 +08:00 committed by Sean Christopherson
parent 47bb584237
commit 0048ca5e99
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/kvm/x86/monitor_mwait_test.c
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@ -74,6 +74,7 @@ int main(int argc, char *argv[])
int testcase;
char test[80];
TEST_REQUIRE(this_cpu_has(X86_FEATURE_MWAIT));
TEST_REQUIRE(kvm_has_cap(KVM_CAP_DISABLE_QUIRKS2));
ksft_print_header();