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KVM: selftests: Assert that vcpu->cpuid is non-NULL when getting CPUID entries

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Add a sanity check in __vcpu_get_cpuid_entry() to provide a friendlier
error than a segfault when a test developer tries to use a vCPU CPUID
helper on a barebones vCPU.

Link: https://lore.kernel.org/r/20241128013424.4096668-8-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-11-27 17:33:34 -08:00
parent bf4dfc3aa8
commit 08833719e7
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/kvm/include/x86/processor.h
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@ -1014,6 +1014,8 @@ static inline struct kvm_cpuid_entry2 *__vcpu_get_cpuid_entry(struct kvm_vcpu *v
uint32_t function,
uint32_t index)
{
TEST_ASSERT(vcpu->cpuid, "Must do vcpu_init_cpuid() first (or equivalent)");
return (struct kvm_cpuid_entry2 *)get_cpuid_entry(vcpu->cpuid,
function, index);
}