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KVM: selftests: Use vcpu_get_cpuid_entry() in PV features test (sort of)

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Add a new helper, vcpu_clear_cpuid_entry(), to do a RMW operation on the
vCPU's CPUID model to clear a given CPUID entry, and use it to clear
KVM's paravirt feature instead of operating on kvm_get_supported_cpuid()'s
static "cpuid" variable.  This also eliminates a user of
the soon-be-defunct set_cpuid() helper.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220614200707.3315957-26-seanjc@google.com
This commit is contained in:
Sean Christopherson
2022-06-14 20:06:50 +00:00
parent b78843be77
commit 3a5d36b32b
3 changed files with 13 additions and 11 deletions
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11
tools/testing/selftests/kvm/lib/x86_64/processor.c
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@@ -770,6 +770,17 @@ void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr)
vcpu_set_cpuid(vcpu);
}
void vcpu_clear_cpuid_entry(struct kvm_vcpu *vcpu, uint32_t function)
{
struct kvm_cpuid_entry2 *entry = vcpu_get_cpuid_entry(vcpu, function);
entry->eax = 0;
entry->ebx = 0;
entry->ecx = 0;
entry->edx = 0;
vcpu_set_cpuid(vcpu);
}
void vcpu_set_or_clear_cpuid_feature(struct kvm_vcpu *vcpu,
struct kvm_x86_cpu_feature feature,
bool set)