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| author |   Sean Christopherson <seanjc@google.com> | 2022-06-14 20:06:50 +0000 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2022-07-13 18:14:18 -0700 |
| commit | 3a5d36b32bd26d88d8dfe8f1eff702e138ea18cd (patch) | |
| tree | c99aa050506cb9c4ac9cbfde319a6b52c5617fcb /tools/testing/selftests/kvm/lib | |
| parent | KVM: selftests: Use vcpu_clear_cpuid_feature() in monitor_mwait_test (diff) | |
| download | linux-dev-3a5d36b32bd26d88d8dfe8f1eff702e138ea18cd.tar.xz linux-dev-3a5d36b32bd26d88d8dfe8f1eff702e138ea18cd.zip | |
KVM: selftests: Use vcpu_get_cpuid_entry() in PV features test (sort of)
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
Diffstat (limited to 'tools/testing/selftests/kvm/lib')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 27bf5dad6ec5..a41384863336 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -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) |