Messages in this thread Patch in this message | | | From | Jinrong Liang <> | Subject | [PATCH v3 01/11] KVM: selftests: Add vcpu_set_cpuid_property() to set properties | Date | Mon, 14 Aug 2023 19:50:58 +0800 |
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From: Jinrong Liang <cloudliang@tencent.com>
Add vcpu_set_cpuid_property() helper function for setting properties, which simplifies the process of setting CPUID properties for vCPUs.
Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Jinrong Liang <cloudliang@tencent.com> --- .../selftests/kvm/include/x86_64/processor.h | 4 ++++ tools/testing/selftests/kvm/lib/x86_64/processor.c | 14 ++++++++++++++ 2 files changed, 18 insertions(+)
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index 4fd042112526..6b146e1c6736 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -973,6 +973,10 @@ static inline void vcpu_set_cpuid(struct kvm_vcpu *vcpu) void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr); +void vcpu_set_cpuid_property(struct kvm_vcpu *vcpu, + struct kvm_x86_cpu_property property, + uint32_t value); + void vcpu_clear_cpuid_entry(struct kvm_vcpu *vcpu, uint32_t function); void vcpu_set_or_clear_cpuid_feature(struct kvm_vcpu *vcpu, struct kvm_x86_cpu_feature feature, diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index d8288374078e..0e029be66783 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -760,6 +760,20 @@ void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr) vcpu_set_cpuid(vcpu); } +void vcpu_set_cpuid_property(struct kvm_vcpu *vcpu, + struct kvm_x86_cpu_property property, + uint32_t value) +{ + struct kvm_cpuid_entry2 *entry; + + entry = __vcpu_get_cpuid_entry(vcpu, property.function, property.index); + + (&entry->eax)[property.reg] &= ~GENMASK(property.hi_bit, property.lo_bit); + (&entry->eax)[property.reg] |= value << (property.lo_bit); + + 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); -- 2.39.3
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