From: Jinrong Liang <cloudliang@xxxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Jinrong Liang <cloudliang@xxxxxxxxxxx>
---
.../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
