CPUID leaf 0x8000001b (EAX) provides information about Instruction-Based
sampling capabilities on AMD Platforms.
Signed-off-by: Manali Shukla <manali.shukla@xxxxxxx>
---
arch/x86/kvm/cpuid.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 7270d22fbf31..d77184485e26 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -1751,6 +1751,13 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function)
entry->eax = entry->ebx = entry->ecx = 0;
entry->edx = 0; /* reserved */
break;
+ /* AMD IBS capability */
+ case 0x8000001B:
+ if (!kvm_cpu_cap_has(X86_FEATURE_IBS))
+ entry->eax = 0;
+
+ entry->ebx = entry->ecx = entry->edx = 0;
+ break;
case 0x8000001F:
if (!kvm_cpu_cap_has(X86_FEATURE_SEV)) {
entry->eax = entry->ebx = entry->ecx = entry->edx = 0;
--
2.43.0
