[PATCH v1 07/11] KVM: x86: Extend CPUID range to include new leaf

[Manali Shukla <manali.shukla@amd.com>]

CPUID leaf 0x8000001b (EAX) provides information about Instruction-Based
sampling capabilities on AMD Platforms.

Signed-off-by: Manali Shukla <manali.shukla@amd.com>
---
 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