This capability shows userspace that is can trust the values
of cpuid[0x8000000A] that it gets from the kernel. Old
behavior was to just return the host cpuid values which is
broken because all additional svm-features need support in
the svm emulation code.
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
arch/x86/kvm/x86.c | 1 +
include/linux/kvm.h | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 53360de..51bad08 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1557,6 +1557,7 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_PCI_SEGMENT:
case KVM_CAP_DEBUGREGS:
case KVM_CAP_X86_ROBUST_SINGLESTEP:
+ case KVM_CAP_SVM_CPUID_FIXED:
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index ce28767..86caf32 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -507,6 +507,7 @@ struct kvm_ioeventfd {
#define KVM_CAP_DEBUGREGS 50
#endif
#define KVM_CAP_X86_ROBUST_SINGLESTEP 51
+#define KVM_CAP_SVM_CPUID_FIXED 52
#ifdef KVM_CAP_IRQ_ROUTING
--
1.7.0
--
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