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 <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
