kvm: better MWAIT emulation for guests

[karo-tx-linux.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 49a69c0a0d50777cd2c9dbb116b71f9334da838c..2f9fe6bf7091609cd667c7ae1517edbf46b3bff9 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2687,6 +2687,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
        case KVM_CAP_ADJUST_CLOCK:
                r = KVM_CLOCK_TSC_STABLE;
                break;
+       case KVM_CAP_X86_GUEST_MWAIT:
+               r = kvm_mwait_in_guest();
+               break;
        case KVM_CAP_X86_SMM:
                /* SMBASE is usually relocated above 1M on modern chipsets,
                 * and SMM handlers might indeed rely on 4G segment limits,