KVM: Advertise synchronized mmu support to userspace

Signed-off-by: N Avi Kivity <avi@qumranet.com>

KVM: Advertise synchronized mmu support to userspace
Signed-off-by: N Avi Kivity <avi@qumranet.com>
ed848624 · Avi Kivity · e930bffe · ed848624 · ed848624
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arch/x86/kvm/x86.c arch/x86/kvm/x86.c +1 -0

include/linux/kvm.h include/linux/kvm.h +1 -0

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--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -883,6 +883,7 @@ int kvm_dev_ioctl_check_extension(long ext)
 	case KVM_CAP_PIT:
 	case KVM_CAP_NOP_IO_DELAY:
 	case KVM_CAP_MP_STATE:
+	case KVM_CAP_SYNC_MMU:
 		r = 1;
 		break;
 	case KVM_CAP_COALESCED_MMIO:

--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -371,6 +371,7 @@ struct kvm_trace_rec {
 #define KVM_CAP_PV_MMU 13
 #define KVM_CAP_MP_STATE 14
 #define KVM_CAP_COALESCED_MMIO 15
+#define KVM_CAP_SYNC_MMU 16  /* Changes to host mmap are reflected in guest */
 /*
 * ioctls for VM fds