KVM: Advertise synchronized mmu support to userspace

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

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c7b01efe0646..0d682fc6aeb3 100644
--- 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:
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 0ea064cbfbc8..69511f74f912 100644
--- 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