KVM: MIPS: Claim KVM_CAP_READONLY_MEM support

Now that load/store faults due to read only memory regions are treated
as MMIO accesses it is safe to claim support for read only memory
regions (KVM_CAP_READONLY_MEM).

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org

2 files changed, 3 insertions, 0 deletions

diff --git a/arch/mips/include/uapi/asm/kvm.h b/arch/mips/include/uapi/asm/kvm.h
index 6985eb59b085..a8a0199bf760 100644
--- a/arch/mips/include/uapi/asm/kvm.h
+++ b/arch/mips/include/uapi/asm/kvm.h
@@ -19,6 +19,8 @@
  * Some parts derived from the x86 version of this file.
  */
 
+#define __KVM_HAVE_READONLY_MEM
+
 /*
  * for KVM_GET_REGS and KVM_SET_REGS
  *
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index 9932f53a1e5c..591426cda15e 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -1217,6 +1217,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
         switch (ext) {
         case KVM_CAP_ONE_REG:
         case KVM_CAP_ENABLE_CAP:
+        case KVM_CAP_READONLY_MEM:
         case KVM_CAP_SYNC_MMU:
                 r = 1;
                 break;