KVM: x86: disable paravirt mmu reporting

commit a68a6a7282373bedba8a2ed751b6384edb983a64 upstream

Disable paravirt MMU capability reporting, so that new (or rebooted)
guests switch to native operation.

Paravirt MMU is a burden to maintain and does not bring significant
advantages compared to shadow anymore.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 59647016a0b5adf5c58363f1e7551a25f4812404..0adbed229e253ed2833787cdfc9e1199a34234c1 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1242,8 +1242,8 @@ int kvm_dev_ioctl_check_extension(long ext)
        case KVM_CAP_NR_MEMSLOTS:
                r = KVM_MEMORY_SLOTS;
                break;
-       case KVM_CAP_PV_MMU:
-               r = !tdp_enabled;
+       case KVM_CAP_PV_MMU:    /* obsolete */
+               r = 0;
                break;
        case KVM_CAP_IOMMU:
                r = iommu_found();