1 files changed, 17 insertions, 1 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 03ba402c476a..63afca1c295f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -832,6 +832,9 @@ 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;
+                break;
         default:
                 r = 0;
                 break;
@@ -2452,9 +2455,19 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 }
 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
 
+static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0,
+                           unsigned long a1)
+{
+        if (is_long_mode(vcpu))
+                return a0;
+        else
+                return a0 | ((gpa_t)a1 << 32);
+}
+
 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
 {
         unsigned long nr, a0, a1, a2, a3, ret;
+        int r = 1;
 
         kvm_x86_ops->cache_regs(vcpu);
 
@@ -2476,6 +2489,9 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
         case KVM_HC_VAPIC_POLL_IRQ:
                 ret = 0;
                 break;
+        case KVM_HC_MMU_OP:
+                r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret);
+                break;
         default:
                 ret = -KVM_ENOSYS;
                 break;
@@ -2483,7 +2499,7 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
         vcpu->arch.regs[VCPU_REGS_RAX] = ret;
         kvm_x86_ops->decache_regs(vcpu);
         ++vcpu->stat.hypercalls;
-        return 0;
+        return r;
 }
 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);