KVM: add MSR based hypercall API

[powerpc.git] / drivers / kvm / svm.c

diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 72cac04..f6e8652 100644 (file)
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -1669,6 +1669,18 @@ static int is_disabled(void)
        return 0;
 }
 
+static void
+svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
+{
+       /*
+        * Patch in the VMMCALL instruction:
+        */
+       hypercall[0] = 0x0f;
+       hypercall[1] = 0x01;
+       hypercall[2] = 0xd9;
+       hypercall[3] = 0xc3;
+}
+
 static struct kvm_arch_ops svm_arch_ops = {
        .cpu_has_kvm_support = has_svm,
        .disabled_by_bios = is_disabled,
@@ -1717,6 +1729,7 @@ static struct kvm_arch_ops svm_arch_ops = {
        .run = svm_vcpu_run,
        .skip_emulated_instruction = skip_emulated_instruction,
        .vcpu_setup = svm_vcpu_setup,
+       .patch_hypercall = svm_patch_hypercall,
 };
 
 static int __init svm_init(void)