KVM: Add hypercall host support for svm

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

1 files changed, 15 insertions, 1 deletions

diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index f6e86528f031..aaa6742089e5 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -1076,6 +1076,20 @@ static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         return 0;
 }
 
+static int vmmcall_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+        printk(KERN_DEBUG "got vmmcall at RIP %08llx\n",
+               vcpu->svm->vmcb->save.rip);
+        printk(KERN_DEBUG "vmmcall params: %08llx, %08lx, %08lx, %08lx\n",
+               vcpu->svm->vmcb->save.rax,
+               vcpu->regs[VCPU_REGS_RCX],
+               vcpu->regs[VCPU_REGS_RDX],
+               vcpu->regs[VCPU_REGS_RBP]);
+        vcpu->svm->vmcb->save.rax = 0;
+        vcpu->svm->vmcb->save.rip += 3;
+        return 1;
+}
+
 static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
         inject_ud(vcpu);
@@ -1276,7 +1290,7 @@ static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
         [SVM_EXIT_TASK_SWITCH]                  = task_switch_interception,
         [SVM_EXIT_SHUTDOWN]                     = shutdown_interception,
         [SVM_EXIT_VMRUN]                        = invalid_op_interception,
-        [SVM_EXIT_VMMCALL]                      = invalid_op_interception,
+        [SVM_EXIT_VMMCALL]                      = vmmcall_interception,
         [SVM_EXIT_VMLOAD]                       = invalid_op_interception,
         [SVM_EXIT_VMSAVE]                       = invalid_op_interception,
         [SVM_EXIT_STGI]                         = invalid_op_interception,