KVM: SVM: Emulate next_rip svm feature

This patch implements the emulations of the svm next_rip
feature in the nested svm implementation in kvm.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 09704a0..116e034 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1918,6 +1918,7 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
        nested_vmcb->control.exit_info_2       = vmcb->control.exit_info_2;
        nested_vmcb->control.exit_int_info     = vmcb->control.exit_int_info;
        nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
+       nested_vmcb->control.next_rip          = vmcb->control.next_rip;
 
        /*
         * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
@@ -3360,7 +3361,12 @@ static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
                entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
                                   ASID emulation to nested SVM */
                entry->ecx = 0; /* Reserved */
-               entry->edx = 0; /* Do not support any additional features */
+               entry->edx = 0; /* Per default do not support any
+                                  additional features */
+
+               /* Support next_rip if host supports it */
+               if (svm_has(SVM_FEATURE_NRIP))
+                       entry->edx |= SVM_FEATURE_NRIP;
 
                break;
        }