KVM: SVM: clean up nestec vmload/vmsave paths

This patch removes the usage of nested_svm_do from the vmload and
vmsave emulation code paths.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 17 insertions, 19 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index e85d79142ffc..78c0463ccdd4 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -128,8 +128,6 @@ static void svm_complete_interrupts(struct vcpu_svm *svm);
 
 static int nested_svm_exit_handled(struct vcpu_svm *svm, bool kvm_override);
 static int nested_svm_vmexit(struct vcpu_svm *svm);
-static int nested_svm_vmsave(struct vcpu_svm *svm, void *nested_vmcb,
-                             void *arg2, void *opaque);
 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
                                       bool has_error_code, u32 error_code);
 
@@ -1865,7 +1863,7 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1,
         return 0;
 }
 
-static int nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
+static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
 {
         to_vmcb->save.fs = from_vmcb->save.fs;
         to_vmcb->save.gs = from_vmcb->save.gs;
@@ -1879,44 +1877,44 @@ static int nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
         to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
         to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
         to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
-
-        return 1;
-}
-
-static int nested_svm_vmload(struct vcpu_svm *svm, void *nested_vmcb,
-                             void *arg2, void *opaque)
-{
-        return nested_svm_vmloadsave((struct vmcb *)nested_vmcb, svm->vmcb);
-}
-
-static int nested_svm_vmsave(struct vcpu_svm *svm, void *nested_vmcb,
-                             void *arg2, void *opaque)
-{
-        return nested_svm_vmloadsave(svm->vmcb, (struct vmcb *)nested_vmcb);
 }
 
 static int vmload_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 {
+        struct vmcb *nested_vmcb;
+
         if (nested_svm_check_permissions(svm))
                 return 1;
 
         svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
         skip_emulated_instruction(&svm->vcpu);
 
-        nested_svm_do(svm, svm->vmcb->save.rax, 0, NULL, nested_svm_vmload);
+        nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0);
+        if (!nested_vmcb)
+                return 1;
+
+        nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
+        nested_svm_unmap(nested_vmcb, KM_USER0);
 
         return 1;
 }
 
 static int vmsave_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 {
+        struct vmcb *nested_vmcb;
+
         if (nested_svm_check_permissions(svm))
                 return 1;
 
         svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
         skip_emulated_instruction(&svm->vcpu);
 
-        nested_svm_do(svm, svm->vmcb->save.rax, 0, NULL, nested_svm_vmsave);
+        nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0);
+        if (!nested_vmcb)
+                return 1;
+
+        nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
+        nested_svm_unmap(nested_vmcb, KM_USER0);
 
         return 1;
 }