[PATCH] KVM: nSVM: Rename nested_svm_vmloadsave() to svm_copy_vmloadsave_state()

[PATCH] KVM: nSVM: Rename nested_svm_vmloadsave() to svm_copy_vmloadsave_state()

[Vitaly Kuznetsov]

To match svm_copy_vmrun_state(), rename nested_svm_vmloadsave() to
svm_copy_vmloadsave_state().

Opportunistically add missing braces to 'else' branch in
vmload_vmsave_interception().

No functional change intended.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/kvm/svm/nested.c | 2 +-
 arch/x86/kvm/svm/svm.c    | 7 ++++---
 arch/x86/kvm/svm/svm.h    | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 3bd09c50c98b..8493592b63b4 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -722,7 +722,7 @@ void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
 	to_save->cpl = 0;
 }
 
-void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
+void svm_copy_vmloadsave_state(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
 {
 	to_vmcb->save.fs = from_vmcb->save.fs;
 	to_vmcb->save.gs = from_vmcb->save.gs;
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 664d20f0689c..cfe165d74093 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2147,11 +2147,12 @@ static int vmload_vmsave_interception(struct kvm_vcpu *vcpu, bool vmload)
 	ret = kvm_skip_emulated_instruction(vcpu);
 
 	if (vmload) {
-		nested_svm_vmloadsave(vmcb12, svm->vmcb);
+		svm_copy_vmloadsave_state(vmcb12, svm->vmcb);
 		svm->sysenter_eip_hi = 0;
 		svm->sysenter_esp_hi = 0;
-	} else
-		nested_svm_vmloadsave(svm->vmcb, vmcb12);
+	} else {
+		svm_copy_vmloadsave_state(svm->vmcb, vmcb12);
+	}
 
 	kvm_vcpu_unmap(vcpu, &map, true);
 
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 7e2090752d8f..1b65ee3a9569 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -466,7 +466,7 @@ int svm_allocate_nested(struct vcpu_svm *svm);
 int nested_svm_vmrun(struct kvm_vcpu *vcpu);
 void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
 			  struct vmcb_save_area *to_save);
-void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb);
+void svm_copy_vmloadsave_state(struct vmcb *from_vmcb, struct vmcb *to_vmcb);
 int nested_svm_vmexit(struct vcpu_svm *svm);
 
 static inline int nested_svm_simple_vmexit(struct vcpu_svm *svm, u32 exit_code)
-- 
2.31.1

Re: [PATCH] KVM: nSVM: Rename nested_svm_vmloadsave() to svm_copy_vmloadsave_state()

[Sean Christopherson]

On Fri, Jul 16, 2021, Vitaly Kuznetsov wrote:
> diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
> index 3bd09c50c98b..8493592b63b4 100644
> --- a/arch/x86/kvm/svm/nested.c
> +++ b/arch/x86/kvm/svm/nested.c
> @@ -722,7 +722,7 @@ void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
>  	to_save->cpl = 0;
>  }
>  
> -void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
> +void svm_copy_vmloadsave_state(struct vmcb *from_vmcb, struct vmcb *to_vmcb)

And swap the parameter order for both functions in a follow-up patch?  I.e. have
the destination first to match memcpy().

Re: [PATCH] KVM: nSVM: Rename nested_svm_vmloadsave() to svm_copy_vmloadsave_state()

[Paolo Bonzini]

On 16/07/21 19:01, Sean Christopherson wrote:
> On Fri, Jul 16, 2021, Vitaly Kuznetsov wrote:
>> diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
>> index 3bd09c50c98b..8493592b63b4 100644
>> --- a/arch/x86/kvm/svm/nested.c
>> +++ b/arch/x86/kvm/svm/nested.c
>> @@ -722,7 +722,7 @@ void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
>>   	to_save->cpl = 0;
>>   }
>>   
>> -void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
>> +void svm_copy_vmloadsave_state(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
> 
> And swap the parameter order for both functions in a follow-up patch?  I.e. have
> the destination first to match memcpy().
> 

Queued, thanks.

Paolo

[PATCH 2/1] KVM: nSVM: Swap the parameter order for svm_copy_vmrun_state()/svm_copy_vmloadsave_state()

[Vitaly Kuznetsov]

Make svm_copy_vmrun_state()/svm_copy_vmloadsave_state() interface match
'memcpy(dest, src)' to avoid any confusion.

No functional change intended.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/kvm/svm/nested.c |  8 ++++----
 arch/x86/kvm/svm/svm.c    | 12 ++++++------
 arch/x86/kvm/svm/svm.h    |  6 +++---
 3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 8493592b63b4..1c2a0414a88d 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -702,8 +702,8 @@ int nested_svm_vmrun(struct kvm_vcpu *vcpu)
 }
 
 /* Copy state save area fields which are handled by VMRUN */
-void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
-			  struct vmcb_save_area *to_save)
+void svm_copy_vmrun_state(struct vmcb_save_area *to_save,
+			  struct vmcb_save_area *from_save)
 {
 	to_save->es = from_save->es;
 	to_save->cs = from_save->cs;
@@ -722,7 +722,7 @@ void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
 	to_save->cpl = 0;
 }
 
-void svm_copy_vmloadsave_state(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
+void svm_copy_vmloadsave_state(struct vmcb *to_vmcb, struct vmcb *from_vmcb)
 {
 	to_vmcb->save.fs = from_vmcb->save.fs;
 	to_vmcb->save.gs = from_vmcb->save.gs;
@@ -1385,7 +1385,7 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
 
 	svm->nested.vmcb12_gpa = kvm_state->hdr.svm.vmcb_pa;
 
-	svm_copy_vmrun_state(save, &svm->vmcb01.ptr->save);
+	svm_copy_vmrun_state(&svm->vmcb01.ptr->save, save);
 	nested_load_control_from_vmcb12(svm, ctl);
 
 	svm_switch_vmcb(svm, &svm->nested.vmcb02);
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index cfe165d74093..9a6987549e1b 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2147,11 +2147,11 @@ static int vmload_vmsave_interception(struct kvm_vcpu *vcpu, bool vmload)
 	ret = kvm_skip_emulated_instruction(vcpu);
 
 	if (vmload) {
-		svm_copy_vmloadsave_state(vmcb12, svm->vmcb);
+		svm_copy_vmloadsave_state(svm->vmcb, vmcb12);
 		svm->sysenter_eip_hi = 0;
 		svm->sysenter_esp_hi = 0;
 	} else {
-		svm_copy_vmloadsave_state(svm->vmcb, vmcb12);
+		svm_copy_vmloadsave_state(vmcb12, svm->vmcb);
 	}
 
 	kvm_vcpu_unmap(vcpu, &map, true);
@@ -4345,8 +4345,8 @@ static int svm_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
 
 		BUILD_BUG_ON(offsetof(struct vmcb, save) != 0x400);
 
-		svm_copy_vmrun_state(&svm->vmcb01.ptr->save,
-				     map_save.hva + 0x400);
+		svm_copy_vmrun_state(map_save.hva + 0x400,
+				     &svm->vmcb01.ptr->save);
 
 		kvm_vcpu_unmap(vcpu, &map_save, true);
 	}
@@ -4394,8 +4394,8 @@ static int svm_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
 					 &map_save) == -EINVAL)
 				return 1;
 
-			svm_copy_vmrun_state(map_save.hva + 0x400,
-					     &svm->vmcb01.ptr->save);
+			svm_copy_vmrun_state(&svm->vmcb01.ptr->save,
+					     map_save.hva + 0x400);
 
 			kvm_vcpu_unmap(vcpu, &map_save, true);
 		}
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 1b65ee3a9569..bd0fe94c2920 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -464,9 +464,9 @@ void svm_leave_nested(struct vcpu_svm *svm);
 void svm_free_nested(struct vcpu_svm *svm);
 int svm_allocate_nested(struct vcpu_svm *svm);
 int nested_svm_vmrun(struct kvm_vcpu *vcpu);
-void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
-			  struct vmcb_save_area *to_save);
-void svm_copy_vmloadsave_state(struct vmcb *from_vmcb, struct vmcb *to_vmcb);
+void svm_copy_vmrun_state(struct vmcb_save_area *to_save,
+			  struct vmcb_save_area *from_save);
+void svm_copy_vmloadsave_state(struct vmcb *to_vmcb, struct vmcb *from_vmcb);
 int nested_svm_vmexit(struct vcpu_svm *svm);
 
 static inline int nested_svm_simple_vmexit(struct vcpu_svm *svm, u32 exit_code)
-- 
2.31.1