diff mbox

KVM: PPC: fix ONE_REG AltiVec support

Message ID 20151216172133.9709.22769.stgit@bahia.huguette.org (mailing list archive)
State New, archived
Headers show

Commit Message

Greg Kurz Dec. 16, 2015, 5:24 p.m. UTC 
The get and set operations got exchanged by mistake when moving the
code from book3s.c to powerpc.c.

Fixes: 3840edc8033ad5b86deee309c1c321ca54257452
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
---

It's been there for over a year but I guess we want that in 4.4, even
if doesn't break the host kernel.

 arch/powerpc/kvm/powerpc.c |   20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)


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Comments

Greg Kurz Jan. 4, 2016, 9:14 a.m. UTC | #1 
Happy new year !

On Wed, 16 Dec 2015 18:24:03 +0100
Greg Kurz <gkurz@linux.vnet.ibm.com> wrote:

> The get and set operations got exchanged by mistake when moving the
> code from book3s.c to powerpc.c.
> 
> Fixes: 3840edc8033ad5b86deee309c1c321ca54257452
> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
> ---
> 

Ping ?

> It's been there for over a year but I guess we want that in 4.4, even
> if doesn't break the host kernel.
> 
>  arch/powerpc/kvm/powerpc.c |   20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
> index 6fd2405c7f4a..a3b182dcb823 100644
> --- a/arch/powerpc/kvm/powerpc.c
> +++ b/arch/powerpc/kvm/powerpc.c
> @@ -919,21 +919,17 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
>  				r = -ENXIO;
>  				break;
>  			}
> -			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
> +			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
>  			break;
>  		case KVM_REG_PPC_VSCR:
>  			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
>  				r = -ENXIO;
>  				break;
>  			}
> -			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
> +			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
>  			break;
>  		case KVM_REG_PPC_VRSAVE:
> -			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
> -				r = -ENXIO;
> -				break;
> -			}
> -			vcpu->arch.vrsave = set_reg_val(reg->id, val);
> +			val = get_reg_val(reg->id, vcpu->arch.vrsave);
>  			break;
>  #endif /* CONFIG_ALTIVEC */
>  		default:
> @@ -974,17 +970,21 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
>  				r = -ENXIO;
>  				break;
>  			}
> -			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
> +			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
>  			break;
>  		case KVM_REG_PPC_VSCR:
>  			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
>  				r = -ENXIO;
>  				break;
>  			}
> -			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
> +			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
>  			break;
>  		case KVM_REG_PPC_VRSAVE:
> -			val = get_reg_val(reg->id, vcpu->arch.vrsave);
> +			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
> +				r = -ENXIO;
> +				break;
> +			}
> +			vcpu->arch.vrsave = set_reg_val(reg->id, val);
>  			break;
>  #endif /* CONFIG_ALTIVEC */
>  		default:
> 
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diff mbox

Patch

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 6fd2405c7f4a..a3b182dcb823 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -919,21 +919,17 @@  int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 				r = -ENXIO;
 				break;
 			}
-			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
+			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
 			break;
 		case KVM_REG_PPC_VSCR:
 			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 				r = -ENXIO;
 				break;
 			}
-			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
+			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
 			break;
 		case KVM_REG_PPC_VRSAVE:
-			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
-				r = -ENXIO;
-				break;
-			}
-			vcpu->arch.vrsave = set_reg_val(reg->id, val);
+			val = get_reg_val(reg->id, vcpu->arch.vrsave);
 			break;
 #endif /* CONFIG_ALTIVEC */
 		default:
@@ -974,17 +970,21 @@  int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 				r = -ENXIO;
 				break;
 			}
-			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
+			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
 			break;
 		case KVM_REG_PPC_VSCR:
 			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 				r = -ENXIO;
 				break;
 			}
-			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
+			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
 			break;
 		case KVM_REG_PPC_VRSAVE:
-			val = get_reg_val(reg->id, vcpu->arch.vrsave);
+			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
+				r = -ENXIO;
+				break;
+			}
+			vcpu->arch.vrsave = set_reg_val(reg->id, val);
 			break;
 #endif /* CONFIG_ALTIVEC */
 		default: