Re: [PATCH RFC v3 2/9] KVM: arm/arm64: fix vcpu self-detection in vgic_v3_dispatch_sgi()

[Christoffer Dall]

On Mon, Aug 21, 2017 at 10:35:23PM +0200, Radim Krčmář wrote:
> The index in kvm->vcpus array and vcpu->vcpu_id are very different
> things.  Comparing struct kvm_vcpu pointers is a sure way to know.
> 
> Signed-off-by: Radim Krčmář 

Acked-by: Christoffer Dall 

> ---
>  virt/kvm/arm/vgic/vgic-mmio-v3.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c 
> b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> index 408ef06638fc..9d4b69b766ec 100644
> --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
> +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> @@ -797,7 +797,6 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   u16 target_cpus;
>   u64 mpidr;
>   int sgi, c;
> - int vcpu_id = vcpu->vcpu_id;
>   bool broadcast;
>  
>   sgi = (reg & ICC_SGI1R_SGI_ID_MASK) >> ICC_SGI1R_SGI_ID_SHIFT;
> @@ -821,7 +820,7 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   break;
>  
>   /* Don't signal the calling VCPU */
> - if (broadcast && c == vcpu_id)
> + if (broadcast && c_vcpu == vcpu)
>   continue;
>  
>   if (!broadcast) {
> -- 
> 2.13.3
> 

Re: [PATCH RFC v3 2/9] KVM: arm/arm64: fix vcpu self-detection in vgic_v3_dispatch_sgi()

[Christoffer Dall]

On Mon, Aug 21, 2017 at 10:35:23PM +0200, Radim Krčmář wrote:
> The index in kvm->vcpus array and vcpu->vcpu_id are very different
> things.  Comparing struct kvm_vcpu pointers is a sure way to know.
> 
> Signed-off-by: Radim Krčmář 

Acked-by: Christoffer Dall 

> ---
>  virt/kvm/arm/vgic/vgic-mmio-v3.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c 
> b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> index 408ef06638fc..9d4b69b766ec 100644
> --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
> +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> @@ -797,7 +797,6 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   u16 target_cpus;
>   u64 mpidr;
>   int sgi, c;
> - int vcpu_id = vcpu->vcpu_id;
>   bool broadcast;
>  
>   sgi = (reg & ICC_SGI1R_SGI_ID_MASK) >> ICC_SGI1R_SGI_ID_SHIFT;
> @@ -821,7 +820,7 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   break;
>  
>   /* Don't signal the calling VCPU */
> - if (broadcast && c == vcpu_id)
> + if (broadcast && c_vcpu == vcpu)
>   continue;
>  
>   if (!broadcast) {
> -- 
> 2.13.3
> 

Re: [PATCH RFC v3 2/9] KVM: arm/arm64: fix vcpu self-detection in vgic_v3_dispatch_sgi()

[David Hildenbrand]

On 21.08.2017 22:35, Radim Krčmář wrote:
> The index in kvm->vcpus array and vcpu->vcpu_id are very different
> things.  Comparing struct kvm_vcpu pointers is a sure way to know.
> 
> Signed-off-by: Radim Krčmář 
> ---
>  virt/kvm/arm/vgic/vgic-mmio-v3.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c 
> b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> index 408ef06638fc..9d4b69b766ec 100644
> --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
> +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> @@ -797,7 +797,6 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   u16 target_cpus;
>   u64 mpidr;
>   int sgi, c;
> - int vcpu_id = vcpu->vcpu_id;
>   bool broadcast;
>  
>   sgi = (reg & ICC_SGI1R_SGI_ID_MASK) >> ICC_SGI1R_SGI_ID_SHIFT;
> @@ -821,7 +820,7 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   break;
>  
>   /* Don't signal the calling VCPU */
> - if (broadcast && c == vcpu_id)
> + if (broadcast && c_vcpu == vcpu)
>   continue;
>  
>   if (!broadcast) {
> 

Yes, this looks correct to me.

Reviewed-by: David Hildenbrand 

-- 

Thanks,

David

Re: [PATCH RFC v3 2/9] KVM: arm/arm64: fix vcpu self-detection in vgic_v3_dispatch_sgi()

[David Hildenbrand]

On 21.08.2017 22:35, Radim Krčmář wrote:
> The index in kvm->vcpus array and vcpu->vcpu_id are very different
> things.  Comparing struct kvm_vcpu pointers is a sure way to know.
> 
> Signed-off-by: Radim Krčmář 
> ---
>  virt/kvm/arm/vgic/vgic-mmio-v3.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c 
> b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> index 408ef06638fc..9d4b69b766ec 100644
> --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
> +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> @@ -797,7 +797,6 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   u16 target_cpus;
>   u64 mpidr;
>   int sgi, c;
> - int vcpu_id = vcpu->vcpu_id;
>   bool broadcast;
>  
>   sgi = (reg & ICC_SGI1R_SGI_ID_MASK) >> ICC_SGI1R_SGI_ID_SHIFT;
> @@ -821,7 +820,7 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
>   break;
>  
>   /* Don't signal the calling VCPU */
> - if (broadcast && c == vcpu_id)
> + if (broadcast && c_vcpu == vcpu)
>   continue;
>  
>   if (!broadcast) {
> 

Yes, this looks correct to me.

Reviewed-by: David Hildenbrand 

-- 

Thanks,

David

[PATCH RFC v3 2/9] KVM: arm/arm64: fix vcpu self-detection in vgic_v3_dispatch_sgi()

[Radim Krčmář]

The index in kvm->vcpus array and vcpu->vcpu_id are very different
things.  Comparing struct kvm_vcpu pointers is a sure way to know.

Signed-off-by: Radim Krčmář 
---
 virt/kvm/arm/vgic/vgic-mmio-v3.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index 408ef06638fc..9d4b69b766ec 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -797,7 +797,6 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
u16 target_cpus;
u64 mpidr;
int sgi, c;
-   int vcpu_id = vcpu->vcpu_id;
bool broadcast;
 
sgi = (reg & ICC_SGI1R_SGI_ID_MASK) >> ICC_SGI1R_SGI_ID_SHIFT;
@@ -821,7 +820,7 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
break;
 
/* Don't signal the calling VCPU */
-   if (broadcast && c == vcpu_id)
+   if (broadcast && c_vcpu == vcpu)
continue;
 
if (!broadcast) {
-- 
2.13.3

[PATCH RFC v3 2/9] KVM: arm/arm64: fix vcpu self-detection in vgic_v3_dispatch_sgi()

[Radim Krčmář]

The index in kvm->vcpus array and vcpu->vcpu_id are very different
things.  Comparing struct kvm_vcpu pointers is a sure way to know.

Signed-off-by: Radim Krčmář 
---
 virt/kvm/arm/vgic/vgic-mmio-v3.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index 408ef06638fc..9d4b69b766ec 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -797,7 +797,6 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
u16 target_cpus;
u64 mpidr;
int sgi, c;
-   int vcpu_id = vcpu->vcpu_id;
bool broadcast;
 
sgi = (reg & ICC_SGI1R_SGI_ID_MASK) >> ICC_SGI1R_SGI_ID_SHIFT;
@@ -821,7 +820,7 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
break;
 
/* Don't signal the calling VCPU */
-   if (broadcast && c == vcpu_id)
+   if (broadcast && c_vcpu == vcpu)
continue;
 
if (!broadcast) {
-- 
2.13.3