Re: [Xen-devel] [PATCH v19 01/14] x86/VPMU: VPMU should not exist when vpmu_initialise() is called

[Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>]

Am Dienstag 17 MÃrz 2015, 10:53:58 schrieb Boris Ostrovsky:
> We don't need to try to destroy it since it can't be already allocated at the
> time we try to initialize it.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Seems to be already commited.

Dietmar.


> ---
> 
> Changes in v19:
> * Removed unnecesary test for VPMU_CONTEXT_ALLOCATED in svm/vpmu.c
> 
>  xen/arch/x86/hvm/svm/vpmu.c | 3 ---
>  xen/arch/x86/hvm/vpmu.c     | 5 +----
>  2 files changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
> index 64dc167..6764070 100644
> --- a/xen/arch/x86/hvm/svm/vpmu.c
> +++ b/xen/arch/x86/hvm/svm/vpmu.c
> @@ -359,9 +359,6 @@ static int amd_vpmu_initialise(struct vcpu *v)
>      struct vpmu_struct *vpmu = vcpu_vpmu(v);
>      uint8_t family = current_cpu_data.x86;
>  
> -    if ( vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> -        return 0;
> -
>      if ( counters == NULL )
>      {
>           switch ( family )
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index 0e6b6c0..c3273ee 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -236,10 +236,7 @@ void vpmu_initialise(struct vcpu *v)
>      if ( is_pvh_vcpu(v) )
>          return;
>  
> -    if ( vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> -        vpmu_destroy(v);
> -    vpmu_clear(vpmu);
> -    vpmu->context = NULL;
> +    ASSERT(!vpmu->flags && !vpmu->context);
>  
>      switch ( vendor )
>      {
> 

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