Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH] KVM: x86/vPMU: reset pmc->counter to 0 for pmu
 fixed_counters
To:     Like Xu <like.xu@linux.intel.com>
Cc:     wehuang@redhat.com, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20190717025118.16783-1-like.xu@linux.intel.com>
From:   Paolo Bonzini <pbonzini@redhat.com>
Openpgp: preference=signencrypt
Message-ID: <20682ae6-5699-3963-318e-55a177ccd57f@redhat.com>
Date:   Wed, 17 Jul 2019 12:23:27 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
 Thunderbird/60.7.2
MIME-Version: 1.0
In-Reply-To: <20190717025118.16783-1-like.xu@linux.intel.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 17/07/19 04:51, Like Xu wrote:
> To avoid semantic inconsistency, the fixed_counters in Intel vPMU
> need to be reset to 0 in intel_pmu_reset() as gp_counters does.
> 
> Signed-off-by: Like Xu <like.xu@linux.intel.com>
> ---
>  arch/x86/kvm/vmx/pmu_intel.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c
> index 68d231d49c7a..4dea0e0e7e39 100644
> --- a/arch/x86/kvm/vmx/pmu_intel.c
> +++ b/arch/x86/kvm/vmx/pmu_intel.c
> @@ -337,17 +337,22 @@ static void intel_pmu_init(struct kvm_vcpu *vcpu)
>  static void intel_pmu_reset(struct kvm_vcpu *vcpu)
>  {
>  	struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
> +	struct kvm_pmc *pmc = NULL;
>  	int i;
>  
>  	for (i = 0; i < INTEL_PMC_MAX_GENERIC; i++) {
> -		struct kvm_pmc *pmc = &pmu->gp_counters[i];
> +		pmc = &pmu->gp_counters[i];
>  
>  		pmc_stop_counter(pmc);
>  		pmc->counter = pmc->eventsel = 0;
>  	}
>  
> -	for (i = 0; i < INTEL_PMC_MAX_FIXED; i++)
> -		pmc_stop_counter(&pmu->fixed_counters[i]);
> +	for (i = 0; i < INTEL_PMC_MAX_FIXED; i++) {
> +		pmc = &pmu->fixed_counters[i];
> +
> +		pmc_stop_counter(pmc);
> +		pmc->counter = 0;
> +	}
>  
>  	pmu->fixed_ctr_ctrl = pmu->global_ctrl = pmu->global_status =
>  		pmu->global_ovf_ctrl = 0;
> 

Queued, thanks.

Paolo