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From: Paolo Bonzini <pbonzini@redhat.com>
To: Mingwei Zhang <mizhang@google.com>,
	Sean Christopherson <seanjc@google.com>,
	Frederick Mayle <fmayle@google.com>,
	Steven Moreland <smoreland@google.com>
Cc: Aaron Lewis <aaronlewis@google.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] KVM: x86/pmu: Reset perf_capabilities in vcpu to 0 if PDCM is disabled
Date: Mon, 29 Jan 2024 15:40:28 +0100	[thread overview]
Message-ID: <287ec316-1de5-4777-b56a-2a1b22fbe89c@redhat.com> (raw)
In-Reply-To: <CAL715WKMpui=+U56Qc5AiuLhUw_g-bjvtN5OmVz_hGdJmF1M5g@mail.gmail.com>

On 1/26/24 20:30, Mingwei Zhang wrote:
>> Hrm, I don't hate it as a stopgap.  But if we are the only people that are affected,
>> because again I'm pretty sure QEMU is fine, I would rather we just fix things in
>> our VMM and/or internal kernel.
> It is not just QEMU. crossvm is another open source VMM that suffers
> from this one.

Can you explain the symptoms in both Google's internal VMM and crosvm?

Thanks,

Paolo


  parent reply	other threads:[~2024-01-29 14:40 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-24  0:38 [PATCH 0/2] minor fix on perf_capabilities in KVM/x86 Mingwei Zhang
2024-01-24  0:38 ` [PATCH 1/2] KVM: x86/pmu: Reset perf_capabilities in vcpu to 0 if PDCM is disabled Mingwei Zhang
2024-01-24 15:49   ` Sean Christopherson
2024-01-24 21:04     ` Aaron Lewis
2024-01-24 21:25       ` Sean Christopherson
2024-01-24 22:24         ` Mingwei Zhang
2024-01-24 22:51           ` Sean Christopherson
2024-01-25  0:14             ` Mingwei Zhang
2024-01-26 18:33               ` Sean Christopherson
2024-01-26 19:30                 ` Mingwei Zhang
2024-01-26 19:34                   ` Sean Christopherson
2024-01-29 14:40                   ` Paolo Bonzini [this message]
2024-01-29 14:39             ` Paolo Bonzini
2024-01-31 19:43               ` Mingwei Zhang
2024-01-24  0:38 ` [PATCH 2/2] KVM: x86/pmu: Remove vcpu_get_perf_capabilities() Mingwei Zhang
2024-01-24 15:52   ` Sean Christopherson

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