From: Paolo Bonzini <pbonzini@redhat.com>
To: like.xu@intel.com, peterz@infradead.org
Cc: Like Xu <like.xu@linux.intel.com>, Yao <yao.jin@linux.intel.com>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH] KVM: x86/pmu: Add '.exclude_hv = 1' for guest perf_event
Date: Wed, 12 Aug 2020 15:04:44 +0200 [thread overview]
Message-ID: <8bdc60d5-c9ef-4e8f-6b73-b7bd012d9d30@redhat.com> (raw)
In-Reply-To: <b55afd09-77c8-398b-309b-6bd9f9cfc876@intel.com>
On 12/08/20 14:56, Xu, Like wrote:
>
> My proposal is to define:
> the "hypervisor privilege levels" events in the KVM/x86 context as
> all the host kernel events plus /dev/kvm user space events.
What are "/dev/kvm user space events"? In any case, this patch should
be included only in the series that adds exclude_hv support in arch/x86.
Paolo
> If we add ".exclude_hv = 1" in the pmc_reprogram_counter(),
> do you see any side effect to cover the above usages?
>
> The fact that exclude_hv has never been used in x86 does help
> the generic perf code to handle permission checks in a more concise way.
next prev parent reply other threads:[~2020-08-12 13:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-12 5:07 [PATCH] KVM: x86/pmu: Add '.exclude_hv = 1' for guest perf_event Like Xu
2020-08-12 10:25 ` Paolo Bonzini
2020-08-12 11:11 ` peterz
2020-08-12 11:32 ` Paolo Bonzini
2020-08-12 12:56 ` Xu, Like
2020-08-12 13:04 ` Paolo Bonzini [this message]
2020-08-12 13:14 ` Xu, Like
2020-08-12 13:31 ` peterz
2020-08-12 13:51 ` Paolo Bonzini
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