Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20220117085307.93030-1-likexu@tencent.com> <20220117085307.93030-3-likexu@tencent.com>
 <20220202144308.GB20638@worktop.programming.kicks-ass.net>
 <CALMp9eRBOmwz=mspp0m5Q093K3rMUeAsF3vEL39MGV5Br9wEQQ@mail.gmail.com>
 <YgO/3usazae9rCEh@hirez.programming.kicks-ass.net> <69c0fc41-a5bd-fea9-43f6-4724368baf66@intel.com>
 <CALMp9eS=1U7T39L-vL_cTXTNN2Li8epjtAPoP_+Hwefe9d+teQ@mail.gmail.com> <67a731dd-53ba-0eb8-377f-9707e5c9be1b@intel.com>
In-Reply-To: <67a731dd-53ba-0eb8-377f-9707e5c9be1b@intel.com>
From:   Jim Mattson <jmattson@google.com>
Date:   Sat, 12 Feb 2022 15:32:34 -0800
Message-ID: <CALMp9eRX3nTLs4gcy3wnSUSOPO7xzDpMvDLGauue9o0PwBAmbA@mail.gmail.com>
Subject: Re: [PATCH kvm/queue v2 2/3] perf: x86/core: Add interface to query
 perfmon_event_map[] directly
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Like Xu <like.xu.linux@gmail.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <seanjc@google.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Joerg Roedel <joro@8bytes.org>, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org, Like Xu <likexu@tencent.com>,
        Stephane Eranian <eranian@google.com>,
        David Dunn <daviddunn@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Wed, Feb 9, 2022 at 10:57 AM Dave Hansen <dave.hansen@intel.com> wrote:

> Does SGX cause problem for these people?  It can create some of the same
> collection gaps:
>
>         performance monitoring activities are suppressed when entering
>         an opt-out (of performance monitoring) enclave.

There's our precedent!