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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id j21sm1162153wrd.48.2021.09.21.23.38.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Sep 2021 23:38:16 -0700 (PDT) Subject: Re: [PATCH v3 11/16] KVM: x86: More precisely identify NMI from guest when handling PMI To: Sean Christopherson , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Will Deacon , Mark Rutland , Marc Zyngier , Guo Ren , Nick Hu , Greentime Hu , Vincent Chen , Paul Walmsley , Palmer Dabbelt , Albert Ou , Boris Ostrovsky , Juergen Gross Cc: Alexander Shishkin , Jiri Olsa , Namhyung Kim , James Morse , Alexandru Elisei , Suzuki K Poulose , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Stefano Stabellini , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-csky@vger.kernel.org, linux-riscv@lists.infradead.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, Artem Kashkanov , Like Xu , Zhu Lingshan References: <20210922000533.713300-1-seanjc@google.com> <20210922000533.713300-12-seanjc@google.com> From: Paolo Bonzini Message-ID: Date: Wed, 22 Sep 2021 08:38:14 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210922000533.713300-12-seanjc@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org On 22/09/21 02:05, Sean Christopherson wrote: > Note, this also doesn't completely prevent false positives if perf > somehow ends up calling into KVM, e.g. an NMI can arrive in host after > KVM sets its flag. s/calling into KVM/being called from KVM/ ? Not sure about what you meant though. The code is nice, so Reviewed-by: Paolo Bonzini Paolo