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[23.128.96.18]) by mx.google.com with ESMTP id d25si10725810edy.405.2020.09.22.07.56.37; Tue, 22 Sep 2020 07:57:01 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=MITmrFgB; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726661AbgIVOzF (ORCPT + 99 others); Tue, 22 Sep 2020 10:55:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726566AbgIVOzF (ORCPT ); Tue, 22 Sep 2020 10:55:05 -0400 Received: from mail-ej1-x641.google.com (mail-ej1-x641.google.com [IPv6:2a00:1450:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 501BBC061755; Tue, 22 Sep 2020 07:55:05 -0700 (PDT) Received: by mail-ej1-x641.google.com with SMTP id u21so23373072eja.2; Tue, 22 Sep 2020 07:55:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Gl5ZXaZZ9fFMo8zIy0Ez6Sy7ZC3ZaHBolK1ZtfIsQ1M=; b=MITmrFgBfmfYhmnGnMZGY2k0h3KBiqya6FX1qg6lLXkJHFeon70tFYOkIBYQuX/ek0 SDdzhd4zicKnUgjB/Pj7uKYWvrf8GP8Jy+IiBTbFZy2t+aW4WaadmFqHhtUGf1Pz/1XU QLsUjySBl5TgDiVlbkzww0qA2NZZtWHMhNNn8eWcc7XgkvIqxxk4ZogpWTOzgbbTHaya kEDsIAaLE9dtmaFpmdYtmXx2l8AtkZ9RyIrl5qw2BXW1bqckbNPEyvE7193IYZO0yzBA xFRRdI63czmhG9GIq7jNRMZ5szFLHkCQR6DyNoAlqo/ddw4N63Mi3daas2BWohMWMKKy a0kA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Gl5ZXaZZ9fFMo8zIy0Ez6Sy7ZC3ZaHBolK1ZtfIsQ1M=; b=SYvHMfdrQxE9Ns/jsz2uvkH/heYrGGvyzezQkDQ7dv8RJQ3lj5+UTvVcOHCaWVuMKt XDENd/ZvZD/BnfxdOuQi6OnK/FGkucTKCv3S03AFQpn2nKQWNBHQYnpHOyhczft+yX9x hL4WR76AdmlmludPzTqdo2n6/1q6IsJM5oggA35TlHC3j/Dk45RsJyLfOtYn1Tbb6jsc DkaVZ330j+nDcDzcLpnBeXF+tNUcaSzcX+2TZV4nPNrdv7sPansRCtTD0gsEXDgW/nJ8 2d3aXKjnLxyRymI1PsBRDY6n6LilIdUc6xqqorjFleZSmwXvB+Fu4PoVt4AVHr9+3IyO MCVw== X-Gm-Message-State: AOAM530mJx5LIJXjJRyrPKH7NAY8dTN7Nq2AJzuP6VOiUdFS1ktImh8l X/n2oj+sN/7bjBrv5ZM+dEpQZLYUkMOa8CFJmA== X-Received: by 2002:a17:906:7e42:: with SMTP id z2mr5323385ejr.206.1600786504001; Tue, 22 Sep 2020 07:55:04 -0700 (PDT) MIME-Version: 1.0 References: <1600066548-4343-1-git-send-email-wanpengli@tencent.com> <91baab6a-3007-655a-5c59-6425473d2e33@redhat.com> In-Reply-To: <91baab6a-3007-655a-5c59-6425473d2e33@redhat.com> From: Haiwei Li Date: Tue, 22 Sep 2020 22:54:52 +0800 Message-ID: Subject: Re: [PATCH] KVM: SVM: Analyze is_guest_mode() in svm_vcpu_run() To: Paolo Bonzini , Krish Sadhukhan , Wanpeng Li , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 20/9/22 21:43, Paolo Bonzini wrote: > On 14/09/20 22:43, Krish Sadhukhan wrote: >>> >> >> Not related to your changes, but should we get rid of the variable >> 'exit_fastpath' and just do, >> >> return svm_exit_handler_fastpath(vcpu); >> >> It seems the variable isn't used anywhere else and svm_vcpu_run() >> doesn't return from anywhere else either. > > Yes (also because vmx will do the same once we can push > EXIT_FASTPATH_REENTER_GUEST handling up to vcpu_enter_guest)... Hi, Paolo I have sent a patch to do this, https://lore.kernel.org/kvm/20200915113033.61817-1-lihaiwei.kernel@gmail.com/ Thanks. Haiwei