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[198.145.29.99]) by mx.google.com with ESMTPS id p8si16521549pgc.362.2019.05.13.08.51.18 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 May 2019 08:51:18 -0700 (PDT) Received-SPF: pass (google.com: domain of luto@kernel.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=fyu+eEyt; spf=pass (google.com: domain of luto@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=luto@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from mail-wr1-f53.google.com (mail-wr1-f53.google.com [209.85.221.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F2FFD21707 for ; Mon, 13 May 2019 15:51:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557762678; bh=VO5BWtK/NhFMUgfePe27x1pllPiG08W6xyS+rnVVOZ8=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=fyu+eEytsVWPHDXWOsfR/TJPqHCmbiYlK1Fnjgm+jpYglv6rVvm/+qXEvZm5ZT01+ Y5BbMjwW0+hAE1oCsSINHifec3q/3FiaUs/zGMRfMHVEN4gqXnxNhy75utPulzWWZm sbdTaN4z+XaFRnmavwNqVm51mR8QZNfjMl4l8AIg= Received: by mail-wr1-f53.google.com with SMTP id h4so15885598wre.7 for ; Mon, 13 May 2019 08:51:17 -0700 (PDT) X-Received: by 2002:adf:ec42:: with SMTP id w2mr17344670wrn.77.1557762676520; Mon, 13 May 2019 08:51:16 -0700 (PDT) MIME-Version: 1.0 References: <1557758315-12667-1-git-send-email-alexandre.chartre@oracle.com> <1557758315-12667-7-git-send-email-alexandre.chartre@oracle.com> In-Reply-To: <1557758315-12667-7-git-send-email-alexandre.chartre@oracle.com> From: Andy Lutomirski Date: Mon, 13 May 2019 08:51:04 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [RFC KVM 06/27] KVM: x86: Exit KVM isolation on IRQ entry To: Alexandre Chartre Cc: Paolo Bonzini , Radim Krcmar , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Dave Hansen , Andrew Lutomirski , Peter Zijlstra , kvm list , X86 ML , Linux-MM , LKML , Konrad Rzeszutek Wilk , jan.setjeeilers@oracle.com, Liran Alon , Jonathan Adams Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, May 13, 2019 at 7:39 AM Alexandre Chartre wrote: > > From: Liran Alon > > Next commits will change most of KVM #VMExit handlers to run > in KVM isolated address space. Any interrupt handler raised > during execution in KVM address space needs to switch back > to host address space. > > This patch makes sure that IRQ handlers will run in full > host address space instead of KVM isolated address space. IMO this needs to be somewhere a lot more central. What about NMI and MCE? Or async page faults? Or any other entry? --Andy