From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9931FC07E95 for ; Tue, 13 Jul 2021 20:28:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7269F61166 for ; Tue, 13 Jul 2021 20:28:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235060AbhGMUbZ (ORCPT ); Tue, 13 Jul 2021 16:31:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229944AbhGMUbY (ORCPT ); Tue, 13 Jul 2021 16:31:24 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A42E9C0613E9 for ; Tue, 13 Jul 2021 13:28:34 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id c15so23343pls.13 for ; Tue, 13 Jul 2021 13:28:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=LxJNrLcxo+1XG3xReG2GznPJ80Kx/41M8LyFkMVe9nw=; b=LVyHap2ItF10BDhXeoGpLsMsy+Kpnq9zg/VQMqQpe+4mMVxsfeZi19ErCqjwPe5z8q HQKrMF+TJEetLHunq9crVxN3cFqO1Vh3hVt9uMxSyRt1oCmdGtQmEYiaPNtMFG1dOLhS 0PKdV6y+2xXlS371/sZsYdffhk5gU3LcuI8g1Ew7QtwKPbNT0t6ERuHwMATY7aMc44Ah +qPzcshSyQD404qt0kkXjBvA+3TvfjlwyceRHG+x/Ys3h6E1VlDvQry4y3lJPZGMrQ2n Ura6G70OULrhe4kwCL1L2LDG8QToCyDlW791EVIza0Ew0evTCVTlTbdJYlnyCCpXw2bs RTDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=LxJNrLcxo+1XG3xReG2GznPJ80Kx/41M8LyFkMVe9nw=; b=bkK74wQhw1lENQFaCfyj1ixVLMxUAhPUy9KjW1vAhTKgOHD+WLfU3lmjNE5Ro0vFQ5 eLftImthejoLXeE/t9j9eV3i6hc2wEnE+2fGcxNtaG36SDe+m2lNEpiqwMfYmAQXYshS vxE9V3SFjrsrK3t3WJqux4I6TN7Xfa34VhJW/ZZlRyaLHl2C0342q9dMAv+ewpUALgFv m3cgckf8IK6RbIpbBxlC0cKeVwZrvxJTuZ0DUN1tLQOMb0vwzOIM5/8MUexRYymZmrZA YqdtMz6P0cJm7zs0H7hu9rfQ/VRdva+QBNxkZht+aEn5q94rnVM4M+VH552zBIrjljF5 vO6A== X-Gm-Message-State: AOAM5332FqqOE8f5faCRo652BR1ix0MCRGXOKZ5nBDdKeaEtJpizVT2M 9lGoSdhHzUSgU/w+JzQttB9yGA== X-Google-Smtp-Source: ABdhPJyX+I+K9qk9PMf8bCXNz0VTk1pIktY4RsEHVeMVTqDe/l6s4cyo0FaDlkFoCm8rvOHptNsbJQ== X-Received: by 2002:a17:902:bcc7:b029:12b:32c5:3d31 with SMTP id o7-20020a170902bcc7b029012b32c53d31mr3245556pls.55.1626208113905; Tue, 13 Jul 2021 13:28:33 -0700 (PDT) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id u24sm32501pfm.141.2021.07.13.13.28.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Jul 2021 13:28:33 -0700 (PDT) Date: Tue, 13 Jul 2021 20:28:29 +0000 From: Sean Christopherson To: isaku.yamahata@intel.com Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Paolo Bonzini , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , erdemaktas@google.com, Connor Kuehl , x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, isaku.yamahata@gmail.com, Sean Christopherson Subject: Re: [RFC PATCH v2 20/69] KVM: x86/mmu: Mark VM as bugged if page fault returns RET_PF_INVALID Message-ID: References: <298980aa5fc5707184ac082287d13a800cd9c25f.1625186503.git.isaku.yamahata@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <298980aa5fc5707184ac082287d13a800cd9c25f.1625186503.git.isaku.yamahata@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 02, 2021, isaku.yamahata@intel.com wrote: > From: Sean Christopherson For a changelog: Mark a VM as bugged instead of simply warning if the core page fault handler unexpectedly returns RET_PF_INVALID. KVM's (undocumented) API for the page fault path does not allow returning RET_PF_INVALID, e.g. a fatal condition should be morphed to -errno. > Signed-off-by: Sean Christopherson > Signed-off-by: Isaku Yamahata > ---