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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 70DA8C433B4 for ; Wed, 19 May 2021 12:22:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 51A5561353 for ; Wed, 19 May 2021 12:22:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346364AbhESMYK (ORCPT ); Wed, 19 May 2021 08:24:10 -0400 Received: from 8bytes.org ([81.169.241.247]:39896 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241424AbhESMYK (ORCPT ); Wed, 19 May 2021 08:24:10 -0400 Received: by theia.8bytes.org (Postfix, from userid 1000) id 562EB2FA; Wed, 19 May 2021 14:22:49 +0200 (CEST) Date: Wed, 19 May 2021 14:22:48 +0200 From: Joerg Roedel To: Sean Christopherson Cc: x86@kernel.org, Hyunwook Baek , Joerg Roedel , stable@vger.kernel.org, hpa@zytor.com, Andy Lutomirski , Dave Hansen , Peter Zijlstra , Jiri Slaby , Dan Williams , Tom Lendacky , Juergen Gross , Kees Cook , David Rientjes , Cfir Cohen , Erdem Aktas , Masami Hiramatsu , Mike Stunes , Martin Radev , Arvind Sankar , linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH 4/6] Revert "x86/sev-es: Handle string port IO to kernel memory properly" Message-ID: References: <20210512075445.18935-1-joro@8bytes.org> <20210512075445.18935-5-joro@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Wed, May 12, 2021 at 05:38:29PM +0000, Sean Christopherson wrote: > Alternatively, and probably even better, fold this revert into the switch to > the unchecked version (sounds like those will use kernel-specific flavors?). I folded this revert into the previous commit. But I kept the __get_user()/__put_user() calls and just added a comment explaining why they are used and why it is safe to use them. After all, even the get_kernel*() functions call __get_user_size() under the hood. Regards, Joerg