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=-8.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 27DE7C433E1 for ; Sat, 18 Jul 2020 04:40:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E89A2076D for ; Sat, 18 Jul 2020 04:40:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726403AbgGREkh (ORCPT ); Sat, 18 Jul 2020 00:40:37 -0400 Received: from mx2.suse.de ([195.135.220.15]:44846 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725809AbgGREkg (ORCPT ); Sat, 18 Jul 2020 00:40:36 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id AE7E6AE47; Sat, 18 Jul 2020 04:40:39 +0000 (UTC) Subject: Re: [PATCH v3] x86/ioperm: Fix io bitmap invalidation on Xen PV To: Andy Lutomirski , x86@kernel.org Cc: Andrew Cooper , LKML , Boris Ostrovsky , Stefano Stabellini , stable@vger.kernel.org, Thomas Gleixner References: From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: Date: Sat, 18 Jul 2020 06:40:33 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 18.07.20 01:53, Andy Lutomirski wrote: > tss_invalidate_io_bitmap() wasn't wired up properly through the pvop > machinery, so the TSS and Xen's io bitmap would get out of sync > whenever disabling a valid io bitmap. > > Add a new pvop for tss_invalidate_io_bitmap() to fix it. > > This is XSA-329. > > Cc: Juergen Gross > Cc: Boris Ostrovsky > Cc: Stefano Stabellini > Cc: stable@vger.kernel.org > Fixes: 22fe5b0439dd ("x86/ioperm: Move TSS bitmap update to exit to user work") > Reviewed-by: Juergen Gross > Reviewed-by: Thomas Gleixner > Signed-off-by: Andy Lutomirski Reviewed-by: Juergen Gross Juergen