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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 7990CC433B4 for ; Tue, 18 May 2021 17:05:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59BF56101E for ; Tue, 18 May 2021 17:05:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351064AbhERRG4 (ORCPT ); Tue, 18 May 2021 13:06:56 -0400 Received: from mga06.intel.com ([134.134.136.31]:15523 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239478AbhERRGy (ORCPT ); Tue, 18 May 2021 13:06:54 -0400 IronPort-SDR: QPdF1ztT0rFD0osdKBojHSuUz3+WAjxlTf8xmNDI7RZPDz6v79WX9voKjHbjorVoEB79oM6WjI TVpnGAq8VKVw== X-IronPort-AV: E=McAfee;i="6200,9189,9988"; a="261992703" X-IronPort-AV: E=Sophos;i="5.82,310,1613462400"; d="scan'208";a="261992703" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2021 10:05:33 -0700 IronPort-SDR: 9Y5XrH47M7H7EM4RTFwgxagVk60ykgSs7wGCsE0xsSga+ZhMcAIxRscCSejx3ios1gnrmp/Cna DGvFlZjlwOhQ== X-IronPort-AV: E=Sophos;i="5.82,310,1613462400"; d="scan'208";a="439526861" Received: from akleen-mobl1.amr.corp.intel.com (HELO [10.209.65.183]) ([10.209.65.183]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2021 10:05:33 -0700 Subject: Re: [RFC v2-fix 1/1] x86/tdx: Handle in-kernel MMIO To: Dave Hansen , Kuppuswamy Sathyanarayanan , Peter Zijlstra , Andy Lutomirski Cc: Tony Luck , Kirill Shutemov , Kuppuswamy Sathyanarayanan , Dan Williams , Raj Ashok , Sean Christopherson , linux-kernel@vger.kernel.org References: <3e9a26c3-8eee-88f5-f8e2-8a2dd2c028ea@intel.com> <20210518004807.258503-1-sathyanarayanan.kuppuswamy@linux.intel.com> <36cd2665-6d8b-9c0b-eec1-25152dcca2a3@intel.com> <43e583a3-ee2b-52d8-5275-e26a6609c126@linux.intel.com> <94dc5a5a-8c51-8624-5810-e6278783789c@intel.com> From: Andi Kleen Message-ID: <6f2c97b3-8cfe-9f08-7f70-525039e3d00e@linux.intel.com> Date: Tue, 18 May 2021 10:05:32 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Or, do we expect the first folks who expose a movdir64b-using driver to > TDX to go and update this code? That's what we want to do. > > Also, the sev_key_active() stuff in there makes me nervous. Does this > scheme work with these: > >> static inline void outs##bwl(int port, const void *addr, unsigned long count) \ >> static inline void ins##bwl(int port, void *addr, unsigned long count) \ > ? This is not MMIO, but port IO. We do similar changes as AMD for TDX. -Andi