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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 69C88C433DB for ; Sat, 6 Feb 2021 04:48:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 36AFA64F97 for ; Sat, 6 Feb 2021 04:48:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229596AbhBFEs1 (ORCPT ); Fri, 5 Feb 2021 23:48:27 -0500 Received: from mga09.intel.com ([134.134.136.24]:63285 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230253AbhBFD20 (ORCPT ); Fri, 5 Feb 2021 22:28:26 -0500 IronPort-SDR: iYW4GTOZKVNT5BB9xlYDRua80hq8n++CmDDLnS47ZpBD1QkFB6zTaWoY+FdsOugVJS8svbZn+M lMb44sIpGI3Q== X-IronPort-AV: E=McAfee;i="6000,8403,9886"; a="181650727" X-IronPort-AV: E=Sophos;i="5.81,156,1610438400"; d="scan'208";a="181650727" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2021 15:39:10 -0800 IronPort-SDR: tOw87rz7/Wba1I0AyQ41/n0QqttABYyZI4zTkDmQFiSGUWcYwBHAbpTRled3t0EB86D4ztnee5 mJAxE+ciKp1w== X-IronPort-AV: E=Sophos;i="5.81,156,1610438400"; d="scan'208";a="416183903" Received: from mdhake-mobl.amr.corp.intel.com (HELO skuppusw-mobl5.amr.corp.intel.com) ([10.209.53.25]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2021 15:39:08 -0800 From: Kuppuswamy Sathyanarayanan To: Peter Zijlstra , Andy Lutomirski , Dave Hansen Cc: Andi Kleen , Kirill Shutemov , Kuppuswamy Sathyanarayanan , Dan Williams , Raj Ashok , Sean Christopherson , linux-kernel@vger.kernel.org, Kuppuswamy Sathyanarayanan Subject: [RFC v1 10/26] x86/io: Allow to override inX() and outX() implementation Date: Fri, 5 Feb 2021 15:38:27 -0800 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Kirill A. Shutemov" The patch allows to override the implementation of the port IO helpers. TDX code will provide an implementation that redirect the helpers to paravirt calls. Signed-off-by: Kirill A. Shutemov Reviewed-by: Andi Kleen Signed-off-by: Kuppuswamy Sathyanarayanan --- arch/x86/include/asm/io.h | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index d726459d08e5..ef7a686a55a9 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -271,18 +271,26 @@ static inline bool sev_key_active(void) { return false; } #endif /* CONFIG_AMD_MEM_ENCRYPT */ +#ifndef __out +#define __out(bwl, bw) \ + asm volatile("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)) +#endif + +#ifndef __in +#define __in(bwl, bw) \ + asm volatile("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)) +#endif + #define BUILDIO(bwl, bw, type) \ static inline void out##bwl(unsigned type value, int port) \ { \ - asm volatile("out" #bwl " %" #bw "0, %w1" \ - : : "a"(value), "Nd"(port)); \ + __out(bwl, bw); \ } \ \ static inline unsigned type in##bwl(int port) \ { \ unsigned type value; \ - asm volatile("in" #bwl " %w1, %" #bw "0" \ - : "=a"(value) : "Nd"(port)); \ + __in(bwl, bw); \ return value; \ } \ \ -- 2.25.1