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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68675C433EF for ; Tue, 5 Oct 2021 20:42:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4DC4161130 for ; Tue, 5 Oct 2021 20:42:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235807AbhJEUnw (ORCPT ); Tue, 5 Oct 2021 16:43:52 -0400 Received: from mga07.intel.com ([134.134.136.100]:11157 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230019AbhJEUnt (ORCPT ); Tue, 5 Oct 2021 16:43:49 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10128"; a="289354589" X-IronPort-AV: E=Sophos;i="5.85,349,1624345200"; d="scan'208";a="289354589" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Oct 2021 13:41:58 -0700 X-IronPort-AV: E=Sophos;i="5.85,349,1624345200"; d="scan'208";a="523979457" Received: from alyee-mobl.amr.corp.intel.com (HELO skuppusw-desk1.amr.corp.intel.com) ([10.254.5.222]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Oct 2021 13:41:57 -0700 From: Kuppuswamy Sathyanarayanan To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Paolo Bonzini , David Hildenbrand , Andrea Arcangeli , Josh Poimboeuf , "H . Peter Anvin" Cc: Dave Hansen , Tony Luck , Dan Williams , Andi Kleen , Kirill Shutemov , Sean Christopherson , Kuppuswamy Sathyanarayanan , linux-kernel@vger.kernel.org Subject: [PATCH v7 01/10] x86/io: Allow to override inX() and outX() implementation Date: Tue, 5 Oct 2021 13:41:27 -0700 Message-Id: <20211005204136.1812078-2-sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211005204136.1812078-1-sathyanarayanan.kuppuswamy@linux.intel.com> References: <20211005204136.1812078-1-sathyanarayanan.kuppuswamy@linux.intel.com> 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 Reviewed-by: Tony Luck Signed-off-by: Kuppuswamy Sathyanarayanan --- Changes since v6: * None Changes since v5: * None Changes since v4: * None Changes since v3: * None Changes since v2: * None 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 5c6a4af0b911..3647a96238a9 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