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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 B4A9DC433EF for ; Thu, 9 Sep 2021 22:08:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9DB8B61167 for ; Thu, 9 Sep 2021 22:08:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344035AbhIIWJ6 (ORCPT ); Thu, 9 Sep 2021 18:09:58 -0400 Received: from terminus.zytor.com ([198.137.202.136]:43815 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231819AbhIIWJ5 (ORCPT ); Thu, 9 Sep 2021 18:09:57 -0400 Received: from tazenda.hos.anvin.org ([IPv6:2601:646:8600:3c70:7285:c2ff:fefb:fd4]) (authenticated bits=0) by mail.zytor.com (8.16.1/8.15.2) with ESMTPSA id 189M8Rx2240627 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Thu, 9 Sep 2021 15:08:38 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 189M8Rx2240627 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2021083001; t=1631225319; bh=Yj10jMDgE21CotwexBht+qnc1+Xh+HUHPDT1ZPipEPA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HvVu4vEWnWsYTT3cwGpzthFC0DVuAe5+LKeMg7QI8WfMVpY4y0/AyzubR3TV29R+b LSjfRWTcOQt19FFYCIfl56BxiUeSMtnatJlTXhSC5S9IxEw3/fJaGN6C85WwL/6eV/ IVAB65IA391BPvb1/zrfCOo54ANqWH/NGL0C5Y9yWE3Sa/krxUEpE2UfqbVQKMbgPk 9WDpUxzj5JDrriVg82UN8HpQDU92eUQ6uXGVeKY6z7yfGCFTm5L73Ed8CNynXtpHZF jjcO4tDSVlCYtkQ8lPXFnroLsj0irSO20W9AlylTkQoMZcmkX3kStRTWBKVeQDbxvW KOFo6QIPz/9Kw== From: "H. Peter Anvin (Intel)" To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski Cc: Linux Kernel Mailing List , x86@kernel.org, "H. Peter Anvin (Intel)" Subject: [PATCH v2 1/2] x86/asm: add _ASM_RIP() macro for x86-64 (%rip) suffix Date: Thu, 9 Sep 2021 15:08:17 -0700 Message-Id: <20210909220818.417312-2-hpa@zytor.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210909220818.417312-1-hpa@zytor.com> References: <20210908171716.3340120-1-hpa@zytor.com> <20210909220818.417312-1-hpa@zytor.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a macro _ASM_RIP() to add a (%rip) suffix on 64 bits only. This is useful for immediate memory references using e.g. an "i" constraint where one doesn't want gcc to possibly use a register indirection as it may in the case of an "m" constraint. Signed-off-by: H. Peter Anvin (Intel) --- arch/x86/include/asm/asm.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h index 3ad3da9a7d97..c5a19ccda0fe 100644 --- a/arch/x86/include/asm/asm.h +++ b/arch/x86/include/asm/asm.h @@ -6,11 +6,13 @@ # define __ASM_FORM(x, ...) x,## __VA_ARGS__ # define __ASM_FORM_RAW(x, ...) x,## __VA_ARGS__ # define __ASM_FORM_COMMA(x, ...) x,## __VA_ARGS__, +# define __ASM_REGPFX % #else #include # define __ASM_FORM(x, ...) " " __stringify(x,##__VA_ARGS__) " " # define __ASM_FORM_RAW(x, ...) __stringify(x,##__VA_ARGS__) # define __ASM_FORM_COMMA(x, ...) " " __stringify(x,##__VA_ARGS__) "," +# define __ASM_REGPFX %% #endif #define _ASM_BYTES(x, ...) __ASM_FORM(.byte x,##__VA_ARGS__ ;) @@ -49,6 +51,9 @@ #define _ASM_SI __ASM_REG(si) #define _ASM_DI __ASM_REG(di) +/* Adds a (%rip) suffix on 64 bits only; for immediate memory references */ +#define _ASM_RIP(x) __ASM_SEL_RAW(x, x (__ASM_REGPFX rip)) + #ifndef __x86_64__ /* 32 bit */ -- 2.31.1