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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A582C433F5 for ; Fri, 26 Nov 2021 10:24:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376906AbhKZK1T (ORCPT ); Fri, 26 Nov 2021 05:27:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234900AbhKZKZS (ORCPT ); Fri, 26 Nov 2021 05:25:18 -0500 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D3D7C0613D7 for ; Fri, 26 Nov 2021 02:13:01 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id p18-20020a17090ad31200b001a78bb52876so9574103pju.3 for ; Fri, 26 Nov 2021 02:13:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=P6Gz7Sa13Nz5wo9ag7NEcCeQMS9LijqUptPqbUded4Q=; b=RDiRBa04/sm/GqwB8OnMl1DB0+qIhIcj/QiWAipeKcyj8TDk1ubUP2SB7JTtcnOfGC 6mA5Qelm7Qb+1f6ZIvBfONmeaF6per6w9CpGTjPKyEk6nk5xDPhnno1RXuF5D4GOpw4k M4JZO8JleLtyy8ZD06pbPOEjQQcaZqcK0R2aGdngr/gC+qdL9kI0R5eLx4YWc1z7UvRx Qk+We1ACtIIO/uZ3EIFSRMGZqRQXXQeX3YvSxC0dzLSMdRcF7lKtsZvY8ObKzNql3H1x 9RbTuNmhyz5+ifiQl7vMrb2O91+D3eLLe/KWt3NAhXpvJm0WyxgEFH6x+7u3W7rn7jBC rSFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=P6Gz7Sa13Nz5wo9ag7NEcCeQMS9LijqUptPqbUded4Q=; b=slUZ4XuOkJ8tPqjcTDk/5dyTqSJIRphPFtdp8qgLIwDmAFywUWqNGil+IyvFScfcoj 91tyWKaCq3pLZxiZMclWQBgDV2pvhEj+gdbGIZbEcEhy0Yhvoow7wa7jgZfkoWH536O5 w5zIhy25QLbVSxAsvmDFAE43b9LauLiPIkjoujReTYieO25OZAOGOckKlG8coI5LIy75 Jx9b4dsPnhBixoTzTPthX4BXKvoJlwTgVIUsm2eoH6pOER8ZTMBFCI4BilX/iDQ5x1WP wS5kSfC4S/KWeQ3fu0/AoELugk4k5JfLVIMBJyb07gwChwBxqj09U4ruXccqJRZJy8wi p6fQ== X-Gm-Message-State: AOAM532fARJT+ytfKw0tm7JG3eMLU+gM/yDK06nKw5kDFCtv3i79m7tw dbsGXOUAm6fwVDEzhVNJB21pzhVRaQo= X-Google-Smtp-Source: ABdhPJzqeQq6S3dv2vNKiKuKeR9/zyRyBoSjA0aG0IRR2hiWy83XdShIpIJLEY5XzY7CpTLIuZtPCQ== X-Received: by 2002:a17:902:dacb:b0:141:e931:3b49 with SMTP id q11-20020a170902dacb00b00141e9313b49mr36125560plx.45.1637921581118; Fri, 26 Nov 2021 02:13:01 -0800 (PST) Received: from localhost ([47.251.3.230]) by smtp.gmail.com with ESMTPSA id z10sm1045999pfh.188.2021.11.26.02.13.00 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 26 Nov 2021 02:13:00 -0800 (PST) From: Lai Jiangshan To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, Lai Jiangshan , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Ben Widawsky , Dave Jiang , Dan Williams , Peter Zijlstra , Kees Cook Subject: [PATCH V6 10/49] x86: Mark __native_read_cr3() & native_write_cr3() as __always_inline Date: Fri, 26 Nov 2021 18:11:30 +0800 Message-Id: <20211126101209.8613-11-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20211126101209.8613-1-jiangshanlai@gmail.com> References: <20211126101209.8613-1-jiangshanlai@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lai Jiangshan We need __native_read_cr3() & native_write_cr3() to be ensured noinstr. It is prepared for later patches which implement entry code in C file. Some of the code needs to handle KPTI and has to read/write CR3. Signed-off-by: Lai Jiangshan --- arch/x86/include/asm/special_insns.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h index 68c257a3de0d..fbb057ba60e6 100644 --- a/arch/x86/include/asm/special_insns.h +++ b/arch/x86/include/asm/special_insns.h @@ -42,14 +42,14 @@ static __always_inline void native_write_cr2(unsigned long val) asm volatile("mov %0,%%cr2": : "r" (val) : "memory"); } -static inline unsigned long __native_read_cr3(void) +static __always_inline unsigned long __native_read_cr3(void) { unsigned long val; asm volatile("mov %%cr3,%0\n\t" : "=r" (val) : __FORCE_ORDER); return val; } -static inline void native_write_cr3(unsigned long val) +static __always_inline void native_write_cr3(unsigned long val) { asm volatile("mov %0,%%cr3": : "r" (val) : "memory"); } -- 2.19.1.6.gb485710b