From patchwork Tue Nov 5 20:58:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ard Biesheuvel X-Patchwork-Id: 11228597 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 23A2E1390 for ; Tue, 5 Nov 2019 21:07:25 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D5A652087E for ; Tue, 5 Nov 2019 21:07:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gLPEizkJ"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="QvS+IU9+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D5A652087E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=HZFnflJ/KPiHGLiPxO+E6KLwPQsr0vN3Si1DLd9uvQU=; b=gLPEizkJcbdkb9l8F7NKdVrT/F R1AY93LNlRRbObMXbYR+ZT8ST50RForPif5WqNSsfneZW4S67EjUgdFNJ8gbAfGN1jiJESJC5Y/O4 cVeWbXA5cMywQ6cJHsWSIShE/spvLvd09yC9Cipf/lk6VUQA841PL42n8moujmqS6V4TzdodX+Q/U P0jw/TfMuVQR8+T+rGkFM+ICf0zlhI7RgZDAbrjgGRyeFdLgHjpCWnZDUefG0dv3d1bHirTadNSdl OaOETY9D+BR5DVttkt+10Zw10azRE++NTIrJ1YGjqFUdhB141F6AbRwv2DgeVns8BGPLq5CXvNj1k C/4GYJxA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iS62q-0006z6-B9; Tue, 05 Nov 2019 21:07:20 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iS5w8-0007cv-Ub for linux-arm-kernel@lists.infradead.org; Tue, 05 Nov 2019 21:00:26 +0000 Received: from e123331-lin.home (lfbn-mar-1-643-104.w90-118.abo.wanadoo.fr [90.118.215.104]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F2FC121A49; Tue, 5 Nov 2019 21:00:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572987624; bh=iNHMZZRltxS1MHgceMfHooYFXLtSicrOLVVkCXWKYjs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QvS+IU9+ovJMx6Cs+TaOvoT/Lk5oDm5z+mvKnKd6zGGAVzedXzjHLLVL6c45TDySv oh4IDyCe6DrEM4qrI9UCfBd9fwKpYTtfopgqjpHjDTldMSZfm7LFyOGXU8QwFGoial jXqfvjdp3ydFJSMHUgmowKay1lK3AftqkJdrViYg= From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Subject: [PATCH for-stable-v4.4 30/53] ARM: spectre-v1: add speculation barrier (csdb) macros Date: Tue, 5 Nov 2019 21:58:23 +0100 Message-Id: <20191105205846.1394-31-ardb@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191105205846.1394-1-ardb@kernel.org> References: <20191105205846.1394-1-ardb@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191105_130025_030217_BC7C0BE0 X-CRM114-Status: UNSURE ( 9.53 ) X-CRM114-Notice: Please train this message. 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Long" , Marc Zyngier , Will Deacon , Ard Biesheuvel MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Russell King Commit a78d156587931a2c3b354534aa772febf6c9e855 upstream. Add assembly and C macros for the new CSDB instruction. Signed-off-by: Russell King Acked-by: Mark Rutland Boot-tested-by: Tony Lindgren Reviewed-by: Tony Lindgren Signed-off-by: David A. Long Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ard Biesheuvel --- arch/arm/include/asm/assembler.h | 8 ++++++++ arch/arm/include/asm/barrier.h | 13 +++++++++++++ 2 files changed, 21 insertions(+) diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index 4a275fba6059..307901f88a1e 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -441,6 +441,14 @@ THUMB( orr \reg , \reg , #PSR_T_BIT ) .size \name , . - \name .endm + .macro csdb +#ifdef CONFIG_THUMB2_KERNEL + .inst.w 0xf3af8014 +#else + .inst 0xe320f014 +#endif + .endm + .macro check_uaccess, addr:req, size:req, limit:req, tmp:req, bad:req #ifndef CONFIG_CPU_USE_DOMAINS adds \tmp, \addr, #\size - 1 diff --git a/arch/arm/include/asm/barrier.h b/arch/arm/include/asm/barrier.h index 27c1d26b05b5..edd9e633a84b 100644 --- a/arch/arm/include/asm/barrier.h +++ b/arch/arm/include/asm/barrier.h @@ -18,6 +18,12 @@ #define isb(option) __asm__ __volatile__ ("isb " #option : : : "memory") #define dsb(option) __asm__ __volatile__ ("dsb " #option : : : "memory") #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") +#ifdef CONFIG_THUMB2_KERNEL +#define CSDB ".inst.w 0xf3af8014" +#else +#define CSDB ".inst 0xe320f014" +#endif +#define csdb() __asm__ __volatile__(CSDB : : : "memory") #elif defined(CONFIG_CPU_XSC3) || __LINUX_ARM_ARCH__ == 6 #define isb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \ : : "r" (0) : "memory") @@ -38,6 +44,13 @@ #define dmb(x) __asm__ __volatile__ ("" : : : "memory") #endif +#ifndef CSDB +#define CSDB +#endif +#ifndef csdb +#define csdb() +#endif + #ifdef CONFIG_ARM_HEAVY_MB extern void (*soc_mb)(void); extern void arm_heavy_mb(void);