From patchwork Wed Nov 27 18:44:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pasha Tatashin X-Patchwork-Id: 11264737 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 B70F0138C for ; Wed, 27 Nov 2019 18:46:08 +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 8EA9D20835 for ; Wed, 27 Nov 2019 18:46:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="rc/gsIKm"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=soleen.com header.i=@soleen.com header.b="eznVBLON" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8EA9D20835 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=soleen.com 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:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=AJq72BrPC9WeiF8aS3/9Y4kc6xy6VzvF+/UTD9Fyvy0=; b=rc/gsIKmIOzqKM pVuZuDZJwts3jwtqbcOcWr9MecHRu1MfRbHPpbqpUFOP/7HSXYWpvkFGWCKFlWesnm3cqvqTyqr5w cVaawV+0hbMTqTe/T7PqJ02Y4DpGDgfv5DFQjOOiG/D6gB7+RnvYoIaCoODXHn+OqGvCcACD/jBTp spW7lv+udotYjnXWtvKmUsyyPFDc75k2bJWKAfWkYkmIgyrCiBaLupMcchlHbUVeVVw4K4Cv8MrZY BoQrQVhrInlYK8/6wJxsXaObDep/I93TrSYQPkEwbhiLio1Fcd5dybP8/aVzaH365RgKcdk8ppJSz 6uMDs+f8HIO8LrU/8z0A==; 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 1ia2KD-0002mv-Eq; Wed, 27 Nov 2019 18:46:05 +0000 Received: from mail-qk1-x743.google.com ([2607:f8b0:4864:20::743]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ia2JB-0000ls-RQ for linux-arm-kernel@lists.infradead.org; Wed, 27 Nov 2019 18:45:05 +0000 Received: by mail-qk1-x743.google.com with SMTP id x1so5714436qkl.12 for ; Wed, 27 Nov 2019 10:45:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=FcqPaEmX1C8efPcruT1Ss1wL4IPrdaYzf7CQNMsgj94=; b=eznVBLONWH9RFdeS+JWy0FGl8QAD+vm34z6dm1k2p5zZ7HI/8kjI36VWlkWqDfubeh lEd78mcbZwoqmJ7F5+KAxxTIFaBL6G9fSDL8/ukeSwC810swC1cKx9/8HSV0NBoFKg9Y wIoaXrXkUeM4AXY49Bsoo3CAOCUB2fs01Fq7BYq1L9JH3lV+TdRn8+jEueaUdGkkk4UY HB/rqkhuzNEPqEkkNmO5FnRFsFjekB5xmmsdDbY4BPP94oCrK94N4kQcUAL42YPfuFt0 1MyFLFDzOXAT5KmLPlFmxy00UWnou60rtqyNAyWi5fDUd5HVt5zlKYcp3I7NjXNzN3r5 FlZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=FcqPaEmX1C8efPcruT1Ss1wL4IPrdaYzf7CQNMsgj94=; b=COFKfjvdlNARk2QDJbSpraejEEZ9Chhidbd8R/SQSks1VDxtlunUJzfhmKO2os9Vau 1WVpxrJqYr9oBo1z5FrabryqEihfTN5QIcrsqyVjXeVa1UAoVW2W4eewYuZlkKnQfWpP Hyg0N7wMS65O15+4AJbwPjTaspdAo0FHd9M2m1y4RWiCetZFGXHulUxnlWwYkcGG+xK7 CQN5z1x6Y94eXHHx6sikR8nVpUiVhkgn850IUvkbCFcQ3oQSiK04fmBkQQCaB+soojqR PVON+3TlBecUgqWniy7670aihkbnUe8F5uX45oDdQdp3ykrYKZl4U/BgVACoyLm9Pjii fAiw== X-Gm-Message-State: APjAAAWEnya9c0LWTOsy24AdIN4l0ngCCiZRHQojhDF6d8XiKmDJDiSQ NsjkOm84Gd2G8Fa/nw4R6boxPA== X-Google-Smtp-Source: APXvYqxODZjoyu3d3RGASH7OUduNJ/cZUXkrbGjWhw9cRiiL8AHlBVoF9V2wf1+s54sFfgF+kEcm/g== X-Received: by 2002:a37:61c2:: with SMTP id v185mr6048615qkb.429.1574880300941; Wed, 27 Nov 2019 10:45:00 -0800 (PST) Received: from localhost.localdomain (c-73-69-118-222.hsd1.nh.comcast.net. [73.69.118.222]) by smtp.gmail.com with ESMTPSA id o62sm2748024qte.76.2019.11.27.10.44.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Nov 2019 10:45:00 -0800 (PST) From: Pavel Tatashin To: pasha.tatashin@soleen.com, jmorris@namei.org, sashal@kernel.org, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, will@kernel.org, steve.capper@arm.com, linux-arm-kernel@lists.infradead.org, marc.zyngier@arm.com, james.morse@arm.com, vladimir.murzin@arm.com, mark.rutland@arm.com, tglx@linutronix.de, gregkh@linuxfoundation.org, allison@lohutok.net, info@metux.net, alexios.zavras@intel.com, sstabellini@kernel.org, boris.ostrovsky@oracle.com, jgross@suse.com, stefan@agner.ch, yamada.masahiro@socionext.com, xen-devel@lists.xenproject.org, linux@armlinux.org.uk Subject: [PATCH 3/3] arm64: remove the rest of asm-uaccess.h Date: Wed, 27 Nov 2019 13:44:53 -0500 Message-Id: <20191127184453.229321-4-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191127184453.229321-1-pasha.tatashin@soleen.com> References: <20191127184453.229321-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191127_104501_977697_1CFD050C X-CRM114-Status: GOOD ( 12.87 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:743 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The __uaccess_ttbr0_disable and __uaccess_ttbr0_enable, are the last two macros defined in asm-uaccess.h. For now move them to entry.S where they are used. Eventually, these macros should be replaced with C wrappers to reduce the maintenance burden. Also, once these macros are unified with the C counterparts, it is a good idea to check that PAN is in correct state on every enable/disable calls. Signed-off-by: Pavel Tatashin --- arch/arm64/include/asm/asm-uaccess.h | 39 ---------------------------- arch/arm64/kernel/entry.S | 27 ++++++++++++++++++- arch/arm64/lib/clear_user.S | 2 +- arch/arm64/lib/copy_from_user.S | 2 +- arch/arm64/lib/copy_in_user.S | 2 +- arch/arm64/lib/copy_to_user.S | 2 +- arch/arm64/mm/cache.S | 1 - 7 files changed, 30 insertions(+), 45 deletions(-) delete mode 100644 arch/arm64/include/asm/asm-uaccess.h diff --git a/arch/arm64/include/asm/asm-uaccess.h b/arch/arm64/include/asm/asm-uaccess.h deleted file mode 100644 index fba2a69f7fef..000000000000 --- a/arch/arm64/include/asm/asm-uaccess.h +++ /dev/null @@ -1,39 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __ASM_ASM_UACCESS_H -#define __ASM_ASM_UACCESS_H - -#include -#include -#include -#include -#include - -/* - * User access enabling/disabling macros. - */ -#ifdef CONFIG_ARM64_SW_TTBR0_PAN - .macro __uaccess_ttbr0_disable, tmp1 - mrs \tmp1, ttbr1_el1 // swapper_pg_dir - bic \tmp1, \tmp1, #TTBR_ASID_MASK - sub \tmp1, \tmp1, #RESERVED_TTBR0_SIZE // reserved_ttbr0 just before swapper_pg_dir - msr ttbr0_el1, \tmp1 // set reserved TTBR0_EL1 - isb - add \tmp1, \tmp1, #RESERVED_TTBR0_SIZE - msr ttbr1_el1, \tmp1 // set reserved ASID - isb - .endm - - .macro __uaccess_ttbr0_enable, tmp1, tmp2 - get_current_task \tmp1 - ldr \tmp1, [\tmp1, #TSK_TI_TTBR0] // load saved TTBR0_EL1 - mrs \tmp2, ttbr1_el1 - extr \tmp2, \tmp2, \tmp1, #48 - ror \tmp2, \tmp2, #16 - msr ttbr1_el1, \tmp2 // set the active ASID - isb - msr ttbr0_el1, \tmp1 // set the non-PAN TTBR0_EL1 - isb - .endm -#endif - -#endif diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 583f71abbe98..446d90ab31af 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -22,8 +22,8 @@ #include #include #include +#include #include -#include #include /* @@ -143,6 +143,31 @@ alternative_cb_end #endif .endm +#ifdef CONFIG_ARM64_SW_TTBR0_PAN + .macro __uaccess_ttbr0_disable, tmp1 + mrs \tmp1, ttbr1_el1 // swapper_pg_dir + bic \tmp1, \tmp1, #TTBR_ASID_MASK + sub \tmp1, \tmp1, #RESERVED_TTBR0_SIZE // reserved_ttbr0 just before swapper_pg_dir + msr ttbr0_el1, \tmp1 // set reserved TTBR0_EL1 + isb + add \tmp1, \tmp1, #RESERVED_TTBR0_SIZE + msr ttbr1_el1, \tmp1 // set reserved ASID + isb + .endm + + .macro __uaccess_ttbr0_enable, tmp1, tmp2 + get_current_task \tmp1 + ldr \tmp1, [\tmp1, #TSK_TI_TTBR0] // load saved TTBR0_EL1 + mrs \tmp2, ttbr1_el1 + extr \tmp2, \tmp2, \tmp1, #48 + ror \tmp2, \tmp2, #16 + msr ttbr1_el1, \tmp2 // set the active ASID + isb + msr ttbr0_el1, \tmp1 // set the non-PAN TTBR0_EL1 + isb + .endm +#endif + .macro kernel_entry, el, regsize = 64 .if \regsize == 32 mov w0, w0 // zero upper 32 bits of x0 diff --git a/arch/arm64/lib/clear_user.S b/arch/arm64/lib/clear_user.S index aeafc03e961a..b0b4a86a09e2 100644 --- a/arch/arm64/lib/clear_user.S +++ b/arch/arm64/lib/clear_user.S @@ -6,7 +6,7 @@ */ #include -#include +#include #include .text diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S index ebb3c06cbb5d..142bc7505518 100644 --- a/arch/arm64/lib/copy_from_user.S +++ b/arch/arm64/lib/copy_from_user.S @@ -5,7 +5,7 @@ #include -#include +#include #include #include diff --git a/arch/arm64/lib/copy_in_user.S b/arch/arm64/lib/copy_in_user.S index 3d8153a1ebce..04dc48ca26f7 100644 --- a/arch/arm64/lib/copy_in_user.S +++ b/arch/arm64/lib/copy_in_user.S @@ -7,7 +7,7 @@ #include -#include +#include #include #include diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S index 357eae2c18eb..8f3218ae88ab 100644 --- a/arch/arm64/lib/copy_to_user.S +++ b/arch/arm64/lib/copy_to_user.S @@ -5,7 +5,7 @@ #include -#include +#include #include #include diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S index a48b6dba304e..f7130c30d6e3 100644 --- a/arch/arm64/mm/cache.S +++ b/arch/arm64/mm/cache.S @@ -12,7 +12,6 @@ #include #include #include -#include /* * __asm_flush_icache_range(start,end)