From patchwork Wed Nov 22 09:42:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13464403 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D3B6C61D9C for ; Wed, 22 Nov 2023 09:44:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B95366B059C; Wed, 22 Nov 2023 04:44:04 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B44206B059D; Wed, 22 Nov 2023 04:44:04 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9E4B16B059E; Wed, 22 Nov 2023 04:44:04 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 89DB46B059C for ; Wed, 22 Nov 2023 04:44:04 -0500 (EST) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 4CC3DB5AB8 for ; Wed, 22 Nov 2023 09:44:04 +0000 (UTC) X-FDA: 81485104008.01.E8FBA0A Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf25.hostedemail.com (Postfix) with ESMTP id 68135A001B for ; Wed, 22 Nov 2023 09:44:02 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=skgEBYvx; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of broonie@kernel.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=broonie@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1700646242; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=DV5bVXvTe0o/ha9GRNIs1yhe3QvFX1UsR7szIYiQiBI=; b=Ca1NVlYMigI8/870ZHrBpQCPDsC7hLTLR8wJzvhgB6tUzMKEKQ4JAMecJ+oV3YiN+RgTqL QJmjLRdx1xFcw6iJaXjbz7yUvLtA3ICa6x4rdUXUPJAzCFPYQBq+W69PnDgGljog9k98DL +27SraCZeq+3OI71KYU1TdNf30QdQ6s= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=skgEBYvx; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of broonie@kernel.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=broonie@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1700646242; a=rsa-sha256; cv=none; b=sMeHpXKYOKHDGTR8YE2mLO0RsSfzlhVdImjktv5eGVQUY2bT9jzBn3G6Rfev7uF8TMwT+Z GZcXHa8ALXw8tQlFdr/HpbW8It3xSet4ctqd40AsYwN4IKBA/IfsjMpFXA/iSltwB5/5pO LFrvy+m4zY+7A0RaQvggB8zIyuWhJrg= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by ams.source.kernel.org (Postfix) with ESMTP id 2DFF1B81199; Wed, 22 Nov 2023 09:44:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96852C433C8; Wed, 22 Nov 2023 09:43:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700646240; bh=vd1vSvagODzOx6kbpI7IvwSkS4eBsjmFRyLwRdBrVrA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=skgEBYvx/fAYU83PbKMGhZ+jFRWnelXbJMhtlbDO94lZzbLAQu2e6sHPZRgWHd+sx gtvmAgwjSpvlSEQjQzBmlxxsXWS82g6bxtvPaFkQ8pvd5rEGx1NUa6mmsajYrS2HXJ 9SUa7yYSQ4By+Yl/Qgm1N6yHb1EuBPq31sojdUVFxdN/L6m2Rc5/En1jfZfcN6fVd0 1Hue8SThE2M1637XnM8B3AjO9hFNOP+uQE1W0maFQM8JCIjJ7WlFtq4sCyHcLk/Da8 60C8qJmM22SVHPuFPEY+HS4Qp3f7l5E4nEP4L2Ac7hl6Qa7XDz7Xjm83GZP/ILzYcJ 5IDYaXeS3YwZg== From: Mark Brown Date: Wed, 22 Nov 2023 09:42:19 +0000 Subject: [PATCH v7 09/39] arm64/gcs: Provide put_user_gcs() MIME-Version: 1.0 Message-Id: <20231122-arm64-gcs-v7-9-201c483bd775@kernel.org> References: <20231122-arm64-gcs-v7-0-201c483bd775@kernel.org> In-Reply-To: <20231122-arm64-gcs-v7-0-201c483bd775@kernel.org> To: Catalin Marinas , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Kees Cook , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy Cc: "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Mark Brown X-Mailer: b4 0.13-dev-0438c X-Developer-Signature: v=1; a=openpgp-sha256; l=1037; i=broonie@kernel.org; h=from:subject:message-id; bh=vd1vSvagODzOx6kbpI7IvwSkS4eBsjmFRyLwRdBrVrA=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlXcz9ntfDGYRfW3xISuNKutZJXpSjiIRaViJ0k n4sUnukccCJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZV3M/QAKCRAk1otyXVSH 0N3bB/44FbabVeFeFQXmXvNQGbQr73EvxPiLmtFhVunzGXVexn0MqHJIPQxDC2ugEGWeKqK+7nz mHcpRXkSvzsDxa0SVk2G9hz7TrXNC6LMK87Ap6mUxpUx/sl71tnM08rKVQzi+iw4Ye5ZPtSiDWW L5diQOrA4wDNpimxkSurVohp7umfjFe/leUGxJGrezbj+MEWgxqb/endM8PgCOg4sdzQBljGFdX WMXW9ZlcwjjEOdBjomF3WAbeNIdpvDJQHFW9t9p9cLOLrxovGepwQ/qOzb7pt0bnZZ/ely3LOX/ 7IrP/ur/Ss2aXoZkMeS2okOUMjg3vSIb9e5S9aaS+RcHJC2B X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-Rspamd-Queue-Id: 68135A001B X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: 4uqy4m3u3o7uu7sfu47jfp6ubhjnf7kw X-HE-Tag: 1700646242-630863 X-HE-Meta: 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 s1IrckYE blCzBR8mt+xcA7dMTn92I3V9ZwLIandJDGAVQwarQiRRAdeYY8pXrGOCL27cQeQNUfI13Onf5yKC0JKX63CumR7tOqpdf1hxkLs7be+/+L0BaoU6a8tMod04RKRiDcMlABurEWKYf7afzEjDdLZVjer+ftzS5QbH5cI75N5AWHLytMI3fTBxsF6Pi45wbsq5kHOs4pWbNCcY4CKZN85JX6zPKHYNk0SkHJ6IoKRevgxOVw+9shrdjDn/fXxh+htUWK+NTqSD/ozYn455RztNq6XR19CA+xCom+FbkOm21K0S11l+XfqCiQxP1C/K3u29y8R8qEL+axjCybIvkMj6Ced0ACS+RgZKs0kBTEwzAL/bjB8NvweX4xcsrySZQGrOhnYo74OvQ0cVA6IM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: In order for EL1 to write to an EL0 GCS it must use the GCSSTTR instruction rather than a normal STTR. Provide a put_user_gcs() which does this. Signed-off-by: Mark Brown --- arch/arm64/include/asm/uaccess.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h index 22e10e79f56a..e118c3d772c8 100644 --- a/arch/arm64/include/asm/uaccess.h +++ b/arch/arm64/include/asm/uaccess.h @@ -445,6 +445,24 @@ static inline int gcssttr(unsigned long __user *addr, unsigned long val) return err; } +static inline void put_user_gcs(unsigned long val, unsigned long __user *addr, + int *err) +{ + int ret; + + if (!access_ok((char __user *)addr, sizeof(u64))) { + *err = -EFAULT; + return; + } + + uaccess_ttbr0_enable(); + ret = gcssttr(addr, val); + if (ret != 0) + *err = ret; + uaccess_ttbr0_disable(); +} + + #endif /* CONFIG_ARM64_GCS */ #endif /* __ASM_UACCESS_H */