From patchwork Thu Aug 22 01:15:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13772318 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 6918AC52D6F for ; Thu, 22 Aug 2024 01:17:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F10D06B017B; Wed, 21 Aug 2024 21:17:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EBEA06B017C; Wed, 21 Aug 2024 21:17:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D86FB6B017D; Wed, 21 Aug 2024 21:17:54 -0400 (EDT) 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 B4CEF6B017B for ; Wed, 21 Aug 2024 21:17:54 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 5B429A9999 for ; Thu, 22 Aug 2024 01:17:54 +0000 (UTC) X-FDA: 82478119668.20.4F0EE52 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf13.hostedemail.com (Postfix) with ESMTP id 9350920015 for ; Thu, 22 Aug 2024 01:17:52 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=E97AXxJy; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf13.hostedemail.com: domain of broonie@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=broonie@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1724289413; a=rsa-sha256; cv=none; b=gSiyvMjsF3DV4LgKWdrOBpZcHrmXpU4AS7ibINMjAuDj0Wr9q7/LgyV6W//DrXR4BhPXRA 0MXWjJMUmwJLsD7uLSPvdpUrXyeYZPv5RQ0ZRqC5LfYIYLfJTYMjQ4AMZVhE4OIN6xqluA l2lsMTBIRfT5EaItmLJ0Ffz40c8OKEM= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=E97AXxJy; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf13.hostedemail.com: domain of broonie@kernel.org designates 139.178.84.217 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=1724289413; 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=mVmkXPANuj1zmFdxUYAQ0m1q3qhbhMjfYc3dEWQndJg=; b=5d8FXhM9StS0E+1n729TXXLvSdrsyHjsOxhCvaJZadBzNxoaUiEA3pYtD83Fp9pTy2t5QZ 2Gr82jX1m6aTOQ7Sr3KyvA9zHOkNZpNJpukDpIwKLm+rG8Pq7qdhIJ41xxAe9jJD8iJ9hi CQxV7W1DHRkW+n4gp850TkGVeG68yuI= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id BE842611D6; Thu, 22 Aug 2024 01:17:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48AD9C32781; Thu, 22 Aug 2024 01:17:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724289471; bh=0WRESyvBFvhlHiGA4Y8lOQoOddezzHHj49JAXCWn5As=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=E97AXxJyaLvA4eWkGc/srnZc1i0qVSJTBX+sUDHdNmRoGg03x0HFQ0Ma+lm8HaScc Duhxzy20BDn4wqnOjRbwWBgCYTz4T/8RKkYrgjUzHGXtwd7KzLvitF7UHI5r/KgwBc D3Xj7aLSG9QI8DbtgXVwjDCG4RVVA/dfn33LCkbnC6u2lMNcNiDhFsHFEZJh38yt20 wZfoyvPjNo/c22X5tqMwJ9SzQ2ScyDn1mnrstbZFjIM838vHpOIcUtHrDSdOhjD+1W pd1vcED/CnO9KgVwk4ZIjzZyBONBoqPTyeOdWydoAfX4uOic+6BiQsIkg8VIPNOGTv Js2v5T0IkyuBA== From: Mark Brown Date: Thu, 22 Aug 2024 02:15:12 +0100 Subject: [PATCH v11 09/39] arm64/gcs: Provide put_user_gcs() MIME-Version: 1.0 Message-Id: <20240822-arm64-gcs-v11-9-41b81947ecb5@kernel.org> References: <20240822-arm64-gcs-v11-0-41b81947ecb5@kernel.org> In-Reply-To: <20240822-arm64-gcs-v11-0-41b81947ecb5@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 , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , Kees Cook Cc: "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , Ross Burton , Yury Khrustalev , Wilco Dijkstra , 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 0.15-dev-37811 X-Developer-Signature: v=1; a=openpgp-sha256; l=1159; i=broonie@kernel.org; h=from:subject:message-id; bh=0WRESyvBFvhlHiGA4Y8lOQoOddezzHHj49JAXCWn5As=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBmxpEqxiyXnYx2N/sii4yn4wPWEiex3gccD8helpbj Tm7s6tOJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZsaRKgAKCRAk1otyXVSH0C9WB/ wN8Eqbg+t1T6Ozlrs7p4tljp5Q6/NNlBRl+CXbZ4BJz0pmv0aBbMKEf69fLa7ToBqPn4l2Ce1sdaiT KJyqgPAxHOH+75KzzM286S7M2f2pY2ZF+/PKd+ydSP3j/w4XjWv90XxSZzLEMsCbrndYbD2524082z x4+8Oq9sWcKTTu3gUmWcST86jfaJdgluokx7H84dj00F0VDxn3PFfHnO3eho5joU49GfxI7IfHh0pV 8nKEJXul/ofTART5hQHANESLXtY9P/ArrqfmrF7QyFzUpEFmlGciorgGHLwxf4Q3gqtOmzRaJ5GPMi fHNdmoz6JFKxZkDwoEy87pw3AtZnr+ X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-Rspamd-Queue-Id: 9350920015 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: 5tj6f5xfrdsjidzfwzhk3kangi4aihxr X-HE-Tag: 1724289472-262755 X-HE-Meta: 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 LBwIqhFE 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 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. Reviewed-by: Thiago Jung Bauermann Reviewed-by: Catalin Marinas 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 6aba10e38d1c..ecdd47cf1d01 100644 --- a/arch/arm64/include/asm/uaccess.h +++ b/arch/arm64/include/asm/uaccess.h @@ -522,6 +522,24 @@ 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 */