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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 51EA8C531DC for ; Fri, 16 Aug 2024 11:13:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/nEWyGBCcIaPNZDAgRF6MJ0N570eTs8LRj9bNQtJDbE=; b=HRhsun7bOu6EPAY6BXuWWaadKh ZY/akNxC1RCavGPH8505jsYzxlSHy7dG2EIRHhnsAvcY54owyeoYAzUnTIewZkUbs/iCDz/jM92GM oDAXcOM06AUM4gawVSK591xc/MXuw905ZanWhKj3o5OUhX34XjqQ/CdMP9pKtdvo5at78i7bhdugA Kav8OgQP5Y6duN1y1vRhfu8upVD1MEfpLy3hjyBmKHf+w13Ajb8Rss9Ov7GMbuKlCv/8QDL3Kk/qj gH2ZTXGggYTcMBLLus2nZWd6KMoO97z0n/jPsJ4/lhAQwvHm5DroGIdoh59vD69TeSj026Xs/CgrA 6OQS8GEA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1seutl-0000000Cj7D-0rQa; Fri, 16 Aug 2024 11:13:37 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1seut5-0000000CiyF-2lWt; Fri, 16 Aug 2024 11:12:57 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 009BA61DF8; Fri, 16 Aug 2024 11:12:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5B1F3C4AF0C; Fri, 16 Aug 2024 11:12:49 +0000 (UTC) Date: Fri, 16 Aug 2024 12:12:47 +0100 From: Catalin Marinas To: Mark Brown Cc: 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 , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , Ross Burton , 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 Subject: Re: [PATCH v10 08/40] arm64/gcs: Provide put_user_gcs() Message-ID: References: <20240801-arm64-gcs-v10-0-699e2bd2190b@kernel.org> <20240801-arm64-gcs-v10-8-699e2bd2190b@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240801-arm64-gcs-v10-8-699e2bd2190b@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240816_041255_759792_656A71F8 X-CRM114-Status: UNSURE ( 8.72 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Aug 01, 2024 at 01:06:35PM +0100, Mark Brown wrote: > 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 > Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas