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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE192D0D785 for ; Fri, 11 Oct 2024 12:55:14 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6F09E6B00A7; Fri, 11 Oct 2024 08:55:14 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 67CC36B00A8; Fri, 11 Oct 2024 08:55:14 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 519D36B00A9; Fri, 11 Oct 2024 08:55:14 -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 2D7196B00A7 for ; Fri, 11 Oct 2024 08:55:14 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id C5A55C1129 for ; Fri, 11 Oct 2024 12:55:08 +0000 (UTC) X-FDA: 82661316864.06.AB04063 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf26.hostedemail.com (Postfix) with ESMTP id 0AC0C140004 for ; Fri, 11 Oct 2024 12:55:09 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=bxKmURlS; spf=pass (imf26.hostedemail.com: domain of maz@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=maz@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1728651241; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=4JqzbQCDUcSie1mFRpAXOYgyBDCXqFdhE21brHSasP4=; b=fcV8dKL15lUGVkLA2DZ5XzTt0CvrtZkF58o9qyo2nfvMqn80467Cxn46qmvFl31NYcp6VW /60w8YiH4OhG803clNEBi9k4qvzeWP9EpipHtYMxG+4zZ7ax2F4gp8DGQzpOOeABax5nVX vMZkn1POER5fhh2EMuc7v6e34rjJrcI= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=bxKmURlS; spf=pass (imf26.hostedemail.com: domain of maz@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=maz@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1728651241; a=rsa-sha256; cv=none; b=goT4VP9WbEoAOCkOIJ9ZGlnSyqNHME15m/HYAiohMkFeUOofruzbIFnDIGhhmVdPUqfpfn QNJ+px6o3thI7IMfIBP09NbsYjgo2DTlyZRQ+uU7nraltrv5fpXaNt+4tIjYyFGP7J8S2c hCiQyWftrhoHSijvt/mWbK92OS6hhKA= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 630FD5C5D11; Fri, 11 Oct 2024 12:55:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 253F4C4CEC3; Fri, 11 Oct 2024 12:55:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728651310; bh=XT4qnBUKa3a1vSK5tJQUDSalL8lZA3BStEeYDOxhiyE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=bxKmURlSi26SJe+QK4PGRX/Ogihvq7QIVMr0xUkNhvMtAINqZYYntZBEmNvBhXPzx xaQCgdyiANh8t3XzU1lUElo5+68IFooOi7w967UeZ4uBwr6loXlVb5zk3DL1pKqXt6 HBAY4AsSFxH7PoAyDc6zDcqNdJdwwUxb24R7cB1INpTJWpCOEqUw6OP69pfvqNeZbC Vp88tRv635qLdAkY5kchac2l6VKVhUPnICZg2BkQ2S5Mw0CUWfwf+IM4MLzHLqZKMT pfBsODaZQhvykSctTNHB5AQS0tLN6OjiebakwN3EDPLMXixs4xCDyUOUGpJp+oxxoE dWSEZjuQ+PXGA== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1szFAg-002Y12-L7; Fri, 11 Oct 2024 13:55:06 +0100 Date: Fri, 11 Oct 2024 13:55:05 +0100 Message-ID: <86h69i6bpy.wl-maz@kernel.org> From: Marc Zyngier To: Catalin Marinas Cc: Nathan Chancellor , Mark Brown , Will Deacon , Jonathan Corbet , Andrew Morton , 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 , David Spickett , 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 Subject: Re: [PATCH v13 11/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1 In-Reply-To: References: <20241001-arm64-gcs-v13-0-222b78d87eee@kernel.org> <20241001-arm64-gcs-v13-11-222b78d87eee@kernel.org> <20241009204903.GA3353168@thelio-3990X> <86msjc56mi.wl-maz@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.4 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: catalin.marinas@arm.com, nathan@kernel.org, broonie@kernel.org, will@kernel.org, corbet@lwn.net, akpm@linux-foundation.org, oliver.upton@linux.dev, james.morse@arm.com, suzuki.poulose@arm.com, arnd@arndb.de, oleg@redhat.com, ebiederm@xmission.com, shuah@kernel.org, rick.p.edgecombe@intel.com, debug@rivosinc.com, ardb@kernel.org, Szabolcs.Nagy@arm.com, kees@kernel.org, hjl.tools@gmail.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, fweimer@redhat.com, brauner@kernel.org, thiago.bauermann@linaro.org, ross.burton@arm.com, david.spickett@arm.com, yury.khrustalev@arm.com, wilco.dijkstra@arm.com, 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 X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: 0AC0C140004 X-Stat-Signature: zthrzmhh5895oagprjptzc6j6i71x7w4 X-HE-Tag: 1728651309-268364 X-HE-Meta: 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 U8G7lFxe K9sakLISEncyUmzRsIazfA9xTkNgzqVE5Th2vUKL3p0RxmFxpNFgfswU27nw4VAsgfwj2n1Mr/zb0IeRZ0VbfNkMYoDOcSxk8wgqbR0vDbznnsZUaSTGnL9JGSLDACt/nciroc8ruC/UQUfwDKYGCpjfJKiZcRPv/MWbzQRBPfz74ktR14EqfGVNtslYZWJZzJsaLv1U2KNJebf544GCvP1m20ViilnQfyepfY8eds+BWsBIBcyUT+Zvfj9NHmmT/pYvcZGY85Ujj2jC6SgwJJ5asbeo9/SMDvQ4dk7uO7BXjEAtKQxaecfRiumrTfHEsU8UhoQY0p4j+6PhG1c1cDN+jtOrk1Aqv13cgYFhZAHqZd0hrMNf4OZmECUZWNe+qdCY8 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: On Thu, 10 Oct 2024 18:16:52 +0100, Catalin Marinas wrote: > > On Thu, Oct 10, 2024 at 04:18:13PM +0100, Marc Zyngier wrote: > > From 20c98d2647c11db1e40768f92c5998ff5d764a3a Mon Sep 17 00:00:00 2001 > > From: Marc Zyngier > > Date: Thu, 10 Oct 2024 16:13:26 +0100 > > Subject: [PATCH] KVM: arm64: Shave a few bytes from the EL2 idmap code > > > > Our idmap is becoming too big, to the point where it doesn't fit in > > a 4kB page anymore. > > > > There are some low-hanging fruits though, such as the el2_init_state > > horror that is expanded 3 times in the kernel. Let's at least limit > > ourselves to two copies, which makes the kernel link again. > > > > At some point, we'll have to have a better way of doing this. > > > > Reported-by: Nathan Chancellor > > Signed-off-by: Marc Zyngier > > Link: https://lore.kernel.org/r/20241009204903.GA3353168@thelio-3990X > > Thanks Marc for the quick fix. It looks fine to me, it will keep the > linker quiet for a while. I pushed it to arm64 for-kernelci for the time > being, see if anything falls apart. I'll apply it properly once it gets > a bit more testing. Works for me. Bu if that helps, I can also queue it as a KVM fix for 6.12, leaving the GCS branch unencumbered. Just let me know. M. -- Without deviation from the norm, progress is not possible.