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 71E11D216A2 for ; Tue, 15 Oct 2024 13:05:52 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 059E46B0089; Tue, 15 Oct 2024 09:05:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F25956B008A; Tue, 15 Oct 2024 09:05:51 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DC62E6B008C; Tue, 15 Oct 2024 09:05:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id C1F6D6B0089 for ; Tue, 15 Oct 2024 09:05:51 -0400 (EDT) Received: from smtpin23.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 9806E1615E0 for ; Tue, 15 Oct 2024 13:05:39 +0000 (UTC) X-FDA: 82675858608.23.7B62C56 Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by imf16.hostedemail.com (Postfix) with ESMTP id 7925018000B for ; Tue, 15 Oct 2024 13:05:40 +0000 (UTC) Authentication-Results: imf16.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf16.hostedemail.com: domain of cmarinas@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=cmarinas@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1728997442; a=rsa-sha256; cv=none; b=WCdgOWjZqf9sSl0Th2jxV9/4TibGHEF2r8Tc+Hp5yFeuOZfxApWygkS8FzUxIDx+92Z4Mr wUWC8lRz6EoKDj3yseGE3BsG8bB8ignJ/7tHSF6vmS3EheoGwg7ZfkPTzEwzUj2YCUBXX8 AIpXapbaYMfdyJTOD5N+eETYk1Ru4I4= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf16.hostedemail.com: domain of cmarinas@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=cmarinas@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1728997442; 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; bh=L2hEsBo47qHlWTIilwSzxGpClP02tu10HzOYj4aQgjI=; b=0RRoGSJ3g25xO1n6TGbj9E42kGae3JiXdUi7hlwkOMCeOh3FIZA2VyiN+Qcr0kmAnCyhby BGQ0BY+SDlOdyXWhD+z3XRKfCpGOaEltj440owO0SgP9VoP/jLQGjZ+o4lWa7y81qd8gsc hXXe6+G4VwJ82azGFznyhYz+H40+5v8= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 81C4EA40F29; Tue, 15 Oct 2024 13:05:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25155C4CEC6; Tue, 15 Oct 2024 13:05:39 +0000 (UTC) Date: Tue, 15 Oct 2024 14:05:37 +0100 From: Catalin Marinas To: Marc Zyngier 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 Message-ID: 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86msjc56mi.wl-maz@kernel.org> X-Rspamd-Queue-Id: 7925018000B X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: ycmcp7qrnrjbe4sdnw4hheww4o3jgf3p X-HE-Tag: 1728997540-102383 X-HE-Meta: U2FsdGVkX19jAicYWU15a2cqPqJRPa97Pk+x4etv6mAqxxw0y5+21l13T/6cMW8Hy8JSmYBRJFwzyCeIxJ2xRNv4TAO1MoCn2js/bVJmfOjZ8DfQe9yHAIsHZ6bzcjFLYDP5LKLpsn+HVhkT3KE1e/ZNCnQd/ttwxpwKx3QnwEjz/KE0EEFr+wCqfFnEpQFsOBWtSN3pa8lI13j6SBrT3etnJLOkpjHhPcFsW3y1ilCR+7iJHY46SGWWjD7IA98SNtG86HVfUYrWq3l7STNufKLLMiYkbLIjJLp1mgXtxj930jFwpNsmPX14n8XL3nWIgRgeQ0z5KUuOpmoUXx/JhhQqV4rDbYhOi1VTCVx9oFNN7qWdLqeYNAyVOReKUUu+fCcYwd4D53Had2rDSM1UoxMDSG3w2aIzKuCzzk3akKcsV8RvbjSjSiQ/UbxynhR/v9HyLuUekTKeuIfffLf1Cnv24feoBG/ehvFPmVjLr8pOIHiONOZLwQyyYzqH4S83YvJookkoT8nqdR3EC+CRqFhVVOW/UpnxS4zOEeFif9j8yTgX5l1kpFBXFWGJkY1YxMMRz7QfdNf9zGGHBBITnzg65YP0aCHbTJquE3yehXPOWu/9tYvFmZsKBo1lzI2zrpkXS8V9AFmUFYfT9dD5O56yaU+E4Q2e+YGC85ax325yAEXztCXuXU+YoSdNSyUhzEUoPsMuFK+XonoVGlx+zb8YljXltJyAkPOPJqs0i2Y/qdm3aF074ouO6debdfzV21ebWoswy5S2oGMwGbMShJK/QUgE0xTGQZvOvvRIJY9/ZcsQJdWU24Y1scdg/npUeJZlskrVd1LfkuObQGwYSzjtEYe5eCZSjp2FbY7dAQ5FvgfW13CSpc5ukDDmOIaozSo0LtY+xx5SVS5zOw7ulj+5h+a/razNri6g6tqwo+lavBne1RSnSMp4a5Rt5VYIoYhsWRh1iLRZPJS4Qzn xlkpAaGf 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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: 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 Reviewed-by: Catalin Marinas Tested-by: Catalin Marinas Please merge it as a KVM fix if you can. Thanks. -- Catalin