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 7C46AD1812E for ; Mon, 14 Oct 2024 16:31:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 12FE56B0085; Mon, 14 Oct 2024 12:31:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0DFA96B008A; Mon, 14 Oct 2024 12:31:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E9B556B008C; Mon, 14 Oct 2024 12:31:58 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id C904D6B0085 for ; Mon, 14 Oct 2024 12:31:58 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 7942C141027 for ; Mon, 14 Oct 2024 16:31:50 +0000 (UTC) X-FDA: 82672749264.07.0706740 Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by imf25.hostedemail.com (Postfix) with ESMTP id 87A52A0013 for ; Mon, 14 Oct 2024 16:31:52 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=none; spf=pass (imf25.hostedemail.com: domain of cmarinas@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1728923374; 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=521ioEuhMcMRzRU63l5RocAmkjYhFGywTiCYYMus7R0=; b=X2ls8kImsn7VOG6DDObT+RsQ93dPGzAhp8RQo9XAqL79arob4qNt8YBBPHWKB1Ee+Bqpy8 GS9hpHe71c7xS1CTkeeox5ZnJvOPqyVNjSyllvEMwgUxzaqRBSZWQkZwgvy1/TWTbDMnP1 B/l6bWrQF4B432v0AKraecDLD3hvrY4= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1728923374; a=rsa-sha256; cv=none; b=MRp9byX1w4qTCNxSFqXm1QnNlLKltkz2ETL2o9syNJLSNJvWmArnPBNFO38Xzr8osoLzEX kiTxXc9NxhyVPozo7Eupr1ThIVAJ2UToSz5XYMFTq2UtCq1Ll7dZLfcZ5Vvi1Iu/hLVpKh rz0kjzutpqbuySu3xVgcvPB6ZAlzB1g= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=none; spf=pass (imf25.hostedemail.com: domain of cmarinas@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id F1C62A42582; Mon, 14 Oct 2024 16:31:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92EACC4CEC3; Mon, 14 Oct 2024 16:31:49 +0000 (UTC) Date: Mon, 14 Oct 2024 17:31:47 +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> <86h69i6bpy.wl-maz@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86h69i6bpy.wl-maz@kernel.org> X-Stat-Signature: 8aky68xw6y7rdofi8djqocrp8z6jr7ap X-Rspamd-Queue-Id: 87A52A0013 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1728923512-381176 X-HE-Meta: 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 f5utJHhM 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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 Fri, Oct 11, 2024 at 01:55:05PM +0100, Marc Zyngier wrote: > 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. But if that helps, I can also queue it as a KVM fix for > 6.12, leaving the GCS branch unencumbered. Just let me know. That would help, thanks. The for-kernelci branch merges the latest mainline rc anyway, so it will no longer blow up allmodconfig tests. -- Catalin