From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 649631C07DB; Tue, 15 Oct 2024 13:05:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728997546; cv=none; b=usNFuBUxBrV9m9Ek6i+H5bEIlw3FZOMH/LbJU6KdotJPmf1+brzskWY5OvZQFDV1WWyCqHG6gj02EsA8QRqcs85DCRm0y6A0wqOZ+GTBXECFouItDJIjwyYXSPUOLZtfNU7hpzoT+V+TZoBWmdkiEor1deJZOf3rtv5oTf5NQ+s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728997546; c=relaxed/simple; bh=gK4QnrS2Sm+VO7VdVB+g+vOjiZv1ni06CPOZFvH/IkI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Ef+2CogbkcsYs0XuxO5/HeKmVSFxr95HKyJr7G1NeiS6x43uY0Kz0qfdnBqIKsMoixmIs1hXJlASq8j85cJvNQzZ79NMj5PuNpJ1GXLMgSMRPi3vWCRj7cokcyfVysRjuIZN806NK3o4e1I3lduvgqwQH2MliagmpdMSVi7RVmc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 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> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86msjc56mi.wl-maz@kernel.org> 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