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 ABDF5C79F89 for ; Mon, 7 Sep 2026 08:57:00 +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:Content-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID: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=N6bWIpFfXhqGihNnzoE3exOZDCPPpubbizpznVgNBKk=; b=a9yxd+SPbT772/cM8bdTRIZBJD myUmr+DuSRukaloaKcYtfVl3wW8muVyALO9DvhGW6dqX2kUPsDlTghL0B9sOPCJs8al5JXyiZqgXP Z+cp4wFSBiDeSBSrqXaFTirYnUdOnWuqvFOq0zYrfZUJpMKFnyoJEjfvnl4c2Z0/LfviaJchsjNj+ EpzgKpc3NSjxKix6TbFEDPtoOwOOGECqffxthC8Csh+UYTkiK4Vqgin5wIfUKcoJULAra1I14YbvD 7RB8ehRECoTAVZKg4/SnzWjLUQLl4mhln+gd5nLOBX2IFR3lzs9g+07TVRRgU8e/HcRyo+2k+y1le bAOebsmQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3V9o-00000006KFG-2n09; Mon, 07 Sep 2026 08:56:52 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3V9n-00000006KF2-1xYs for linux-arm-kernel@lists.infradead.org; Mon, 07 Sep 2026 08:56:51 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id A4C0C601F9; Mon, 7 Sep 2026 08:56:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D52E1F00A3A; Mon, 7 Sep 2026 08:56:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788771410; bh=N6bWIpFfXhqGihNnzoE3exOZDCPPpubbizpznVgNBKk=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=MvheHASsRLl5BGpuNyuoniZlretbpywNtzuA3qmGwLnux9kgn5bWsMIoGp/Cn2/Ut ZHoehtzgHDUyW7dlL1CmuYGToBEBlhThscOcYYJzDv4+kwQdY7CuG0aDcbheZsxCDn lKQl2yXhf2kk+gJwgMOfV+S4N9h+VNaab9saVXwxEd2vF7jB2IKl1IPz+1vwNqbYnL vVvIo3C3TTIVC5agFcs+vDIwc3q24TyTt3EBG6vQ0EtMSNgqrSpzuVOzKm/bBxYifD J0a8AUYR7Fq4DigmXmMx1ZC6TK2RjXVHcoRz2ku1ROq6zBD2jVqjVyXPvuw4SmOev+ WdmxLDM5uRHbw== 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 4.98.2) (envelope-from ) id 1x3V9k-00000005fG9-1bGF; Mon, 07 Sep 2026 08:56:48 +0000 Date: Mon, 07 Sep 2026 09:56:48 +0100 Message-ID: <86ik4h4ey7.wl-maz@kernel.org> From: Marc Zyngier To: Adrian Ng Ho Yin Cc: tglx@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5] irqchip/gic-v3: Add Altera SoCFPGA Agilex5 GIC600 DMA32 erratum workaround In-Reply-To: References: 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/30.1 (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: adrian.ho.yin.ng@altera.com, tglx@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false 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 Mon, 07 Sep 2026 09:22:59 +0100, Adrian Ng Ho Yin wrote: > > Agilex5 integrates GIC600 with an ACE-lite interface limited to a 32-bit > address bus, so the ITS can only access the first 4 GB of physical address > space. Register intel,socfpga-agilex5 on the existing > dma_32bit_impaired_platforms list so ITS allocations use GFP_DMA32. > > The workaround is guarded by ALTERA_ERRATUM_AGILEX5_2_1_23, which is > selected by ARCH_INTEL_SOCFPGA as all Agilex5 devices are affected. > > This limitation is documented as Agilex 5 ES Device Errata 2.1.23 (825514). > > Signed-off-by: Adrian Ng Ho Yin Reviewed-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.