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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 2A180C4332F for ; Tue, 18 Oct 2022 14:56:01 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6805710E8D1; Tue, 18 Oct 2022 14:56:00 +0000 (UTC) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by gabe.freedesktop.org (Postfix) with ESMTPS id C047F10E8AF; Tue, 18 Oct 2022 14:55:54 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id BD2FD68C4E; Tue, 18 Oct 2022 16:55:50 +0200 (CEST) Date: Tue, 18 Oct 2022 16:55:50 +0200 From: Christoph Hellwig To: Juergen Gross Message-ID: <20221018145550.GA21066@lst.de> References: <20221018082413.GA25785@lst.de> <20221018110243.GA4655@lst.de> <20221018143320.GA19106@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Subject: Re: [Intel-gfx] i915 "GPU HANG", bisected to a2daa27c0c61 "swiotlb: simplify swiotlb_max_segment" X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefano Stabellini , regressions@lists.linux.dev, dri-devel@lists.freedesktop.org, Anshuman Khandual , intel-gfx@lists.freedesktop.org, Konrad Rzeszutek Wilk , Marek =?iso-8859-1?Q?Marczykowski-G=F3recki?= , Oleksandr Tyshchenko , iommu@lists.linux.dev, Matthew Auld , Jan Beulich , Rodrigo Vivi , xen-devel@lists.xenproject.org, Christoph Hellwig Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Tue, Oct 18, 2022 at 04:53:50PM +0200, Juergen Gross wrote: >> If we don't need the IS_ENABLED is not needed I'm all for dropping it. >> But unless I misread the code, on arm/arm64 even PV guests are 1:1 >> mapped so that all Linux physically contigous memory also is Xen >> contigous, so we don't need the hack. > > There are no PV guests on arm/arm64. Ok, that's the part I was missing. In that case we should be fine without the IS_ENABLED indeed.