From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54357) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZhdK4-0002Cd-2y for qemu-devel@nongnu.org; Thu, 01 Oct 2015 08:50:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZhdJy-0002mU-Dm for qemu-devel@nongnu.org; Thu, 01 Oct 2015 08:50:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40393) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZhdJy-0002mM-7O for qemu-devel@nongnu.org; Thu, 01 Oct 2015 08:50:50 -0400 References: <1443389342-2186-1-git-send-email-somlo@cmu.edu> <1443389342-2186-5-git-send-email-somlo@cmu.edu> <560A6A90.3070807@redhat.com> <20150929182613.GY2080@HEDWIG.INI.CMU.EDU> <560BB794.9010600@redhat.com> <20151001122242.GJ23832@HEDWIG.INI.CMU.EDU> <560D28A1.4040706@redhat.com> From: Laszlo Ersek Message-ID: <560D2C25.2080602@redhat.com> Date: Thu, 1 Oct 2015 14:50:45 +0200 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v4 4/5] acpi: arm: add fw_cfg device node to dsdt List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell Cc: Andrew Jones , Matt Fleming , Eduardo Habkost , "Michael S. Tsirkin" , "Gabriel L. Somlo" , Ard Biesheuvel , QEMU Developers , Leif Lindholm , Paolo Bonzini , Gerd Hoffmann , Shannon Zhao , Igor Mammedov , =?UTF-8?Q?Marc_Mar=c3=ad?= , Kevin OConnor , Richard Henderson On 10/01/15 14:39, Peter Maydell wrote: > On 1 October 2015 at 13:35, Laszlo Ersek wrote: >> On 10/01/15 14:22, Gabriel L. Somlo wrote: >>> I'm noticing that even on 32-bit arm there are ACPI tables generated and >>> inserted into fw_cfg, so is there any reason OTHER than lack of firmware >>> support for ACPI not being supported on 32-bit arm ? > > This is mostly just that we didn't bother to suppress them for > 32-bit boots, though they're useless there. > >> I think Ard was speaking about the guest kernel (his pointer certainly >> looks like a kernel repo). With regard to firmware, edk2's >> ArmVirtPkg/ArmVirtQemu.dsc builds just fine for 32-bit ARM guests. >> >> So, it's not a QEMU or guest firmware problem; I think it's a guest >> kernel problem. > > Only if you think ACPI support is a requirement. Oh, certainly. I was speaking with that working assumption (based on how Gabriel asked his question); I wasn't trying to state that assumption as a fact. Sorry about the misunderstanding. Thanks Laszlo > It's not for 32-bit; > there's no compelling reason to implement it there. > > thanks > -- PMM >