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[209.51.188.17]) by mx.google.com with ESMTPS id b20-20020a05622a021400b003ef3cea5b61si9056562qtx.764.2023.05.15.03.04.45 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 15 May 2023 03:04:45 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=MgIa2rQX; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pyV49-0001BY-Le; Mon, 15 May 2023 06:04:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pyV3y-00019G-TS for qemu-arm@nongnu.org; Mon, 15 May 2023 06:04:20 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pyV3w-0000VL-Sz for qemu-arm@nongnu.org; Mon, 15 May 2023 06:04:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1684145056; h=from:from:reply-to: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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ytu6mNbKiHMRjxb5/HCxd8UnrRmRjwtii8S1gvg+KXY=; b=MgIa2rQX4vP0F6nS/wUuLY4cp+R4zgYc5O/xRdCYkt6sed2WAqpGXI8Hu2HeSKpI2UsXGd M1uFHwpOo8YCRyKtTVjRI6/twbw6WOEdk5791b1tVTJxloLg94CRUpzvGe0kAxTbbr6Klk DKer+HesjHIPE/uzVY/e9TTW9LBNAMI= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-561-6OUWgs3bN06D7NJZwwlGvQ-1; Mon, 15 May 2023 06:04:14 -0400 X-MC-Unique: 6OUWgs3bN06D7NJZwwlGvQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E0EF43814948; Mon, 15 May 2023 10:04:13 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.48]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5D5B82166B26; Mon, 15 May 2023 10:03:55 +0000 (UTC) Date: Mon, 15 May 2023 11:03:47 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Peter Maydell Cc: Hao Zeng , pbonzini@redhat.com, qemu-arm@nongnu.org, qemu-devel@nongnu.org, Gerd Hoffmann Subject: Re: [PATCH V2] hw/arm: enable qxl for aarch64 Message-ID: References: <20230512093108.1180726-1-zenghao@kylinos.cn> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/2.2.9 (2022-11-12) X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org X-TUID: kSuB3SA82n2G On Mon, May 15, 2023 at 10:59:16AM +0100, Peter Maydell wrote: > On Mon, 15 May 2023 at 10:57, Hao Zeng wrote: > > > > > > On Mon, 2023-05-15 at 09:52 +0100, Daniel P. Berrangé wrote: > > > Overall, IMHO, we should keep QXL restricted to as few build > > > scenarios > > > as possible. Given the status of SPICE, possibly we'll even want to > > > deprecate it on x86 eventually, not add it to more arches. > > > > > > What are you seeing as the compelling use case that requires QXL to > > > exist on aarch64 ? > > > Thank you for your answer, it made me learn a lot. No use case, just > > outside customer feedback on the ARM architecture qxl use has problems, > > I compiled the community qemu, found that the default does not support > > qxl display, so the submitted enablement. > > I agree with you, please ignore this commit. > > I would still like to know why QXL isn't automatically > enabled like every other PCI device... Historical reasons ? Originally both QXL and SPICE were x86 only and SPICE was broken on big endian if you tried to build it. The orignal QXL code in QEMU had a hard dependancy on SPICE until an enhancement made it work with other backends. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|