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 X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45F69CA9EB6 for ; Wed, 23 Oct 2019 09:10:45 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1AD3B20659 for ; Wed, 23 Oct 2019 09:10:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1AD3B20659 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id DACFAB88; Wed, 23 Oct 2019 09:10:44 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 6269EB6C for ; Wed, 23 Oct 2019 09:10:43 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id B13E987B for ; Wed, 23 Oct 2019 09:10:42 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id DAB3A68BE1; Wed, 23 Oct 2019 11:10:37 +0200 (CEST) Date: Wed, 23 Oct 2019 11:10:37 +0200 From: "hch@lst.de" To: Wei Hu Subject: Re: [PATCH] video: hyperv: hyperv_fb: Use physical memory for fb on HyperV Gen 1 VMs. Message-ID: <20191023091037.GB21910@lst.de> References: <20191022110905.4032-1-weh@microsoft.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191022110905.4032-1-weh@microsoft.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: "sashal@kernel.org" , "info@metux.net" , "alexandre.belloni@bootlin.com" , Stephen Hemminger , "arnd@arndb.de" , "b.zolnierkie@samsung.com" , "sam@ravnborg.org" , Haiyang Zhang , "linux-fbdev@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" , "iommu@lists.linux-foundation.org" , "linux-hyperv@vger.kernel.org" , Michael Kelley , "dcui@microsoft.com" , "gregkh@linuxfoundation.org" , "mchehab+samsung@kernel.org" , KY Srinivasan , "robin.murphy@arm.com" , "hch@lst.de" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org PiArCXNlbGVjdCBETUFfQ01BCgpUaNGWcyBuZWVkcyB0byBiZQoKCXNlbGVjdCBETUFfQ01BIGlm IEhBVkVfRE1BX0NPTlRJR1VPVVMKCj4gKyNpbmNsdWRlIDxsaW51eC9kbWEtY29udGlndW91cy5o PgoKPiArCS8qIEFsbG9jYXRlIGZyb20gQ01BICovCj4gKwkvLyByZXF1ZXN0X3BhZ2VzID0gKHJl cXVlc3Rfc2l6ZSA+PiBQQUdFX1NISUZUKSArIDE7Cj4gKwlyZXF1ZXN0X3BhZ2VzID0gKHJvdW5k X3VwKHJlcXVlc3Rfc2l6ZSwgUEFHRV9TSVpFKSA+PiBQQUdFX1NISUZUKTsKPiArCXBhZ2UgPSBk bWFfYWxsb2NfZnJvbV9jb250aWd1b3VzKE5VTEwsIHJlcXVlc3RfcGFnZXMsIDAsIGZhbHNlKTsK CmRtYV9hbGxvY19mcm9tX2NvbnRpZ3VvdXMgaXMgYW4gaW50ZXJuYWwgaGVscGVyLCB5b3UgbXVz dCB1c2UgaXQKdGhyb3VnaCBkbWFfYWxsb2NfY29oZXJlbnQgYW5kIHBhc3MgYSBzdHJ1Y3QgZGV2 aWNlIHRvIHRoYXQgZnVuY3Rpb24uCgo+ICsJaWYgKCFnZW4ydm0pIHsKPiArCQlwZGV2ID0gcGNp X2dldF9kZXZpY2UoUENJX1ZFTkRPUl9JRF9NSUNST1NPRlQsCj4gKwkJCVBDSV9ERVZJQ0VfSURf SFlQRVJWX1ZJREVPLCBOVUxMKTsKPiArCQlpZiAoIXBkZXYpIHsKPiArCQkJcHJfZXJyKCJVbmFi bGUgdG8gZmluZCBQQ0kgSHlwZXItViB2aWRlb1xuIik7Cj4gKwkJCXJldHVybiAtRU5PREVWOwo+ ICsJCX0KPiArCX0KClBsZWFzZSBhY3R1YWxseSBpbXBsZW1lbnQgYSBwY2lfZHJpdmVyIGluc3Rl YWQgb2YgaGFja3MgbGlrZSB0aGlzLgoKPiArCQkJcGFyLT5uZWVkX2RvY29weSA9IGZhbHNlOwo+ ICsJCQlnb3RvIGdldG1lbTE7Cj4gKwkJfSBlbHNlIHsKCk5vIG5lZWQgZm9yIGFuIGVsc2UgYWZ0 ZXIgYSBnb3RvLgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0 dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2lvbW11