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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 B3912CAC59A for ; Wed, 17 Sep 2025 16:41:23 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uyvCz-0006kA-CM; Wed, 17 Sep 2025 12:40:42 -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 1uyvAF-00035d-Ba for qemu-devel@nongnu.org; Wed, 17 Sep 2025 12:37:51 -0400 Received: from [185.176.79.56] (helo=frasgout.his.huawei.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uyvAD-00050k-AI for qemu-devel@nongnu.org; Wed, 17 Sep 2025 12:37:50 -0400 Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4cRkpb429kz6L5Yj; Thu, 18 Sep 2025 00:33:11 +0800 (CST) Received: from frapeml500008.china.huawei.com (unknown [7.182.85.71]) by mail.maildlp.com (Postfix) with ESMTPS id 65B5B1402EA; Thu, 18 Sep 2025 00:37:44 +0800 (CST) Received: from localhost (10.203.177.15) by frapeml500008.china.huawei.com (7.182.85.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Wed, 17 Sep 2025 18:37:43 +0200 Date: Wed, 17 Sep 2025 17:37:42 +0100 To: wangyuquan CC: , , , , , , , , , , , , Subject: Re: [RFC QEMU PATCH v4 2/2] pci-host/cxl: Support creation of a new CXL Host Bridge Message-ID: <20250917173742.000078cc@huawei.com> In-Reply-To: <20250807105910.240070-3-wangyuquan1236@phytium.com.cn> References: <20250807105910.240070-1-wangyuquan1236@phytium.com.cn> <20250807105910.240070-3-wangyuquan1236@phytium.com.cn> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.15] X-ClientProxiedBy: lhrpeml100005.china.huawei.com (7.191.160.25) To frapeml500008.china.huawei.com (7.182.85.71) X-Host-Lookup-Failed: Reverse DNS lookup failed for 185.176.79.56 (deferred) Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jonathan Cameron From: Jonathan Cameron via Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Thu, 7 Aug 2025 18:59:10 +0800 wangyuquan wrote: > From: Yuquan Wang > > Define a new CXL host bridge type (TYPE_CXL_HOST). This is an > independent CXL host bridge which combined GPEX features (ECAM, MMIO > windows and irq) and CXL Host Bridge Component Registers (CHBCR). > > The root bus path of CXL_HOST is "0001:00", that would not affect the > original PCIe host topology on some platforms. In the previous, the > pxb-cxl-host with any CXL root ports and CXL endpoint devices would > share the resources (like BDF, MMIO space) of the original pcie > domain, but it would cause some platforms like sbsa-ref are unable to > support the original number of PCIe devices. The new type provides a > solution to resolve the problem. > > Signed-off-by: Yuquan Wang Likewise, this looks fine to me. If the SBSA maintainers are happy with the approach and PCI folk think the more generic parts look fine then would be good to move this forwards. Acked-by: Jonathan Cameron