From patchwork Fri Feb 26 08:49:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Xingang X-Patchwork-Id: 12106123 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 6CF40C433DB for ; Fri, 26 Feb 2021 08:51:48 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id F15B464EC3 for ; Fri, 26 Feb 2021 08:51:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F15B464EC3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60236 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lFYqg-0006Eh-VN for qemu-devel@archiver.kernel.org; Fri, 26 Feb 2021 03:51:47 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:50512) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFYol-0004rN-G2; Fri, 26 Feb 2021 03:49:47 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:3373) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFYoj-0003Yr-Aj; Fri, 26 Feb 2021 03:49:47 -0500 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4Dn3Fl0XCCz164BW; Fri, 26 Feb 2021 16:47:55 +0800 (CST) Received: from huawei.com (10.174.185.226) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.498.0; Fri, 26 Feb 2021 16:49:25 +0800 From: Wang Xingang To: Subject: [RFC PATCH 1/4] pci: Add PCI_BUS_IOMMU property Date: Fri, 26 Feb 2021 08:49:10 +0000 Message-ID: <1614329353-2124-2-git-send-email-wangxingang5@huawei.com> X-Mailer: git-send-email 2.6.4.windows.1 In-Reply-To: <1614329353-2124-1-git-send-email-wangxingang5@huawei.com> References: <1614329353-2124-1-git-send-email-wangxingang5@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.185.226] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.190; envelope-from=wangxingang5@huawei.com; helo=szxga04-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xieyingtai@huawei.com, peter.maydell@linaro.org, cenjiahui@huawei.com, wangxingang5@huawei.com, mst@redhat.com, shannon.zhaosl@gmail.com, qemu-arm@nongnu.org, imammedo@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Xingang Wang This property can be useful to check whether this bus is attached to iommu. Signed-off-by: Xingang Wang Signed-off-by: Jiahui Cen --- include/hw/pci/pci_bus.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h index 347440d42c..42109e8a06 100644 --- a/include/hw/pci/pci_bus.h +++ b/include/hw/pci/pci_bus.h @@ -24,6 +24,8 @@ enum PCIBusFlags { PCI_BUS_IS_ROOT = 0x0001, /* PCIe extended configuration space is accessible on this bus */ PCI_BUS_EXTENDED_CONFIG_SPACE = 0x0002, + /* Iommu is enabled on this bus */ + PCI_BUS_IOMMU = 0x0004, }; struct PCIBus { @@ -63,4 +65,15 @@ static inline bool pci_bus_allows_extended_config_space(PCIBus *bus) return !!(bus->flags & PCI_BUS_EXTENDED_CONFIG_SPACE); } +static inline bool pci_bus_has_iommu(PCIBus *bus) +{ + PCIBus *root_bus = bus; + + while (root_bus && !pci_bus_is_root(root_bus)) { + root_bus = pci_get_bus(root_bus->parent_dev); + } + + return !!(root_bus->flags & PCI_BUS_IOMMU); +} + #endif /* QEMU_PCI_BUS_H */