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bh=9Iegew8C87PUBULbDOFADEVQbH+6F4VJbkJFD0Bu2N0=; b=Ybq8HvDbmkVcQnETVSdEgXLXNUVwm+CDxPc25D9oaFmErlWKrVtrfYsMTXypdxC6FtWiFDsZOXXhd+jaxyfYH7fHU0oVhQ8jrdu3AZgS6n7zhlTANXq/TR6AbDKq0ur2MapDSkIChzvmrQIUOGBSWxzwdJFgWfw7J+eA1xYNQb8= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C From: Jiqian Chen To: CC: Stefano Stabellini , Anthony Perard , Paul Durrant , , Huang Rui , Jiqian Chen , Huang Rui Subject: [RFC QEMU PATCH v6 1/1] xen/pci: get gsi from irq for passthrough devices Date: Fri, 19 Apr 2024 12:13:51 +0800 Message-ID: <20240419041351.633856-2-Jiqian.Chen@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240419041351.633856-1-Jiqian.Chen@amd.com> References: <20240419041351.633856-1-Jiqian.Chen@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF00000147:EE_|DM4PR12MB8521:EE_ X-MS-Office365-Filtering-Correlation-Id: c3b3a9bf-66db-4283-c73d-08dc602729c2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Apr 2024 04:14:09.9764 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c3b3a9bf-66db-4283-c73d-08dc602729c2 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF00000147.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB8521 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1713500077410100001 Content-Type: text/plain; charset="utf-8" In PVH dom0, it uses the linux local interrupt mechanism, when it allocs irq for a gsi, it is dynamic, and follow the principle of applying first, distributing first. And the irq number is alloced from small to large, but the applying gsi number is not, may gsi 38 comes before gsi 28, that causes the irq number is not equal with the gsi number. And when passthrough a device, qemu wants to use gsi to map pirq, xen_pt_realize->xc_physdev_map_pirq, but the gsi number is got from file /sys/bus/pci/devices//irq in current code, so it will fail when mapping. Translate irq to gsi by using new function supported by Xen tools. Signed-off-by: Huang Rui Signed-off-by: Jiqian Chen --- hw/xen/xen-host-pci-device.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/hw/xen/xen-host-pci-device.c b/hw/xen/xen-host-pci-device.c index 8c6e9a1716a2..5e9aa9679e3e 100644 --- a/hw/xen/xen-host-pci-device.c +++ b/hw/xen/xen-host-pci-device.c @@ -10,6 +10,7 @@ #include "qapi/error.h" #include "qemu/cutils.h" #include "xen-host-pci-device.h" +#include "hw/xen/xen_native.h" =20 #define XEN_HOST_PCI_MAX_EXT_CAP \ ((PCIE_CONFIG_SPACE_SIZE - PCI_CONFIG_SPACE_SIZE) / (PCI_CAP_SIZEOF + = 4)) @@ -368,7 +369,11 @@ void xen_host_pci_device_get(XenHostPCIDevice *d, uint= 16_t domain, if (*errp) { goto error; } - d->irq =3D v; + d->irq =3D xc_physdev_gsi_from_irq(xen_xc, v); + /* if fail to get gsi, fallback to irq */ + if (d->irq =3D=3D -1) { + d->irq =3D v; + } =20 xen_host_pci_get_hex_value(d, "class", &v, errp); if (*errp) { --=20 2.34.1