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bh=kYi3Wyegxmzc7EKOM+Ed9WYPUa0D9CsuJMsABf608SM=; b=nKVzNrI91PjbWfEFjtKKOXlHP9AxxQ1sfsiEgCJuGkpTb9B7v5m+8AGu9AQwBINCZc5EXgGZi6TFGvLEcw6/xA5TB5mOhRRXPnAPWWrPdM0tDvxe/mjohgGBISSMRE2rbxoOyEAC5/2cQcOt3cDfUm9PwWE2bsqq2O8znn13CWo= 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 v4 1/1] xen: Use gsi instead of irq for mapping pirq Date: Fri, 5 Jan 2024 15:19:19 +0800 Message-ID: <20240105071919.350397-2-Jiqian.Chen@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240105071919.350397-1-Jiqian.Chen@amd.com> References: <20240105071919.350397-1-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: MN1PEPF0000ECD8:EE_|SA1PR12MB8988:EE_ X-MS-Office365-Filtering-Correlation-Id: 6a048163-0ff8-4cad-2bb6-08dc0dbeaf80 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: 05 Jan 2024 07:19:41.3971 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6a048163-0ff8-4cad-2bb6-08dc0dbeaf80 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: MN1PEPF0000ECD8.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB8988 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1704439210162100001 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. Add gsi into XenHostPCIDevice and use gsi number that read from gsi sysfs if it exists. Co-developed-by: Huang Rui Signed-off-by: Jiqian Chen Reviewed-by: Stefano Stabellini --- hw/xen/xen-host-pci-device.c | 7 +++++++ hw/xen/xen-host-pci-device.h | 1 + hw/xen/xen_pt.c | 6 +++++- 3 files changed, 13 insertions(+), 1 deletion(-) diff --git a/hw/xen/xen-host-pci-device.c b/hw/xen/xen-host-pci-device.c index 8c6e9a1716a2..5be3279aa25b 100644 --- a/hw/xen/xen-host-pci-device.c +++ b/hw/xen/xen-host-pci-device.c @@ -370,6 +370,13 @@ void xen_host_pci_device_get(XenHostPCIDevice *d, uint= 16_t domain, } d->irq =3D v; =20 + xen_host_pci_get_dec_value(d, "gsi", &v, errp); + if (*errp) { + d->gsi =3D -1; + } else { + d->gsi =3D v; + } + xen_host_pci_get_hex_value(d, "class", &v, errp); if (*errp) { goto error; diff --git a/hw/xen/xen-host-pci-device.h b/hw/xen/xen-host-pci-device.h index 4d8d34ecb024..74c552bb5548 100644 --- a/hw/xen/xen-host-pci-device.h +++ b/hw/xen/xen-host-pci-device.h @@ -27,6 +27,7 @@ typedef struct XenHostPCIDevice { uint16_t device_id; uint32_t class_code; int irq; + int gsi; =20 XenHostPCIIORegion io_regions[PCI_NUM_REGIONS - 1]; XenHostPCIIORegion rom; diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c index 36e6f93c372f..d448f3a17306 100644 --- a/hw/xen/xen_pt.c +++ b/hw/xen/xen_pt.c @@ -839,7 +839,11 @@ static void xen_pt_realize(PCIDevice *d, Error **errp) goto out; } =20 - machine_irq =3D s->real_device.irq; + if (s->real_device.gsi < 0) { + machine_irq =3D s->real_device.irq; + } else { + machine_irq =3D s->real_device.gsi; + } if (machine_irq =3D=3D 0) { XEN_PT_LOG(d, "machine irq is 0\n"); cmd |=3D PCI_COMMAND_INTX_DISABLE; --=20 2.34.1