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Wysocki" , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= CC: , , , , Huang Rui , Jiqian Chen , Huang Rui Subject: [RFC KERNEL PATCH v7 1/2] xen/pvh: Setup gsi for passthrough device Date: Wed, 15 May 2024 14:50:10 +0800 Message-ID: <20240515065011.13797-2-Jiqian.Chen@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240515065011.13797-1-Jiqian.Chen@amd.com> References: <20240515065011.13797-1-Jiqian.Chen@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: CO1PEPF000044F3:EE_|MW4PR12MB7032:EE_ X-MS-Office365-Filtering-Correlation-Id: 793a59ad-cbba-492c-754c-08dc74ab50ee X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|36860700004|376005|82310400017|1800799015; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?BiwMgfZHtnz/lwEJzBjQILySzL9iirr9tnAVxQAwk4Ey0qhwshXV5ZwElOwu?= =?us-ascii?Q?o5reCALQIluqmFhi/WgRRv5YiZuhSBAmlWG3bwqPnUbBGzSmFRHJsrN9AXyf?= =?us-ascii?Q?NVF8PQSkFc3P6epfhSehVmtaUJK2NdMhx81aXuelTfzi/7qTZS/p2Nsqjaxx?= =?us-ascii?Q?94ORvqWuXIUZIfSMZfkFIqhU2khXop8EZ9/DenlGepeaaKftNclT7S6N4VCV?= =?us-ascii?Q?oDliIrMgsQZQLTAR31LpTdnq/UmjQiC+bQTTfJd8eW8QDRCCAbOLQZiRAMlf?= =?us-ascii?Q?0Ye72GK5fcEKiPhkx8Qpqs8ABKwv7eJQaTZxp7IL2drqjpqpku3O5OJp5BhY?= =?us-ascii?Q?JdELPhmVM8CLcLQMUTcu+Ub/3ZCC9CQdrzQFiD+RNORQm3RCAGjhjTZDvoGW?= =?us-ascii?Q?9gc/2ZGiaUNGHc8GChSQmbHDF9qSGcc1I/8E0KL5cLEyClpMcJkUcXBoAYbk?= =?us-ascii?Q?w0NZyw4aZFNBHfpsDyHc2ARUT607bSpjrh1AQp312QUs6ZlZ8bYikp4Vj5Tc?= =?us-ascii?Q?fCuPsTKo+REU/zjbyXfEEsE5yaVyvhLJl4EG01wBrt8o1HXzp7VlhX/Teb83?= =?us-ascii?Q?rgwOTL+Nr1j0Z+9tiFnWsqMk5scGPLnCx7dzg2NkTsMLshLknXzeqnDYab5m?= =?us-ascii?Q?dght+PxgJbspmpuhXUbQd0gm3Yn+JnC8TN5b0bhEjEQHJ5FiiEOJiROhCV70?= =?us-ascii?Q?3yoDCIfgKuZVVqxL9rWfWMh/euyP5155OmjUYr3MWKW3VAGC9yL9AQ6GbjTg?= =?us-ascii?Q?bBGQNzCGDo+eN0aeUpZIgc0fyjhHLY15BxARpcsTigabvrWbLCCvKxa5zcV1?= =?us-ascii?Q?dTvZXq+OmM/EC8mTKFZj9T7NLspyQ0ogfZcobgusN+aWNDhedqVSPR4/iMNG?= =?us-ascii?Q?E7xWHGDXX+NdQRFEqxt9Nt2AQiTdUWECMoyGRts499IPuAvA0gE+LlDEiNeh?= =?us-ascii?Q?K8NpKuazJLgrfqYm7N1QKaZusgrdYmhRd5Zw/hDeiokvUZEf+oWEouEDD4Jx?= =?us-ascii?Q?bNTCkKicMeLMsO/2dLbBK/TjBG5oMW41MDhpJSI96rpsMzISnvc/sxEoGMDr?= =?us-ascii?Q?q/X16C+D88fjWdU/OCclNU5sausoUGq49UFY/MT1K7DDC2L/GfK5/pSFiWQw?= =?us-ascii?Q?h21iG0vlcH5P9g5B+OskKgCIBPed4cWn8ejK4LHYce7ZNSFGvb0ZEXdjFZva?= =?us-ascii?Q?oc3Jzit4HOVRrw1mLkOiU3gS6ZDQltwVycvVmQDIL+wZEpPTiCShrHflL34N?= =?us-ascii?Q?glWAhc59X9pXtyIUIvPH0mYutGVZrcpzxAuha0kMqvqsPJ2JRFMB80pPd2nt?= =?us-ascii?Q?DMjsW+0m0DSv2ytTcSbK3cBcGo2PLwXe1ZNnUEb0t0Hsr0sKF8VAzGJsdH2a?= =?us-ascii?Q?Iahse5Mm0uMqixn5lrM2gHwrmPBq?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(36860700004)(376005)(82310400017)(1800799015);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 May 2024 06:50:32.4396 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 793a59ad-cbba-492c-754c-08dc74ab50ee 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: CO1PEPF000044F3.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7032 Content-Type: text/plain; charset="utf-8" In PVH dom0, the gsis don't get registered, but the gsi of a passthrough device must be configured for it to be able to be mapped into a domU. When assign a device to passthrough, proactively setup the gsi of the device during that process. Co-developed-by: Huang Rui Signed-off-by: Jiqian Chen Reviewed-by: Stefano Stabellini --- arch/x86/xen/enlighten_pvh.c | 21 +++++++++++++ drivers/acpi/pci_irq.c | 2 +- drivers/xen/acpi.c | 50 ++++++++++++++++++++++++++++++ drivers/xen/xen-pciback/pci_stub.c | 21 +++++++++++++ include/linux/acpi.h | 1 + include/xen/acpi.h | 10 ++++++ 6 files changed, 104 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c index 27a2a02ef8fb..711cdcbc6916 100644 --- a/arch/x86/xen/enlighten_pvh.c +++ b/arch/x86/xen/enlighten_pvh.c @@ -4,6 +4,7 @@ #include =20 #include +#include =20 #include #include @@ -27,6 +28,26 @@ bool __ro_after_init xen_pvh; EXPORT_SYMBOL_GPL(xen_pvh); =20 +int xen_pvh_setup_gsi(int gsi, int trigger, int polarity) +{ + int ret; + struct physdev_setup_gsi setup_gsi; + + setup_gsi.gsi =3D gsi; + setup_gsi.triggering =3D (trigger =3D=3D ACPI_EDGE_SENSITIVE ? 0 : 1); + setup_gsi.polarity =3D (polarity =3D=3D ACPI_ACTIVE_HIGH ? 0 : 1); + + ret =3D HYPERVISOR_physdev_op(PHYSDEVOP_setup_gsi, &setup_gsi); + if (ret =3D=3D -EEXIST) { + xen_raw_printk("Already setup the GSI :%d\n", gsi); + ret =3D 0; + } else if (ret) + xen_raw_printk("Fail to setup GSI (%d)!\n", gsi); + + return ret; +} +EXPORT_SYMBOL_GPL(xen_pvh_setup_gsi); + void __init xen_pvh_init(struct boot_params *boot_params) { u32 msr; diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index ff30ceca2203..630fe0a34bc6 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -288,7 +288,7 @@ static int acpi_reroute_boot_interrupt(struct pci_dev *= dev, } #endif /* CONFIG_X86_IO_APIC */ =20 -static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int= pin) +struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) { struct acpi_prt_entry *entry =3D NULL; struct pci_dev *bridge; diff --git a/drivers/xen/acpi.c b/drivers/xen/acpi.c index 6893c79fd2a1..9e2096524fbc 100644 --- a/drivers/xen/acpi.c +++ b/drivers/xen/acpi.c @@ -30,6 +30,7 @@ * IN THE SOFTWARE. */ =20 +#include #include #include #include @@ -75,3 +76,52 @@ int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_s= tate, return xen_acpi_notify_hypervisor_state(sleep_state, val_a, val_b, true); } + +struct acpi_prt_entry { + struct acpi_pci_id id; + u8 pin; + acpi_handle link; + u32 index; +}; + +int xen_acpi_get_gsi_info(struct pci_dev *dev, + int *gsi_out, + int *trigger_out, + int *polarity_out) +{ + int gsi; + u8 pin; + struct acpi_prt_entry *entry; + int trigger =3D ACPI_LEVEL_SENSITIVE; + int polarity =3D acpi_irq_model =3D=3D ACPI_IRQ_MODEL_GIC ? + ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW; + + if (!dev || !gsi_out || !trigger_out || !polarity_out) + return -EINVAL; + + pin =3D dev->pin; + if (!pin) + return -EINVAL; + + entry =3D acpi_pci_irq_lookup(dev, pin); + if (entry) { + if (entry->link) + gsi =3D acpi_pci_link_allocate_irq(entry->link, + entry->index, + &trigger, &polarity, + NULL); + else + gsi =3D entry->index; + } else + gsi =3D -1; + + if (gsi < 0) + return -EINVAL; + + *gsi_out =3D gsi; + *trigger_out =3D trigger; + *polarity_out =3D polarity; + + return 0; +} +EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_info); diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/p= ci_stub.c index 46c40ec8a18e..2b90d832d0a7 100644 --- a/drivers/xen/xen-pciback/pci_stub.c +++ b/drivers/xen/xen-pciback/pci_stub.c @@ -21,6 +21,9 @@ #include #include #include +#ifdef CONFIG_ACPI +#include +#endif #include #include #include "pciback.h" @@ -367,6 +370,9 @@ static int pcistub_match(struct pci_dev *dev) static int pcistub_init_device(struct pci_dev *dev) { struct xen_pcibk_dev_data *dev_data; +#ifdef CONFIG_ACPI + int gsi, trigger, polarity; +#endif int err =3D 0; =20 dev_dbg(&dev->dev, "initializing...\n"); @@ -435,6 +441,21 @@ static int pcistub_init_device(struct pci_dev *dev) goto config_release; pci_restore_state(dev); } + +#ifdef CONFIG_ACPI + err =3D xen_acpi_get_gsi_info(dev, &gsi, &trigger, &polarity); + if (err) { + dev_err(&dev->dev, "Fail to get gsi info!\n"); + goto config_release; + } + + if (xen_initial_domain() && xen_pvh_domain()) { + err =3D xen_pvh_setup_gsi(gsi, trigger, polarity); + if (err) + goto config_release; + } +#endif + /* Now disable the device (this also ensures some private device * data is setup before we export) */ diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 34829f2c517a..f8690b02bba4 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -361,6 +361,7 @@ void acpi_unregister_gsi (u32 gsi); =20 struct pci_dev; =20 +struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin); int acpi_pci_irq_enable (struct pci_dev *dev); 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Wed, 15 May 2024 01:50:32 -0500 From: Jiqian Chen To: Juergen Gross , Stefano Stabellini , Bjorn Helgaas , "Rafael J . Wysocki" , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= CC: , , , , Huang Rui , Jiqian Chen , Huang Rui Subject: [RFC KERNEL PATCH v7 2/2] xen/privcmd: Add new syscall to get gsi from dev Date: Wed, 15 May 2024 14:50:11 +0800 Message-ID: <20240515065011.13797-3-Jiqian.Chen@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240515065011.13797-1-Jiqian.Chen@amd.com> References: <20240515065011.13797-1-Jiqian.Chen@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: CO1PEPF000044F1:EE_|BY1PR12MB8445:EE_ X-MS-Office365-Filtering-Correlation-Id: 96522366-1522-4902-667c-08dc74ab52f1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|36860700004|376005|1800799015|82310400017; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?XkkMZld4FOxuVGYl6xJEg2UAyYjIZxxtmqkNByGES0zePyuHySd/olj6zrh5?= =?us-ascii?Q?mWwDjTWAvsfJd0yey3LfcOAUPszuNilq8laBnuEoz9IntpPa9c5FViO3TgXo?= =?us-ascii?Q?Ug1cvQdQXwOqlrya3grdypEvs2vyQxQ6EErfLu+/TCFk+2gvmU4youfphJsW?= =?us-ascii?Q?FR7BBxCCBdk7JVCb7NyEABphhki69XtxygOpUU3hap/uP/RTHYP/7Tjb7W3U?= =?us-ascii?Q?7W0292Lt7ZJNq+AAQDZli1CXLf5Ip6kvWdEnSzLRtKF2+vNjg+DYGxiNYILd?= =?us-ascii?Q?N57QupOw+yfDFRd89buUkNROMHYS7gPmuv6/HkFILXkFERWIbx3j/6rfPdbC?= =?us-ascii?Q?+KBMxUk/Ua+jdDznUtxPaAI83CI3oksatkvOnfWPEkH2YuHGTkGdMtfesouD?= =?us-ascii?Q?5HhiiPfzgCNjG3a09x9zrY5Fo/5QBIkrg3tvJNJNVQEDbse3YKmLjhc8JLN/?= =?us-ascii?Q?onJIKcidrvAYq1E2FHLvKOeTYdfL6UFlCafFDx23TiFeSuN5LyQdqXQ3vCs6?= =?us-ascii?Q?jzHzHYY4eYfeU/AjUP6EBlRTTbU73iWnMBaaY3ajIuvd7zPlGbg5CGZx3vUU?= =?us-ascii?Q?FM2VBDDJTXjcYuUtEVLAMBKvIuzJ8qDCPNpCWrS+GHV7bhIJcBLOeDd2bQlW?= =?us-ascii?Q?uwu44AYA3SWqv+isjZvZKt40f2LGc1qB8d1HOSBfIEq1WA/tB9U3JbrobDDl?= =?us-ascii?Q?iPB2EMBgRWciL3Cs3k562LMjZ3xd5aNVnMOF7m4CunoeGb41+LIBMPhWbYQm?= =?us-ascii?Q?ahTMYTgWMoFK08UHtwsumw7XJ6jjRiEf0oAGkxw7ZQD2z4yagteGaDFlGP/Z?= =?us-ascii?Q?4mXB0ReJhMzYcHtoZPToYDMmLv0L5CP80uUKpcSDh0JKoO9EgD5oCSd2MbLP?= =?us-ascii?Q?skOv7/uxTrBHFAwYHOgbfXq5JXiAsmpbDcU3bDqkqNWKAaeZo05uSPFuq1dh?= =?us-ascii?Q?G1nUWPlAIsgeYXZ62GowjERojQMrYHr3j8laH/pfIJlpVt0RlhnDaZuUghlz?= =?us-ascii?Q?xmh66V7+X9+divEFLVDN8CDv5FXSBmtVKzc0D3mu7WWoOC+ZJbJram+XokXj?= =?us-ascii?Q?Cx+zs1YTtNzKm3us+MTpJzr7ZpfypcwvSsUlwvrOrFtLcKlnvGk8AvVGF5eW?= =?us-ascii?Q?jv4ZdbWMw5bN7tT1Vk/2OXo13C3Q+IooYfnvVc91xUlcfcaSypeWftnAfmJY?= =?us-ascii?Q?WnGf86RwvsZ1nuul+okQNw72HkmwvawgUQXZeKUxeHAKFKECkg3rE8nwYw3M?= =?us-ascii?Q?4xzF5Aqzha5suO9UX6ojE4YgVI6JNnMANuKC3BS4qhCXbAB0g2s/CSQNjUSk?= =?us-ascii?Q?hxudPpEMk7gk50JxxaDOxiXew89kHFmb8deMBV9t1W+FFs3dmHPGBd5+xHvd?= =?us-ascii?Q?daH9YUUrzEIQN5mPLJIhg7NKZcxA?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(36860700004)(376005)(1800799015)(82310400017);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 May 2024 06:50:35.7987 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 96522366-1522-4902-667c-08dc74ab52f1 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: CO1PEPF000044F1.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY1PR12MB8445 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, it causes the irq number is not equal with the gsi number. And when passthrough a device, QEMU will use device's gsi number to do pirq mapping, but the gsi number is got from file /sys/bus/pci/devices//irq, irq!=3D gsi, so it will fail when mapping. And in current linux codes, there is no method to get gsi for userspace. For above purpose, record gsi of pcistub devices when init pcistub and add a new syscall into privcmd to let userspace can get gsi when they have a need. Co-developed-by: Huang Rui Signed-off-by: Jiqian Chen --- drivers/xen/privcmd.c | 28 ++++++++++++++++++++++ drivers/xen/xen-pciback/pci_stub.c | 38 +++++++++++++++++++++++++++--- include/uapi/xen/privcmd.h | 7 ++++++ include/xen/acpi.h | 2 ++ 4 files changed, 72 insertions(+), 3 deletions(-) diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index 67dfa4778864..5953a03b5cb0 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -45,6 +45,9 @@ #include #include #include +#ifdef CONFIG_ACPI +#include +#endif =20 #include "privcmd.h" =20 @@ -842,6 +845,27 @@ static long privcmd_ioctl_mmap_resource(struct file *f= ile, return rc; } =20 +static long privcmd_ioctl_gsi_from_dev(struct file *file, void __user *uda= ta) +{ + struct privcmd_gsi_from_dev kdata; + + if (copy_from_user(&kdata, udata, sizeof(kdata))) + return -EFAULT; + +#ifdef CONFIG_ACPI + kdata.gsi =3D pcistub_get_gsi_from_sbdf(kdata.sbdf); + if (kdata.gsi =3D=3D -1) + return -EINVAL; +#else + kdata.gsi =3D -1; +#endif + + if (copy_to_user(udata, &kdata, sizeof(kdata))) + return -EFAULT; + + return 0; +} + #ifdef CONFIG_XEN_PRIVCMD_EVENTFD /* Irqfd support */ static struct workqueue_struct *irqfd_cleanup_wq; @@ -1529,6 +1553,10 @@ static long privcmd_ioctl(struct file *file, ret =3D privcmd_ioctl_ioeventfd(file, udata); break; =20 + case IOCTL_PRIVCMD_GSI_FROM_DEV: + ret =3D privcmd_ioctl_gsi_from_dev(file, udata); + break; + default: break; } diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/p= ci_stub.c index 2b90d832d0a7..4b62b4d377a9 100644 --- a/drivers/xen/xen-pciback/pci_stub.c +++ b/drivers/xen/xen-pciback/pci_stub.c @@ -56,6 +56,9 @@ struct pcistub_device { =20 struct pci_dev *dev; struct xen_pcibk_device *pdev;/* non-NULL if struct pci_dev is in use */ +#ifdef CONFIG_ACPI + int gsi; +#endif }; =20 /* Access to pcistub_devices & seized_devices lists and the initialize_dev= ices @@ -88,6 +91,9 @@ static struct pcistub_device *pcistub_device_alloc(struct= pci_dev *dev) =20 kref_init(&psdev->kref); spin_lock_init(&psdev->lock); +#ifdef CONFIG_ACPI + psdev->gsi =3D -1; +#endif =20 return psdev; } @@ -220,6 +226,25 @@ static struct pci_dev *pcistub_device_get_pci_dev(stru= ct xen_pcibk_device *pdev, return pci_dev; } =20 +#ifdef CONFIG_ACPI +int pcistub_get_gsi_from_sbdf(unsigned int sbdf) +{ + struct pcistub_device *psdev; + int domain =3D sbdf >> 16; + int bus =3D (sbdf >> 8) & 0xff; + int slot =3D (sbdf >> 3) & 0x1f; + int func =3D sbdf & 0x7; + + psdev =3D pcistub_device_find(domain, bus, slot, func); + + if (!psdev) + return -1; + + return psdev->gsi; +} +EXPORT_SYMBOL_GPL(pcistub_get_gsi_from_sbdf); +#endif + struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev, int domain, int bus, int slot, int func) @@ -367,14 +392,20 @@ static int pcistub_match(struct pci_dev *dev) return found; } =20 -static int pcistub_init_device(struct pci_dev *dev) +static int pcistub_init_device(struct pcistub_device *psdev) { struct xen_pcibk_dev_data *dev_data; + struct pci_dev *dev; #ifdef CONFIG_ACPI int gsi, trigger, polarity; #endif int err =3D 0; =20 + if (!psdev) + return -EINVAL; + + dev =3D psdev->dev; + dev_dbg(&dev->dev, "initializing...\n"); =20 /* The PCI backend is not intended to be a module (or to work with @@ -448,6 +479,7 @@ static int pcistub_init_device(struct pci_dev *dev) dev_err(&dev->dev, "Fail to get gsi info!\n"); goto config_release; } + psdev->gsi =3D gsi; =20 if (xen_initial_domain() && xen_pvh_domain()) { err =3D xen_pvh_setup_gsi(gsi, trigger, polarity); @@ -495,7 +527,7 @@ static int __init pcistub_init_devices_late(void) =20 spin_unlock_irqrestore(&pcistub_devices_lock, flags); =20 - err =3D pcistub_init_device(psdev->dev); + err =3D pcistub_init_device(psdev); if (err) { dev_err(&psdev->dev->dev, "error %d initializing device\n", err); @@ -565,7 +597,7 @@ static int pcistub_seize(struct pci_dev *dev, spin_unlock_irqrestore(&pcistub_devices_lock, flags); =20 /* don't want irqs disabled when calling pcistub_init_device */ - err =3D pcistub_init_device(psdev->dev); + err =3D pcistub_init_device(psdev); =20 spin_lock_irqsave(&pcistub_devices_lock, flags); =20 diff --git a/include/uapi/xen/privcmd.h b/include/uapi/xen/privcmd.h index 8b8c5d1420fe..220e7670a113 100644 --- a/include/uapi/xen/privcmd.h +++ b/include/uapi/xen/privcmd.h @@ -126,6 +126,11 @@ struct privcmd_ioeventfd { __u8 pad[2]; }; =20 +struct privcmd_gsi_from_dev { + __u32 sbdf; + int gsi; +}; + /* * @cmd: IOCTL_PRIVCMD_HYPERCALL * @arg: &privcmd_hypercall_t @@ -157,5 +162,7 @@ struct privcmd_ioeventfd { _IOW('P', 8, struct privcmd_irqfd) #define IOCTL_PRIVCMD_IOEVENTFD \ _IOW('P', 9, struct privcmd_ioeventfd) +#define IOCTL_PRIVCMD_GSI_FROM_DEV \ + _IOC(_IOC_NONE, 'P', 10, sizeof(struct privcmd_gsi_from_dev)) =20 #endif /* __LINUX_PUBLIC_PRIVCMD_H__ */ diff --git a/include/xen/acpi.h b/include/xen/acpi.h index 9b50027113f3..0bf5f4884456 100644 --- a/include/xen/acpi.h +++ b/include/xen/acpi.h @@ -83,4 +83,6 @@ int xen_acpi_get_gsi_info(struct pci_dev *dev, int *gsi_out, int *trigger_out, int *polarity_out); + +int pcistub_get_gsi_from_sbdf(unsigned int sbdf); #endif /* _XEN_ACPI_H */ --=20 2.34.1