From: Mukesh R <mrathor@linux.microsoft.com>
To: hpa@zytor.com, robin.murphy@arm.com, robh@kernel.org,
wei.liu@kernel.org, mrathor@linux.microsoft.com,
mhklinux@outlook.com, muislam@microsoft.com,
namjain@linux.microsoft.com, magnuskulke@linux.microsoft.com,
anbelski@linux.microsoft.com, linux-kernel@vger.kernel.org,
linux-hyperv@vger.kernel.org, iommu@lists.linux.dev,
linux-pci@vger.kernel.org, linux-arch@vger.kernel.org
Cc: kys@microsoft.com, haiyangz@microsoft.com, decui@microsoft.com,
longli@microsoft.com, tglx@kernel.org, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
joro@8bytes.org, will@kernel.org, lpieralisi@kernel.org,
kwilczynski@kernel.org, bhelgaas@google.com, arnd@arndb.de
Subject: [PATCH V1 05/13] mshv: Declarations and definitions for VFIO-MSHV bridge device
Date: Tue, 21 Apr 2026 19:32:31 -0700 [thread overview]
Message-ID: <20260422023239.1171963-6-mrathor@linux.microsoft.com> (raw)
In-Reply-To: <20260422023239.1171963-1-mrathor@linux.microsoft.com>
Add data structs needed by the subsequent patch that introduces a new
module to implement VFIO-MSHV pseudo device.
Signed-off-by: Mukesh R <mrathor@linux.microsoft.com>
---
drivers/hv/mshv_root.h | 19 +++++++++++++++++++
include/uapi/linux/mshv.h | 30 ++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)
diff --git a/drivers/hv/mshv_root.h b/drivers/hv/mshv_root.h
index a85c24dcc701..b9880d0bdc4d 100644
--- a/drivers/hv/mshv_root.h
+++ b/drivers/hv/mshv_root.h
@@ -227,6 +227,25 @@ struct port_table_info {
};
};
+struct mshv_device {
+ const struct mshv_device_ops *device_ops;
+ struct mshv_partition *device_pt;
+ void *device_private;
+ struct hlist_node device_ptnode;
+};
+
+struct mshv_device_ops {
+ const char *device_name;
+ long (*device_create)(struct mshv_device *dev);
+ void (*device_release)(struct mshv_device *dev);
+ long (*device_set_attr)(struct mshv_device *dev,
+ struct mshv_device_attr *attr);
+ long (*device_has_attr)(struct mshv_device *dev,
+ struct mshv_device_attr *attr);
+};
+
+extern struct mshv_device_ops mshv_vfio_device_ops;
+
int mshv_update_routing_table(struct mshv_partition *partition,
const struct mshv_user_irq_entry *entries,
unsigned int numents);
diff --git a/include/uapi/linux/mshv.h b/include/uapi/linux/mshv.h
index 32ff92b6342b..4373a8243951 100644
--- a/include/uapi/linux/mshv.h
+++ b/include/uapi/linux/mshv.h
@@ -404,4 +404,34 @@ struct mshv_sint_mask {
/* hv_hvcall device */
#define MSHV_HVCALL_SETUP _IOW(MSHV_IOCTL, 0x1E, struct mshv_vtl_hvcall_setup)
#define MSHV_HVCALL _IOWR(MSHV_IOCTL, 0x1F, struct mshv_vtl_hvcall)
+
+/* device passhthru */
+#define MSHV_CREATE_DEVICE_TEST 1
+
+enum {
+ MSHV_DEV_TYPE_VFIO,
+ MSHV_DEV_TYPE_MAX,
+};
+
+struct mshv_create_device {
+ __u32 type; /* in: MSHV_DEV_TYPE_xxx */
+ __u32 fd; /* out: device handle */
+ __u32 flags; /* in: MSHV_CREATE_DEVICE_xxx */
+};
+
+#define MSHV_DEV_VFIO_FILE 1
+#define MSHV_DEV_VFIO_FILE_ADD 1
+#define MSHV_DEV_VFIO_FILE_DEL 2
+
+struct mshv_device_attr {
+ __u32 flags; /* no flags currently defined */
+ __u32 group; /* device-defined */
+ __u64 attr; /* group-defined */
+ __u64 addr; /* userspace address of attr data */
+};
+
+/* Device fds created with MSHV_CREATE_DEVICE */
+#define MSHV_SET_DEVICE_ATTR _IOW(MSHV_IOCTL, 0x00, struct mshv_device_attr)
+#define MSHV_HAS_DEVICE_ATTR _IOW(MSHV_IOCTL, 0x01, struct mshv_device_attr)
+
#endif
--
2.51.2.vfs.0.1
next prev parent reply other threads:[~2026-04-22 2:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-22 2:32 [PATCH V1 00/13] PCI passthru on Hyper-V (Part I) Mukesh R
2026-04-22 2:32 ` [PATCH V1 01/13] iommu/hyperv: rename hyperv-iommu.c to hyperv-irq.c Mukesh R
2026-04-22 2:32 ` [PATCH V1 02/13] x86/hyperv: cosmetic changes in irqdomain.c for readability Mukesh R
2026-04-22 2:32 ` [PATCH V1 03/13] x86/hyperv: add insufficient memory support in irqdomain.c Mukesh R
2026-04-22 2:32 ` [PATCH V1 04/13] mshv: Provide a way to get partition id if running in a VMM process Mukesh R
2026-04-22 2:32 ` Mukesh R [this message]
2026-04-22 2:32 ` [PATCH V1 06/13] mshv: Implement mshv bridge device for VFIO Mukesh R
2026-04-22 2:32 ` [PATCH V1 07/13] mshv: Add ioctl support for MSHV-VFIO bridge device Mukesh R
2026-04-22 2:32 ` [PATCH V1 08/13] PCI: hv: rename hv_compose_msi_msg to hv_vmbus_compose_msi_msg Mukesh R
2026-04-22 2:32 ` [PATCH V1 09/13] mshv: Import data structs around device passthru from hyperv headers Mukesh R
2026-04-22 2:32 ` [PATCH V1 10/13] PCI: hv: Build device id for a VMBus device, export PCI devid function Mukesh R
2026-04-22 2:32 ` [PATCH V1 11/13] x86/hyperv: Implement hyperv virtual iommu Mukesh R
2026-04-22 2:32 ` [PATCH V1 12/13] mshv: Populate mmio mappings for PCI passthru Mukesh R
2026-04-22 2:32 ` [PATCH V1 13/13] mshv: pin all ram mem regions if partition has device passthru Mukesh R
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