[PATCH v8 1/4] drm-uapi/xe: Declare xe_vm_get_property_ioctl

Jonathan Cavitt
2026-03-31T15:57:09Z

Align with 20250403173614.67195-4-jonathan.cavitt@intel.com

Add initial declarations for the xe_vm_get_property_ioctl call, including
necessary structures and IOCTL macros.

v2:
- Remove engine class and instance (Ivan)

v3:
- Add declares for fault type, access type, and fault level (Matt Brost,
Ivan)

v4:
- Rebase (jcavitt)

v5:
- Clarify canonicity of fault address

Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Nishit Sharma <nishit.sharma@intel.com>
Cc: Ivan Briano <ivan.briano@intel.com>
---
include/drm-uapi/xe_drm.h | 86 +++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)

diff --git a/include/drm-uapi/xe_drm.h b/include/drm-uapi/xe_drm.h
index 077e66a682..f5de148257 100644
--- a/include/drm-uapi/xe_drm.h
+++ b/include/drm-uapi/xe_drm.h
@@ -83,6 +83,7 @@ extern "C" {
* - &DRM_IOCTL_XE_OBSERVATION
* - &DRM_IOCTL_XE_MADVISE
* - &DRM_IOCTL_XE_VM_QUERY_MEM_RANGE_ATTRS
+ * - &DRM_IOCTL_XE_VM_GET_PROPERTY
*/

/*
@@ -107,6 +108,7 @@ extern "C" {
#define DRM_XE_MADVISE 0x0c
#define DRM_XE_VM_QUERY_MEM_RANGE_ATTRS 0x0d
#define DRM_XE_EXEC_QUEUE_SET_PROPERTY 0x0e
+#define DRM_XE_VM_GET_PROPERTY 0x0f

/* Must be kept compact -- no holes */

@@ -125,6 +127,7 @@ extern "C" {
#define DRM_IOCTL_XE_MADVISE DRM_IOW(DRM_COMMAND_BASE + DRM_XE_MADVISE, struct drm_xe_madvise)
#define DRM_IOCTL_XE_VM_QUERY_MEM_RANGE_ATTRS DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_VM_QUERY_MEM_RANGE_ATTRS, struct drm_xe_vm_query_mem_range_attr)
#define DRM_IOCTL_XE_EXEC_QUEUE_SET_PROPERTY DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_SET_PROPERTY, struct drm_xe_exec_queue_set_property)
+#define DRM_IOCTL_XE_VM_GET_PROPERTY DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_VM_GET_PROPERTY, struct drm_xe_vm_get_property)

/**
* DOC: Xe IOCTL Extensions
@@ -1249,6 +1252,89 @@ struct drm_xe_vm_bind {
__u64 reserved[2];
};

+/** struct xe_vm_fault - Describes faults for %DRM_XE_VM_GET_PROPERTY_FAULTS */
+struct xe_vm_fault {
+ /** @address: Canonical address of the fault */
+ __u64 address;
+ /** @address_precision: Precision of faulted address */
+ __u32 address_precision;
+ /** @access_type: Type of address access that resulted in fault */
+#define FAULT_ACCESS_TYPE_READ 0
+#define FAULT_ACCESS_TYPE_WRITE 1
+#define FAULT_ACCESS_TYPE_ATOMIC 2
+ __u8 access_type;
+ /** @fault_type: Type of fault reported */
+#define FAULT_TYPE_NOT_PRESENT 0
+#define FAULT_TYPE_WRITE_ACCESS 1
+#define FAULT_TYPE_ATOMIC_ACCESS 2
+ __u8 fault_type;
+ /** @fault_level: fault level of the fault */
+#define FAULT_LEVEL_PTE 0
+#define FAULT_LEVEL_PDE 1
+#define FAULT_LEVEL_PDP 2
+#define FAULT_LEVEL_PML4 3
+#define FAULT_LEVEL_PML5 4
+ __u8 fault_level;
+ /** @pad: MBZ */
+ __u8 pad;
+ /** @reserved: MBZ */
+ __u64 reserved[4];
+};
+
+/**
+ * struct drm_xe_vm_get_property - Input of &DRM_IOCTL_XE_VM_GET_PROPERTY
+ *
+ * The user provides a VM and a property to query among DRM_XE_VM_GET_PROPERTY_*,
+ * and sets the values in the vm_id and property members, respectively. This
+ * determines both the VM to get the property of, as well as the property to
+ * report.
+ *
+ * If size is set to 0, the driver fills it with the required size for the
+ * requested property. The user is expected here to allocate memory for the
+ * property structure and to provide a pointer to the allocated memory using the
+ * data member. For some properties, this may be zero, in which case, the
+ * value of the property will be saved to the value member and size will remain
+ * zero on return.
+ *
+ * If size is not zero, then the IOCTL will attempt to copy the requested
+ * property into the data member.
+ *
+ * The IOCTL will return -ENOENT if the VM could not be identified from the
+ * provided VM ID, or -EINVAL if the IOCTL fails for any other reason, such as
+ * providing an invalid size for the given property or if the property data
+ * could not be copied to the memory allocated to the data member.
+ *
+ * The property member can be:
+ * - %DRM_XE_VM_GET_PROPERTY_FAULTS
+ */
+struct drm_xe_vm_get_property {
+ /** @extensions: Pointer to the first extension struct, if any */
+ __u64 extensions;
+
+ /** @vm_id: The ID of the VM to query the properties of */
+ __u32 vm_id;
+
+#define DRM_XE_VM_GET_PROPERTY_FAULTS 0
+ /** @property: property to get */
+ __u32 property;
+
+ /** @size: Size to allocate for @data */
+ __u32 size;
+
+ /** @pad: MBZ */
+ __u32 pad;
+
+ union {
+ /** @data: Pointer to user-defined array of flexible size and type */
+ __u64 data;
+ /** @value: Return value for scalar queries */
+ __u64 value;
+ };
+
+ /** @reserved: MBZ */
+ __u64 reserved[3];
+};
+
/**
* struct drm_xe_exec_queue_create - Input of &DRM_IOCTL_XE_EXEC_QUEUE_CREATE
*
--
2.43.0