anv: Add function to get the list of page faults

Adds function to get the list of page faults, returns NULL if the KMD
is too old or if there was an error retrieving the data.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41318>

src/intel/vulkan/anv_device.c

@@ -2472,3 +2472,16 @@ anv_device_get_pat_entry(struct anv_device *device,
    else
       return &device->info->pat.writecombining;
 }
+
+struct intel_pagefault_buffer *
+anv_device_alloc_get_vm_faults(struct anv_device *device)
+{
+   if (!device->physical->can_get_vm_faults)
+      return NULL;
+   switch (device->info->kmd_type) {
+   case INTEL_KMD_TYPE_XE:
+      return anv_xe_device_alloc_get_vm_faults(device);
+   default:
+      return NULL;
+   }
+}

src/intel/vulkan/anv_physical_device.c

@@ -12,6 +12,7 @@
 
 #include "common/intel_common.h"
 #include "common/intel_uuid.h"
+#include "common/xe/intel_gem.h"
 #include "common/xe/intel_queue.h"
 
 #include "perf/intel_perf.h"
@@ -2977,6 +2978,9 @@ anv_physical_device_try_create(struct vk_instance *vk_instance,
       device->info.ver < 20 || device->info.kmd_type == INTEL_KMD_TYPE_I915 ||
       instance->drirc.features.scratch_page;
 
+   device->can_get_vm_faults =
+      !device->has_scratch_page && xe_gem_supports_get_vm_faults(device->local_fd);
+
    device->compiler = brw_compiler_create(NULL, &device->info);
    if (device->compiler == NULL) {
       result = vk_error(instance, VK_ERROR_OUT_OF_HOST_MEMORY);

src/intel/vulkan/anv_private.h

@@ -47,6 +47,7 @@
 #include "common/intel_l3_config.h"
 #include "common/intel_measure.h"
 #include "common/intel_sample_positions.h"
+#include "common/intel_pagefault.h"
 #include "decoder/intel_decoder.h"
 #include "dev/intel_device_info.h"
 #include "blorp/blorp.h"
@@ -1553,6 +1554,8 @@ struct anv_physical_device {
 
     bool                                        has_scratch_page;
 
+    bool                                        can_get_vm_faults;
+
     /** Whether the device can support compression control */
     bool                                        has_compression_control;
     /** Whether the device expose support for compression control */
@@ -7150,6 +7153,8 @@ anv_device_utrace_emit_gfx_copy_buffer(struct u_trace_context *utctx,
                                        void *ts_from, uint64_t from_offset_B,
                                        void *ts_to, uint64_t to_offset_B,
                                        uint64_t size_B);
+struct intel_pagefault_buffer *
+anv_device_alloc_get_vm_faults(struct anv_device *device);
 
 void
 anv_device_update_fault_state(struct anv_device *device,

src/intel/vulkan/xe/anv_device.c

@@ -28,6 +28,7 @@
 #include "drm-uapi/xe_drm.h"
 
 #include "common/xe/intel_device_query.h"
+#include "common/xe/intel_gem.h"
 
 bool anv_xe_device_destroy_vm(struct anv_device *device)
 {
@@ -227,3 +228,9 @@ anv_xe_device_check_status(struct vk_device *vk_device)
 
    return result;
 }
+
+struct intel_pagefault_buffer *
+anv_xe_device_alloc_get_vm_faults(struct anv_device *device)
+{
+   return xe_gem_alloc_get_vm_faults(device->fd, device->vm_id);
+}

src/intel/vulkan/xe/anv_device.h

@@ -27,13 +27,16 @@
 #include "vulkan/vulkan_core.h"
 #include "vk_device.h"
 
+#include "common/intel_pagefault.h"
+
 struct anv_device;
 struct anv_physical_device;
 
 bool anv_xe_device_destroy_vm(struct anv_device *device);
 VkResult anv_xe_device_setup_vm(struct anv_device *device);
 VkResult anv_xe_device_check_status(struct vk_device *vk_device);
-
+struct intel_pagefault_buffer *
+anv_xe_device_alloc_get_vm_faults(struct anv_device *device);
 VkResult
 anv_xe_physical_device_get_parameters(struct anv_physical_device *device);
 VkResult