[PATCH i-g-t v3 07/10] tests/intel/xe_svm: Add svm-invalid-va test to verify SVM functionality with invalid address access

[Bommu Krishnaiah]

svm-invalid-va test ensures that the driver correctly handles catastrophic
errors when the GPU attempts to access an invalid address in SVM.

Signed-off-by: Bommu Krishnaiah <krishnaiah.bommu at intel.com>
Cc: Oak Zeng <oak.zeng at intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
---
 tests/intel/xe_svm.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tests/intel/xe_svm.c b/tests/intel/xe_svm.c
index f9e8eb2d9..895cf26ac 100644
--- a/tests/intel/xe_svm.c
+++ b/tests/intel/xe_svm.c
@@ -36,6 +36,9 @@
  *
  * SUBTEST: svm-atomic-access
  * Description: verify SVM basic functionality by using GPU atomic access any location in malloc'ed memory
+ *
+ * SUBTEST: svm-invalid-va
+ * Description: Verify SVM functionality while accessing an invalid address.
  */
 
 #include <fcntl.h>
@@ -269,6 +272,35 @@ static void svm_atomic_access(int fd, uint32_t vm, struct drm_xe_engine_class_in
 	free(dst);
 }
 
+/**
+ * Submit a GPU command to access an invalid address.
+ * Driver should detect a catastrophic error.
+ */
+static void svm_invalid_va(int fd, uint32_t vm, struct drm_xe_engine_class_instance *eci)
+{
+	uint64_t gpu_va = 0x1a0000;
+	size_t bo_size = xe_bb_size(fd, PAGE_ALIGN_UFENCE);
+	uint32_t *dst;
+
+	struct xe_buffer cmd_buf = {
+			.fd = fd,
+			.gpu_addr = (void *)(uintptr_t)gpu_va,
+			.vm = vm,
+			.size = bo_size,
+			.placement = vram_if_possible(fd, eci->gt_id),
+			.flag = DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM
+	};
+
+	dst = (uint32_t *)0x1fffffffffff000;
+
+	xe_create_cmdbuf(&cmd_buf, insert_store, (uint64_t)dst, 0xc0ffee, eci);
+
+	igt_assert_eq(__xe_submit_cmd(&cmd_buf), -EIO); // for invalid address __xe_wait_ufence will return -EIO
+
+	xe_destroy_cmdbuf(&cmd_buf);
+	free(dst);
+}
+
 igt_main
 {
 	int fd;
@@ -305,6 +337,10 @@ igt_main
 		xe_for_each_engine(fd, hwe)
 			svm_atomic_access(fd, vm, hwe);
 
+	igt_subtest_f("svm-invalid-va")
+		xe_for_each_engine(fd, hwe)
+			svm_invalid_va(fd, vm, hwe);
+
 	igt_fixture {
 		xe_vm_destroy(fd, vm);
 		drm_close_driver(fd);
-- 
2.25.1