Igt-dev Archive on lore.kernel.org
 help / color / mirror / Atom feed
* [i-g-t] tests/intel/xe_madvise: Add partial-unbind-dontneed subtest
@ 2026-05-07  6:03 Arvind Yadav
  2026-05-07 17:41 ` ✓ i915.CI.BAT: success for " Patchwork
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: Arvind Yadav @ 2026-05-07  6:03 UTC (permalink / raw)
  To: igt-dev
  Cc: matthew.brost, himal.prasad.ghimiray, thomas.hellstrom,
	nishit.sharma, pravalika.gurram

A partial unbind on a DONTNEED BO must succeed because remap remnants
inherit the existing DONTNEED VMA state. A fresh bind on the same BO
must fail with -EBUSY so a new mapping cannot promote purgeable memory
back to WILLNEED.

Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Nishit Sharma <nishit.sharma@intel.com>
Cc: Pravalika Gurram <pravalika.gurram@intel.com>
Signed-off-by: Arvind Yadav <arvind.yadav@intel.com>
---
 tests/intel/xe_madvise.c | 65 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/tests/intel/xe_madvise.c b/tests/intel/xe_madvise.c
index e9bf55ff5..629c5eb06 100644
--- a/tests/intel/xe_madvise.c
+++ b/tests/intel/xe_madvise.c
@@ -14,6 +14,7 @@
 #include "igt.h"
 #include "xe_drm.h"
 
+#include "intel_pat.h"
 #include "xe/xe_ioctl.h"
 #include "xe/xe_query.h"
 #include "lib/igt_syncobj.h"
@@ -768,6 +769,64 @@ out:
 		igt_skip("Unable to induce purge on this platform/config");
 }
 
+/**
+ * SUBTEST: partial-unbind-dontneed
+ * Description: Partial unbind on a DONTNEED BO must succeed; a fresh bind
+ *              on the same DONTNEED BO must be rejected with -EBUSY.
+ * Test category: functionality test
+ */
+static void test_partial_unbind_dontneed(int fd)
+{
+	uint32_t vm, bo;
+	uint64_t addr = PURGEABLE_ADDR;
+	uint64_t addr2 = PURGEABLE_ADDR2;
+	size_t page_size = PURGEABLE_BO_SIZE;
+	size_t bo_size = 2 * PURGEABLE_BO_SIZE;
+	struct drm_xe_sync sync = {
+		.type = DRM_XE_SYNC_TYPE_USER_FENCE,
+		.flags = DRM_XE_SYNC_FLAG_SIGNAL,
+		.timeline_value = PURGEABLE_FENCE_VAL,
+	};
+	uint64_t sync_val = 0;
+	uint32_t retained;
+	int ret;
+
+	vm = xe_vm_create(fd, 0, 0);
+	bo = xe_bo_create(fd, vm, bo_size, vram_if_possible(fd, 0),
+			  DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM);
+
+	sync.addr = to_user_pointer(&sync_val);
+	xe_vm_bind_async(fd, vm, 0, bo, 0, addr, bo_size, &sync, 1);
+	xe_wait_ufence(fd, &sync_val, PURGEABLE_FENCE_VAL, 0, NSEC_PER_SEC);
+
+	/* Mark BO as DONTNEED. */
+	retained = xe_vm_madvise_purgeable(fd, vm, addr, bo_size,
+					   DRM_XE_VMA_PURGEABLE_STATE_DONTNEED);
+	igt_assert_eq(retained, 1);
+
+	/*
+	 * Partial unbind of the first page must succeed. The remap split
+	 * inherits the parent VMA's DONTNEED attr and must not be rejected.
+	 */
+	sync_val = 0;
+	xe_vm_unbind_async(fd, vm, 0, 0, addr, page_size, &sync, 1);
+	xe_wait_ufence(fd, &sync_val, PURGEABLE_FENCE_VAL, 0, NSEC_PER_SEC);
+
+	/*
+	 * A fresh bind on the same DONTNEED BO must be rejected with -EBUSY.
+	 * The kernel must not silently promote a DONTNEED BO back to WILLNEED
+	 * through a new bind.
+	 */
+	sync_val = 0;
+	ret = __xe_vm_bind(fd, vm, 0, bo, 0, addr2, bo_size,
+			   DRM_XE_VM_BIND_OP_MAP, 0, &sync, 1, 0,
+			   DEFAULT_PAT_INDEX, 0);
+	igt_assert_eq(ret, -EBUSY);
+
+	gem_close(fd, bo);
+	xe_vm_destroy(fd, vm);
+}
+
 int igt_main()
 {
 	struct drm_xe_engine_class_instance *hwe;
@@ -822,6 +881,12 @@ int igt_main()
 			break;
 		}
 
+	igt_subtest("partial-unbind-dontneed")
+		xe_for_each_engine(fd, hwe) {
+			test_partial_unbind_dontneed(fd);
+			break;
+		}
+
 	igt_fixture() {
 		xe_device_put(fd);
 		drm_close_driver(fd);
-- 
2.43.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2026-05-11  5:32 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-05-07  6:03 [i-g-t] tests/intel/xe_madvise: Add partial-unbind-dontneed subtest Arvind Yadav
2026-05-07 17:41 ` ✓ i915.CI.BAT: success for " Patchwork
2026-05-07 18:28 ` ✓ Xe.CI.BAT: " Patchwork
2026-05-08  4:31 ` ✗ Xe.CI.FULL: failure " Patchwork
2026-05-08  6:34 ` ✓ i915.CI.Full: success " Patchwork
2026-05-11  5:31 ` [i-g-t] " Sharma, Nishit

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox