[PATCH i-g-t v2 2/7] lib/xe_spin: account for prefetch

[Matthew Auld]

Xe2 expects an extra page after the batch to avoid prefetch hitting an
invalid page. Not doing so can result in CAT errors.

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
---
 lib/xe/xe_spin.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/xe/xe_spin.c b/lib/xe/xe_spin.c
index 243e97047..2c531e85e 100644
--- a/lib/xe/xe_spin.c
+++ b/lib/xe/xe_spin.c
@@ -186,7 +186,7 @@ void xe_spin_end(struct xe_spin *spin)
 igt_spin_t *
 xe_spin_create(int fd, const struct igt_spin_factory *opt)
 {
-	size_t bo_size = xe_get_default_alignment(fd);
+	size_t bo_size = xe_bb_size(fd, SZ_4K);
 	uint64_t ahnd = opt->ahnd, addr;
 	struct igt_spin *spin;
 	struct xe_spin *xe_spin;
@@ -285,7 +285,7 @@ void xe_cork_init(int fd, struct drm_xe_engine_class_instance *hwe,
 		  struct xe_cork *cork)
 {
 	uint64_t addr = xe_get_default_alignment(fd);
-	size_t bo_size = xe_get_default_alignment(fd);
+	size_t bo_size = xe_bb_size(fd, SZ_4K);
 	uint32_t vm, bo, exec_queue, syncobj;
 	struct xe_spin *spin;
 	struct drm_xe_sync sync = {
-- 
2.43.0