If the device does not expose an aperture for indirect access with
detiling functionality, the kernel rejects an attempt to create such a
mapping with -ENODEV. If the ioctl is not supported, we can skip all of
our mmap_gtt specific tests.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Abdiel Janulgue <abdiel.janulgue@xxxxxxxxxxxxxxx>
Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
tests/i915/gem_mmap_gtt.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/tests/i915/gem_mmap_gtt.c b/tests/i915/gem_mmap_gtt.c
index 91da5a37b..7738c47cb 100644
--- a/tests/i915/gem_mmap_gtt.c
+++ b/tests/i915/gem_mmap_gtt.c
@@ -1019,9 +1019,18 @@ igt_main
if (igt_run_in_simulation())
OBJECT_SIZE = 1 * 1024 * 1024;
- igt_fixture
+ igt_fixture {
fd = drm_open_driver(DRIVER_INTEL);
+ /*
+ * If the HW lacks or does not expose an aperture for indirect
+ * detiling access from untrusted userspace to the objects,
+ * the kernel does an early rejection of the mmap_gtt ioctl.
+ */
+ igt_require_f(mmap_ioctl(fd, &arg) != -ENODEV,
+ "HW & kernel support for indirect detiling aperture\n");
+ }
+
igt_subtest("bad-object") {
uint32_t real_handle = gem_create(fd, 4096);
uint32_t handles[20];
--
2.24.0
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