Simply check that we support parsing of batches as large as the uAPI
allows.

Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuopp...@linux.intel.com>
---
 tests/i915/gen9_exec_parse.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/tests/i915/gen9_exec_parse.c b/tests/i915/gen9_exec_parse.c
index 8cd82f568..db291d17b 100644
--- a/tests/i915/gen9_exec_parse.c
+++ b/tests/i915/gen9_exec_parse.c
@@ -566,6 +566,30 @@ static void test_bb_start(const int i915, const uint32_t 
handle, int test)
        gem_close(i915, target_bo);
 }
 
+static void test_bb_large(int i915)
+{
+       const uint32_t bbe = MI_BATCH_BUFFER_END;
+       uint32_t size = (1ull << 32) - 4096;
+       struct drm_i915_gem_exec_object2 obj = {
+               .handle = gem_create(i915, size),
+       };
+       struct drm_i915_gem_execbuffer2 execbuf = {
+               .buffers_ptr = to_user_pointer(&obj),
+               .buffer_count = 1,
+               .flags = I915_EXEC_BLT,
+       };
+
+       intel_require_memory(2, size, CHECK_RAM);
+
+       gem_write(i915, obj.handle, size - 64, &bbe, sizeof(bbe));
+       igt_assert_eq(__checked_execbuf(i915, &execbuf), 0);
+
+       execbuf.batch_start_offset = size - 64;
+       igt_assert_eq(__checked_execbuf(i915, &execbuf), 0);
+
+       gem_close(i915, obj.handle);
+}
+
 static void test_bb_chained(const int i915, const uint32_t handle)
 {
        const uint32_t batch[] = {
@@ -1053,6 +1077,9 @@ igt_main
        igt_subtest("bb-start-far")
                test_bb_start(i915, handle, BB_START_FAR);
 
+       igt_subtest("bb-large")
+               test_bb_large(i915);
+
        igt_fixture {
                igt_stop_hang_detector();
                gem_close(i915, handle);
-- 
2.28.0

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