[igt-dev] [PATCH i-g-t v15 12/15] Verify execbuf ok with stale PXP buf in opt-out use

[Alan Previn]

Add a check to verify that reusing a stale protected
buffer in a gem_execbuff call, but using a regular (not-
protected) context will succeed after a teardown event.
Trigger the teardown via the pxp invalidation debugfs
that simulates a HW teardown IRQ.

This ensures that user space applications that choose
not to opt-in for strict PXP teardown awareness (by
using a regular context) won't suffer gem_execbuff
failures if a protected buffer was among the assets
used in any of its rendering operations.

Signed-off-by: Alan Previn <alan.previn.teres.alexis at intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 tests/i915/gem_pxp.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tests/i915/gem_pxp.c b/tests/i915/gem_pxp.c
index 22a2e5a4..8e3bc3cf 100644
--- a/tests/i915/gem_pxp.c
+++ b/tests/i915/gem_pxp.c
@@ -829,6 +829,27 @@ static void test_pxp_stale_buf_execution(int i915)
 	free_exec_assets(i915, &data);
 }
 
+static void test_pxp_stale_buf_optout_execution(int i915)
+{
+	int ret;
+	struct simple_exec_assets data = {0};
+
+	/*
+	 * Use a normal context for testing opt-out behavior
+	 * when executing with a pxp buffer across a teardown event.
+	 */
+	prepare_exec_assets(i915, &data, false, true);
+	ret = gem_execbuf_flush_store_dw(i915, data.ibb, data.ctx, data.fencebuf);
+	igt_assert(ret == 0);
+
+	trigger_pxp_debugfs_forced_teardown(i915);
+
+	ret = gem_execbuf_flush_store_dw(i915, data.ibb, data.ctx, data.fencebuf);
+	igt_assert_f((ret == 0), "Opt-out-execution with stale pxp buffer didn't succeed\n");
+
+	free_exec_assets(i915, &data);
+}
+
 igt_main
 {
 	int i915 = -1;
@@ -922,6 +943,8 @@ igt_main
 			test_pxp_stale_ctx_execution(i915);
 		igt_subtest("verify-pxp-stale-buf-execution")
 			test_pxp_stale_buf_execution(i915);
+		igt_subtest("verify-pxp-stale-buf-optout-execution")
+			test_pxp_stale_buf_optout_execution(i915);
 	}
 
 	igt_fixture {
-- 
2.25.1