[igt-dev] [PATCH i-g-t v11 11/15] Verify execbuf fails with stale PXP buffer after teardown
From: Alan Previn <hidden>
Date: 2021-09-18 04:54:11
Subsystem:
the rest · Maintainer:
Linus Torvalds
Add a check to verify that reusing a stale protected buffer in a gem_execbuff (with a protected context) after a teardown event fails with -ENOEXEC error. Trigger the teardown via the pxp invalidation debugfs that simulates a HW teardown IRQ. NOTE: The end-to-end architecture requirement includes that any break in the links of the PXP sessions needs to trigger a full teardown and the application needs to be made aware of that allowing it to re-establish the end-to-end pipeline of buffers, contexts and renders again if it chooses to. This stricter behavior targets only contexts created with PXP enabled. Signed-off-by: Alan Previn <redacted> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> --- tests/i915/gem_pxp.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/tests/i915/gem_pxp.c b/tests/i915/gem_pxp.c
index 7d508674..22a2e5a4 100644
--- a/tests/i915/gem_pxp.c
+++ b/tests/i915/gem_pxp.c@@ -796,6 +796,39 @@ static void test_pxp_stale_ctx_execution(int i915) free_exec_assets(i915, &data); } +static void test_pxp_stale_buf_execution(int i915) +{ + int ret; + struct simple_exec_assets data = {0}; + uint32_t ctx2; + struct intel_bb *ibb2; + + /* Use pxp buffers with pxp context for testing for invalidation of protected buffers. */ + prepare_exec_assets(i915, &data, true, true); + ret = gem_execbuf_flush_store_dw(i915, data.ibb, data.ctx, data.fencebuf); + igt_assert(ret == 0); + + trigger_pxp_debugfs_forced_teardown(i915); + + /* + * After teardown, use a new pxp context but reuse the stale bo to ensure + * the kernel is catching the invalidated bo (not context) + */ + ret = create_ctx_with_params(i915, true, true, true, false, &ctx2); + igt_assert_eq(ret, 0); + igt_assert_eq(get_ctx_protected_param(i915, ctx2), 1); + ibb2 = intel_bb_create_with_context(i915, ctx2, 4096); + igt_assert(ibb2); + intel_bb_remove_intel_buf(data.ibb, data.fencebuf); + intel_bb_add_intel_buf(ibb2, data.fencebuf, true); + ret = gem_execbuf_flush_store_dw(i915, ibb2, ctx2, data.fencebuf); + igt_assert_f((ret == -ENOEXEC), "Executing stale pxp buffer didn't fail with -ENOEXEC\n"); + + intel_bb_destroy(ibb2); + gem_context_destroy(i915, ctx2); + free_exec_assets(i915, &data); +} + igt_main { int i915 = -1;
@@ -887,6 +920,8 @@ igt_main test_pxp_pwrcycle_teardown_keychange(i915, &pm); igt_subtest("verify-pxp-stale-ctx-execution") test_pxp_stale_ctx_execution(i915); + igt_subtest("verify-pxp-stale-buf-execution") + test_pxp_stale_buf_execution(i915); } igt_fixture {
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2.25.1