[igt-dev] [PATCH i-g-t 14/17] Verify execbuf ok with stale prot-buff and regular context

[Rodrigo Vivi]

On Tue, May 18, 2021 at 03:33:41AM -0700, Alan Previn wrote:
> Add a check to verify that reusing a stale protected
> buffer in a gem_execbuff call, but using a regular (not-
> protcted) context will succeed despite after a teardown
       ^ typo

with this fixed:
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

> (triggered by suspend-resume cycle).
> 
> 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.
> 
> Reuse the existing subtest to minimize the number
> of suspend resume cycles we take.
> 
> Signed-off-by: Alan Previn <alan.previn.teres.alexis at intel.com>
> ---
>  tests/i915/gem_pxp.c | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/i915/gem_pxp.c b/tests/i915/gem_pxp.c
> index b4f369ae..e3c21c70 100644
> --- a/tests/i915/gem_pxp.c
> +++ b/tests/i915/gem_pxp.c
> @@ -760,7 +760,7 @@ static void free_exec_assets(int i915, struct simple_exec_assets *data)
>  static void test_pxp_pwrcycle_staleasset_execution(int i915, struct powermgt_data *pm)
>  {
>  	int ret;
> -	struct simple_exec_assets data[2] = {{0}, {0}};
> +	struct simple_exec_assets data[3] = {{0}, {0}, {0}};
>  	uint32_t ctx2;
>  	struct intel_bb *ibb2;
>  
> @@ -777,6 +777,15 @@ static void test_pxp_pwrcycle_staleasset_execution(int i915, struct powermgt_dat
>  	ret = gem_execbuf_flush_store_dw(i915, data[1].ibb, data[1].ctx, data[1].fencebuf);
>  	igt_assert(ret == 0);
>  
> +	/*
> +	 * For data[2]: Use non-pxp contexts but with protected buffers
> +	 * to verify the "pxp-execution-opt-in" expectation where
> +	 * execution will run without error (not buffer)
> +	 */
> +	prepare_exec_assets(i915, &data[2], false, true);
> +	ret = gem_execbuf_flush_store_dw(i915, data[2].ibb, data[2].ctx, data[2].fencebuf);
> +	igt_assert(ret == 0);
> +
>  	trigger_powermgt_suspend_cycle(i915, pm);
>  
>  	ret = gem_execbuf_flush_store_dw(i915, data[0].ibb, data[0].ctx, data[0].fencebuf);
> @@ -797,8 +806,12 @@ static void test_pxp_pwrcycle_staleasset_execution(int i915, struct powermgt_dat
>  	ret = gem_execbuf_flush_store_dw(i915, ibb2, ctx2, data[1].fencebuf);
>  	igt_assert_f((ret == -ENOEXEC), "Executing stale pxp buffer didn't fail with -ENOEXEC\n");
>  
> +	ret = gem_execbuf_flush_store_dw(i915, data[2].ibb, data[2].ctx, data[2].fencebuf);
> +	igt_assert_f((ret == 0), "Opt-out-execution with stale pxp buffer didn't succeed\n");
> +
>  	free_exec_assets(i915, &data[0]);
>  	free_exec_assets(i915, &data[1]);
> +	free_exec_assets(i915, &data[2]);
>  }
>  
>  igt_main
> -- 
> 2.25.1
> 
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