[igt-dev] [PATCH i-g-t 11/16] Verify execbuf fails with stale PXP context after teardown
Alan Previn
alan.previn.teres.alexis at intel.com
Fri May 14 06:49:48 UTC 2021
Add a subtest to verify that reusing a stale protected context
in a gem_execbuff after a teardown (triggered by suspend-resume
cycle) shall fail with -EIO error.
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 <alan.previn.teres.alexis at intel.com>
---
lib/intel_batchbuffer.c | 2 +-
lib/intel_batchbuffer.h | 3 ++
tests/i915/gem_pxp.c | 110 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 114 insertions(+), 1 deletion(-)
diff --git a/lib/intel_batchbuffer.c b/lib/intel_batchbuffer.c
index 23957109..e16ab056 100644
--- a/lib/intel_batchbuffer.c
+++ b/lib/intel_batchbuffer.c
@@ -2536,7 +2536,7 @@ static void update_offsets(struct intel_bb *ibb,
* Note: In this step execobj for bb is allocated and inserted to the objects
* array.
*/
-static int __intel_bb_exec(struct intel_bb *ibb, uint32_t end_offset,
+int __intel_bb_exec(struct intel_bb *ibb, uint32_t end_offset,
uint64_t flags, bool sync)
{
struct drm_i915_gem_execbuffer2 execbuf;
diff --git a/lib/intel_batchbuffer.h b/lib/intel_batchbuffer.h
index 389da7b2..b16ae00f 100644
--- a/lib/intel_batchbuffer.h
+++ b/lib/intel_batchbuffer.h
@@ -664,6 +664,9 @@ uint64_t intel_bb_offset_reloc_to_object(struct intel_bb *ibb,
uint32_t offset,
uint64_t presumed_offset);
+int __intel_bb_exec(struct intel_bb *ibb, uint32_t end_offset,
+ uint64_t flags, bool sync);
+
void intel_bb_dump_cache(struct intel_bb *ibb);
void intel_bb_exec(struct intel_bb *ibb, uint32_t end_offset,
diff --git a/tests/i915/gem_pxp.c b/tests/i915/gem_pxp.c
index 37c38016..1952e230 100644
--- a/tests/i915/gem_pxp.c
+++ b/tests/i915/gem_pxp.c
@@ -37,6 +37,7 @@ IGT_TEST_DESCRIPTION("Test PXP that manages protected content through arbitrated
/* test-configs for power-management triggered protected session teardown */
#define SESSION_PMSUSPEND_TEARDOWN_KEY_CHANGE 1
+#define SESSION_PMSUSPEND_STALEPROTCTX_BAN_EXEC 2
/* Struct and defintions for power management. */
struct powermgt_data {
@@ -611,12 +612,86 @@ static void trigger_powermgt_suspend_cycle(int i915,
igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_SUSPENDED);
}
+#define GFX_OP_PIPE_CONTROL ((3 << 29) | (3 << 27) | (2 << 24))
+#define PIPE_CONTROL_CS_STALL (1 << 20)
+#define PIPE_CONTROL_RENDER_TARGET_FLUSH (1 << 12)
+#define PIPE_CONTROL_FLUSH_ENABLE (1 << 7)
+#define PIPE_CONTROL_DATA_CACHE_INVALIDATE (1 << 5)
+#define PIPE_CONTROL_PROTECTEDPATH_DISABLE (1 << 27)
+#define PIPE_CONTROL_PROTECTEDPATH_ENABLE (1 << 22)
+#define PIPE_CONTROL_POST_SYNC_OP (1 << 14)
+#define PIPE_CONTROL_POST_SYNC_OP_STORE_DW_IDX (1 << 21)
+#define PS_OP_TAG_BEFORE 0x1234fed0
+#define PS_OP_TAG_AFTER 0x5678cbaf
+
+static void emit_pipectrl(struct intel_bb *ibb, struct intel_buf *fenceb, bool before)
+{
+ uint32_t pipe_ctl_flags = 0;
+ uint32_t ps_op_id;
+
+ intel_bb_out(ibb, GFX_OP_PIPE_CONTROL);
+ intel_bb_out(ibb, pipe_ctl_flags);
+
+ if (before)
+ ps_op_id = PS_OP_TAG_BEFORE;
+ else
+ ps_op_id = PS_OP_TAG_AFTER;
+
+ pipe_ctl_flags = (PIPE_CONTROL_FLUSH_ENABLE |
+ PIPE_CONTROL_CS_STALL |
+ PIPE_CONTROL_POST_SYNC_OP);
+ intel_bb_out(ibb, GFX_OP_PIPE_CONTROL | 4);
+ intel_bb_out(ibb, pipe_ctl_flags);
+ intel_bb_emit_reloc(ibb, fenceb->handle, 0, I915_GEM_DOMAIN_COMMAND, (before?0:8), fenceb->addr.offset);
+ intel_bb_out(ibb, ps_op_id);
+ intel_bb_out(ibb, ps_op_id);
+ intel_bb_out(ibb, MI_NOOP);
+ intel_bb_out(ibb, MI_NOOP);
+}
+
+static void assert_pipectl_storedw_done(int i915, uint32_t bo)
+{
+ uint32_t *ptr;
+ uint32_t success_mask = 0x0;
+
+ ptr = gem_mmap__device_coherent(i915, bo, 0, 4096, PROT_READ);
+
+ if (ptr[0] == PS_OP_TAG_BEFORE && ptr[1] == PS_OP_TAG_BEFORE)
+ success_mask |= 0x1;
+
+ igt_assert_eq(success_mask, 0x1);
+ igt_assert(gem_munmap(ptr, 4096) == 0);
+}
+
+static void gem_execbuf_flush_store_dw(int i915, struct intel_bb *ibb,
+ uint32_t ctx, struct intel_buf *fence, int expected_gemexec_response)
+{
+ int execret;
+
+ intel_bb_ptr_set(ibb, 0);
+ intel_bb_add_intel_buf(ibb, fence, true);
+ emit_pipectrl(ibb, fence, true);
+ intel_bb_emit_bbe(ibb);
+ execret = __intel_bb_exec(ibb, intel_bb_offset(ibb),
+ I915_EXEC_RENDER | I915_EXEC_NO_RELOC, false);
+
+ igt_assert_eq(execret, expected_gemexec_response);
+ if (expected_gemexec_response == 0) {
+ gem_sync(ibb->i915, fence->handle);
+ assert_pipectl_storedw_done(i915, fence->handle);
+ }
+}
+
static void test_protected_session_teardown(int i915, uint32_t test_cfg,
struct powermgt_data *pm)
{
uint32_t encrypted_pixels_b4[TSTSURF_SIZE/TSTSURF_BYTESPP];
uint32_t encrypted_pixels_aft[TSTSURF_SIZE/TSTSURF_BYTESPP];
int matched_after_keychange = 0, loop = 0;
+ uint32_t ctx, fencebo;
+ struct intel_buf *fencebuf;
+ struct buf_ops *bops;
+ struct intel_bb *ibb;
switch (test_cfg) {
case SESSION_PMSUSPEND_TEARDOWN_KEY_CHANGE:
@@ -636,6 +711,38 @@ static void test_protected_session_teardown(int i915, uint32_t test_cfg,
igt_assert_eq(matched_after_keychange, 0);
break;
+ case SESSION_PMSUSPEND_STALEPROTCTX_BAN_EXEC:
+ ctx = create_protected_ctx(i915, true, true, true, false, 0);
+ assert_ctx_protected_param(i915, ctx, true);
+
+ /* use normal buffers for testing for invalidation
+ * of protected contexts to ensure kernel is catching
+ * the invalidated context (not buffer)
+ */
+ fencebo = alloc_and_fill_dest_buff(i915, false, 4096, 0);
+
+ ibb = intel_bb_create_with_context(i915, ctx, 4096);
+ igt_assert(ibb);
+
+ bops = buf_ops_create(i915);
+ igt_assert(bops);
+
+ fencebuf = intel_buf_create_using_handle(bops, fencebo, 256, 4,
+ 32, 0, I915_TILING_NONE, 0);
+ intel_bb_add_intel_buf(ibb, fencebuf, true);
+
+ gem_execbuf_flush_store_dw(i915, ibb, ctx, fencebuf, 0);
+ trigger_powermgt_suspend_cycle(i915, pm);
+
+ gem_execbuf_flush_store_dw(i915, ibb, ctx, fencebuf, -EACCES);
+
+ intel_bb_destroy(ibb);
+ intel_buf_destroy(fencebuf);
+ gem_close(i915, fencebo);
+ gem_context_destroy(i915, ctx);
+ buf_ops_destroy(bops);
+ break;
+
default:
igt_info("Skipping unknown power-mgt test_cfg = %d\n", test_cfg);
break;
@@ -732,6 +839,9 @@ igt_main
igt_subtest("verify-pxp-key-change-after-suspend-resume") {
test_protected_session_teardown(i915, SESSION_PMSUSPEND_TEARDOWN_KEY_CHANGE, &pm);
}
+ igt_subtest("reject-old-prot-context-execution-after-suspend-resume") {
+ test_protected_session_teardown(i915, SESSION_PMSUSPEND_STALEPROTCTX_BAN_EXEC, &pm);
+ }
}
igt_fixture {
--
2.25.1
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