BCC: [email protected] CC: [email protected] CC: [email protected] TO: Matthew Brost <[email protected]> CC: John Harrison <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: b90cb1053190353cc30f0fef0ef1f378ccc063c5 commit: 4eb61ddc1b67dcb450d3ddbcfef8dfe2c4279a45 drm/i915: Enable multi-bb execbuf date: 11 months ago :::::: branch date: 11 hours ago :::::: commit date: 11 months ago config: i386-randconfig-m021-20220829 (https://download.01.org/0day-ci/archive/20220829/[email protected]/config) compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> New smatch warnings: drivers/gpu/drm/i915/gem/i915_gem_context.c:638 set_proto_ctx_engines_parallel_submit() warn: potential spectre issue 'ext->engines' [w] drivers/gpu/drm/i915/gem/i915_gem_context.c:643 set_proto_ctx_engines_parallel_submit() warn: potential spectre issue 'siblings' [w] Old smatch warnings: drivers/gpu/drm/i915/gem/i915_gem_context.h:218 i915_gem_context_get_engine() warn: inconsistent indenting drivers/gpu/drm/i915/gem/i915_gem_context.h:220 i915_gem_context_get_engine() warn: inconsistent indenting drivers/gpu/drm/i915/gem/i915_gem_context.c:623 set_proto_ctx_engines_parallel_submit() warn: check for integer overflow 'num_siblings' drivers/gpu/drm/i915/gem/i915_gem_context.c:623 set_proto_ctx_engines_parallel_submit() warn: check for integer overflow 'width' drivers/gpu/drm/i915/gem/i915_gem_context.c:671 set_proto_ctx_engines_parallel_submit() error: uninitialized symbol 'prev_mask'. drivers/gpu/drm/i915/gem/i915_gem_context.c:817 set_proto_ctx_sseu() warn: potential spectre issue 'pc->user_engines' [r] (local cap) vim +638 drivers/gpu/drm/i915/gem/i915_gem_context.c d4433c7600f794 Jason Ekstrand 2021-07-08 558 e5e32171a2cf1e Matthew Brost 2021-10-14 559 static int e5e32171a2cf1e Matthew Brost 2021-10-14 560 set_proto_ctx_engines_parallel_submit(struct i915_user_extension __user *base, e5e32171a2cf1e Matthew Brost 2021-10-14 561 void *data) e5e32171a2cf1e Matthew Brost 2021-10-14 562 { e5e32171a2cf1e Matthew Brost 2021-10-14 563 struct i915_context_engines_parallel_submit __user *ext = e5e32171a2cf1e Matthew Brost 2021-10-14 564 container_of_user(base, typeof(*ext), base); e5e32171a2cf1e Matthew Brost 2021-10-14 565 const struct set_proto_ctx_engines *set = data; e5e32171a2cf1e Matthew Brost 2021-10-14 566 struct drm_i915_private *i915 = set->i915; e5e32171a2cf1e Matthew Brost 2021-10-14 567 u64 flags; e5e32171a2cf1e Matthew Brost 2021-10-14 568 int err = 0, n, i, j; e5e32171a2cf1e Matthew Brost 2021-10-14 569 u16 slot, width, num_siblings; e5e32171a2cf1e Matthew Brost 2021-10-14 570 struct intel_engine_cs **siblings = NULL; e5e32171a2cf1e Matthew Brost 2021-10-14 571 intel_engine_mask_t prev_mask; e5e32171a2cf1e Matthew Brost 2021-10-14 572 e5e32171a2cf1e Matthew Brost 2021-10-14 573 /* FIXME: This is NIY for execlists */ e5e32171a2cf1e Matthew Brost 2021-10-14 574 if (!(intel_uc_uses_guc_submission(&i915->gt.uc))) e5e32171a2cf1e Matthew Brost 2021-10-14 575 return -ENODEV; e5e32171a2cf1e Matthew Brost 2021-10-14 576 e5e32171a2cf1e Matthew Brost 2021-10-14 577 if (get_user(slot, &ext->engine_index)) e5e32171a2cf1e Matthew Brost 2021-10-14 578 return -EFAULT; e5e32171a2cf1e Matthew Brost 2021-10-14 579 e5e32171a2cf1e Matthew Brost 2021-10-14 580 if (get_user(width, &ext->width)) e5e32171a2cf1e Matthew Brost 2021-10-14 581 return -EFAULT; e5e32171a2cf1e Matthew Brost 2021-10-14 582 e5e32171a2cf1e Matthew Brost 2021-10-14 583 if (get_user(num_siblings, &ext->num_siblings)) e5e32171a2cf1e Matthew Brost 2021-10-14 584 return -EFAULT; e5e32171a2cf1e Matthew Brost 2021-10-14 585 e5e32171a2cf1e Matthew Brost 2021-10-14 586 if (slot >= set->num_engines) { e5e32171a2cf1e Matthew Brost 2021-10-14 587 drm_dbg(&i915->drm, "Invalid placement value, %d >= %d\n", e5e32171a2cf1e Matthew Brost 2021-10-14 588 slot, set->num_engines); e5e32171a2cf1e Matthew Brost 2021-10-14 589 return -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 590 } e5e32171a2cf1e Matthew Brost 2021-10-14 591 e5e32171a2cf1e Matthew Brost 2021-10-14 592 if (set->engines[slot].type != I915_GEM_ENGINE_TYPE_INVALID) { e5e32171a2cf1e Matthew Brost 2021-10-14 593 drm_dbg(&i915->drm, e5e32171a2cf1e Matthew Brost 2021-10-14 594 "Invalid placement[%d], already occupied\n", slot); e5e32171a2cf1e Matthew Brost 2021-10-14 595 return -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 596 } e5e32171a2cf1e Matthew Brost 2021-10-14 597 e5e32171a2cf1e Matthew Brost 2021-10-14 598 if (get_user(flags, &ext->flags)) e5e32171a2cf1e Matthew Brost 2021-10-14 599 return -EFAULT; e5e32171a2cf1e Matthew Brost 2021-10-14 600 e5e32171a2cf1e Matthew Brost 2021-10-14 601 if (flags) { e5e32171a2cf1e Matthew Brost 2021-10-14 602 drm_dbg(&i915->drm, "Unknown flags 0x%02llx", flags); e5e32171a2cf1e Matthew Brost 2021-10-14 603 return -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 604 } e5e32171a2cf1e Matthew Brost 2021-10-14 605 e5e32171a2cf1e Matthew Brost 2021-10-14 606 for (n = 0; n < ARRAY_SIZE(ext->mbz64); n++) { e5e32171a2cf1e Matthew Brost 2021-10-14 607 err = check_user_mbz(&ext->mbz64[n]); e5e32171a2cf1e Matthew Brost 2021-10-14 608 if (err) e5e32171a2cf1e Matthew Brost 2021-10-14 609 return err; e5e32171a2cf1e Matthew Brost 2021-10-14 610 } e5e32171a2cf1e Matthew Brost 2021-10-14 611 e5e32171a2cf1e Matthew Brost 2021-10-14 612 if (width < 2) { e5e32171a2cf1e Matthew Brost 2021-10-14 613 drm_dbg(&i915->drm, "Width (%d) < 2\n", width); e5e32171a2cf1e Matthew Brost 2021-10-14 614 return -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 615 } e5e32171a2cf1e Matthew Brost 2021-10-14 616 e5e32171a2cf1e Matthew Brost 2021-10-14 617 if (num_siblings < 1) { e5e32171a2cf1e Matthew Brost 2021-10-14 618 drm_dbg(&i915->drm, "Number siblings (%d) < 1\n", e5e32171a2cf1e Matthew Brost 2021-10-14 619 num_siblings); e5e32171a2cf1e Matthew Brost 2021-10-14 620 return -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 621 } e5e32171a2cf1e Matthew Brost 2021-10-14 622 e5e32171a2cf1e Matthew Brost 2021-10-14 623 siblings = kmalloc_array(num_siblings * width, e5e32171a2cf1e Matthew Brost 2021-10-14 624 sizeof(*siblings), e5e32171a2cf1e Matthew Brost 2021-10-14 625 GFP_KERNEL); e5e32171a2cf1e Matthew Brost 2021-10-14 626 if (!siblings) e5e32171a2cf1e Matthew Brost 2021-10-14 627 return -ENOMEM; e5e32171a2cf1e Matthew Brost 2021-10-14 628 e5e32171a2cf1e Matthew Brost 2021-10-14 629 /* Create contexts / engines */ e5e32171a2cf1e Matthew Brost 2021-10-14 630 for (i = 0; i < width; ++i) { e5e32171a2cf1e Matthew Brost 2021-10-14 631 intel_engine_mask_t current_mask = 0; e5e32171a2cf1e Matthew Brost 2021-10-14 632 struct i915_engine_class_instance prev_engine; e5e32171a2cf1e Matthew Brost 2021-10-14 633 e5e32171a2cf1e Matthew Brost 2021-10-14 634 for (j = 0; j < num_siblings; ++j) { e5e32171a2cf1e Matthew Brost 2021-10-14 635 struct i915_engine_class_instance ci; e5e32171a2cf1e Matthew Brost 2021-10-14 636 e5e32171a2cf1e Matthew Brost 2021-10-14 637 n = i * num_siblings + j; e5e32171a2cf1e Matthew Brost 2021-10-14 @638 if (copy_from_user(&ci, &ext->engines[n], sizeof(ci))) { e5e32171a2cf1e Matthew Brost 2021-10-14 639 err = -EFAULT; e5e32171a2cf1e Matthew Brost 2021-10-14 640 goto out_err; e5e32171a2cf1e Matthew Brost 2021-10-14 641 } e5e32171a2cf1e Matthew Brost 2021-10-14 642 e5e32171a2cf1e Matthew Brost 2021-10-14 @643 siblings[n] = e5e32171a2cf1e Matthew Brost 2021-10-14 644 intel_engine_lookup_user(i915, ci.engine_class, e5e32171a2cf1e Matthew Brost 2021-10-14 645 ci.engine_instance); e5e32171a2cf1e Matthew Brost 2021-10-14 646 if (!siblings[n]) { e5e32171a2cf1e Matthew Brost 2021-10-14 647 drm_dbg(&i915->drm, e5e32171a2cf1e Matthew Brost 2021-10-14 648 "Invalid sibling[%d]: { class:%d, inst:%d }\n", e5e32171a2cf1e Matthew Brost 2021-10-14 649 n, ci.engine_class, ci.engine_instance); e5e32171a2cf1e Matthew Brost 2021-10-14 650 err = -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 651 goto out_err; e5e32171a2cf1e Matthew Brost 2021-10-14 652 } e5e32171a2cf1e Matthew Brost 2021-10-14 653 e5e32171a2cf1e Matthew Brost 2021-10-14 654 if (n) { e5e32171a2cf1e Matthew Brost 2021-10-14 655 if (prev_engine.engine_class != e5e32171a2cf1e Matthew Brost 2021-10-14 656 ci.engine_class) { e5e32171a2cf1e Matthew Brost 2021-10-14 657 drm_dbg(&i915->drm, e5e32171a2cf1e Matthew Brost 2021-10-14 658 "Mismatched class %d, %d\n", e5e32171a2cf1e Matthew Brost 2021-10-14 659 prev_engine.engine_class, e5e32171a2cf1e Matthew Brost 2021-10-14 660 ci.engine_class); e5e32171a2cf1e Matthew Brost 2021-10-14 661 err = -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 662 goto out_err; e5e32171a2cf1e Matthew Brost 2021-10-14 663 } e5e32171a2cf1e Matthew Brost 2021-10-14 664 } e5e32171a2cf1e Matthew Brost 2021-10-14 665 e5e32171a2cf1e Matthew Brost 2021-10-14 666 prev_engine = ci; e5e32171a2cf1e Matthew Brost 2021-10-14 667 current_mask |= siblings[n]->logical_mask; e5e32171a2cf1e Matthew Brost 2021-10-14 668 } e5e32171a2cf1e Matthew Brost 2021-10-14 669 e5e32171a2cf1e Matthew Brost 2021-10-14 670 if (i > 0) { e5e32171a2cf1e Matthew Brost 2021-10-14 671 if (current_mask != prev_mask << 1) { e5e32171a2cf1e Matthew Brost 2021-10-14 672 drm_dbg(&i915->drm, e5e32171a2cf1e Matthew Brost 2021-10-14 673 "Non contiguous logical mask 0x%x, 0x%x\n", e5e32171a2cf1e Matthew Brost 2021-10-14 674 prev_mask, current_mask); e5e32171a2cf1e Matthew Brost 2021-10-14 675 err = -EINVAL; e5e32171a2cf1e Matthew Brost 2021-10-14 676 goto out_err; e5e32171a2cf1e Matthew Brost 2021-10-14 677 } e5e32171a2cf1e Matthew Brost 2021-10-14 678 } e5e32171a2cf1e Matthew Brost 2021-10-14 679 prev_mask = current_mask; e5e32171a2cf1e Matthew Brost 2021-10-14 680 } e5e32171a2cf1e Matthew Brost 2021-10-14 681 e5e32171a2cf1e Matthew Brost 2021-10-14 682 set->engines[slot].type = I915_GEM_ENGINE_TYPE_PARALLEL; e5e32171a2cf1e Matthew Brost 2021-10-14 683 set->engines[slot].num_siblings = num_siblings; e5e32171a2cf1e Matthew Brost 2021-10-14 684 set->engines[slot].width = width; e5e32171a2cf1e Matthew Brost 2021-10-14 685 set->engines[slot].siblings = siblings; e5e32171a2cf1e Matthew Brost 2021-10-14 686 e5e32171a2cf1e Matthew Brost 2021-10-14 687 return 0; e5e32171a2cf1e Matthew Brost 2021-10-14 688 e5e32171a2cf1e Matthew Brost 2021-10-14 689 out_err: e5e32171a2cf1e Matthew Brost 2021-10-14 690 kfree(siblings); e5e32171a2cf1e Matthew Brost 2021-10-14 691 e5e32171a2cf1e Matthew Brost 2021-10-14 692 return err; e5e32171a2cf1e Matthew Brost 2021-10-14 693 } e5e32171a2cf1e Matthew Brost 2021-10-14 694 :::::: The code at line 638 was first introduced by commit :::::: e5e32171a2cf1e434d4f88e12467f3e47d0ec618 drm/i915/guc: Connect UAPI to GuC multi-lrc interface :::::: TO: Matthew Brost <[email protected]> :::::: CC: John Harrison <[email protected]> -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
