Hi Jiandi, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v4.18 next-20180822] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Jiandi-An/drm-ttm-Set-memory-as-decrypted-for-ttm-framebuffer-mappings/20180823-113546 config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=arm All errors (new ones prefixed by >>): drivers/gpu/drm/ttm/ttm_bo_util.c: In function 'ttm_bo_kmap': drivers/gpu/drm/ttm/ttm_bo_util.c:644:15: error: implicit declaration of function 'sev_active'; did you mean 'cpu_active'? [-Werror=implicit-function-declaration] if (!ret && sev_active()) ^~~~~~~~~~ cpu_active >> drivers/gpu/drm/ttm/ttm_bo_util.c:645:4: error: implicit declaration of function 'set_memory_decrypted'; did you mean 'set_memory_rw'? [-Werror=implicit-function-declaration] set_memory_decrypted((unsigned long) map->virtual, ^~~~~~~~~~~~~~~~~~~~ set_memory_rw drivers/gpu/drm/ttm/ttm_bo_util.c: In function 'ttm_bo_kunmap': >> drivers/gpu/drm/ttm/ttm_bo_util.c:670:4: error: implicit declaration of function 'set_memory_encrypted'; did you mean 'set_memory_nx'? [-Werror=implicit-function-declaration] set_memory_encrypted((unsigned long) map->virtual, ^~~~~~~~~~~~~~~~~~~~ set_memory_nx cc1: some warnings being treated as errors vim +645 drivers/gpu/drm/ttm/ttm_bo_util.c 617 618 int ttm_bo_kmap(struct ttm_buffer_object *bo, 619 unsigned long start_page, unsigned long num_pages, 620 struct ttm_bo_kmap_obj *map) 621 { 622 struct ttm_mem_type_manager *man = 623 &bo->bdev->man[bo->mem.mem_type]; 624 unsigned long offset, size; 625 int ret; 626 627 map->virtual = NULL; 628 map->bo = bo; 629 if (num_pages > bo->num_pages) 630 return -EINVAL; 631 if (start_page > bo->num_pages) 632 return -EINVAL; 633 #if 0 634 if (num_pages > 1 && !capable(CAP_SYS_ADMIN)) 635 return -EPERM; 636 #endif 637 (void) ttm_mem_io_lock(man, false); 638 ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); 639 ttm_mem_io_unlock(man); 640 if (ret) 641 return ret; 642 if (!bo->mem.bus.is_iomem) { 643 ret = ttm_bo_kmap_ttm(bo, start_page, num_pages, map); > 644 if (!ret && sev_active()) > 645 set_memory_decrypted((unsigned long) map->virtual, 646 num_pages); 647 return ret; 648 } else { 649 offset = start_page << PAGE_SHIFT; 650 size = num_pages << PAGE_SHIFT; 651 return ttm_bo_ioremap(bo, offset, size, map); 652 } 653 } 654 EXPORT_SYMBOL(ttm_bo_kmap); 655 656 void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) 657 { 658 struct ttm_buffer_object *bo = map->bo; 659 struct ttm_mem_type_manager *man = 660 &bo->bdev->man[bo->mem.mem_type]; 661 662 if (!map->virtual) 663 return; 664 switch (map->bo_kmap_type) { 665 case ttm_bo_map_iomap: 666 iounmap(map->virtual); 667 break; 668 case ttm_bo_map_vmap: 669 if (sev_active()) > 670 set_memory_encrypted((unsigned long) map->virtual, 671 bo->num_pages); 672 vunmap(map->virtual); 673 break; 674 case ttm_bo_map_kmap: 675 if (sev_active()) 676 set_memory_encrypted((unsigned long) map->virtual, 1); 677 kunmap(map->page); 678 break; 679 case ttm_bo_map_premapped: 680 break; 681 default: 682 BUG(); 683 } 684 (void) ttm_mem_io_lock(man, false); 685 ttm_mem_io_free(map->bo->bdev, &map->bo->mem); 686 ttm_mem_io_unlock(man); 687 map->virtual = NULL; 688 map->page = NULL; 689 } 690 EXPORT_SYMBOL(ttm_bo_kunmap); 691 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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