Hi Thomas, kernel test robot noticed the following build errors:
[auto build test ERROR on drm-xe/drm-xe-next] [also build test ERROR on next-20250604] [cannot apply to linus/master v6.15] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Thomas-Hellstr-m/drm-gpusvm-drm-pagemap-Move-migration-functionality-to-drm_pagemap/20250604-173757 base: https://gitlab.freedesktop.org/drm/xe/kernel.git drm-xe-next patch link: https://lore.kernel.org/r/20250604093536.95982-2-thomas.hellstrom%40linux.intel.com patch subject: [PATCH v2 1/3] drm/gpusvm, drm/pagemap: Move migration functionality to drm_pagemap config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20250604/202506042352.xdt1ysbt-...@intel.com/config) compiler: loongarch64-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250604/202506042352.xdt1ysbt-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506042352.xdt1ysbt-...@intel.com/ All error/warnings (new ones prefixed by >>): loongarch64-linux-ld: arch/loongarch/kernel/head.o: relocation R_LARCH_B26 overflow 0xffffffffef55fa70 arch/loongarch/kernel/head.o: in function `smpboot_entry': >> (.ref.text+0x160): relocation truncated to fit: R_LARCH_B26 against symbol >> `start_secondary' defined in .text section in arch/loongarch/kernel/smp.o loongarch64-linux-ld: final link failed: bad value -- >> drivers/gpu/drm/drm_pagemap.c:314: warning: Function parameter or struct >> member 'timeslice_ms' not described in 'drm_pagemap_migrate_to_devmem' vim +314 drivers/gpu/drm/drm_pagemap.c 271 272 273 /** 274 * drm_pagemap_migrate_to_devmem() - Migrate a struct mm_struct range to device memory 275 * @devmem_allocation: The device memory allocation to migrate to. 276 * The caller should hold a reference to the device memory allocation, 277 * and the reference is consumed by this function unless it returns with 278 * an error. 279 * @mm: Pointer to the struct mm_struct. 280 * @start: Start of the virtual address range to migrate. 281 * @end: End of the virtual address range to migrate. 282 * @pgmap_owner: Not used currently, since only system memory is considered. 283 * 284 * This function migrates the specified virtual address range to device memory. 285 * It performs the necessary setup and invokes the driver-specific operations for 286 * migration to device memory. Expected to be called while holding the mmap lock in 287 * at least read mode. 288 * 289 * Return: %0 on success, negative error code on failure. 290 */ 291 292 /* 293 * @range: Pointer to the GPU SVM range structure 294 * @devmem_allocation: Pointer to the device memory allocation. The caller 295 * should hold a reference to the device memory allocation, 296 * which should be dropped via ops->devmem_release or upon 297 * the failure of this function. 298 * @ctx: GPU SVM context 299 * 300 * This function migrates the specified GPU SVM range to device memory. It 301 * performs the necessary setup and invokes the driver-specific operations for 302 * migration to device memory. Upon successful return, @devmem_allocation can 303 * safely reference @range until ops->devmem_release is called which only upon 304 * successful return. Expected to be called while holding the mmap lock in read 305 * mode. 306 * 307 * Return: 0 on success, negative error code on failure. 308 */ 309 int drm_pagemap_migrate_to_devmem(struct drm_pagemap_devmem *devmem_allocation, 310 struct mm_struct *mm, 311 unsigned long start, unsigned long end, 312 unsigned long timeslice_ms, 313 void *pgmap_owner) > 314 { 315 const struct drm_pagemap_devmem_ops *ops = devmem_allocation->ops; 316 struct migrate_vma migrate = { 317 .start = start, 318 .end = end, 319 .pgmap_owner = pgmap_owner, 320 .flags = MIGRATE_VMA_SELECT_SYSTEM, 321 }; 322 unsigned long i, npages = npages_in_range(start, end); 323 struct vm_area_struct *vas; 324 struct drm_pagemap_zdd *zdd = NULL; 325 struct page **pages; 326 dma_addr_t *dma_addr; 327 void *buf; 328 int err; 329 330 mmap_assert_locked(mm); 331 332 if (!ops->populate_devmem_pfn || !ops->copy_to_devmem || 333 !ops->copy_to_ram) 334 return -EOPNOTSUPP; 335 336 vas = vma_lookup(mm, start); 337 if (!vas) { 338 err = -ENOENT; 339 goto err_out; 340 } 341 342 if (end > vas->vm_end || start < vas->vm_start) { 343 err = -EINVAL; 344 goto err_out; 345 } 346 347 if (!vma_is_anonymous(vas)) { 348 err = -EBUSY; 349 goto err_out; 350 } 351 352 buf = kvcalloc(npages, 2 * sizeof(*migrate.src) + sizeof(*dma_addr) + 353 sizeof(*pages), GFP_KERNEL); 354 if (!buf) { 355 err = -ENOMEM; 356 goto err_out; 357 } 358 dma_addr = buf + (2 * sizeof(*migrate.src) * npages); 359 pages = buf + (2 * sizeof(*migrate.src) + sizeof(*dma_addr)) * npages; 360 361 zdd = drm_pagemap_zdd_alloc(pgmap_owner); 362 if (!zdd) { 363 err = -ENOMEM; 364 goto err_free; 365 } 366 367 migrate.vma = vas; 368 migrate.src = buf; 369 migrate.dst = migrate.src + npages; 370 371 err = migrate_vma_setup(&migrate); 372 if (err) 373 goto err_free; 374 375 if (!migrate.cpages) { 376 err = -EFAULT; 377 goto err_free; 378 } 379 380 if (migrate.cpages != npages) { 381 err = -EBUSY; 382 goto err_finalize; 383 } 384 385 err = ops->populate_devmem_pfn(devmem_allocation, npages, migrate.dst); 386 if (err) 387 goto err_finalize; 388 389 err = drm_pagemap_migrate_map_pages(devmem_allocation->dev, dma_addr, 390 migrate.src, npages, DMA_TO_DEVICE); 391 if (err) 392 goto err_finalize; 393 394 for (i = 0; i < npages; ++i) { 395 struct page *page = pfn_to_page(migrate.dst[i]); 396 397 pages[i] = page; 398 migrate.dst[i] = migrate_pfn(migrate.dst[i]); 399 drm_pagemap_get_devmem_page(page, zdd); 400 } 401 402 err = ops->copy_to_devmem(pages, dma_addr, npages); 403 if (err) 404 goto err_finalize; 405 406 /* Upon success bind devmem allocation to range and zdd */ 407 devmem_allocation->timeslice_expiration = get_jiffies_64() + 408 msecs_to_jiffies(timeslice_ms); 409 zdd->devmem_allocation = devmem_allocation; /* Owns ref */ 410 411 err_finalize: 412 if (err) 413 drm_pagemap_migration_unlock_put_pages(npages, migrate.dst); 414 migrate_vma_pages(&migrate); 415 migrate_vma_finalize(&migrate); 416 drm_pagemap_migrate_unmap_pages(devmem_allocation->dev, dma_addr, npages, 417 DMA_TO_DEVICE); 418 err_free: 419 if (zdd) 420 drm_pagemap_zdd_put(zdd); 421 kvfree(buf); 422 err_out: 423 return err; 424 } 425 EXPORT_SYMBOL_GPL(drm_pagemap_migrate_to_devmem); 426 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
