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Message-ID: <202111222218.RhruLp7S-lkp@intel.com>
Date: Mon, 22 Nov 2021 22:48:58 +0800
From: kernel test robot <lkp@...el.com>
To: Christophe Leroy <christophe.leroy@...roup.eu>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>, alex@...ti.fr
Cc: kbuild-all@...ts.01.org, linux-mm@...ck.org,
linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/8] powerpc/mm: Make slice specific to book3s/64
Hi Christophe,
I love your patch! Perhaps something to improve:
[auto build test WARNING on powerpc/next]
[also build test WARNING on hnaz-mm/master linus/master v5.16-rc2 next-20211118]
[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]
url: https://github.com/0day-ci/linux/commits/Christophe-Leroy/Convert-powerpc-to-default-topdown-mmap-layout/20211122-165115
base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc64-randconfig-s031-20211122 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 11.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://github.com/0day-ci/linux/commit/1d0b7cc86d08f25f595b52d8c39ba9ca1d29a30a
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Christophe-Leroy/Convert-powerpc-to-default-topdown-mmap-layout/20211122-165115
git checkout 1d0b7cc86d08f25f595b52d8c39ba9ca1d29a30a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
arch/powerpc/mm/book3s64/slice.c: In function 'slice_get_unmapped_area':
>> arch/powerpc/mm/book3s64/slice.c:639:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]
639 | }
| ^
vim +639 arch/powerpc/mm/book3s64/slice.c
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 428
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 429 unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 430 unsigned long flags, unsigned int psize,
34d07177b802e9 arch/powerpc/mm/slice.c Michel Lespinasse 2013-04-29 431 int topdown)
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 432 {
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 433 struct slice_mask good_mask;
f3207c124e7aa8 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-03-22 434 struct slice_mask potential_mask;
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 435 const struct slice_mask *maskp;
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 436 const struct slice_mask *compat_maskp = NULL;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 437 int fixed = (flags & MAP_FIXED);
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 438 int pshift = max_t(int, mmu_psize_defs[psize].shift, PAGE_SHIFT);
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 439 unsigned long page_size = 1UL << pshift;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 440 struct mm_struct *mm = current->mm;
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 441 unsigned long newaddr;
f4ea6dcb08ea2c arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-03-30 442 unsigned long high_limit;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 443
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 444 high_limit = DEFAULT_MAP_WINDOW;
35602f82d0c765 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 445 if (addr >= high_limit || (fixed && (addr + len > high_limit)))
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 446 high_limit = TASK_SIZE;
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 447
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 448 if (len > high_limit)
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 449 return -ENOMEM;
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 450 if (len & (page_size - 1))
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 451 return -EINVAL;
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 452 if (fixed) {
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 453 if (addr & (page_size - 1))
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 454 return -EINVAL;
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 455 if (addr > high_limit - len)
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 456 return -ENOMEM;
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 457 }
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 458
60458fba469a69 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2019-04-17 459 if (high_limit > mm_ctx_slb_addr_limit(&mm->context)) {
5709f7cfd83052 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 460 /*
5709f7cfd83052 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 461 * Increasing the slb_addr_limit does not require
5709f7cfd83052 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 462 * slice mask cache to be recalculated because it should
5709f7cfd83052 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 463 * be already initialised beyond the old address limit.
5709f7cfd83052 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 464 */
60458fba469a69 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2019-04-17 465 mm_ctx_set_slb_addr_limit(&mm->context, high_limit);
54be0b9c7c9888 arch/powerpc/mm/slice.c Michael Ellerman 2018-10-02 466
54be0b9c7c9888 arch/powerpc/mm/slice.c Michael Ellerman 2018-10-02 467 on_each_cpu(slice_flush_segments, mm, 1);
f4ea6dcb08ea2c arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-03-30 468 }
6a72dc038b6152 arch/powerpc/mm/slice.c Nicholas Piggin 2017-11-10 469
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 470 /* Sanity checks */
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 471 BUG_ON(mm->task_size == 0);
60458fba469a69 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2019-04-17 472 BUG_ON(mm_ctx_slb_addr_limit(&mm->context) == 0);
764041e0f43cc7 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2016-04-29 473 VM_BUG_ON(radix_enabled());
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 474
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 475 slice_dbg("slice_get_unmapped_area(mm=%p, psize=%d...\n", mm, psize);
34d07177b802e9 arch/powerpc/mm/slice.c Michel Lespinasse 2013-04-29 476 slice_dbg(" addr=%lx, len=%lx, flags=%lx, topdown=%d\n",
34d07177b802e9 arch/powerpc/mm/slice.c Michel Lespinasse 2013-04-29 477 addr, len, flags, topdown);
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 478
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 479 /* If hint, make sure it matches our alignment restrictions */
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 480 if (!fixed && addr) {
b711531641038f arch/powerpc/mm/slice.c Christophe Leroy 2020-04-20 481 addr = ALIGN(addr, page_size);
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 482 slice_dbg(" aligned addr=%lx\n", addr);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 483 /* Ignore hint if it's too large or overlaps a VMA */
3b4d07d2674f6b arch/powerpc/mm/slice.c Aneesh Kumar K.V 2019-02-26 484 if (addr > high_limit - len || addr < mmap_min_addr ||
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 485 !slice_area_is_free(mm, addr, len))
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 486 addr = 0;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 487 }
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 488
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 489 /* First make up a "good" mask of slices that have the right size
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 490 * already
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 491 */
6f60cc98df2be7 arch/powerpc/mm/slice.c Christophe Leroy 2019-04-25 492 maskp = slice_mask_for_size(&mm->context, psize);
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 493
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 494 /*
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 495 * Here "good" means slices that are already the right page size,
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 496 * "compat" means slices that have a compatible page size (i.e.
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 497 * 4k in a 64k pagesize kernel), and "free" means slices without
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 498 * any VMAs.
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 499 *
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 500 * If MAP_FIXED:
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 501 * check if fits in good | compat => OK
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 502 * check if fits in good | compat | free => convert free
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 503 * else bad
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 504 * If have hint:
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 505 * check if hint fits in good => OK
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 506 * check if hint fits in good | free => convert free
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 507 * Otherwise:
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 508 * search in good, found => OK
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 509 * search in good | free, found => convert free
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 510 * search in good | compat | free, found => convert free.
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 511 */
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 512
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 513 /*
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 514 * If we support combo pages, we can allow 64k pages in 4k slices
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 515 * The mask copies could be avoided in most cases here if we had
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 516 * a pointer to good mask for the next code to use.
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 517 */
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 518 if (IS_ENABLED(CONFIG_PPC_64K_PAGES) && psize == MMU_PAGE_64K) {
6f60cc98df2be7 arch/powerpc/mm/slice.c Christophe Leroy 2019-04-25 519 compat_maskp = slice_mask_for_size(&mm->context, MMU_PAGE_4K);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 520 if (fixed)
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 521 slice_or_mask(&good_mask, maskp, compat_maskp);
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 522 else
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 523 slice_copy_mask(&good_mask, maskp);
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 524 } else {
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 525 slice_copy_mask(&good_mask, maskp);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 526 }
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 527
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 528 slice_print_mask(" good_mask", &good_mask);
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 529 if (compat_maskp)
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 530 slice_print_mask(" compat_mask", compat_maskp);
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 531
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 532 /* First check hint if it's valid or if we have MAP_FIXED */
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 533 if (addr != 0 || fixed) {
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 534 /* Check if we fit in the good mask. If we do, we just return,
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 535 * nothing else to do
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 536 */
ae3066bd1cbe58 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 537 if (slice_check_range_fits(mm, &good_mask, addr, len)) {
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 538 slice_dbg(" fits good !\n");
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 539 newaddr = addr;
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 540 goto return_addr;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 541 }
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 542 } else {
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 543 /* Now let's see if we can find something in the existing
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 544 * slices for that size
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 545 */
830fd2d45aa116 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 546 newaddr = slice_find_area(mm, len, &good_mask,
f4ea6dcb08ea2c arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-03-30 547 psize, topdown, high_limit);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 548 if (newaddr != -ENOMEM) {
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 549 /* Found within the good mask, we don't have to setup,
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 550 * we thus return directly
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 551 */
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 552 slice_dbg(" found area at 0x%lx\n", newaddr);
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 553 goto return_addr;
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 554 }
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 555 }
7a06c66835f75f arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-11-10 556 /*
7a06c66835f75f arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-11-10 557 * We don't fit in the good mask, check what other slices are
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 558 * empty and thus can be converted
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 559 */
7a06c66835f75f arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-11-10 560 slice_mask_for_free(mm, &potential_mask, high_limit);
b8c93549142077 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 561 slice_or_mask(&potential_mask, &potential_mask, &good_mask);
830fd2d45aa116 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 562 slice_print_mask(" potential", &potential_mask);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 563
ae3066bd1cbe58 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 564 if (addr != 0 || fixed) {
ae3066bd1cbe58 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 565 if (slice_check_range_fits(mm, &potential_mask, addr, len)) {
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 566 slice_dbg(" fits potential !\n");
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 567 newaddr = addr;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 568 goto convert;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 569 }
ae3066bd1cbe58 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 570 }
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 571
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 572 /* If we have MAP_FIXED and failed the above steps, then error out */
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 573 if (fixed)
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 574 return -EBUSY;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 575
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 576 slice_dbg(" search...\n");
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 577
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 578 /* If we had a hint that didn't work out, see if we can fit
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 579 * anywhere in the good area.
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 580 */
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 581 if (addr) {
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 582 newaddr = slice_find_area(mm, len, &good_mask,
f4ea6dcb08ea2c arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-03-30 583 psize, topdown, high_limit);
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 584 if (newaddr != -ENOMEM) {
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 585 slice_dbg(" found area at 0x%lx\n", newaddr);
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 586 goto return_addr;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 587 }
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 588 }
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 589
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 590 /* Now let's see if we can find something in the existing slices
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 591 * for that size plus free slices
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 592 */
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 593 newaddr = slice_find_area(mm, len, &potential_mask,
f4ea6dcb08ea2c arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-03-30 594 psize, topdown, high_limit);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 595
203a1fa6286671 arch/powerpc/mm/slice.c Christophe Leroy 2019-04-25 596 if (IS_ENABLED(CONFIG_PPC_64K_PAGES) && newaddr == -ENOMEM &&
203a1fa6286671 arch/powerpc/mm/slice.c Christophe Leroy 2019-04-25 597 psize == MMU_PAGE_64K) {
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 598 /* retry the search with 4k-page slices included */
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 599 slice_or_mask(&potential_mask, &potential_mask, compat_maskp);
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 600 newaddr = slice_find_area(mm, len, &potential_mask,
f4ea6dcb08ea2c arch/powerpc/mm/slice.c Aneesh Kumar K.V 2017-03-30 601 psize, topdown, high_limit);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 602 }
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 603
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 604 if (newaddr == -ENOMEM)
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 605 return -ENOMEM;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 606
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 607 slice_range_to_mask(newaddr, len, &potential_mask);
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 608 slice_dbg(" found potential area at 0x%lx\n", newaddr);
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 609 slice_print_mask(" mask", &potential_mask);
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 610
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 611 convert:
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 612 /*
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 613 * Try to allocate the context before we do slice convert
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 614 * so that we handle the context allocation failure gracefully.
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 615 */
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 616 if (need_extra_context(mm, newaddr)) {
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 617 if (alloc_extended_context(mm, newaddr) < 0)
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 618 return -ENOMEM;
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 619 }
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 620
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 621 slice_andnot_mask(&potential_mask, &potential_mask, &good_mask);
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 622 if (compat_maskp && !fixed)
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 623 slice_andnot_mask(&potential_mask, &potential_mask, compat_maskp);
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 624 if (potential_mask.low_slices ||
db3a528db41caa arch/powerpc/mm/slice.c Christophe Leroy 2018-02-22 625 (SLICE_NUM_HIGH &&
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 626 !bitmap_empty(potential_mask.high_slices, SLICE_NUM_HIGH))) {
d262bd5a739982 arch/powerpc/mm/slice.c Nicholas Piggin 2018-03-07 627 slice_convert(mm, &potential_mask, psize);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 628 if (psize > MMU_PAGE_BASE)
54be0b9c7c9888 arch/powerpc/mm/slice.c Michael Ellerman 2018-10-02 629 on_each_cpu(slice_flush_segments, mm, 1);
3a8247cc2c8569 arch/powerpc/mm/slice.c Paul Mackerras 2008-06-18 630 }
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 631 return newaddr;
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 632
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 633 return_addr:
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 634 if (need_extra_context(mm, newaddr)) {
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 635 if (alloc_extended_context(mm, newaddr) < 0)
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 636 return -ENOMEM;
f384796c40dc55 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 637 }
0dea04b288c066 arch/powerpc/mm/slice.c Aneesh Kumar K.V 2018-03-26 638 return newaddr;
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 @639 }
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 640 EXPORT_SYMBOL_GPL(slice_get_unmapped_area);
d0f13e3c20b6fb arch/powerpc/mm/slice.c Benjamin Herrenschmidt 2007-05-08 641
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