Re: [PATCH v2 05/10] block: add emulation for copy
by kernel test robot
Hi Nitesh,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on axboe-block/for-next]
[also build test WARNING on next-20220207]
[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/Nitesh-Shetty/block-make-bio_map...
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: nios2-randconfig-r001-20220207 (https://download.01.org/0day-ci/archive/20220208/202202081132.axCkiVgv-lk...)
compiler: nios2-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/a7bb30870db803af4ad955a968992222b...
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Nitesh-Shetty/block-make-bio_map_kern-non-static/20220207-231407
git checkout a7bb30870db803af4ad955a968992222bcfb478f
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nios2 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
block/blk-lib.c:185:5: warning: no previous prototype for 'blk_copy_offload' [-Wmissing-prototypes]
185 | int blk_copy_offload(struct block_device *src_bdev, int nr_srcs,
| ^~~~~~~~~~~~~~~~
>> block/blk-lib.c:275:5: warning: no previous prototype for 'blk_submit_rw_buf' [-Wmissing-prototypes]
275 | int blk_submit_rw_buf(struct block_device *bdev, void *buf, sector_t buf_len,
| ^~~~~~~~~~~~~~~~~
vim +/blk_submit_rw_buf +275 block/blk-lib.c
180
181 /*
182 * blk_copy_offload - Use device's native copy offload feature
183 * Go through user provide payload, prepare new payload based on device's copy offload limits.
184 */
> 185 int blk_copy_offload(struct block_device *src_bdev, int nr_srcs,
186 struct range_entry *rlist, struct block_device *dst_bdev, gfp_t gfp_mask)
187 {
188 struct request_queue *sq = bdev_get_queue(src_bdev);
189 struct request_queue *dq = bdev_get_queue(dst_bdev);
190 struct bio *read_bio, *write_bio;
191 struct copy_ctx *ctx;
192 struct cio *cio;
193 struct page *token;
194 sector_t src_blk, copy_len, dst_blk;
195 sector_t remaining, max_copy_len = LONG_MAX;
196 int ri = 0, ret = 0;
197
198 cio = kzalloc(sizeof(struct cio), GFP_KERNEL);
199 if (!cio)
200 return -ENOMEM;
201 atomic_set(&cio->refcount, 0);
202 cio->rlist = rlist;
203
204 max_copy_len = min3(max_copy_len, (sector_t)sq->limits.max_copy_sectors,
205 (sector_t)dq->limits.max_copy_sectors);
206 max_copy_len = min3(max_copy_len, (sector_t)sq->limits.max_copy_range_sectors,
207 (sector_t)dq->limits.max_copy_range_sectors) << SECTOR_SHIFT;
208
209 for (ri = 0; ri < nr_srcs; ri++) {
210 cio->rlist[ri].comp_len = rlist[ri].len;
211 for (remaining = rlist[ri].len, src_blk = rlist[ri].src, dst_blk = rlist[ri].dst;
212 remaining > 0;
213 remaining -= copy_len, src_blk += copy_len, dst_blk += copy_len) {
214 copy_len = min(remaining, max_copy_len);
215
216 token = alloc_page(gfp_mask);
217 if (unlikely(!token)) {
218 ret = -ENOMEM;
219 goto err_token;
220 }
221
222 read_bio = bio_alloc(src_bdev, 1, REQ_OP_READ | REQ_COPY | REQ_NOMERGE,
223 gfp_mask);
224 if (!read_bio) {
225 ret = -ENOMEM;
226 goto err_read_bio;
227 }
228 read_bio->bi_iter.bi_sector = src_blk >> SECTOR_SHIFT;
229 read_bio->bi_iter.bi_size = copy_len;
230 __bio_add_page(read_bio, token, PAGE_SIZE, 0);
231 ret = submit_bio_wait(read_bio);
232 if (ret) {
233 bio_put(read_bio);
234 goto err_read_bio;
235 }
236 bio_put(read_bio);
237 ctx = kzalloc(sizeof(struct copy_ctx), gfp_mask);
238 if (!ctx) {
239 ret = -ENOMEM;
240 goto err_read_bio;
241 }
242 ctx->cio = cio;
243 ctx->range_idx = ri;
244 ctx->start_sec = rlist[ri].src;
245
246 write_bio = bio_alloc(dst_bdev, 1, REQ_OP_WRITE | REQ_COPY | REQ_NOMERGE,
247 gfp_mask);
248 if (!write_bio) {
249 ret = -ENOMEM;
250 goto err_read_bio;
251 }
252
253 write_bio->bi_iter.bi_sector = dst_blk >> SECTOR_SHIFT;
254 write_bio->bi_iter.bi_size = copy_len;
255 __bio_add_page(write_bio, token, PAGE_SIZE, 0);
256 write_bio->bi_end_io = bio_copy_end_io;
257 write_bio->bi_private = ctx;
258 atomic_inc(&cio->refcount);
259 submit_bio(write_bio);
260 }
261 }
262
263 /* Wait for completion of all IO's*/
264 return cio_await_completion(cio);
265
266 err_read_bio:
267 __free_page(token);
268 err_token:
269 rlist[ri].comp_len = min_t(sector_t, rlist[ri].comp_len, (rlist[ri].len - remaining));
270
271 cio->io_err = ret;
272 return cio_await_completion(cio);
273 }
274
> 275 int blk_submit_rw_buf(struct block_device *bdev, void *buf, sector_t buf_len,
276 sector_t sector, unsigned int op, gfp_t gfp_mask)
277 {
278 struct request_queue *q = bdev_get_queue(bdev);
279 struct bio *bio, *parent = NULL;
280 sector_t max_hw_len = min_t(unsigned int, queue_max_hw_sectors(q),
281 queue_max_segments(q) << (PAGE_SHIFT - SECTOR_SHIFT)) << SECTOR_SHIFT;
282 sector_t len, remaining;
283 int ret;
284
285 for (remaining = buf_len; remaining > 0; remaining -= len) {
286 len = min_t(int, max_hw_len, remaining);
287 retry:
288 bio = bio_map_kern(q, buf, len, gfp_mask);
289 if (IS_ERR(bio)) {
290 len >>= 1;
291 if (len)
292 goto retry;
293 return PTR_ERR(bio);
294 }
295
296 bio->bi_iter.bi_sector = sector >> SECTOR_SHIFT;
297 bio->bi_opf = op;
298 bio_set_dev(bio, bdev);
299 bio->bi_end_io = NULL;
300 bio->bi_private = NULL;
301
302 if (parent) {
303 bio_chain(parent, bio);
304 submit_bio(parent);
305 }
306 parent = bio;
307 sector += len;
308 buf = (char *) buf + len;
309 }
310 ret = submit_bio_wait(bio);
311 bio_put(bio);
312
313 return ret;
314 }
315
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
7 months, 2 weeks
[ammarfaizi2-block:google/android/kernel/common/android-gs-raviole-5.10-android12-qpr1-d 2420/8858] arch/arm64/mm/fault.c:594:15: sparse: sparse: incorrect type in assignment (different base types)
by kernel test robot
tree: https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android-gs-raviole-5.10-android12-qpr1-d
head: 9771767708df4fcf51cd1642e041c804a86e740c
commit: 9e4d84273c9d786ee7592970f0a46c1c28eb3c18 [2420/8858] ANDROID: Fix sparse warning in __handle_speculative_fault caused by SPF
config: arm64-randconfig-s031-20220207 (https://download.01.org/0day-ci/archive/20220208/202202081049.0q2EDAfF-lk...)
compiler: aarch64-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/ammarfaizi2/linux-block/commit/9e4d84273c9d786ee759297...
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android-gs-raviole-5.10-android12-qpr1-d
git checkout 9e4d84273c9d786ee7592970f0a46c1c28eb3c18
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/mm/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
sparse warnings: (new ones prefixed by >>)
arch/arm64/mm/fault.c:494:31: sparse: sparse: incorrect type in return expression (different base types) @@ expected int @@ got restricted vm_fault_t @@
arch/arm64/mm/fault.c:494:31: sparse: expected int
arch/arm64/mm/fault.c:494:31: sparse: got restricted vm_fault_t
>> arch/arm64/mm/fault.c:594:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted vm_fault_t [assigned] [usertype] fault @@ got int @@
arch/arm64/mm/fault.c:594:15: sparse: expected restricted vm_fault_t [assigned] [usertype] fault
arch/arm64/mm/fault.c:594:15: sparse: got int
arch/arm64/mm/fault.c:623:13: sparse: sparse: restricted vm_fault_t degrades to integer
arch/arm64/mm/fault.c:623:13: sparse: sparse: restricted vm_fault_t degrades to integer
arch/arm64/mm/fault.c:666:39: sparse: sparse: restricted vm_fault_t degrades to integer
vim +594 arch/arm64/mm/fault.c
c49bd02f4c7412 Anshuman Khandual 2019-06-07 510
1ad9551f1d90e3 Peter Collingbourne 2021-01-22 511 static int __kprobes do_page_fault(unsigned long far, unsigned int esr,
1d18c47c735e8a Catalin Marinas 2012-03-05 512 struct pt_regs *regs)
1d18c47c735e8a Catalin Marinas 2012-03-05 513 {
2d2837fab5fada Eric W. Biederman 2018-09-22 514 const struct fault_info *inf;
61681036004318 Anshuman Khandual 2019-06-03 515 struct mm_struct *mm = current->mm;
6a1bb025d28e10 Peter Xu 2020-08-11 516 vm_fault_t fault;
6cb4d9a2870d20 Anshuman Khandual 2020-04-10 517 unsigned long vm_flags = VM_ACCESS_FLAGS;
dde1607248328c Peter Xu 2020-04-01 518 unsigned int mm_flags = FAULT_FLAG_DEFAULT;
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 519 struct vm_area_struct *vma = NULL;
1ad9551f1d90e3 Peter Collingbourne 2021-01-22 520 unsigned long addr = untagged_addr(far);
db6f41063cbdb5 Will Deacon 2013-07-19 521
b98cca444d287a Anshuman Khandual 2019-07-16 522 if (kprobe_page_fault(regs, esr))
2dd0e8d2d2a157 Sandeepa Prabhu 2016-07-08 523 return 0;
2dd0e8d2d2a157 Sandeepa Prabhu 2016-07-08 524
1d18c47c735e8a Catalin Marinas 2012-03-05 525 /*
1d18c47c735e8a Catalin Marinas 2012-03-05 526 * If we're in an interrupt or have no user context, we must not take
1d18c47c735e8a Catalin Marinas 2012-03-05 527 * the fault.
1d18c47c735e8a Catalin Marinas 2012-03-05 528 */
70ffdb9393a726 David Hildenbrand 2015-05-11 529 if (faulthandler_disabled() || !mm)
1d18c47c735e8a Catalin Marinas 2012-03-05 530 goto no_context;
1d18c47c735e8a Catalin Marinas 2012-03-05 531
759496ba6407c6 Johannes Weiner 2013-09-12 532 if (user_mode(regs))
759496ba6407c6 Johannes Weiner 2013-09-12 533 mm_flags |= FAULT_FLAG_USER;
759496ba6407c6 Johannes Weiner 2013-09-12 534
541ec870ef3143 Mark Rutland 2016-05-31 535 if (is_el0_instruction_abort(esr)) {
759496ba6407c6 Johannes Weiner 2013-09-12 536 vm_flags = VM_EXEC;
01de1776f62e64 Anshuman Khandual 2019-05-05 537 mm_flags |= FAULT_FLAG_INSTRUCTION;
c49bd02f4c7412 Anshuman Khandual 2019-06-07 538 } else if (is_write_abort(esr)) {
759496ba6407c6 Johannes Weiner 2013-09-12 539 vm_flags = VM_WRITE;
759496ba6407c6 Johannes Weiner 2013-09-12 540 mm_flags |= FAULT_FLAG_WRITE;
759496ba6407c6 Johannes Weiner 2013-09-12 541 }
759496ba6407c6 Johannes Weiner 2013-09-12 542
356607f21e6035 Andrey Konovalov 2018-12-28 543 if (is_ttbr0_addr(addr) && is_el1_permission_fault(addr, esr, regs)) {
e19a6ee2460bdd James Morse 2016-06-20 544 /* regs->orig_addr_limit may be 0 if we entered from EL0 */
e19a6ee2460bdd James Morse 2016-06-20 545 if (regs->orig_addr_limit == KERNEL_DS)
c870f14ea115bb Mark Rutland 2018-05-21 546 die_kernel_fault("access to user memory with fs=KERNEL_DS",
c870f14ea115bb Mark Rutland 2018-05-21 547 addr, esr, regs);
705441960033e6 James Morse 2016-02-05 548
9adeb8e72dbfe9 Laura Abbott 2016-08-09 549 if (is_el1_instruction_abort(esr))
c870f14ea115bb Mark Rutland 2018-05-21 550 die_kernel_fault("execution of user memory",
c870f14ea115bb Mark Rutland 2018-05-21 551 addr, esr, regs);
9adeb8e72dbfe9 Laura Abbott 2016-08-09 552
57f4959bad0a15 James Morse 2016-02-05 553 if (!search_exception_tables(regs->pc))
c870f14ea115bb Mark Rutland 2018-05-21 554 die_kernel_fault("access to user memory outside uaccess routines",
c870f14ea115bb Mark Rutland 2018-05-21 555 addr, esr, regs);
57f4959bad0a15 James Morse 2016-02-05 556 }
338d4f49d6f711 James Morse 2015-07-22 557
0e3a9026396cd7 Punit Agrawal 2017-06-08 558 perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
0e3a9026396cd7 Punit Agrawal 2017-06-08 559
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 560 /*
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 561 * let's try a speculative page fault without grabbing the
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 562 * mmap_sem.
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 563 */
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 564 fault = handle_speculative_fault(mm, addr, mm_flags, &vma);
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 565 if (fault != VM_FAULT_RETRY)
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 566 goto done;
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 567
1d18c47c735e8a Catalin Marinas 2012-03-05 568 /*
1d18c47c735e8a Catalin Marinas 2012-03-05 569 * As per x86, we may deadlock here. However, since the kernel only
1d18c47c735e8a Catalin Marinas 2012-03-05 570 * validly references user space from well defined areas of the code,
1d18c47c735e8a Catalin Marinas 2012-03-05 571 * we can bug out early if this is from code which shouldn't.
1d18c47c735e8a Catalin Marinas 2012-03-05 572 */
d8ed45c5dcd455 Michel Lespinasse 2020-06-08 573 if (!mmap_read_trylock(mm)) {
1d18c47c735e8a Catalin Marinas 2012-03-05 574 if (!user_mode(regs) && !search_exception_tables(regs->pc))
1d18c47c735e8a Catalin Marinas 2012-03-05 575 goto no_context;
1d18c47c735e8a Catalin Marinas 2012-03-05 576 retry:
d8ed45c5dcd455 Michel Lespinasse 2020-06-08 577 mmap_read_lock(mm);
1d18c47c735e8a Catalin Marinas 2012-03-05 578 } else {
1d18c47c735e8a Catalin Marinas 2012-03-05 579 /*
1d18c47c735e8a Catalin Marinas 2012-03-05 580 * The above down_read_trylock() might have succeeded in which
1d18c47c735e8a Catalin Marinas 2012-03-05 581 * case, we'll have missed the might_sleep() from down_read().
1d18c47c735e8a Catalin Marinas 2012-03-05 582 */
1d18c47c735e8a Catalin Marinas 2012-03-05 583 might_sleep();
1d18c47c735e8a Catalin Marinas 2012-03-05 584 #ifdef CONFIG_DEBUG_VM
a0509313d5dea0 Anshuman Khandual 2019-06-03 585 if (!user_mode(regs) && !search_exception_tables(regs->pc)) {
d8ed45c5dcd455 Michel Lespinasse 2020-06-08 586 mmap_read_unlock(mm);
1d18c47c735e8a Catalin Marinas 2012-03-05 587 goto no_context;
a0509313d5dea0 Anshuman Khandual 2019-06-03 588 }
1d18c47c735e8a Catalin Marinas 2012-03-05 589 #endif
1d18c47c735e8a Catalin Marinas 2012-03-05 590 }
1d18c47c735e8a Catalin Marinas 2012-03-05 591
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 592 if (!vma || !can_reuse_spf_vma(vma, addr))
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 593 vma = find_vma(mm, addr);
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 @594 fault = __do_page_fault(vma, addr, mm_flags, vm_flags, regs);
1d18c47c735e8a Catalin Marinas 2012-03-05 595
b502f038f2ffc9 Peter Xu 2020-04-01 596 /* Quick path to respond to signals */
b502f038f2ffc9 Peter Xu 2020-04-01 597 if (fault_signal_pending(fault, regs)) {
289d07a2dc6c6b Mark Rutland 2017-07-11 598 if (!user_mode(regs))
289d07a2dc6c6b Mark Rutland 2017-07-11 599 goto no_context;
1d18c47c735e8a Catalin Marinas 2012-03-05 600 return 0;
289d07a2dc6c6b Mark Rutland 2017-07-11 601 }
1d18c47c735e8a Catalin Marinas 2012-03-05 602
b502f038f2ffc9 Peter Xu 2020-04-01 603 if (fault & VM_FAULT_RETRY) {
0e3a9026396cd7 Punit Agrawal 2017-06-08 604 if (mm_flags & FAULT_FLAG_ALLOW_RETRY) {
569ba74a7ba69f Mark Salyzyn 2015-09-21 605 mm_flags |= FAULT_FLAG_TRIED;
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 606
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 607 /*
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 608 * Do not try to reuse this vma and fetch it
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 609 * again since we will release the mmap_sem.
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 610 */
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 611 vma = NULL;
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 612
1d18c47c735e8a Catalin Marinas 2012-03-05 613 goto retry;
1d18c47c735e8a Catalin Marinas 2012-03-05 614 }
1d18c47c735e8a Catalin Marinas 2012-03-05 615 }
d8ed45c5dcd455 Michel Lespinasse 2020-06-08 616 mmap_read_unlock(mm);
1d18c47c735e8a Catalin Marinas 2012-03-05 617
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 618 done:
2fd69fa6bcab98 Mahendran Ganesh 2018-05-04 619
1d18c47c735e8a Catalin Marinas 2012-03-05 620 /*
0e3a9026396cd7 Punit Agrawal 2017-06-08 621 * Handle the "normal" (no error) case first.
1d18c47c735e8a Catalin Marinas 2012-03-05 622 */
1d18c47c735e8a Catalin Marinas 2012-03-05 623 if (likely(!(fault & (VM_FAULT_ERROR | VM_FAULT_BADMAP |
6a1bb025d28e10 Peter Xu 2020-08-11 624 VM_FAULT_BADACCESS))))
1d18c47c735e8a Catalin Marinas 2012-03-05 625 return 0;
1d18c47c735e8a Catalin Marinas 2012-03-05 626
871341023c771a Johannes Weiner 2013-09-12 627 /*
871341023c771a Johannes Weiner 2013-09-12 628 * If we are in kernel mode at this point, we have no context to
871341023c771a Johannes Weiner 2013-09-12 629 * handle this fault with.
871341023c771a Johannes Weiner 2013-09-12 630 */
871341023c771a Johannes Weiner 2013-09-12 631 if (!user_mode(regs))
871341023c771a Johannes Weiner 2013-09-12 632 goto no_context;
871341023c771a Johannes Weiner 2013-09-12 633
1d18c47c735e8a Catalin Marinas 2012-03-05 634 if (fault & VM_FAULT_OOM) {
1d18c47c735e8a Catalin Marinas 2012-03-05 635 /*
1d18c47c735e8a Catalin Marinas 2012-03-05 636 * We ran out of memory, call the OOM killer, and return to
1d18c47c735e8a Catalin Marinas 2012-03-05 637 * userspace (which will retry the fault, or kill us if we got
1d18c47c735e8a Catalin Marinas 2012-03-05 638 * oom-killed).
1d18c47c735e8a Catalin Marinas 2012-03-05 639 */
1d18c47c735e8a Catalin Marinas 2012-03-05 640 pagefault_out_of_memory();
1d18c47c735e8a Catalin Marinas 2012-03-05 641 return 0;
1d18c47c735e8a Catalin Marinas 2012-03-05 642 }
1d18c47c735e8a Catalin Marinas 2012-03-05 643
2d2837fab5fada Eric W. Biederman 2018-09-22 644 inf = esr_to_fault_info(esr);
559d8d91a89cc2 Eric W. Biederman 2018-09-22 645 set_thread_esr(addr, esr);
1d18c47c735e8a Catalin Marinas 2012-03-05 646 if (fault & VM_FAULT_SIGBUS) {
1d18c47c735e8a Catalin Marinas 2012-03-05 647 /*
1d18c47c735e8a Catalin Marinas 2012-03-05 648 * We had some memory, but were unable to successfully fix up
1d18c47c735e8a Catalin Marinas 2012-03-05 649 * this page fault.
1d18c47c735e8a Catalin Marinas 2012-03-05 650 */
1ad9551f1d90e3 Peter Collingbourne 2021-01-22 651 arm64_force_sig_fault(SIGBUS, BUS_ADRERR, far, inf->name);
9ea3a9743cac4f Eric W. Biederman 2018-09-22 652 } else if (fault & (VM_FAULT_HWPOISON_LARGE | VM_FAULT_HWPOISON)) {
9ea3a9743cac4f Eric W. Biederman 2018-09-22 653 unsigned int lsb;
9ea3a9743cac4f Eric W. Biederman 2018-09-22 654
9ea3a9743cac4f Eric W. Biederman 2018-09-22 655 lsb = PAGE_SHIFT;
9ea3a9743cac4f Eric W. Biederman 2018-09-22 656 if (fault & VM_FAULT_HWPOISON_LARGE)
9ea3a9743cac4f Eric W. Biederman 2018-09-22 657 lsb = hstate_index_to_shift(VM_FAULT_GET_HINDEX(fault));
92ff0674f5d801 Will Deacon 2018-02-20 658
1ad9551f1d90e3 Peter Collingbourne 2021-01-22 659 arm64_force_sig_mceerr(BUS_MCEERR_AR, far, lsb, inf->name);
1d18c47c735e8a Catalin Marinas 2012-03-05 660 } else {
1d18c47c735e8a Catalin Marinas 2012-03-05 661 /*
1d18c47c735e8a Catalin Marinas 2012-03-05 662 * Something tried to access memory that isn't in our memory
1d18c47c735e8a Catalin Marinas 2012-03-05 663 * map.
1d18c47c735e8a Catalin Marinas 2012-03-05 664 */
feca355b3d8eba Eric W. Biederman 2018-09-22 665 arm64_force_sig_fault(SIGSEGV,
feca355b3d8eba Eric W. Biederman 2018-09-22 666 fault == VM_FAULT_BADACCESS ? SEGV_ACCERR : SEGV_MAPERR,
1ad9551f1d90e3 Peter Collingbourne 2021-01-22 667 far, inf->name);
1d18c47c735e8a Catalin Marinas 2012-03-05 668 }
1d18c47c735e8a Catalin Marinas 2012-03-05 669
1d18c47c735e8a Catalin Marinas 2012-03-05 670 return 0;
1d18c47c735e8a Catalin Marinas 2012-03-05 671
1d18c47c735e8a Catalin Marinas 2012-03-05 672 no_context:
67ce16ec15ce9d Kristina Martsenko 2017-06-09 673 __do_kernel_fault(addr, esr, regs);
1d18c47c735e8a Catalin Marinas 2012-03-05 674 return 0;
1d18c47c735e8a Catalin Marinas 2012-03-05 675 }
1d18c47c735e8a Catalin Marinas 2012-03-05 676
:::::: The code at line 594 was first introduced by commit
:::::: 2fd69fa6bcab984b56ccfd4860b10f11f1966bed FROMLIST: arm64/mm: add speculative page fault
:::::: TO: Mahendran Ganesh <opensource.ganesh(a)gmail.com>
:::::: CC: Suren Baghdasaryan <surenb(a)google.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
7 months, 2 weeks
