arch/loongarch/kernel/signal.c:370:47: sparse: sparse: incorrect type in initializer (different address spaces)

From: kernel test robot
Date: Thu Nov 30 2023 - 21:09:07 EST

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In reply to: kernel test robot: "arch/loongarch/kernel/signal.c:370:47: sparse: sparse: incorrect type in initializer (different address spaces)"
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 2594faafeee2f4406ff82790604e4e3f55037d60
commit: 616500232e632dba8b03981eeccadacf2fbf1c30 LoongArch: Add vector extensions support
date: 5 months ago
config: loongarch-randconfig-r034-20230511 (https://download.01.org/0day-ci/archive/20231201/202312011002.Ruq1PBC9-lkp@xxxxxxxxx/config)
compiler: loongarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20231201/202312011002.Ruq1PBC9-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312011002.Ruq1PBC9-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
arch/loongarch/kernel/signal.c:94:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:94:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:94:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:94:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:114:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:114:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:114:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:114:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:132:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:132:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:132:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:132:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:153:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:153:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:153:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:153:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:173:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:173:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:173:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:173:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:198:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:198:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:198:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:198:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:223:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:223:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:223:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:223:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:232:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:232:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:232:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:232:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:241:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:241:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:241:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:241:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:250:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:250:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:250:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:250:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:259:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:259:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:259:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:259:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:268:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:268:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:268:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:268:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:300:52: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info *addr @@
arch/loongarch/kernel/signal.c:300:52: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:300:52: sparse: got struct sctx_info *addr
arch/loongarch/kernel/signal.c:301:92: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sctx_info *info @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:301:92: sparse: expected struct sctx_info *info
arch/loongarch/kernel/signal.c:301:92: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:301:47: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:301:47: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct fpu_context [noderef] __user *fpu_ctx @@ got struct fpu_context * @@
arch/loongarch/kernel/signal.c:301:47: sparse: expected struct fpu_context [noderef] __user *fpu_ctx
arch/loongarch/kernel/signal.c:301:47: sparse: got struct fpu_context *
arch/loongarch/kernel/signal.c:302:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:302:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:302:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:302:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:334:52: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info *addr @@
arch/loongarch/kernel/signal.c:334:52: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:334:52: sparse: got struct sctx_info *addr
arch/loongarch/kernel/signal.c:335:92: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sctx_info *info @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:335:92: sparse: expected struct sctx_info *info
arch/loongarch/kernel/signal.c:335:92: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:335:47: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:335:47: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct fpu_context [noderef] __user *fpu_ctx @@ got struct fpu_context * @@
arch/loongarch/kernel/signal.c:335:47: sparse: expected struct fpu_context [noderef] __user *fpu_ctx
arch/loongarch/kernel/signal.c:335:47: sparse: got struct fpu_context *
arch/loongarch/kernel/signal.c:336:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:336:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:336:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:336:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:369:52: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info *addr @@
arch/loongarch/kernel/signal.c:369:52: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:369:52: sparse: got struct sctx_info *addr
arch/loongarch/kernel/signal.c:370:92: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sctx_info *info @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:370:92: sparse: expected struct sctx_info *info
arch/loongarch/kernel/signal.c:370:92: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:370:47: sparse: sparse: cast removes address space '__user' of expression
>> arch/loongarch/kernel/signal.c:370:47: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct lsx_context [noderef] __user *lsx_ctx @@ got struct lsx_context * @@
arch/loongarch/kernel/signal.c:370:47: sparse: expected struct lsx_context [noderef] __user *lsx_ctx
arch/loongarch/kernel/signal.c:370:47: sparse: got struct lsx_context *
arch/loongarch/kernel/signal.c:371:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:371:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:371:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:371:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:406:52: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info *addr @@
arch/loongarch/kernel/signal.c:406:52: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:406:52: sparse: got struct sctx_info *addr
arch/loongarch/kernel/signal.c:407:92: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sctx_info *info @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:407:92: sparse: expected struct sctx_info *info
arch/loongarch/kernel/signal.c:407:92: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:407:47: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:407:47: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct lsx_context [noderef] __user *lsx_ctx @@ got struct lsx_context * @@
arch/loongarch/kernel/signal.c:407:47: sparse: expected struct lsx_context [noderef] __user *lsx_ctx
arch/loongarch/kernel/signal.c:407:47: sparse: got struct lsx_context *
arch/loongarch/kernel/signal.c:408:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:408:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:408:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:408:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:444:53: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info *addr @@
arch/loongarch/kernel/signal.c:444:53: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:444:53: sparse: got struct sctx_info *addr
arch/loongarch/kernel/signal.c:446:64: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sctx_info *info @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:446:64: sparse: expected struct sctx_info *info
arch/loongarch/kernel/signal.c:446:64: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:446:18: sparse: sparse: cast removes address space '__user' of expression
>> arch/loongarch/kernel/signal.c:446:18: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct lasx_context [noderef] __user *lasx_ctx @@ got struct lasx_context * @@
arch/loongarch/kernel/signal.c:446:18: sparse: expected struct lasx_context [noderef] __user *lasx_ctx
arch/loongarch/kernel/signal.c:446:18: sparse: got struct lasx_context *
arch/loongarch/kernel/signal.c:447:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:447:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:447:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:447:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:484:53: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info *addr @@
arch/loongarch/kernel/signal.c:484:53: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:484:53: sparse: got struct sctx_info *addr
arch/loongarch/kernel/signal.c:486:64: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sctx_info *info @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:486:64: sparse: expected struct sctx_info *info
arch/loongarch/kernel/signal.c:486:64: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:486:18: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:486:18: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct lasx_context [noderef] __user *lasx_ctx @@ got struct lasx_context * @@
arch/loongarch/kernel/signal.c:486:18: sparse: expected struct lasx_context [noderef] __user *lasx_ctx
arch/loongarch/kernel/signal.c:486:18: sparse: got struct lasx_context *
arch/loongarch/kernel/signal.c:487:36: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:487:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *regs @@ got unsigned long long [usertype] * @@
arch/loongarch/kernel/signal.c:487:36: sparse: expected unsigned long long [noderef] [usertype] __user *regs
arch/loongarch/kernel/signal.c:487:36: sparse: got unsigned long long [usertype] *
arch/loongarch/kernel/signal.c:543:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info * @@
arch/loongarch/kernel/signal.c:543:14: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:543:14: sparse: got struct sctx_info *
arch/loongarch/kernel/signal.c:570:42: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sctx_info *addr @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:570:42: sparse: expected struct sctx_info *addr
arch/loongarch/kernel/signal.c:570:42: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:577:42: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sctx_info *addr @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:577:42: sparse: expected struct sctx_info *addr
arch/loongarch/kernel/signal.c:577:42: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:584:43: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sctx_info *addr @@ got struct sctx_info [noderef] __user *info @@
arch/loongarch/kernel/signal.c:584:43: sparse: expected struct sctx_info *addr
arch/loongarch/kernel/signal.c:584:43: sparse: got struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:591:46: sparse: sparse: cast removes address space '__user' of expression
arch/loongarch/kernel/signal.c:591:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sctx_info [noderef] __user *info @@ got struct sctx_info * @@
arch/loongarch/kernel/signal.c:591:22: sparse: expected struct sctx_info [noderef] __user *info
arch/loongarch/kernel/signal.c:591:22: sparse: got struct sctx_info *
arch/loongarch/kernel/signal.c:737:17: sparse: sparse: symbol 'sys_rt_sigreturn' was not declared. Should it be static?
arch/loongarch/kernel/signal.c: note: in included file:
arch/loongarch/include/asm/fpu.h:72:17: sparse: sparse: undefined identifier '__builtin_loongarch_csrrd_w'
arch/loongarch/include/asm/fpu.h:72:17: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/fpu.h:72:17: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/fpu.h:81:17: sparse: sparse: undefined identifier '__builtin_loongarch_csrrd_w'
arch/loongarch/include/asm/fpu.h:81:17: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/fpu.h:72:17: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/fpu.h:81:17: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/fpu.h:72:17: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/fpu.h:72:17: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/fpu.h:81:17: sparse: sparse: cast from unknown type
arch/loongarch/kernel/signal.c: note: in included file (through arch/loongarch/include/asm/cpu-info.h, arch/loongarch/include/asm/processor.h, ...):
arch/loongarch/include/asm/loongarch.h:1281:1: sparse: sparse: undefined identifier '__builtin_loongarch_csrrd_w'
arch/loongarch/include/asm/loongarch.h:1281:1: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/loongarch.h:1281:1: sparse: sparse: undefined identifier '__builtin_loongarch_csrwr_w'
arch/loongarch/include/asm/loongarch.h:1281:1: sparse: sparse: cast from unknown type
arch/loongarch/kernel/signal.c: note: in included file:
arch/loongarch/include/asm/fpu.h:81:17: sparse: sparse: cast from unknown type
arch/loongarch/kernel/signal.c: note: in included file (through arch/loongarch/include/asm/cpu-info.h, arch/loongarch/include/asm/processor.h, ...):
arch/loongarch/include/asm/loongarch.h:1281:1: sparse: sparse: cast from unknown type
arch/loongarch/include/asm/loongarch.h:1281:1: sparse: sparse: cast from unknown type

vim +370 arch/loongarch/kernel/signal.c

365
366 static int protected_save_lsx_context(struct extctx_layout *extctx)
367 {
368 int err = 0;
369 struct sctx_info __user *info = extctx->lsx.addr;
> 370 struct lsx_context __user *lsx_ctx = (struct lsx_context *)get_ctx_through_ctxinfo(info);
371 uint64_t __user *regs = (uint64_t *)&lsx_ctx->regs;
372 uint64_t __user *fcc = &lsx_ctx->fcc;
373 uint32_t __user *fcsr = &lsx_ctx->fcsr;
374
375 while (1) {
376 lock_fpu_owner();
377 if (is_lsx_enabled())
378 err = save_hw_lsx_context(lsx_ctx);
379 else {
380 if (is_fpu_owner())
381 save_fp(current);
382 err = copy_lsx_to_sigcontext(lsx_ctx);
383 }
384 unlock_fpu_owner();
385
386 err |= __put_user(LSX_CTX_MAGIC, &info->magic);
387 err |= __put_user(extctx->lsx.size, &info->size);
388
389 if (likely(!err))
390 break;
391 /* Touch the LSX context and try again */
392 err = __put_user(0, &regs[0]) |
393 __put_user(0, &regs[32*2-1]) |
394 __put_user(0, fcc) |
395 __put_user(0, fcsr);
396 if (err)
397 return err; /* really bad sigcontext */
398 }
399
400 return err;
401 }
402
403 static int protected_restore_lsx_context(struct extctx_layout *extctx)
404 {
405 int err = 0, sig = 0, tmp __maybe_unused;
406 struct sctx_info __user *info = extctx->lsx.addr;
407 struct lsx_context __user *lsx_ctx = (struct lsx_context *)get_ctx_through_ctxinfo(info);
408 uint64_t __user *regs = (uint64_t *)&lsx_ctx->regs;
409 uint64_t __user *fcc = &lsx_ctx->fcc;
410 uint32_t __user *fcsr = &lsx_ctx->fcsr;
411
412 err = sig = fcsr_pending(fcsr);
413 if (err < 0)
414 return err;
415
416 while (1) {
417 lock_fpu_owner();
418 if (is_lsx_enabled())
419 err = restore_hw_lsx_context(lsx_ctx);
420 else {
421 err = copy_lsx_from_sigcontext(lsx_ctx);
422 if (is_fpu_owner())
423 restore_fp(current);
424 }
425 unlock_fpu_owner();
426
427 if (likely(!err))
428 break;
429 /* Touch the LSX context and try again */
430 err = __get_user(tmp, &regs[0]) |
431 __get_user(tmp, &regs[32*2-1]) |
432 __get_user(tmp, fcc) |
433 __get_user(tmp, fcsr);
434 if (err)
435 break; /* really bad sigcontext */
436 }
437
438 return err ?: sig;
439 }
440
441 static int protected_save_lasx_context(struct extctx_layout *extctx)
442 {
443 int err = 0;
444 struct sctx_info __user *info = extctx->lasx.addr;
445 struct lasx_context __user *lasx_ctx =
> 446 (struct lasx_context *)get_ctx_through_ctxinfo(info);
447 uint64_t __user *regs = (uint64_t *)&lasx_ctx->regs;
448 uint64_t __user *fcc = &lasx_ctx->fcc;
449 uint32_t __user *fcsr = &lasx_ctx->fcsr;
450
451 while (1) {
452 lock_fpu_owner();
453 if (is_lasx_enabled())
454 err = save_hw_lasx_context(lasx_ctx);
455 else {
456 if (is_lsx_enabled())
457 save_lsx(current);
458 else if (is_fpu_owner())
459 save_fp(current);
460 err = copy_lasx_to_sigcontext(lasx_ctx);
461 }
462 unlock_fpu_owner();
463
464 err |= __put_user(LASX_CTX_MAGIC, &info->magic);
465 err |= __put_user(extctx->lasx.size, &info->size);
466
467 if (likely(!err))
468 break;
469 /* Touch the LASX context and try again */
470 err = __put_user(0, &regs[0]) |
471 __put_user(0, &regs[32*4-1]) |
472 __put_user(0, fcc) |
473 __put_user(0, fcsr);
474 if (err)
475 return err; /* really bad sigcontext */
476 }
477
478 return err;
479 }
480

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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