* [broonie-ci:kvm-arm64-sme 4/30] arch/arm64/kernel/fpsimd.c:518:5: warning: format specifies type 'unsigned long long' but the argument has type 'int'
@ 2026-07-07 21:36 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-07-07 21:36 UTC (permalink / raw)
To: Mark Brown; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/ci.git kvm-arm64-sme
head: 489202b3db0a02f59477f8ec63009dc3d998341f
commit: b77633efe7c6ef49465e89432b3fd7d1541d3b3a [4/30] arm64/fpsimd: Decide to save ZT0 and streaming mode FFR at bind time
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20260708/202607080542.LD9Mh3ue-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 0a2fb2a2269da0e2a3e230beb6cad39ca314db33)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260708/202607080542.LD9Mh3ue-lkp@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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202607080542.LD9Mh3ue-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> arch/arm64/kernel/fpsimd.c:518:5: warning: format specifies type 'unsigned long long' but the argument has type 'int' [-Wformat]
517 | pr_crit("%llu %llu\n",
| ~~~~
| %d
518 | sve_get_vl() != sve_vl_from_vq(vq));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/printk.h:544:34: note: expanded from macro 'pr_crit'
544 | printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:511:60: note: expanded from macro 'printk'
511 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:483:19: note: expanded from macro 'printk_index_wrap'
483 | _p_func(_fmt, ##__VA_ARGS__); \
| ~~~~ ^~~~~~~~~~~
>> arch/arm64/kernel/fpsimd.c:517:21: warning: more '%' conversions than data arguments [-Wformat-insufficient-args]
517 | pr_crit("%llu %llu\n",
| ~~~^
include/linux/printk.h:544:26: note: expanded from macro 'pr_crit'
544 | printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
| ^~~
include/linux/printk.h:401:21: note: expanded from macro 'pr_fmt'
401 | #define pr_fmt(fmt) fmt
| ^~~
include/linux/printk.h:511:53: note: expanded from macro 'printk'
511 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^~~
include/linux/printk.h:483:11: note: expanded from macro 'printk_index_wrap'
483 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~
2 warnings generated.
vim +518 arch/arm64/kernel/fpsimd.c
452
453 /*
454 * Ensure FPSIMD/SVE storage in memory for the loaded context is up to
455 * date with respect to the CPU registers. Note carefully that the
456 * current context is the context last bound to the CPU stored in
457 * last, if KVM is involved this may be the guest VM context rather
458 * than the host thread for the VM pointed to by current. This means
459 * that we must always reference the state storage via last rather
460 * than via current, if we are saving KVM state then it will have
461 * ensured that the type of registers to save is set in last->to_save.
462 */
463 static void fpsimd_save_user_state(void)
464 {
465 struct cpu_fp_state const *last =
466 this_cpu_ptr(&fpsimd_last_state);
467 /* set by fpsimd_bind_task_to_cpu() or fpsimd_bind_state_to_cpu() */
468 bool save_sve_regs = false;
469 bool save_ffr;
470 unsigned int vq;
471
472 WARN_ON(!system_supports_fpsimd());
473 WARN_ON(preemptible());
474
475 if (test_thread_flag(TIF_FOREIGN_FPSTATE))
476 return;
477
478 if (system_supports_fpmr())
479 *(last->fpmr) = read_sysreg_s(SYS_FPMR);
480
481 /*
482 * Save SVE state if it is live.
483 *
484 * The syscall ABI discards live SVE state at syscall entry. When
485 * entering a syscall, fpsimd_syscall_enter() sets to_save to
486 * FP_STATE_FPSIMD to allow the SVE state to be lazily discarded until
487 * either new SVE state is loaded+bound or fpsimd_syscall_exit() is
488 * called prior to a return to userspace.
489 */
490 if ((last->to_save == FP_STATE_CURRENT && test_thread_flag(TIF_SVE)) ||
491 last->to_save == FP_STATE_SVE) {
492 save_sve_regs = true;
493 save_ffr = true;
494 vq = SYS_FIELD_GET(ZCR_ELx, LEN, last->zcr) + 1;
495 }
496
497 if (system_supports_sme()) {
498 u64 *svcr = last->svcr;
499
500 *svcr = read_sysreg_s(SYS_SVCR);
501
502 if (*svcr & SVCR_ZA_MASK)
503 sme_save_state(last->sme_state,
504 last->smcr & SMCR_ELx_EZT0);
505
506 /* If we are in streaming mode override regular SVE. */
507 if (*svcr & SVCR_SM_MASK) {
508 save_sve_regs = true;
509 save_ffr = last->smcr & SMCR_ELx_FA64;
510 vq = SYS_FIELD_GET(SMCR_ELx, LEN, last->smcr) + 1;
511 }
512 }
513
514 if (IS_ENABLED(CONFIG_ARM64_SVE) && save_sve_regs) {
515 /* Get the configured VL from RDVL, will account for SM */
516 if (WARN_ON(sve_get_vl() != sve_vl_from_vq(vq))) {
> 517 pr_crit("%llu %llu\n",
> 518 sve_get_vl() != sve_vl_from_vq(vq));
519 /*
520 * Can't save the user regs, so current would
521 * re-enter user with corrupt state.
522 * There's no way to recover, so kill it:
523 */
524 force_signal_inject(SIGKILL, SI_KERNEL, 0, 0);
525 return;
526 }
527
528 sve_save_state(last->sve_state, save_ffr);
529 fpsimd_save_common(last->st);
530 *last->fp_type = FP_STATE_SVE;
531 } else {
532 fpsimd_save_state(last->st);
533 *last->fp_type = FP_STATE_FPSIMD;
534 }
535 }
536
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-07-07 21:36 [broonie-ci:kvm-arm64-sme 4/30] arch/arm64/kernel/fpsimd.c:518:5: warning: format specifies type 'unsigned long long' but the argument has type 'int' kernel test robot
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