* [xinli-intel-fred-public:intel-lkp 28/33] arch/x86/kernel/cpu/resctrl/pseudo_lock.c:484:14: error: call to undeclared function 'native_rdmsrq_no_trace'; ISO C99 and later do not support implicit function declarations
@ 2025-04-20 7:32 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-04-20 7:32 UTC (permalink / raw)
To: Xin3 Li; +Cc: oe-kbuild-all
Hi Xin,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://github.com/xinli-intel/linux-fred-public.git intel-lkp
head: 7847889af95a1a39c6e3e0ef6479df8b9505a17d
commit: 58bf67d4ea90dad258ed448cd35ac9c28890719b [28/33] x86/msr: Rename native_rdmsrq() to native_rdmsrq_no_trace()
config: i386-buildonly-randconfig-002-20250420 (https://download.01.org/0day-ci/archive/20250420/202504201524.Al7l03SP-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250420/202504201524.Al7l03SP-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/202504201524.Al7l03SP-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/x86/kernel/cpu/resctrl/pseudo_lock.c:19:
In file included from include/linux/perf_event.h:25:
In file included from arch/x86/include/asm/perf_event.h:604:
In file included from arch/x86/include/asm/stacktrace.h:14:
arch/x86/include/asm/switch_to.h:62:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
62 | wrmsrq(MSR_IA32_SYSENTER_CS, thread->sysenter_cs);
| ^
In file included from arch/x86/kernel/cpu/resctrl/pseudo_lock.c:26:
arch/x86/include/asm/resctrl.h:140:3: error: call to undeclared function 'wrmsr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
140 | wrmsr(MSR_IA32_PQR_ASSOC, rmid, closid);
| ^
In file included from arch/x86/kernel/cpu/resctrl/pseudo_lock.c:29:
arch/x86/include/uapi/../../events/perf_event.h:1238:3: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1238 | wrmsrq(hwc->extra_reg.reg, hwc->extra_reg.config);
| ^
arch/x86/include/uapi/../../events/perf_event.h:1263:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1263 | wrmsrq(hwc->config_base, hwc->config & ~disable_mask);
| ^
arch/x86/include/uapi/../../events/perf_event.h:1434:2: error: call to undeclared function 'rdmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1434 | rdmsrq(MSR_AMD_DBG_EXTN_CFG, dbg_extn_cfg);
| ^
arch/x86/include/uapi/../../events/perf_event.h:1435:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1435 | wrmsrq(MSR_AMD_DBG_EXTN_CFG, dbg_extn_cfg & ~DBG_EXTN_CFG_LBRV2EN);
| ^
arch/x86/include/uapi/../../events/perf_event.h:1571:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1571 | wrmsrq(MSR_IA32_PEBS_ENABLE, 0);
| ^
arch/x86/include/uapi/../../events/perf_event.h:1576:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1576 | wrmsrq(MSR_ARCH_LBR_CTL, 0);
| ^
arch/x86/include/uapi/../../events/perf_event.h:1583:2: error: call to undeclared function 'rdmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1583 | rdmsrq(MSR_IA32_DEBUGCTLMSR, debugctl);
| ^
arch/x86/include/uapi/../../events/perf_event.h:1585:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1585 | wrmsrq(MSR_IA32_DEBUGCTLMSR, debugctl);
| ^
>> arch/x86/kernel/cpu/resctrl/pseudo_lock.c:484:14: error: call to undeclared function 'native_rdmsrq_no_trace'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
484 | saved_msr = native_rdmsrq_no_trace(MSR_MISC_FEATURE_CONTROL);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:485:2: error: call to undeclared function 'native_wrmsrq_no_trace'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
485 | native_wrmsrq_no_trace(MSR_MISC_FEATURE_CONTROL, prefetch_disable_bits);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:497:2: error: call to undeclared function 'native_wrmsr_no_trace'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
497 | native_wrmsr_no_trace(MSR_IA32_PQR_ASSOC, rmid_p, plr->closid);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:537:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
537 | wrmsrq(MSR_MISC_FEATURE_CONTROL, saved_msr);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:906:2: error: call to undeclared function 'rdmsr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
906 | rdmsr(MSR_MISC_FEATURE_CONTROL, saved_low, saved_high);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:907:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
907 | wrmsrq(MSR_MISC_FEATURE_CONTROL, prefetch_disable_bits);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:923:2: error: call to undeclared function 'wrmsr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
923 | wrmsr(MSR_MISC_FEATURE_CONTROL, saved_low, saved_high);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:1002:2: error: call to undeclared function 'rdmsr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1002 | rdmsr(MSR_MISC_FEATURE_CONTROL, saved_low, saved_high);
| ^
arch/x86/kernel/cpu/resctrl/pseudo_lock.c:1003:2: error: call to undeclared function 'wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1003 | wrmsrq(MSR_MISC_FEATURE_CONTROL, prefetch_disable_bits);
| ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
vim +/native_rdmsrq_no_trace +484 arch/x86/kernel/cpu/resctrl/pseudo_lock.c
458
459 /*
460 * Make sure none of the allocated memory is cached. If it is we
461 * will get a cache hit in below loop from outside of pseudo-locked
462 * region.
463 * wbinvd (as opposed to clflush/clflushopt) is required to
464 * increase likelihood that allocated cache portion will be filled
465 * with associated memory.
466 */
467 wbinvd();
468
469 /*
470 * Always called with interrupts enabled. By disabling interrupts
471 * ensure that we will not be preempted during this critical section.
472 */
473 local_irq_disable();
474
475 /*
476 * Call wrmsr and rdmsr as directly as possible to avoid tracing
477 * clobbering local register variables or affecting cache accesses.
478 *
479 * Disable the hardware prefetcher so that when the end of the memory
480 * being pseudo-locked is reached the hardware will not read beyond
481 * the buffer and evict pseudo-locked memory read earlier from the
482 * cache.
483 */
> 484 saved_msr = native_rdmsrq_no_trace(MSR_MISC_FEATURE_CONTROL);
485 native_wrmsrq_no_trace(MSR_MISC_FEATURE_CONTROL, prefetch_disable_bits);
486 closid_p = this_cpu_read(pqr_state.cur_closid);
487 rmid_p = this_cpu_read(pqr_state.cur_rmid);
488 mem_r = plr->kmem;
489 size = plr->size;
490 line_size = plr->line_size;
491 /*
492 * Critical section begin: start by writing the closid associated
493 * with the capacity bitmask of the cache region being
494 * pseudo-locked followed by reading of kernel memory to load it
495 * into the cache.
496 */
497 native_wrmsr_no_trace(MSR_IA32_PQR_ASSOC, rmid_p, plr->closid);
498
499 /*
500 * Cache was flushed earlier. Now access kernel memory to read it
501 * into cache region associated with just activated plr->closid.
502 * Loop over data twice:
503 * - In first loop the cache region is shared with the page walker
504 * as it populates the paging structure caches (including TLB).
505 * - In the second loop the paging structure caches are used and
506 * cache region is populated with the memory being referenced.
507 */
508 for (i = 0; i < size; i += PAGE_SIZE) {
509 /*
510 * Add a barrier to prevent speculative execution of this
511 * loop reading beyond the end of the buffer.
512 */
513 rmb();
514 asm volatile("mov (%0,%1,1), %%eax\n\t"
515 :
516 : "r" (mem_r), "r" (i)
517 : "%eax", "memory");
518 }
519 for (i = 0; i < size; i += line_size) {
520 /*
521 * Add a barrier to prevent speculative execution of this
522 * loop reading beyond the end of the buffer.
523 */
524 rmb();
525 asm volatile("mov (%0,%1,1), %%eax\n\t"
526 :
527 : "r" (mem_r), "r" (i)
528 : "%eax", "memory");
529 }
530 /*
531 * Critical section end: restore closid with capacity bitmask that
532 * does not overlap with pseudo-locked region.
533 */
534 native_wrmsr_no_trace(MSR_IA32_PQR_ASSOC, rmid_p, closid_p);
535
536 /* Re-enable the hardware prefetcher(s) */
537 wrmsrq(MSR_MISC_FEATURE_CONTROL, saved_msr);
538 local_irq_enable();
539
540 plr->thread_done = 1;
541 wake_up_interruptible(&plr->lock_thread_wq);
542 return 0;
543 }
544
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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