[acrn:6.17/linux 51/3102] arch/x86/events/intel/ds.c:2881:24: warning: cast from pointer to integer of different size

[kernel test robot <lkp@intel.com>]

Hi Dapeng,

FYI, the error/warning still remains.

tree:   https://github.com/projectacrn/acrn-kernel 6.17/linux
head:   eac6d3b7a20ffb9d3102dbdc152241a7184a63cd
commit: 67977912bebfec14bf4c0ced6c01df309725fc8d [51/3102] perf/x86/intel: Process arch-PEBS records or record fragments
config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20260227/202602271552.8NPMraId-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260227/202602271552.8NPMraId-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/202602271552.8NPMraId-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/x86/events/intel/ds.c: In function 'intel_pmu_drain_arch_pebs':
>> arch/x86/events/intel/ds.c:2881:24: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    2881 |         top = (void *)((u64)cpuc->ds_pebs_vaddr +
         |                        ^
>> arch/x86/events/intel/ds.c:2881:15: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
    2881 |         top = (void *)((u64)cpuc->ds_pebs_vaddr +
         |               ^


vim +2881 arch/x86/events/intel/ds.c

  2860	
  2861	static void intel_pmu_drain_arch_pebs(struct pt_regs *iregs,
  2862					      struct perf_sample_data *data)
  2863	{
  2864		short counts[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS] = {};
  2865		void *last[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS];
  2866		struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
  2867		union arch_pebs_index index;
  2868		struct x86_perf_regs perf_regs;
  2869		struct pt_regs *regs = &perf_regs.regs;
  2870		void *base, *at, *top;
  2871		u64 mask;
  2872	
  2873		rdmsrq(MSR_IA32_PEBS_INDEX, index.full);
  2874	
  2875		if (unlikely(!index.split.wr)) {
  2876			intel_pmu_pebs_event_update_no_drain(cpuc, X86_PMC_IDX_MAX);
  2877			return;
  2878		}
  2879	
  2880		base = cpuc->ds_pebs_vaddr;
> 2881		top = (void *)((u64)cpuc->ds_pebs_vaddr +
  2882			       (index.split.wr << ARCH_PEBS_INDEX_WR_SHIFT));
  2883	
  2884		mask = hybrid(cpuc->pmu, arch_pebs_cap).counters & cpuc->pebs_enabled;
  2885	
  2886		if (!iregs)
  2887			iregs = &dummy_iregs;
  2888	
  2889		/* Process all but the last event for each counter. */
  2890		for (at = base; at < top;) {
  2891			struct arch_pebs_header *header;
  2892			struct arch_pebs_basic *basic;
  2893			u64 pebs_status;
  2894	
  2895			header = at;
  2896	
  2897			if (WARN_ON_ONCE(!header->size))
  2898				break;
  2899	
  2900			/* 1st fragment or single record must have basic group */
  2901			if (!header->basic) {
  2902				at += header->size;
  2903				continue;
  2904			}
  2905	
  2906			basic = at + sizeof(struct arch_pebs_header);
  2907			pebs_status = mask & basic->applicable_counters;
  2908			__intel_pmu_handle_pebs_record(iregs, regs, data, at,
  2909						       pebs_status, counts, last,
  2910						       setup_arch_pebs_sample_data);
  2911	
  2912			/* Skip non-last fragments */
  2913			while (arch_pebs_record_continued(header)) {
  2914				if (!header->size)
  2915					break;
  2916				at += header->size;
  2917				header = at;
  2918			}
  2919	
  2920			/* Skip last fragment or the single record */
  2921			at += header->size;
  2922		}
  2923	
  2924		__intel_pmu_handle_last_pebs_record(iregs, regs, data, mask, counts,
  2925						    last, setup_arch_pebs_sample_data);
  2926	
  2927		index.split.wr = 0;
  2928		index.split.full = 0;
  2929		wrmsrq(MSR_IA32_PEBS_INDEX, index.full);
  2930	}
  2931	

-- 
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