linux-kernel - Re: [PATCH 6/7] perf: x86/core: Add interface to query perfmon_event

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Date:   Thu, 18 Nov 2021 21:36:39 +0800
From:   Like Xu <like.xu.linux@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kbuild-all@...ts.01.org, Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Like Xu <likexu@...cent.com>,
        Peter Zijlstra <peterz@...radead.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH 6/7] perf: x86/core: Add interface to query
 perfmon_event_map[] directly

On 18/11/2021 4:06 pm, Like Xu wrote:
> On 18/11/2021 7:21 am, kernel test robot wrote:
>> Hi Like,
>>
>> Thank you for the patch! Yet something to improve:
>>
>> [auto build test ERROR on kvm/queue]
>> [also build test ERROR on tip/perf/core mst-vhost/linux-next linus/master 
>> v5.16-rc1 next-20211117]
>> [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]
>>
> 
> ...
> 
>> vim +500 arch/x86/include/asm/perf_event.h
>>
>>     492
>>     493    #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
>>     494    extern struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
>>     495    extern u64 perf_get_hw_event_config(int perf_hw_id);
>>     496    extern int x86_perf_get_lbr(struct x86_pmu_lbr *lbr);
>>     497    #else
>>     498    struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
>>     499    u64 perf_get_hw_event_config(int perf_hw_id);
> 
> Thanks to the robot, I should have removed the ";" from this line.
> 

Sorry, my bot is shouting at me again. This part should be:

diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 8fc1b5003713..85fd768d49d7 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -492,9 +492,11 @@ static inline void perf_check_microcode(void) { }

  #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
  extern struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
+extern u64 perf_get_hw_event_config(int perf_hw_id);
  extern int x86_perf_get_lbr(struct x86_pmu_lbr *lbr);
  #else
  struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
+static u64 perf_get_hw_event_config(int perf_hw_id);
  static inline int x86_perf_get_lbr(struct x86_pmu_lbr *lbr)
  {
         return -1;

> Awaiting further review comments.
> 
>>   > 500    {
>>     501        return 0;
>>     502    }
>>     503    static inline int x86_perf_get_lbr(struct x86_pmu_lbr *lbr)
>>     504    {
>>     505        return -1;
>>     506    }
>>     507    #endif
>>     508
>>
>> ---
>> 0-DAY CI Kernel Test Service, Intel Corporation
>> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>>