Messages in this thread | | | Subject | Re: [PATCH 1/3] Fix filter_tid mask for CHA events on Skylake Server | From | "Liang, Kan" <> | Date | Tue, 14 Sep 2021 15:03:33 -0400 |
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On 9/14/2021 2:23 PM, alexander.antonov@linux.intel.com wrote: > From: Alexander Antonov <alexander.antonov@linux.intel.com> > > According Uncore Reference Manual: any of the CHA events may be filtered > by Thread/Core-ID by using tid modifier in CHA Filter 0 Register. > Update skx_cha_hw_config() to follow Uncore Guide. > > Fixes: cd34cd97b7b4 ("perf/x86/intel/uncore: Add Skylake server uncore support") > Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Thanks, Kan > --- > arch/x86/events/intel/uncore_snbep.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c > index 5ddc0f30db6f..9cc65a4194ce 100644 > --- a/arch/x86/events/intel/uncore_snbep.c > +++ b/arch/x86/events/intel/uncore_snbep.c > @@ -3607,7 +3607,9 @@ static int skx_cha_hw_config(struct intel_uncore_box *box, struct perf_event *ev > { > struct hw_perf_event_extra *reg1 = &event->hw.extra_reg; > struct extra_reg *er; > - int idx = 0; > + /* Any of the CHA events may be filtered by Thread/Core-ID.*/ > + int idx = !!(event->hw.config & SNBEP_CBO_PMON_CTL_TID_EN) ? > + SKX_CHA_MSR_PMON_BOX_FILTER_TID : 0; > > for (er = skx_uncore_cha_extra_regs; er->msr; er++) { > if (er->event != (event->hw.config & er->config_mask)) >
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