On Mon, Nov 7, 2022 at 1:48 PM Namhyung Kim <namhyung@xxxxxxxxxx> wrote: > > Hello, > > On Fri, Nov 4, 2022 at 8:55 AM Rob Herring <robh@xxxxxxxxxx> wrote: > > > > Arm SPEv1.2 (Arm v8.7/v9.2) adds a new feature called Inverted Event > > Filter which excludes samples matching the event filter. The feature > > mirrors the existing event filter in PMSEVFR_EL1 adding a new register, > > PMSNEVFR_EL1, which has the same event bit assignments. > > Just out of curiosity, is it possible to have the event filter and > inverted filter at the same time? Yes, that's why config3 is needed. Samples with all the events set in PMSEVFR_EL1 and none of the events set in PMSNEVFR_EL1 are recorded. For example if an event bit is 0 in PMSEVFR_EL1, then recorded samples may or may not have that event. If the same event bit is then set in PMSNEVFR_EL1, then record samples will not have that event. > What if they have the same? You'd get no samples. Rob _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
