On Fri, Jul 17, 2020 at 07:05:43AM -0700, [email protected] wrote: > /* > + * There is no event-code assigned to the fixed-mode PMCs. > + * > + * For a fixed-mode PMC, which has an equivalent event on a general-purpose > + * PMC, the event-code of the equivalent event is used for the fixed-mode > PMC, > + * e.g., Instr_Retired.Any and CPU_CLK_Unhalted.Core. > + * > + * For a fixed-mode PMC, which doesn't have an equivalent event, a > + * pseudo-encoding is used, e.g., CPU_CLK_Unhalted.Ref and TOPDOWN.SLOTS. > + * The pseudo event-code for a fixed-mode PMC must be 0x00. > + * The pseudo umask-code is 0x0X. The X indicates the index of the fixed > + * counter.
Isn't it X+1 ? Such that 0x0000 is an invalid event? After all, the pseudo event for Fixed2 is 0x0300. > + * > + * The counts are available in separate MSRs: > */
