4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Kan Liang <[email protected]> commit bb9fbe1b57503f790dbbf9f06e72cb0fb9e60740 upstream. Event select bit 7 'Use Occupancy' in PCU Box is not available for counter 0 on BDX Add a constraint to fix it. Reported-by: Stephane Eranian <[email protected]> Signed-off-by: Kan Liang <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Stephane Eranian <[email protected]> Cc: [email protected] Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] Cc: "Jin, Yao" <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/x86/events/intel/uncore_snbep.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -3035,11 +3035,19 @@ static struct intel_uncore_type *bdx_msr NULL, }; +/* Bit 7 'Use Occupancy' is not available for counter 0 on BDX */ +static struct event_constraint bdx_uncore_pcu_constraints[] = { + EVENT_CONSTRAINT(0x80, 0xe, 0x80), + EVENT_CONSTRAINT_END +}; + void bdx_uncore_cpu_init(void) { if (bdx_uncore_cbox.num_boxes > boot_cpu_data.x86_max_cores) bdx_uncore_cbox.num_boxes = boot_cpu_data.x86_max_cores; uncore_msr_uncores = bdx_msr_uncores; + + hswep_uncore_pcu.constraints = bdx_uncore_pcu_constraints; } static struct intel_uncore_type bdx_uncore_ha = {
