• Cody P Schafer's avatar
    powerpc/perf/hv-24x7: parse catalog and populate sysfs with events · 5c5cd7b5
    Cody P Schafer authored
    Retrieves and parses the 24x7 catalog on POWER systems that supply it
    (right now, only POWER 8). Events are exposed via sysfs in the standard
    fashion, and are all parameterized.
    
    	$ cd /sys/bus/event_source/devices/hv_24x7/events
    
    	$ cat HPM_CS_FROM_L4_LDATA__PHYS_CORE
    	domain=0x2,offset=0xd58,core=?,lpar=0x0
    
    	$ cat HPM_TLBIE__VCPU_HOME_CHIP
    	domain=0x4,offset=0x358,vcpu=?,lpar=?
    
    where user is required to specify values for the fields with '?' (like
    core, vcpu, lpar above), when specifying the event with the perf tool.
    
    Catalog is (at the moment) only parsed on boot. It needs re-parsing
    when a some hypervisor events occur. At that point we'll also need to
    prevent old events from continuing to function (counter that is passed
    in via spare space in the config values?).
    Signed-off-by: default avatarCody P Schafer <cody@linux.vnet.ibm.com>
    Signed-off-by: default avatarSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    5c5cd7b5
hv-24x7.h 2.63 KB