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Diffstat (limited to 'Documentation/arm/CCN.txt')
| -rw-r--r-- | Documentation/arm/CCN.txt | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/Documentation/arm/CCN.txt b/Documentation/arm/CCN.txt index ffca443a19b4..15cdb7bc57c3 100644 --- a/Documentation/arm/CCN.txt +++ b/Documentation/arm/CCN.txt @@ -18,13 +18,17 @@ and config2 fields of the perf_event_attr structure. The "events" directory provides configuration templates for all documented events, that can be used with perf tool. For example "xp_valid_flit" is an equivalent of "type=0x8,event=0x4". Other parameters must be -explicitly specified. For events originating from device, "node" -defines its index. All crosspoint events require "xp" (index), -"port" (device port number) and "vc" (virtual channel ID) and -"dir" (direction). Watchpoints (special "event" value 0xfe) also -require comparator values ("cmp_l" and "cmp_h") and "mask", being -index of the comparator mask. +explicitly specified. +For events originating from device, "node" defines its index. + +Crosspoint PMU events require "xp" (index), "bus" (bus number) +and "vc" (virtual channel ID). + +Crosspoint watchpoint-based events (special "event" value 0xfe) +require "xp" and "vc" as as above plus "port" (device port index), +"dir" (transmit/receive direction), comparator values ("cmp_l" +and "cmp_h") and "mask", being index of the comparator mask. Masks are defined separately from the event description (due to limited number of the config values) in the "cmp_mask" directory, with first 8 configurable by user and additional |
