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perf/arm-cmn: Remove spurious event aliases

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As the name suggests, the "partial DAT flit" event is only counted for
the DAT channel, and furthermore is only applicable to device ports, not
mesh links (strictly it's only device ports with CHI-A requesters
connected, but detecting that degree of detail is more bother than it's
worth). Stop generating spurious event aliases for other combinations
which aren't meaningful.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/b01a58e3ff05c322547fbfd015f6dbfedf555ed3.1688746690.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Robin Murphy 2023-07-07 17:38:11 +01:00 • committed by Will Deacon
parent 918dc87b74
commit 00df90934c
1 changed files with 13 additions and 3 deletions
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16
drivers/perf/arm-cmn.c
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@ -791,16 +791,22 @@ static umode_t arm_cmn_event_attr_is_visible(struct kobject *kobj,
_CMN_EVENT_HNF(_model, _name##_read, _event, 5, SEL_CBUSY_SNTHROTTLE_SEL), \
_CMN_EVENT_HNF(_model, _name##_write, _event, 6, SEL_CBUSY_SNTHROTTLE_SEL)
#define _CMN_EVENT_XP(_name, _event) \
#define _CMN_EVENT_XP_MESH(_name, _event) \
__CMN_EVENT_XP(e_##_name, (_event) | (0 << 2)), \
__CMN_EVENT_XP(w_##_name, (_event) | (1 << 2)), \
__CMN_EVENT_XP(n_##_name, (_event) | (2 << 2)), \
__CMN_EVENT_XP(s_##_name, (_event) | (3 << 2)), \
__CMN_EVENT_XP(s_##_name, (_event) | (3 << 2))
#define _CMN_EVENT_XP_PORT(_name, _event) \
__CMN_EVENT_XP(p0_##_name, (_event) | (4 << 2)), \
__CMN_EVENT_XP(p1_##_name, (_event) | (5 << 2)), \
__CMN_EVENT_XP(p2_##_name, (_event) | (6 << 2)), \
__CMN_EVENT_XP(p3_##_name, (_event) | (7 << 2))
#define _CMN_EVENT_XP(_name, _event) \
_CMN_EVENT_XP_MESH(_name, _event), \
_CMN_EVENT_XP_PORT(_name, _event)
/* Good thing there are only 3 fundamental XP events... */
#define CMN_EVENT_XP(_name, _event) \
_CMN_EVENT_XP(req_##_name, (_event) | (0 << 5)), \
@ -813,6 +819,10 @@ static umode_t arm_cmn_event_attr_is_visible(struct kobject *kobj,
_CMN_EVENT_XP(snp2_##_name, (_event) | (7 << 5)), \
_CMN_EVENT_XP(req2_##_name, (_event) | (8 << 5))
#define CMN_EVENT_XP_DAT(_name, _event) \
_CMN_EVENT_XP_PORT(dat_##_name, (_event) | (3 << 5)), \
_CMN_EVENT_XP_PORT(dat2_##_name, (_event) | (6 << 5))
static struct attribute *arm_cmn_event_attrs[] = {
CMN_EVENT_DTC(cycles),
@ -943,7 +953,7 @@ static struct attribute *arm_cmn_event_attrs[] = {
CMN_EVENT_XP(txflit_valid, 0x01),
CMN_EVENT_XP(txflit_stall, 0x02),
CMN_EVENT_XP(partial_dat_flit, 0x03),
CMN_EVENT_XP_DAT(partial_dat_flit, 0x03),
/* We treat watchpoints as a special made-up class of XP events */
CMN_EVENT_ATTR(CMN_ANY, watchpoint_up, CMN_TYPE_WP, CMN_WP_UP),
CMN_EVENT_ATTR(CMN_ANY, watchpoint_down, CMN_TYPE_WP, CMN_WP_DOWN),