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perf/arm-cmn: Enable support for tertiary match group

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Add support for tertiary match group.

Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20240618005056.3092866-3-ilkka@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Ilkka Koskinen 2024-06-17 17:50:56 -07:00 • committed by Will Deacon
parent 4a112585eb
commit f9a7a91f64
1 changed files with 13 additions and 6 deletions
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19
drivers/perf/arm-cmn.c
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@ -174,9 +174,8 @@
#define CMN_CONFIG_WP_COMBINE GENMASK_ULL(30, 27)
#define CMN_CONFIG_WP_DEV_SEL GENMASK_ULL(50, 48)
#define CMN_CONFIG_WP_CHN_SEL GENMASK_ULL(55, 51)
/* Note that we don't yet support the tertiary match group on newer IPs */
#define CMN_CONFIG_WP_GRP BIT_ULL(56)
#define CMN_CONFIG_WP_EXCLUSIVE BIT_ULL(57)
#define CMN_CONFIG_WP_GRP GENMASK_ULL(57, 56)
#define CMN_CONFIG_WP_EXCLUSIVE BIT_ULL(58)
#define CMN_CONFIG1_WP_VAL GENMASK_ULL(63, 0)
#define CMN_CONFIG2_WP_MASK GENMASK_ULL(63, 0)
@ -1384,7 +1383,7 @@ static void arm_cmn_claim_wp_idx(struct arm_cmn_dtm *dtm,
arm_cmn_set_wp_idx(hw->wp_idx, pos, wp_idx - CMN_EVENT_EVENTID(event));
}
static u32 arm_cmn_wp_config(struct perf_event *event)
static u32 arm_cmn_wp_config(struct perf_event *event, int wp_idx)
{
u32 config;
u32 dev = CMN_EVENT_WP_DEV_SEL(event);
@ -1394,6 +1393,10 @@ static u32 arm_cmn_wp_config(struct perf_event *event)
u32 combine = CMN_EVENT_WP_COMBINE(event);
bool is_cmn600 = to_cmn(event->pmu)->part == PART_CMN600;
/* CMN-600 supports only primary and secondary matching groups */
if (is_cmn600)
grp &= 1;
config = FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_DEV_SEL, dev) |
FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_CHN_SEL, chn) |
FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_GRP, grp) |
@ -1401,7 +1404,9 @@ static u32 arm_cmn_wp_config(struct perf_event *event)
if (exc)
config |= is_cmn600 ? CMN600_WPn_CONFIG_WP_EXCLUSIVE :
CMN_DTM_WPn_CONFIG_WP_EXCLUSIVE;
if (combine && !grp)
/* wp_combine is available only on WP0 and WP2 */
if (combine && !(wp_idx & 0x1))
config |= is_cmn600 ? CMN600_WPn_CONFIG_WP_COMBINE :
CMN_DTM_WPn_CONFIG_WP_COMBINE;
return config;
@ -1898,12 +1903,14 @@ static int arm_cmn_event_add(struct perf_event *event, int flags)
input_sel = CMN__PMEVCNT0_INPUT_SEL_XP + dtm_idx;
} else if (type == CMN_TYPE_WP) {
int tmp, wp_idx;
u32 cfg = arm_cmn_wp_config(event);
u32 cfg;
wp_idx = arm_cmn_find_free_wp_idx(dtm, event);
if (wp_idx < 0)
goto free_dtms;
cfg = arm_cmn_wp_config(event, wp_idx);
tmp = dtm->wp_event[wp_idx ^ 1];
if (tmp >= 0 && CMN_EVENT_WP_COMBINE(event) !=
CMN_EVENT_WP_COMBINE(cmn->dtc[d].counters[tmp]))