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Date: Wed, 19 Oct 2022 14:11:27 -0500
From: Rob Herring <robh@...nel.org>
To: Namhyung Kim <namhyung@...nel.org>,
James Morse <james.morse@....com>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Marc Zyngier <maz@...nel.org>,
Suzuki K Poulose <suzuki.poulose@....com>,
Will Deacon <will@...nel.org>,
Alexandru Elisei <alexandru.elisei@....com>,
Catalin Marinas <catalin.marinas@....com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Oliver Upton <oliver.upton@...ux.dev>,
Jiri Olsa <jolsa@...nel.org>
Cc: kvmarm@...ts.cs.columbia.edu, kvmarm@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
Mark Brown <broonie@...nel.org>
Subject: [PATCH v2 4/7] perf: arm_spe: Drop BIT() and use FIELD_GET/PREP accessors
Now that generated sysregs are in place, update the register field
accesses. The use of BIT() is no longer needed with the new defines. Use
FIELD_GET and FIELD_PREP instead of open coding masking and shifting.
No functional change.
Signed-off-by: Rob Herring <robh@...nel.org>
---
drivers/perf/arm_spe_pmu.c | 70 ++++++++++++++++++++++------------------------
1 file changed, 34 insertions(+), 36 deletions(-)
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 814ed18346b6..9b4bd72087ea 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -283,18 +283,18 @@ static u64 arm_spe_event_to_pmscr(struct perf_event *event)
struct perf_event_attr *attr = &event->attr;
u64 reg = 0;
- reg |= ATTR_CFG_GET_FLD(attr, ts_enable) << PMSCR_EL1_TS_SHIFT;
- reg |= ATTR_CFG_GET_FLD(attr, pa_enable) << PMSCR_EL1_PA_SHIFT;
- reg |= ATTR_CFG_GET_FLD(attr, pct_enable) << PMSCR_EL1_PCT_SHIFT;
+ reg |= FIELD_PREP(PMSCR_EL1_TS, ATTR_CFG_GET_FLD(attr, ts_enable));
+ reg |= FIELD_PREP(PMSCR_EL1_PA, ATTR_CFG_GET_FLD(attr, pa_enable));
+ reg |= FIELD_PREP(PMSCR_EL1_PCT, ATTR_CFG_GET_FLD(attr, pct_enable));
if (!attr->exclude_user)
- reg |= BIT(PMSCR_EL1_E0SPE_SHIFT);
+ reg |= PMSCR_EL1_E0SPE;
if (!attr->exclude_kernel)
- reg |= BIT(PMSCR_EL1_E1SPE_SHIFT);
+ reg |= PMSCR_EL1_E1SPE;
if (get_spe_event_has_cx(event))
- reg |= BIT(PMSCR_EL1_CX_SHIFT);
+ reg |= PMSCR_EL1_CX;
return reg;
}
@@ -322,7 +322,7 @@ static u64 arm_spe_event_to_pmsirr(struct perf_event *event)
arm_spe_event_sanitise_period(event);
- reg |= ATTR_CFG_GET_FLD(attr, jitter) << PMSIRR_EL1_RND_SHIFT;
+ reg |= FIELD_PREP(PMSIRR_EL1_RND, ATTR_CFG_GET_FLD(attr, jitter));
reg |= event->hw.sample_period;
return reg;
@@ -333,18 +333,18 @@ static u64 arm_spe_event_to_pmsfcr(struct perf_event *event)
struct perf_event_attr *attr = &event->attr;
u64 reg = 0;
- reg |= ATTR_CFG_GET_FLD(attr, load_filter) << PMSFCR_EL1_LD_SHIFT;
- reg |= ATTR_CFG_GET_FLD(attr, store_filter) << PMSFCR_EL1_ST_SHIFT;
- reg |= ATTR_CFG_GET_FLD(attr, branch_filter) << PMSFCR_EL1_B_SHIFT;
+ reg |= FIELD_PREP(PMSFCR_EL1_LD, ATTR_CFG_GET_FLD(attr, load_filter));
+ reg |= FIELD_PREP(PMSFCR_EL1_ST, ATTR_CFG_GET_FLD(attr, store_filter));
+ reg |= FIELD_PREP(PMSFCR_EL1_B, ATTR_CFG_GET_FLD(attr, branch_filter));
if (reg)
- reg |= BIT(PMSFCR_EL1_FT_SHIFT);
+ reg |= PMSFCR_EL1_FT;
if (ATTR_CFG_GET_FLD(attr, event_filter))
- reg |= BIT(PMSFCR_EL1_FE_SHIFT);
+ reg |= PMSFCR_EL1_FE;
if (ATTR_CFG_GET_FLD(attr, min_latency))
- reg |= BIT(PMSFCR_EL1_FL_SHIFT);
+ reg |= PMSFCR_EL1_FL;
return reg;
}
@@ -358,8 +358,7 @@ static u64 arm_spe_event_to_pmsevfr(struct perf_event *event)
static u64 arm_spe_event_to_pmslatfr(struct perf_event *event)
{
struct perf_event_attr *attr = &event->attr;
- return ATTR_CFG_GET_FLD(attr, min_latency)
- << PMSLATFR_EL1_MINLAT_SHIFT;
+ return FIELD_PREP(PMSLATFR_EL1_MINLAT, ATTR_CFG_GET_FLD(attr, min_latency));
}
static void arm_spe_pmu_pad_buf(struct perf_output_handle *handle, int len)
@@ -511,7 +510,7 @@ static void arm_spe_perf_aux_output_begin(struct perf_output_handle *handle,
limit = buf->snapshot ? arm_spe_pmu_next_snapshot_off(handle)
: arm_spe_pmu_next_off(handle);
if (limit)
- limit |= BIT(PMBLIMITR_EL1_E_SHIFT);
+ limit |= PMBLIMITR_EL1_E;
limit += (u64)buf->base;
base = (u64)buf->base + PERF_IDX2OFF(handle->head, buf);
@@ -570,23 +569,23 @@ arm_spe_pmu_buf_get_fault_act(struct perf_output_handle *handle)
/* Service required? */
pmbsr = read_sysreg_s(SYS_PMBSR_EL1);
- if (!(pmbsr & BIT(PMBSR_EL1_S_SHIFT)))
+ if (!FIELD_GET(PMBSR_EL1_S, pmbsr))
return SPE_PMU_BUF_FAULT_ACT_SPURIOUS;
/*
* If we've lost data, disable profiling and also set the PARTIAL
* flag to indicate that the last record is corrupted.
*/
- if (pmbsr & BIT(PMBSR_EL1_DL_SHIFT))
+ if (FIELD_GET(PMBSR_EL1_DL, pmbsr))
perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED |
PERF_AUX_FLAG_PARTIAL);
/* Report collisions to userspace so that it can up the period */
- if (pmbsr & BIT(PMBSR_EL1_COLL_SHIFT))
+ if (FIELD_GET(PMBSR_EL1_COLL, pmbsr))
perf_aux_output_flag(handle, PERF_AUX_FLAG_COLLISION);
/* We only expect buffer management events */
- switch (FIELD_GET(PMBSR_EL1_EC_MASK, pmbsr)) {
+ switch (FIELD_GET(PMBSR_EL1_EC, pmbsr)) {
case PMBSR_EL1_EC_BUF:
/* Handled below */
break;
@@ -716,23 +715,22 @@ static int arm_spe_pmu_event_init(struct perf_event *event)
return -EINVAL;
reg = arm_spe_event_to_pmsfcr(event);
- if ((reg & BIT(PMSFCR_EL1_FE_SHIFT)) &&
+ if ((FIELD_GET(PMSFCR_EL1_FE, reg)) &&
!(spe_pmu->features & SPE_PMU_FEAT_FILT_EVT))
return -EOPNOTSUPP;
- if ((reg & BIT(PMSFCR_EL1_FT_SHIFT)) &&
+ if ((FIELD_GET(PMSFCR_EL1_FT, reg)) &&
!(spe_pmu->features & SPE_PMU_FEAT_FILT_TYP))
return -EOPNOTSUPP;
- if ((reg & BIT(PMSFCR_EL1_FL_SHIFT)) &&
+ if ((FIELD_GET(PMSFCR_EL1_FL, reg)) &&
!(spe_pmu->features & SPE_PMU_FEAT_FILT_LAT))
return -EOPNOTSUPP;
set_spe_event_has_cx(event);
reg = arm_spe_event_to_pmscr(event);
if (!perfmon_capable() &&
- (reg & (BIT(PMSCR_EL1_PA_SHIFT) |
- BIT(PMSCR_EL1_PCT_SHIFT))))
+ (reg & (PMSCR_EL1_PA | PMSCR_EL1_PCT)))
return -EACCES;
return 0;
@@ -970,14 +968,14 @@ static void __arm_spe_pmu_dev_probe(void *info)
/* Read PMBIDR first to determine whether or not we have access */
reg = read_sysreg_s(SYS_PMBIDR_EL1);
- if (reg & BIT(PMBIDR_EL1_P_SHIFT)) {
+ if (FIELD_GET(PMBIDR_EL1_P, reg)) {
dev_err(dev,
"profiling buffer owned by higher exception level\n");
return;
}
/* Minimum alignment. If it's out-of-range, then fail the probe */
- fld = (reg & PMBIDR_EL1_ALIGN_MASK) >> PMBIDR_EL1_ALIGN_SHIFT;
+ fld = FIELD_GET(PMBIDR_EL1_ALIGN, reg);
spe_pmu->align = 1 << fld;
if (spe_pmu->align > SZ_2K) {
dev_err(dev, "unsupported PMBIDR.Align [%d] on CPU %d\n",
@@ -987,26 +985,26 @@ static void __arm_spe_pmu_dev_probe(void *info)
/* It's now safe to read PMSIDR and figure out what we've got */
reg = read_sysreg_s(SYS_PMSIDR_EL1);
- if (reg & BIT(PMSIDR_EL1_FE_SHIFT))
+ if (FIELD_GET(PMSIDR_EL1_FE, reg))
spe_pmu->features |= SPE_PMU_FEAT_FILT_EVT;
- if (reg & BIT(PMSIDR_EL1_FT_SHIFT))
+ if (FIELD_GET(PMSIDR_EL1_FT, reg))
spe_pmu->features |= SPE_PMU_FEAT_FILT_TYP;
- if (reg & BIT(PMSIDR_EL1_FL_SHIFT))
+ if (FIELD_GET(PMSIDR_EL1_FL, reg))
spe_pmu->features |= SPE_PMU_FEAT_FILT_LAT;
- if (reg & BIT(PMSIDR_EL1_ARCHINST_SHIFT))
+ if (FIELD_GET(PMSIDR_EL1_ARCHINST, reg))
spe_pmu->features |= SPE_PMU_FEAT_ARCH_INST;
- if (reg & BIT(PMSIDR_EL1_LDS_SHIFT))
+ if (FIELD_GET(PMSIDR_EL1_LDS, reg))
spe_pmu->features |= SPE_PMU_FEAT_LDS;
- if (reg & BIT(PMSIDR_EL1_ERND_SHIFT))
+ if (FIELD_GET(PMSIDR_EL1_ERND, reg))
spe_pmu->features |= SPE_PMU_FEAT_ERND;
/* This field has a spaced out encoding, so just use a look-up */
- fld = (reg & PMSIDR_EL1_INTERVAL_MASK) >> PMSIDR_EL1_INTERVAL_SHIFT;
+ fld = FIELD_GET(PMSIDR_EL1_INTERVAL, reg);
switch (fld) {
case 0:
spe_pmu->min_period = 256;
@@ -1038,7 +1036,7 @@ static void __arm_spe_pmu_dev_probe(void *info)
}
/* Maximum record size. If it's out-of-range, then fail the probe */
- fld = (reg & PMSIDR_EL1_MAXSIZE_MASK) >> PMSIDR_EL1_MAXSIZE_SHIFT;
+ fld = FIELD_GET(PMSIDR_EL1_MAXSIZE, reg);
spe_pmu->max_record_sz = 1 << fld;
if (spe_pmu->max_record_sz > SZ_2K || spe_pmu->max_record_sz < 16) {
dev_err(dev, "unsupported PMSIDR_EL1.MaxSize [%d] on CPU %d\n",
@@ -1046,7 +1044,7 @@ static void __arm_spe_pmu_dev_probe(void *info)
return;
}
- fld = (reg & PMSIDR_EL1_COUNTSIZE_MASK) >> PMSIDR_EL1_COUNTSIZE_SHIFT;
+ fld = FIELD_GET(PMSIDR_EL1_COUNTSIZE, reg);
switch (fld) {
default:
dev_warn(dev, "unknown PMSIDR_EL1.CountSize [%d]; assuming 2\n",
--
b4 0.11.0-dev
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