[PATCH v8 10/13] coresight: etm3x: change drvdata->spinlock type to raw_spin_lock_t

etm_starting_cpu()/etm_dying_cpu() are called in not sleepable context. This poses an issue in PREEMPT_RT kernel where spinlock_t is sleepable.

To address this, change etm3's drvdata->spinlock type to raw_spin_lock_t. This will be good to align with etm4x.

Reviewed-by: Jie Gan jie.gan@oss.qualcomm.com Signed-off-by: Yeoreum Yun yeoreum.yun@arm.com --- drivers/hwtracing/coresight/coresight-etm.h | 2 +- .../coresight/coresight-etm3x-core.c | 10 +- .../coresight/coresight-etm3x-sysfs.c | 130 +++++++++--------- 3 files changed, 71 insertions(+), 71 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm.h b/drivers/hwtracing/coresight/coresight-etm.h index 1d753cca2943..40f20daded4f 100644 --- a/drivers/hwtracing/coresight/coresight-etm.h +++ b/drivers/hwtracing/coresight/coresight-etm.h @@ -232,7 +232,7 @@ struct etm_drvdata { struct csdev_access csa; struct clk *atclk; struct coresight_device *csdev; - spinlock_t spinlock; + raw_spinlock_t spinlock; int cpu; int port_size; u8 arch; diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c index 862ad0786699..60fdd87fb25d 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c @@ -512,7 +512,7 @@ static int etm_enable_sysfs(struct coresight_device *csdev, struct coresight_pat struct etm_enable_arg arg = { }; int ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock);

drvdata->traceid = path->trace_id;

@@ -536,7 +536,7 @@ static int etm_enable_sysfs(struct coresight_device *csdev, struct coresight_pat if (ret) etm_release_trace_id(drvdata);

- spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

if (!ret) dev_dbg(&csdev->dev, "ETM tracing enabled\n"); @@ -631,7 +631,7 @@ static void etm_disable_sysfs(struct coresight_device *csdev) { struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock);

/* * Executing etm_disable_hw on the cpu whose ETM is being disabled @@ -640,7 +640,7 @@ static void etm_disable_sysfs(struct coresight_device *csdev) smp_call_function_single(drvdata->cpu, etm_disable_sysfs_smp_call, drvdata, 1);

- spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

/* * we only release trace IDs when resetting sysfs. @@ -811,7 +811,7 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)

desc.access = drvdata->csa = CSDEV_ACCESS_IOMEM(base);

- spin_lock_init(&drvdata->spinlock); + raw_spin_lock_init(&drvdata->spinlock);

drvdata->atclk = devm_clk_get_optional_enabled(dev, "atclk"); if (IS_ERR(drvdata->atclk)) diff --git a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c index 762109307b86..42b12c33516b 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c @@ -49,13 +49,13 @@ static ssize_t etmsr_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);

pm_runtime_get_sync(dev->parent); - spin_lock_irqsave(&drvdata->spinlock, flags); + raw_spin_lock_irqsave(&drvdata->spinlock, flags); CS_UNLOCK(drvdata->csa.base);

val = etm_readl(drvdata, ETMSR);

CS_LOCK(drvdata->csa.base); - spin_unlock_irqrestore(&drvdata->spinlock, flags); + raw_spin_unlock_irqrestore(&drvdata->spinlock, flags); pm_runtime_put(dev->parent);

return sprintf(buf, "%#lx\n", val); @@ -76,7 +76,7 @@ static ssize_t reset_store(struct device *dev, return ret;

if (val) { - spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); memset(config, 0, sizeof(struct etm_config)); config->mode = ETM_MODE_EXCLUDE; config->trigger_event = ETM_DEFAULT_EVENT_VAL; @@ -86,7 +86,7 @@ static ssize_t reset_store(struct device *dev,

etm_set_default(config); etm_release_trace_id(drvdata); - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); }

return size; @@ -117,7 +117,7 @@ static ssize_t mode_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->mode = val & ETM_MODE_ALL;

if (config->mode & ETM_MODE_EXCLUDE) @@ -168,12 +168,12 @@ static ssize_t mode_store(struct device *dev, if (config->mode & (ETM_MODE_EXCL_KERN | ETM_MODE_EXCL_USER)) etm_config_trace_mode(config);

- spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size;

err_unlock: - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return ret; } static DEVICE_ATTR_RW(mode); @@ -299,9 +299,9 @@ static ssize_t addr_idx_store(struct device *dev, * Use spinlock to ensure index doesn't change while it gets * dereferenced multiple times within a spinlock block elsewhere. */ - spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->addr_idx = val; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -315,16 +315,16 @@ static ssize_t addr_single_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE || config->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EINVAL; }

val = config->addr_val[idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -343,17 +343,17 @@ static ssize_t addr_single_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE || config->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EINVAL; }

config->addr_val[idx] = val; config->addr_type[idx] = ETM_ADDR_TYPE_SINGLE; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -367,23 +367,23 @@ static ssize_t addr_range_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (idx % 2 != 0) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; } if (!((config->addr_type[idx] == ETM_ADDR_TYPE_NONE && config->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || (config->addr_type[idx] == ETM_ADDR_TYPE_RANGE && config->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; }

val1 = config->addr_val[idx]; val2 = config->addr_val[idx + 1]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx %#lx\n", val1, val2); } @@ -403,17 +403,17 @@ static ssize_t addr_range_store(struct device *dev, if (val1 > val2) return -EINVAL;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (idx % 2 != 0) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; } if (!((config->addr_type[idx] == ETM_ADDR_TYPE_NONE && config->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || (config->addr_type[idx] == ETM_ADDR_TYPE_RANGE && config->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; }

@@ -422,7 +422,7 @@ static ssize_t addr_range_store(struct device *dev, config->addr_val[idx + 1] = val2; config->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE; config->enable_ctrl1 |= (1 << (idx/2)); - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -436,16 +436,16 @@ static ssize_t addr_start_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE || config->addr_type[idx] == ETM_ADDR_TYPE_START)) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; }

val = config->addr_val[idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -464,11 +464,11 @@ static ssize_t addr_start_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE || config->addr_type[idx] == ETM_ADDR_TYPE_START)) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; }

@@ -476,7 +476,7 @@ static ssize_t addr_start_store(struct device *dev, config->addr_type[idx] = ETM_ADDR_TYPE_START; config->startstop_ctrl |= (1 << idx); config->enable_ctrl1 |= ETMTECR1_START_STOP; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -490,16 +490,16 @@ static ssize_t addr_stop_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE || config->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; }

val = config->addr_val[idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -518,11 +518,11 @@ static ssize_t addr_stop_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); idx = config->addr_idx; if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE || config->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return -EPERM; }

@@ -530,7 +530,7 @@ static ssize_t addr_stop_store(struct device *dev, config->addr_type[idx] = ETM_ADDR_TYPE_STOP; config->startstop_ctrl |= (1 << (idx + 16)); config->enable_ctrl1 |= ETMTECR1_START_STOP; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -543,9 +543,9 @@ static ssize_t addr_acctype_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); val = config->addr_acctype[config->addr_idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -563,9 +563,9 @@ static ssize_t addr_acctype_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->addr_acctype[config->addr_idx] = val; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -601,9 +601,9 @@ static ssize_t cntr_idx_store(struct device *dev, * Use spinlock to ensure index doesn't change while it gets * dereferenced multiple times within a spinlock block elsewhere. */ - spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->cntr_idx = val; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -616,9 +616,9 @@ static ssize_t cntr_rld_val_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); val = config->cntr_rld_val[config->cntr_idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -636,9 +636,9 @@ static ssize_t cntr_rld_val_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->cntr_rld_val[config->cntr_idx] = val; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -651,9 +651,9 @@ static ssize_t cntr_event_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); val = config->cntr_event[config->cntr_idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -671,9 +671,9 @@ static ssize_t cntr_event_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->cntr_event[config->cntr_idx] = val & ETM_EVENT_MASK; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -686,9 +686,9 @@ static ssize_t cntr_rld_event_show(struct device *dev, struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etm_config *config = &drvdata->config;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); val = config->cntr_rld_event[config->cntr_idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -706,9 +706,9 @@ static ssize_t cntr_rld_event_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->cntr_rld_event[config->cntr_idx] = val & ETM_EVENT_MASK; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -723,11 +723,11 @@ static ssize_t cntr_val_show(struct device *dev, struct etm_config *config = &drvdata->config;

if (!coresight_get_mode(drvdata->csdev)) { - spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); for (i = 0; i < drvdata->nr_cntr; i++) ret += sprintf(buf, "counter %d: %x\n", i, config->cntr_val[i]); - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock); return ret; }

@@ -752,9 +752,9 @@ static ssize_t cntr_val_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->cntr_val[config->cntr_idx] = val; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -947,13 +947,13 @@ static ssize_t seq_curr_state_show(struct device *dev, }

pm_runtime_get_sync(dev->parent); - spin_lock_irqsave(&drvdata->spinlock, flags); + raw_spin_lock_irqsave(&drvdata->spinlock, flags);

CS_UNLOCK(drvdata->csa.base); val = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK); CS_LOCK(drvdata->csa.base);

- spin_unlock_irqrestore(&drvdata->spinlock, flags); + raw_spin_unlock_irqrestore(&drvdata->spinlock, flags); pm_runtime_put(dev->parent); out: return sprintf(buf, "%#lx\n", val); @@ -1012,9 +1012,9 @@ static ssize_t ctxid_idx_store(struct device *dev, * Use spinlock to ensure index doesn't change while it gets * dereferenced multiple times within a spinlock block elsewhere. */ - spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->ctxid_idx = val; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; } @@ -1034,9 +1034,9 @@ static ssize_t ctxid_pid_show(struct device *dev, if (task_active_pid_ns(current) != &init_pid_ns) return -EINVAL;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); val = config->ctxid_pid[config->ctxid_idx]; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return sprintf(buf, "%#lx\n", val); } @@ -1066,9 +1066,9 @@ static ssize_t ctxid_pid_store(struct device *dev, if (ret) return ret;

- spin_lock(&drvdata->spinlock); + raw_spin_lock(&drvdata->spinlock); config->ctxid_pid[config->ctxid_idx] = pid; - spin_unlock(&drvdata->spinlock); + raw_spin_unlock(&drvdata->spinlock);

return size; }