diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-etm4x.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x.c | 2431 |
1 files changed, 277 insertions, 2154 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index a6707642bb23..462f0dc15757 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -15,7 +15,6 @@ #include <linux/init.h> #include <linux/types.h> #include <linux/device.h> -#include <linux/module.h> #include <linux/io.h> #include <linux/err.h> #include <linux/fs.h> @@ -27,14 +26,19 @@ #include <linux/clk.h> #include <linux/cpu.h> #include <linux/coresight.h> +#include <linux/coresight-pmu.h> #include <linux/pm_wakeup.h> #include <linux/amba/bus.h> #include <linux/seq_file.h> #include <linux/uaccess.h> +#include <linux/perf_event.h> #include <linux/pm_runtime.h> +#include <linux/perf_event.h> #include <asm/sections.h> +#include <asm/local.h> #include "coresight-etm4x.h" +#include "coresight-etm-perf.h" static int boot_enable; module_param_named(boot_enable, boot_enable, int, S_IRUGO); @@ -42,13 +46,13 @@ module_param_named(boot_enable, boot_enable, int, S_IRUGO); /* The number of ETMv4 currently registered */ static int etm4_count; static struct etmv4_drvdata *etmdrvdata[NR_CPUS]; +static void etm4_set_default(struct etmv4_config *config); -static void etm4_os_unlock(void *info) +static void etm4_os_unlock(struct etmv4_drvdata *drvdata) { - struct etmv4_drvdata *drvdata = (struct etmv4_drvdata *)info; - /* Writing any value to ETMOSLAR unlocks the trace registers */ writel_relaxed(0x0, drvdata->base + TRCOSLAR); + drvdata->os_unlock = true; isb(); } @@ -63,16 +67,22 @@ static bool etm4_arch_supported(u8 arch) return true; } +static int etm4_cpu_id(struct coresight_device *csdev) +{ + struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + + return drvdata->cpu; +} + static int etm4_trace_id(struct coresight_device *csdev) { struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); unsigned long flags; int trace_id = -1; - if (!drvdata->enable) + if (!local_read(&drvdata->mode)) return drvdata->trcid; - pm_runtime_get_sync(drvdata->dev); spin_lock_irqsave(&drvdata->spinlock, flags); CS_UNLOCK(drvdata->base); @@ -81,7 +91,6 @@ static int etm4_trace_id(struct coresight_device *csdev) CS_LOCK(drvdata->base); spin_unlock_irqrestore(&drvdata->spinlock, flags); - pm_runtime_put(drvdata->dev); return trace_id; } @@ -90,6 +99,7 @@ static void etm4_enable_hw(void *info) { int i; struct etmv4_drvdata *drvdata = info; + struct etmv4_config *config = &drvdata->config; CS_UNLOCK(drvdata->base); @@ -104,69 +114,69 @@ static void etm4_enable_hw(void *info) "timeout observed when probing at offset %#x\n", TRCSTATR); - writel_relaxed(drvdata->pe_sel, drvdata->base + TRCPROCSELR); - writel_relaxed(drvdata->cfg, drvdata->base + TRCCONFIGR); + writel_relaxed(config->pe_sel, drvdata->base + TRCPROCSELR); + writel_relaxed(config->cfg, drvdata->base + TRCCONFIGR); /* nothing specific implemented */ writel_relaxed(0x0, drvdata->base + TRCAUXCTLR); - writel_relaxed(drvdata->eventctrl0, drvdata->base + TRCEVENTCTL0R); - writel_relaxed(drvdata->eventctrl1, drvdata->base + TRCEVENTCTL1R); - writel_relaxed(drvdata->stall_ctrl, drvdata->base + TRCSTALLCTLR); - writel_relaxed(drvdata->ts_ctrl, drvdata->base + TRCTSCTLR); - writel_relaxed(drvdata->syncfreq, drvdata->base + TRCSYNCPR); - writel_relaxed(drvdata->ccctlr, drvdata->base + TRCCCCTLR); - writel_relaxed(drvdata->bb_ctrl, drvdata->base + TRCBBCTLR); + writel_relaxed(config->eventctrl0, drvdata->base + TRCEVENTCTL0R); + writel_relaxed(config->eventctrl1, drvdata->base + TRCEVENTCTL1R); + writel_relaxed(config->stall_ctrl, drvdata->base + TRCSTALLCTLR); + writel_relaxed(config->ts_ctrl, drvdata->base + TRCTSCTLR); + writel_relaxed(config->syncfreq, drvdata->base + TRCSYNCPR); + writel_relaxed(config->ccctlr, drvdata->base + TRCCCCTLR); + writel_relaxed(config->bb_ctrl, drvdata->base + TRCBBCTLR); writel_relaxed(drvdata->trcid, drvdata->base + TRCTRACEIDR); - writel_relaxed(drvdata->vinst_ctrl, drvdata->base + TRCVICTLR); - writel_relaxed(drvdata->viiectlr, drvdata->base + TRCVIIECTLR); - writel_relaxed(drvdata->vissctlr, + writel_relaxed(config->vinst_ctrl, drvdata->base + TRCVICTLR); + writel_relaxed(config->viiectlr, drvdata->base + TRCVIIECTLR); + writel_relaxed(config->vissctlr, drvdata->base + TRCVISSCTLR); - writel_relaxed(drvdata->vipcssctlr, + writel_relaxed(config->vipcssctlr, drvdata->base + TRCVIPCSSCTLR); for (i = 0; i < drvdata->nrseqstate - 1; i++) - writel_relaxed(drvdata->seq_ctrl[i], + writel_relaxed(config->seq_ctrl[i], drvdata->base + TRCSEQEVRn(i)); - writel_relaxed(drvdata->seq_rst, drvdata->base + TRCSEQRSTEVR); - writel_relaxed(drvdata->seq_state, drvdata->base + TRCSEQSTR); - writel_relaxed(drvdata->ext_inp, drvdata->base + TRCEXTINSELR); + writel_relaxed(config->seq_rst, drvdata->base + TRCSEQRSTEVR); + writel_relaxed(config->seq_state, drvdata->base + TRCSEQSTR); + writel_relaxed(config->ext_inp, drvdata->base + TRCEXTINSELR); for (i = 0; i < drvdata->nr_cntr; i++) { - writel_relaxed(drvdata->cntrldvr[i], + writel_relaxed(config->cntrldvr[i], drvdata->base + TRCCNTRLDVRn(i)); - writel_relaxed(drvdata->cntr_ctrl[i], + writel_relaxed(config->cntr_ctrl[i], drvdata->base + TRCCNTCTLRn(i)); - writel_relaxed(drvdata->cntr_val[i], + writel_relaxed(config->cntr_val[i], drvdata->base + TRCCNTVRn(i)); } /* Resource selector pair 0 is always implemented and reserved */ - for (i = 2; i < drvdata->nr_resource * 2; i++) - writel_relaxed(drvdata->res_ctrl[i], + for (i = 0; i < drvdata->nr_resource * 2; i++) + writel_relaxed(config->res_ctrl[i], drvdata->base + TRCRSCTLRn(i)); for (i = 0; i < drvdata->nr_ss_cmp; i++) { - writel_relaxed(drvdata->ss_ctrl[i], + writel_relaxed(config->ss_ctrl[i], drvdata->base + TRCSSCCRn(i)); - writel_relaxed(drvdata->ss_status[i], + writel_relaxed(config->ss_status[i], drvdata->base + TRCSSCSRn(i)); - writel_relaxed(drvdata->ss_pe_cmp[i], + writel_relaxed(config->ss_pe_cmp[i], drvdata->base + TRCSSPCICRn(i)); } for (i = 0; i < drvdata->nr_addr_cmp; i++) { - writeq_relaxed(drvdata->addr_val[i], + writeq_relaxed(config->addr_val[i], drvdata->base + TRCACVRn(i)); - writeq_relaxed(drvdata->addr_acc[i], + writeq_relaxed(config->addr_acc[i], drvdata->base + TRCACATRn(i)); } for (i = 0; i < drvdata->numcidc; i++) - writeq_relaxed(drvdata->ctxid_pid[i], + writeq_relaxed(config->ctxid_pid[i], drvdata->base + TRCCIDCVRn(i)); - writel_relaxed(drvdata->ctxid_mask0, drvdata->base + TRCCIDCCTLR0); - writel_relaxed(drvdata->ctxid_mask1, drvdata->base + TRCCIDCCTLR1); + writel_relaxed(config->ctxid_mask0, drvdata->base + TRCCIDCCTLR0); + writel_relaxed(config->ctxid_mask1, drvdata->base + TRCCIDCCTLR1); for (i = 0; i < drvdata->numvmidc; i++) - writeq_relaxed(drvdata->vmid_val[i], + writeq_relaxed(config->vmid_val[i], drvdata->base + TRCVMIDCVRn(i)); - writel_relaxed(drvdata->vmid_mask0, drvdata->base + TRCVMIDCCTLR0); - writel_relaxed(drvdata->vmid_mask1, drvdata->base + TRCVMIDCCTLR1); + writel_relaxed(config->vmid_mask0, drvdata->base + TRCVMIDCCTLR0); + writel_relaxed(config->vmid_mask1, drvdata->base + TRCVMIDCCTLR1); /* Enable the trace unit */ writel_relaxed(1, drvdata->base + TRCPRGCTLR); @@ -182,2122 +192,210 @@ static void etm4_enable_hw(void *info) dev_dbg(drvdata->dev, "cpu: %d enable smp call done\n", drvdata->cpu); } -static int etm4_enable(struct coresight_device *csdev) +static int etm4_parse_event_config(struct etmv4_drvdata *drvdata, + struct perf_event_attr *attr) { - struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - int ret; - - pm_runtime_get_sync(drvdata->dev); - spin_lock(&drvdata->spinlock); - - /* - * Executing etm4_enable_hw on the cpu whose ETM is being enabled - * ensures that register writes occur when cpu is powered. - */ - ret = smp_call_function_single(drvdata->cpu, - etm4_enable_hw, drvdata, 1); - if (ret) - goto err; - drvdata->enable = true; - drvdata->sticky_enable = true; + struct etmv4_config *config = &drvdata->config; - spin_unlock(&drvdata->spinlock); - - dev_info(drvdata->dev, "ETM tracing enabled\n"); - return 0; -err: - spin_unlock(&drvdata->spinlock); - pm_runtime_put(drvdata->dev); - return ret; -} - -static void etm4_disable_hw(void *info) -{ - u32 control; - struct etmv4_drvdata *drvdata = info; - - CS_UNLOCK(drvdata->base); - - control = readl_relaxed(drvdata->base + TRCPRGCTLR); - - /* EN, bit[0] Trace unit enable bit */ - control &= ~0x1; - - /* make sure everything completes before disabling */ - mb(); - isb(); - writel_relaxed(control, drvdata->base + TRCPRGCTLR); + if (!attr) + return -EINVAL; - CS_LOCK(drvdata->base); + /* Clear configuration from previous run */ + memset(config, 0, sizeof(struct etmv4_config)); - dev_dbg(drvdata->dev, "cpu: %d disable smp call done\n", drvdata->cpu); -} + if (attr->exclude_kernel) + config->mode = ETM_MODE_EXCL_KERN; -static void etm4_disable(struct coresight_device *csdev) -{ - struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + if (attr->exclude_user) + config->mode = ETM_MODE_EXCL_USER; - /* - * Taking hotplug lock here protects from clocks getting disabled - * with tracing being left on (crash scenario) if user disable occurs - * after cpu online mask indicates the cpu is offline but before the - * DYING hotplug callback is serviced by the ETM driver. - */ - get_online_cpus(); - spin_lock(&drvdata->spinlock); + /* Always start from the default config */ + etm4_set_default(config); /* - * Executing etm4_disable_hw on the cpu whose ETM is being disabled - * ensures that register writes occur when cpu is powered. + * By default the tracers are configured to trace the whole address + * range. Narrow the field only if requested by user space. */ - smp_call_function_single(drvdata->cpu, etm4_disable_hw, drvdata, 1); - drvdata->enable = false; - - spin_unlock(&drvdata->spinlock); - put_online_cpus(); + if (config->mode) + etm4_config_trace_mode(config); - pm_runtime_put(drvdata->dev); + /* Go from generic option to ETMv4 specifics */ + if (attr->config & BIT(ETM_OPT_CYCACC)) + config->cfg |= ETMv4_MODE_CYCACC; + if (attr->config & BIT(ETM_OPT_TS)) + config->cfg |= ETMv4_MODE_TIMESTAMP; - dev_info(drvdata->dev, "ETM tracing disabled\n"); -} - -static const struct coresight_ops_source etm4_source_ops = { - .trace_id = etm4_trace_id, - .enable = etm4_enable, - .disable = etm4_disable, -}; - -static const struct coresight_ops etm4_cs_ops = { - .source_ops = &etm4_source_ops, -}; - -static int etm4_set_mode_exclude(struct etmv4_drvdata *drvdata, bool exclude) -{ - u8 idx = drvdata->addr_idx; - - /* - * TRCACATRn.TYPE bit[1:0]: type of comparison - * the trace unit performs - */ - if (BMVAL(drvdata->addr_acc[idx], 0, 1) == ETM_INSTR_ADDR) { - if (idx % 2 != 0) - return -EINVAL; - - /* - * We are performing instruction address comparison. Set the - * relevant bit of ViewInst Include/Exclude Control register - * for corresponding address comparator pair. - */ - if (drvdata->addr_type[idx] != ETM_ADDR_TYPE_RANGE || - drvdata->addr_type[idx + 1] != ETM_ADDR_TYPE_RANGE) - return -EINVAL; - - if (exclude == true) { - /* - * Set exclude bit and unset the include bit - * corresponding to comparator pair - */ - drvdata->viiectlr |= BIT(idx / 2 + 16); - drvdata->viiectlr &= ~BIT(idx / 2); - } else { - /* - * Set include bit and unset exclude bit - * corresponding to comparator pair - */ - drvdata->viiectlr |= BIT(idx / 2); - drvdata->viiectlr &= ~BIT(idx / 2 + 16); - } - } return 0; } -static ssize_t nr_pe_cmp_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->nr_pe_cmp; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(nr_pe_cmp); - -static ssize_t nr_addr_cmp_show(struct device *dev, - struct device_attribute *attr, - char *buf) +static int etm4_enable_perf(struct coresight_device *csdev, + struct perf_event_attr *attr) { - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->nr_addr_cmp; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(nr_addr_cmp); - -static ssize_t nr_cntr_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->nr_cntr; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(nr_cntr); - -static ssize_t nr_ext_inp_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->nr_ext_inp; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(nr_ext_inp); - -static ssize_t numcidc_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->numcidc; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(numcidc); - -static ssize_t numvmidc_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->numvmidc; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(numvmidc); - -static ssize_t nrseqstate_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->nrseqstate; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(nrseqstate); - -static ssize_t nr_resource_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->nr_resource; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(nr_resource); - -static ssize_t nr_ss_cmp_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->nr_ss_cmp; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static DEVICE_ATTR_RO(nr_ss_cmp); - -static ssize_t reset_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - int i; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - if (kstrtoul(buf, 16, &val)) + if (WARN_ON_ONCE(drvdata->cpu != smp_processor_id())) return -EINVAL; - spin_lock(&drvdata->spinlock); - if (val) - drvdata->mode = 0x0; - - /* Disable data tracing: do not trace load and store data transfers */ - drvdata->mode &= ~(ETM_MODE_LOAD | ETM_MODE_STORE); - drvdata->cfg &= ~(BIT(1) | BIT(2)); - - /* Disable data value and data address tracing */ - drvdata->mode &= ~(ETM_MODE_DATA_TRACE_ADDR | - ETM_MODE_DATA_TRACE_VAL); - drvdata->cfg &= ~(BIT(16) | BIT(17)); - - /* Disable all events tracing */ - drvdata->eventctrl0 = 0x0; - drvdata->eventctrl1 = 0x0; + /* Configure the tracer based on the session's specifics */ + etm4_parse_event_config(drvdata, attr); + /* And enable it */ + etm4_enable_hw(drvdata); - /* Disable timestamp event */ - drvdata->ts_ctrl = 0x0; - - /* Disable stalling */ - drvdata->stall_ctrl = 0x0; - - /* Reset trace synchronization period to 2^8 = 256 bytes*/ - if (drvdata->syncpr == false) - drvdata->syncfreq = 0x8; - - /* - * Enable ViewInst to trace everything with start-stop logic in - * started state. ARM recommends start-stop logic is set before - * each trace run. - */ - drvdata->vinst_ctrl |= BIT(0); - if (drvdata->nr_addr_cmp == true) { - drvdata->mode |= ETM_MODE_VIEWINST_STARTSTOP; - /* SSSTATUS, bit[9] */ - drvdata->vinst_ctrl |= BIT(9); - } - - /* No address range filtering for ViewInst */ - drvdata->viiectlr = 0x0; - - /* No start-stop filtering for ViewInst */ - drvdata->vissctlr = 0x0; - - /* Disable seq events */ - for (i = 0; i < drvdata->nrseqstate-1; i++) - drvdata->seq_ctrl[i] = 0x0; - drvdata->seq_rst = 0x0; - drvdata->seq_state = 0x0; - - /* Disable external input events */ - drvdata->ext_inp = 0x0; - - drvdata->cntr_idx = 0x0; - for (i = 0; i < drvdata->nr_cntr; i++) { - drvdata->cntrldvr[i] = 0x0; - drvdata->cntr_ctrl[i] = 0x0; - drvdata->cntr_val[i] = 0x0; - } - - /* Resource selector pair 0 is always implemented and reserved */ - drvdata->res_idx = 0x2; - for (i = 2; i < drvdata->nr_resource * 2; i++) - drvdata->res_ctrl[i] = 0x0; - - for (i = 0; i < drvdata->nr_ss_cmp; i++) { - drvdata->ss_ctrl[i] = 0x0; - drvdata->ss_pe_cmp[i] = 0x0; - } - - drvdata->addr_idx = 0x0; - for (i = 0; i < drvdata->nr_addr_cmp * 2; i++) { - drvdata->addr_val[i] = 0x0; - drvdata->addr_acc[i] = 0x0; - drvdata->addr_type[i] = ETM_ADDR_TYPE_NONE; - } - - drvdata->ctxid_idx = 0x0; - for (i = 0; i < drvdata->numcidc; i++) { - drvdata->ctxid_pid[i] = 0x0; - drvdata->ctxid_vpid[i] = 0x0; - } - - drvdata->ctxid_mask0 = 0x0; - drvdata->ctxid_mask1 = 0x0; - - drvdata->vmid_idx = 0x0; - for (i = 0; i < drvdata->numvmidc; i++) - drvdata->vmid_val[i] = 0x0; - drvdata->vmid_mask0 = 0x0; - drvdata->vmid_mask1 = 0x0; - - drvdata->trcid = drvdata->cpu + 1; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_WO(reset); - -static ssize_t mode_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->mode; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); + return 0; } -static ssize_t mode_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) +static int etm4_enable_sysfs(struct coresight_device *csdev) { - unsigned long val, mode; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; + struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + int ret; spin_lock(&drvdata->spinlock); - drvdata->mode = val & ETMv4_MODE_ALL; - - if (drvdata->mode & ETM_MODE_EXCLUDE) - etm4_set_mode_exclude(drvdata, true); - else - etm4_set_mode_exclude(drvdata, false); - - if (drvdata->instrp0 == true) { - /* start by clearing instruction P0 field */ - drvdata->cfg &= ~(BIT(1) | BIT(2)); - if (drvdata->mode & ETM_MODE_LOAD) - /* 0b01 Trace load instructions as P0 instructions */ - drvdata->cfg |= BIT(1); - if (drvdata->mode & ETM_MODE_STORE) - /* 0b10 Trace store instructions as P0 instructions */ - drvdata->cfg |= BIT(2); - if (drvdata->mode & ETM_MODE_LOAD_STORE) - /* - * 0b11 Trace load and store instructions - * as P0 instructions - */ - drvdata->cfg |= BIT(1) | BIT(2); - } - - /* bit[3], Branch broadcast mode */ - if ((drvdata->mode & ETM_MODE_BB) && (drvdata->trcbb == true)) - drvdata->cfg |= BIT(3); - else - drvdata->cfg &= ~BIT(3); - - /* bit[4], Cycle counting instruction trace bit */ - if ((drvdata->mode & ETMv4_MODE_CYCACC) && - (drvdata->trccci == true)) - drvdata->cfg |= BIT(4); - else - drvdata->cfg &= ~BIT(4); - - /* bit[6], Context ID tracing bit */ - if ((drvdata->mode & ETMv4_MODE_CTXID) && (drvdata->ctxid_size)) - drvdata->cfg |= BIT(6); - else - drvdata->cfg &= ~BIT(6); - - if ((drvdata->mode & ETM_MODE_VMID) && (drvdata->vmid_size)) - drvdata->cfg |= BIT(7); - else - drvdata->cfg &= ~BIT(7); - - /* bits[10:8], Conditional instruction tracing bit */ - mode = ETM_MODE_COND(drvdata->mode); - if (drvdata->trccond == true) { - drvdata->cfg &= ~(BIT(8) | BIT(9) | BIT(10)); - drvdata->cfg |= mode << 8; - } - - /* bit[11], Global timestamp tracing bit */ - if ((drvdata->mode & ETMv4_MODE_TIMESTAMP) && (drvdata->ts_size)) - drvdata->cfg |= BIT(11); - else - drvdata->cfg &= ~BIT(11); - /* bit[12], Return stack enable bit */ - if ((drvdata->mode & ETM_MODE_RETURNSTACK) && - (drvdata->retstack == true)) - drvdata->cfg |= BIT(12); - else - drvdata->cfg &= ~BIT(12); - - /* bits[14:13], Q element enable field */ - mode = ETM_MODE_QELEM(drvdata->mode); - /* start by clearing QE bits */ - drvdata->cfg &= ~(BIT(13) | BIT(14)); - /* if supported, Q elements with instruction counts are enabled */ - if ((mode & BIT(0)) && (drvdata->q_support & BIT(0))) - drvdata->cfg |= BIT(13); /* - * if supported, Q elements with and without instruction - * counts are enabled + * Executing etm4_enable_hw on the cpu whose ETM is being enabled + * ensures that register writes occur when cpu is powered. */ - if ((mode & BIT(1)) && (drvdata->q_support & BIT(1))) - drvdata->cfg |= BIT(14); - - /* bit[11], AMBA Trace Bus (ATB) trigger enable bit */ - if ((drvdata->mode & ETM_MODE_ATB_TRIGGER) && - (drvdata->atbtrig == true)) - drvdata->eventctrl1 |= BIT(11); - else - drvdata->eventctrl1 &= ~BIT(11); - - /* bit[12], Low-power state behavior override bit */ - if ((drvdata->mode & ETM_MODE_LPOVERRIDE) && - (drvdata->lpoverride == true)) - drvdata->eventctrl1 |= BIT(12); - else - drvdata->eventctrl1 &= ~BIT(12); - - /* bit[8], Instruction stall bit */ - if (drvdata->mode & ETM_MODE_ISTALL_EN) - drvdata->stall_ctrl |= BIT(8); - else - drvdata->stall_ctrl &= ~BIT(8); - - /* bit[10], Prioritize instruction trace bit */ - if (drvdata->mode & ETM_MODE_INSTPRIO) - drvdata->stall_ctrl |= BIT(10); - else - drvdata->stall_ctrl &= ~BIT(10); - - /* bit[13], Trace overflow prevention bit */ - if ((drvdata->mode & ETM_MODE_NOOVERFLOW) && - (drvdata->nooverflow == true)) - drvdata->stall_ctrl |= BIT(13); - else - drvdata->stall_ctrl &= ~BIT(13); - - /* bit[9] Start/stop logic control bit */ - if (drvdata->mode & ETM_MODE_VIEWINST_STARTSTOP) - drvdata->vinst_ctrl |= BIT(9); - else - drvdata->vinst_ctrl &= ~BIT(9); - - /* bit[10], Whether a trace unit must trace a Reset exception */ - if (drvdata->mode & ETM_MODE_TRACE_RESET) - drvdata->vinst_ctrl |= BIT(10); - else - drvdata->vinst_ctrl &= ~BIT(10); - - /* bit[11], Whether a trace unit must trace a system error exception */ - if ((drvdata->mode & ETM_MODE_TRACE_ERR) && - (drvdata->trc_error == true)) - drvdata->vinst_ctrl |= BIT(11); - else - drvdata->vinst_ctrl &= ~BIT(11); - - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(mode); - -static ssize_t pe_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->pe_sel; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t pe_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - if (val > drvdata->nr_pe) { - spin_unlock(&drvdata->spinlock); - return -EINVAL; - } + ret = smp_call_function_single(drvdata->cpu, + etm4_enable_hw, drvdata, 1); + if (ret) + goto err; - drvdata->pe_sel = val; + drvdata->sticky_enable = true; spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(pe); - -static ssize_t event_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->eventctrl0; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} -static ssize_t event_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; + dev_info(drvdata->dev, "ETM tracing enabled\n"); + return 0; - spin_lock(&drvdata->spinlock); - switch (drvdata->nr_event) { - case 0x0: - /* EVENT0, bits[7:0] */ - drvdata->eventctrl0 = val & 0xFF; - break; - case 0x1: - /* EVENT1, bits[15:8] */ - drvdata->eventctrl0 = val & 0xFFFF; - break; - case 0x2: - /* EVENT2, bits[23:16] */ - drvdata->eventctrl0 = val & 0xFFFFFF; - break; - case 0x3: - /* EVENT3, bits[31:24] */ - drvdata->eventctrl0 = val; - break; - default: - break; - } +err: spin_unlock(&drvdata->spinlock); - return size; + return ret; } -static DEVICE_ATTR_RW(event); -static ssize_t event_instren_show(struct device *dev, - struct device_attribute *attr, - char *buf) +static int etm4_enable(struct coresight_device *csdev, + struct perf_event_attr *attr, u32 mode) { - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + int ret; + u32 val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - val = BMVAL(drvdata->eventctrl1, 0, 3); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} + val = local_cmpxchg(&drvdata->mode, CS_MODE_DISABLED, mode); -static ssize_t event_instren_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; + /* Someone is already using the tracer */ + if (val) + return -EBUSY; - spin_lock(&drvdata->spinlock); - /* start by clearing all instruction event enable bits */ - drvdata->eventctrl1 &= ~(BIT(0) | BIT(1) | BIT(2) | BIT(3)); - switch (drvdata->nr_event) { - case 0x0: - /* generate Event element for event 1 */ - drvdata->eventctrl1 |= val & BIT(1); - break; - case 0x1: - /* generate Event element for event 1 and 2 */ - drvdata->eventctrl1 |= val & (BIT(0) | BIT(1)); - break; - case 0x2: - /* generate Event element for event 1, 2 and 3 */ - drvdata->eventctrl1 |= val & (BIT(0) | BIT(1) | BIT(2)); + switch (mode) { + case CS_MODE_SYSFS: + ret = etm4_enable_sysfs(csdev); break; - case 0x3: - /* generate Event element for all 4 events */ - drvdata->eventctrl1 |= val & 0xF; + case CS_MODE_PERF: + ret = etm4_enable_perf(csdev, attr); break; default: - break; - } - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(event_instren); - -static ssize_t event_ts_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->ts_ctrl; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t event_ts_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (!drvdata->ts_size) - return -EINVAL; - - drvdata->ts_ctrl = val & ETMv4_EVENT_MASK; - return size; -} -static DEVICE_ATTR_RW(event_ts); - -static ssize_t syncfreq_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->syncfreq; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t syncfreq_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (drvdata->syncpr == true) - return -EINVAL; - - drvdata->syncfreq = val & ETMv4_SYNC_MASK; - return size; -} -static DEVICE_ATTR_RW(syncfreq); - -static ssize_t cyc_threshold_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->ccctlr; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t cyc_threshold_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val < drvdata->ccitmin) - return -EINVAL; - - drvdata->ccctlr = val & ETM_CYC_THRESHOLD_MASK; - return size; -} -static DEVICE_ATTR_RW(cyc_threshold); - -static ssize_t bb_ctrl_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->bb_ctrl; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t bb_ctrl_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (drvdata->trcbb == false) - return -EINVAL; - if (!drvdata->nr_addr_cmp) - return -EINVAL; - /* - * Bit[7:0] selects which address range comparator is used for - * branch broadcast control. - */ - if (BMVAL(val, 0, 7) > drvdata->nr_addr_cmp) - return -EINVAL; - - drvdata->bb_ctrl = val; - return size; -} -static DEVICE_ATTR_RW(bb_ctrl); - -static ssize_t event_vinst_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->vinst_ctrl & ETMv4_EVENT_MASK; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t event_vinst_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - val &= ETMv4_EVENT_MASK; - drvdata->vinst_ctrl &= ~ETMv4_EVENT_MASK; - drvdata->vinst_ctrl |= val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(event_vinst); - -static ssize_t s_exlevel_vinst_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = BMVAL(drvdata->vinst_ctrl, 16, 19); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t s_exlevel_vinst_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - /* clear all EXLEVEL_S bits (bit[18] is never implemented) */ - drvdata->vinst_ctrl &= ~(BIT(16) | BIT(17) | BIT(19)); - /* enable instruction tracing for corresponding exception level */ - val &= drvdata->s_ex_level; - drvdata->vinst_ctrl |= (val << 16); - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(s_exlevel_vinst); - -static ssize_t ns_exlevel_vinst_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - /* EXLEVEL_NS, bits[23:20] */ - val = BMVAL(drvdata->vinst_ctrl, 20, 23); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t ns_exlevel_vinst_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - /* clear EXLEVEL_NS bits (bit[23] is never implemented */ - drvdata->vinst_ctrl &= ~(BIT(20) | BIT(21) | BIT(22)); - /* enable instruction tracing for corresponding exception level */ - val &= drvdata->ns_ex_level; - drvdata->vinst_ctrl |= (val << 20); - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(ns_exlevel_vinst); - -static ssize_t addr_idx_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->addr_idx; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t addr_idx_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val >= drvdata->nr_addr_cmp * 2) - return -EINVAL; - - /* - * Use spinlock to ensure index doesn't change while it gets - * dereferenced multiple times within a spinlock block elsewhere. - */ - spin_lock(&drvdata->spinlock); - drvdata->addr_idx = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_idx); - -static ssize_t addr_instdatatype_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - ssize_t len; - u8 val, idx; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - val = BMVAL(drvdata->addr_acc[idx], 0, 1); - len = scnprintf(buf, PAGE_SIZE, "%s\n", - val == ETM_INSTR_ADDR ? "instr" : - (val == ETM_DATA_LOAD_ADDR ? "data_load" : - (val == ETM_DATA_STORE_ADDR ? "data_store" : - "data_load_store"))); - spin_unlock(&drvdata->spinlock); - return len; -} - -static ssize_t addr_instdatatype_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - char str[20] = ""; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (strlen(buf) >= 20) - return -EINVAL; - if (sscanf(buf, "%s", str) != 1) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - if (!strcmp(str, "instr")) - /* TYPE, bits[1:0] */ - drvdata->addr_acc[idx] &= ~(BIT(0) | BIT(1)); - - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_instdatatype); - -static ssize_t addr_single_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - idx = drvdata->addr_idx; - spin_lock(&drvdata->spinlock); - if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || - drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - val = (unsigned long)drvdata->addr_val[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t addr_single_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || - drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - drvdata->addr_val[idx] = (u64)val; - drvdata->addr_type[idx] = ETM_ADDR_TYPE_SINGLE; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_single); - -static ssize_t addr_range_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val1, val2; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - if (idx % 2 != 0) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE && - drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || - (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE && - drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - val1 = (unsigned long)drvdata->addr_val[idx]; - val2 = (unsigned long)drvdata->addr_val[idx + 1]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx %#lx\n", val1, val2); -} - -static ssize_t addr_range_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val1, val2; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (sscanf(buf, "%lx %lx", &val1, &val2) != 2) - return -EINVAL; - /* lower address comparator cannot have a higher address value */ - if (val1 > val2) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - if (idx % 2 != 0) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE && - drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || - (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE && - drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - drvdata->addr_val[idx] = (u64)val1; - drvdata->addr_type[idx] = ETM_ADDR_TYPE_RANGE; - drvdata->addr_val[idx + 1] = (u64)val2; - drvdata->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE; - /* - * Program include or exclude control bits for vinst or vdata - * whenever we change addr comparators to ETM_ADDR_TYPE_RANGE - */ - if (drvdata->mode & ETM_MODE_EXCLUDE) - etm4_set_mode_exclude(drvdata, true); - else - etm4_set_mode_exclude(drvdata, false); - - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_range); - -static ssize_t addr_start_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - - if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || - drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - val = (unsigned long)drvdata->addr_val[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t addr_start_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - if (!drvdata->nr_addr_cmp) { - spin_unlock(&drvdata->spinlock); - return -EINVAL; - } - if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || - drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - drvdata->addr_val[idx] = (u64)val; - drvdata->addr_type[idx] = ETM_ADDR_TYPE_START; - drvdata->vissctlr |= BIT(idx); - /* SSSTATUS, bit[9] - turn on start/stop logic */ - drvdata->vinst_ctrl |= BIT(9); - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_start); - -static ssize_t addr_stop_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - - if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || - drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - val = (unsigned long)drvdata->addr_val[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t addr_stop_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - if (!drvdata->nr_addr_cmp) { - spin_unlock(&drvdata->spinlock); - return -EINVAL; - } - if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || - drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { - spin_unlock(&drvdata->spinlock); - return -EPERM; - } - - drvdata->addr_val[idx] = (u64)val; - drvdata->addr_type[idx] = ETM_ADDR_TYPE_STOP; - drvdata->vissctlr |= BIT(idx + 16); - /* SSSTATUS, bit[9] - turn on start/stop logic */ - drvdata->vinst_ctrl |= BIT(9); - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_stop); - -static ssize_t addr_ctxtype_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - ssize_t len; - u8 idx, val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - /* CONTEXTTYPE, bits[3:2] */ - val = BMVAL(drvdata->addr_acc[idx], 2, 3); - len = scnprintf(buf, PAGE_SIZE, "%s\n", val == ETM_CTX_NONE ? "none" : - (val == ETM_CTX_CTXID ? "ctxid" : - (val == ETM_CTX_VMID ? "vmid" : "all"))); - spin_unlock(&drvdata->spinlock); - return len; -} - -static ssize_t addr_ctxtype_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - char str[10] = ""; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (strlen(buf) >= 10) - return -EINVAL; - if (sscanf(buf, "%s", str) != 1) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - if (!strcmp(str, "none")) - /* start by clearing context type bits */ - drvdata->addr_acc[idx] &= ~(BIT(2) | BIT(3)); - else if (!strcmp(str, "ctxid")) { - /* 0b01 The trace unit performs a Context ID */ - if (drvdata->numcidc) { - drvdata->addr_acc[idx] |= BIT(2); - drvdata->addr_acc[idx] &= ~BIT(3); - } - } else if (!strcmp(str, "vmid")) { - /* 0b10 The trace unit performs a VMID */ - if (drvdata->numvmidc) { - drvdata->addr_acc[idx] &= ~BIT(2); - drvdata->addr_acc[idx] |= BIT(3); - } - } else if (!strcmp(str, "all")) { - /* - * 0b11 The trace unit performs a Context ID - * comparison and a VMID - */ - if (drvdata->numcidc) - drvdata->addr_acc[idx] |= BIT(2); - if (drvdata->numvmidc) - drvdata->addr_acc[idx] |= BIT(3); + ret = -EINVAL; } - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_ctxtype); -static ssize_t addr_context_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - /* context ID comparator bits[6:4] */ - val = BMVAL(drvdata->addr_acc[idx], 4, 6); - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t addr_context_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if ((drvdata->numcidc <= 1) && (drvdata->numvmidc <= 1)) - return -EINVAL; - if (val >= (drvdata->numcidc >= drvdata->numvmidc ? - drvdata->numcidc : drvdata->numvmidc)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->addr_idx; - /* clear context ID comparator bits[6:4] */ - drvdata->addr_acc[idx] &= ~(BIT(4) | BIT(5) | BIT(6)); - drvdata->addr_acc[idx] |= (val << 4); - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(addr_context); - -static ssize_t seq_idx_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->seq_idx; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t seq_idx_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val >= drvdata->nrseqstate - 1) - return -EINVAL; - - /* - * Use spinlock to ensure index doesn't change while it gets - * dereferenced multiple times within a spinlock block elsewhere. - */ - spin_lock(&drvdata->spinlock); - drvdata->seq_idx = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(seq_idx); - -static ssize_t seq_state_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->seq_state; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t seq_state_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val >= drvdata->nrseqstate) - return -EINVAL; - - drvdata->seq_state = val; - return size; -} -static DEVICE_ATTR_RW(seq_state); - -static ssize_t seq_event_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->seq_idx; - val = drvdata->seq_ctrl[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t seq_event_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->seq_idx; - /* RST, bits[7:0] */ - drvdata->seq_ctrl[idx] = val & 0xFF; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(seq_event); - -static ssize_t seq_reset_event_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->seq_rst; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t seq_reset_event_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (!(drvdata->nrseqstate)) - return -EINVAL; - - drvdata->seq_rst = val & ETMv4_EVENT_MASK; - return size; -} -static DEVICE_ATTR_RW(seq_reset_event); - -static ssize_t cntr_idx_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->cntr_idx; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t cntr_idx_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val >= drvdata->nr_cntr) - return -EINVAL; - - /* - * Use spinlock to ensure index doesn't change while it gets - * dereferenced multiple times within a spinlock block elsewhere. - */ - spin_lock(&drvdata->spinlock); - drvdata->cntr_idx = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(cntr_idx); - -static ssize_t cntrldvr_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->cntr_idx; - val = drvdata->cntrldvr[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t cntrldvr_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val > ETM_CNTR_MAX_VAL) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->cntr_idx; - drvdata->cntrldvr[idx] = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(cntrldvr); - -static ssize_t cntr_val_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->cntr_idx; - val = drvdata->cntr_val[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t cntr_val_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val > ETM_CNTR_MAX_VAL) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->cntr_idx; - drvdata->cntr_val[idx] = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(cntr_val); - -static ssize_t cntr_ctrl_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->cntr_idx; - val = drvdata->cntr_ctrl[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t cntr_ctrl_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - idx = drvdata->cntr_idx; - drvdata->cntr_ctrl[idx] = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(cntr_ctrl); - -static ssize_t res_idx_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->res_idx; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t res_idx_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - /* Resource selector pair 0 is always implemented and reserved */ - if (val < 2 || val >= drvdata->nr_resource * 2) - return -EINVAL; + /* The tracer didn't start */ + if (ret) + local_set(&drvdata->mode, CS_MODE_DISABLED); - /* - * Use spinlock to ensure index doesn't change while it gets - * dereferenced multiple times within a spinlock block elsewhere. - */ - spin_lock(&drvdata->spinlock); - drvdata->res_idx = val; - spin_unlock(&drvdata->spinlock); - return size; + return ret; } -static DEVICE_ATTR_RW(res_idx); -static ssize_t res_ctrl_show(struct device *dev, - struct device_attribute *attr, - char *buf) +static void etm4_disable_hw(void *info) { - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + u32 control; + struct etmv4_drvdata *drvdata = info; - spin_lock(&drvdata->spinlock); - idx = drvdata->res_idx; - val = drvdata->res_ctrl[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} + CS_UNLOCK(drvdata->base); -static ssize_t res_ctrl_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + control = readl_relaxed(drvdata->base + TRCPRGCTLR); - if (kstrtoul(buf, 16, &val)) - return -EINVAL; + /* EN, bit[0] Trace unit enable bit */ + control &= ~0x1; - spin_lock(&drvdata->spinlock); - idx = drvdata->res_idx; - /* For odd idx pair inversal bit is RES0 */ - if (idx % 2 != 0) - /* PAIRINV, bit[21] */ - val &= ~BIT(21); - drvdata->res_ctrl[idx] = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(res_ctrl); + /* make sure everything completes before disabling */ + mb(); + isb(); + writel_relaxed(control, drvdata->base + TRCPRGCTLR); -static ssize_t ctxid_idx_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + CS_LOCK(drvdata->base); - val = drvdata->ctxid_idx; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); + dev_dbg(drvdata->dev, "cpu: %d disable smp call done\n", drvdata->cpu); } -static ssize_t ctxid_idx_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) +static int etm4_disable_perf(struct coresight_device *csdev) { - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val >= drvdata->numcidc) + if (WARN_ON_ONCE(drvdata->cpu != smp_processor_id())) return -EINVAL; - /* - * Use spinlock to ensure index doesn't change while it gets - * dereferenced multiple times within a spinlock block elsewhere. - */ - spin_lock(&drvdata->spinlock); - drvdata->ctxid_idx = val; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(ctxid_idx); - -static ssize_t ctxid_pid_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - u8 idx; - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - idx = drvdata->ctxid_idx; - val = (unsigned long)drvdata->ctxid_vpid[idx]; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); + etm4_disable_hw(drvdata); + return 0; } -static ssize_t ctxid_pid_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) +static void etm4_disable_sysfs(struct coresight_device *csdev) { - u8 idx; - unsigned long vpid, pid; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); /* - * only implemented when ctxid tracing is enabled, i.e. at least one - * ctxid comparator is implemented and ctxid is greater than 0 bits - * in length + * Taking hotplug lock here protects from clocks getting disabled + * with tracing being left on (crash scenario) if user disable occurs + * after cpu online mask indicates the cpu is offline but before the + * DYING hotplug callback is serviced by the ETM driver. */ - if (!drvdata->ctxid_size || !drvdata->numcidc) - return -EINVAL; - if (kstrtoul(buf, 16, &vpid)) - return -EINVAL; - - pid = coresight_vpid_to_pid(vpid); - - spin_lock(&drvdata->spinlock); - idx = drvdata->ctxid_idx; - drvdata->ctxid_pid[idx] = (u64)pid; - drvdata->ctxid_vpid[idx] = (u64)vpid; - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(ctxid_pid); - -static ssize_t ctxid_masks_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val1, val2; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - + get_online_cpus(); spin_lock(&drvdata->spinlock); - val1 = drvdata->ctxid_mask0; - val2 = drvdata->ctxid_mask1; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx %#lx\n", val1, val2); -} -static ssize_t ctxid_masks_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 i, j, maskbyte; - unsigned long val1, val2, mask; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - /* - * only implemented when ctxid tracing is enabled, i.e. at least one - * ctxid comparator is implemented and ctxid is greater than 0 bits - * in length - */ - if (!drvdata->ctxid_size || !drvdata->numcidc) - return -EINVAL; - if (sscanf(buf, "%lx %lx", &val1, &val2) != 2) - return -EINVAL; - - spin_lock(&drvdata->spinlock); - /* - * each byte[0..3] controls mask value applied to ctxid - * comparator[0..3] - */ - switch (drvdata->numcidc) { - case 0x1: - /* COMP0, bits[7:0] */ - drvdata->ctxid_mask0 = val1 & 0xFF; - break; - case 0x2: - /* COMP1, bits[15:8] */ - drvdata->ctxid_mask0 = val1 & 0xFFFF; - break; - case 0x3: - /* COMP2, bits[23:16] */ - drvdata->ctxid_mask0 = val1 & 0xFFFFFF; - break; - case 0x4: - /* COMP3, bits[31:24] */ - drvdata->ctxid_mask0 = val1; - break; - case 0x5: - /* COMP4, bits[7:0] */ - drvdata->ctxid_mask0 = val1; - drvdata->ctxid_mask1 = val2 & 0xFF; - break; - case 0x6: - /* COMP5, bits[15:8] */ - drvdata->ctxid_mask0 = val1; - drvdata->ctxid_mask1 = val2 & 0xFFFF; - break; - case 0x7: - /* COMP6, bits[23:16] */ - drvdata->ctxid_mask0 = val1; - drvdata->ctxid_mask1 = val2 & 0xFFFFFF; - break; - case 0x8: - /* COMP7, bits[31:24] */ - drvdata->ctxid_mask0 = val1; - drvdata->ctxid_mask1 = val2; - break; - default: - break; - } /* - * If software sets a mask bit to 1, it must program relevant byte - * of ctxid comparator value 0x0, otherwise behavior is unpredictable. - * For example, if bit[3] of ctxid_mask0 is 1, we must clear bits[31:24] - * of ctxid comparator0 value (corresponding to byte 0) register. + * Executing etm4_disable_hw on the cpu whose ETM is being disabled + * ensures that register writes occur when cpu is powered. */ - mask = drvdata->ctxid_mask0; - for (i = 0; i < drvdata->numcidc; i++) { - /* mask value of corresponding ctxid comparator */ - maskbyte = mask & ETMv4_EVENT_MASK; - /* - * each bit corresponds to a byte of respective ctxid comparator - * value register - */ - for (j = 0; j < 8; j++) { - if (maskbyte & 1) - drvdata->ctxid_pid[i] &= ~(0xFF << (j * 8)); - maskbyte >>= 1; - } - /* Select the next ctxid comparator mask value */ - if (i == 3) - /* ctxid comparators[4-7] */ - mask = drvdata->ctxid_mask1; - else - mask >>= 0x8; - } - - spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(ctxid_masks); - -static ssize_t vmid_idx_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->vmid_idx; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t vmid_idx_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - if (kstrtoul(buf, 16, &val)) - return -EINVAL; - if (val >= drvdata->numvmidc) - return -EINVAL; + smp_call_function_single(drvdata->cpu, etm4_disable_hw, drvdata, 1); - /* - * Use spinlock to ensure index doesn't change while it gets - * dereferenced multiple times within a spinlock block elsewhere. - */ - spin_lock(&drvdata->spinlock); - drvdata->vmid_idx = val; spin_unlock(&drvdata->spinlock); - return size; -} -static DEVICE_ATTR_RW(vmid_idx); - -static ssize_t vmid_val_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = (unsigned long)drvdata->vmid_val[drvdata->vmid_idx]; - return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); -} - -static ssize_t vmid_val_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - unsigned long val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - /* - * only implemented when vmid tracing is enabled, i.e. at least one - * vmid comparator is implemented and at least 8 bit vmid size - */ - if (!drvdata->vmid_size || !drvdata->numvmidc) - return -EINVAL; - if (kstrtoul(buf, 16, &val)) - return -EINVAL; + put_online_cpus(); - spin_lock(&drvdata->spinlock); - drvdata->vmid_val[drvdata->vmid_idx] = (u64)val; - spin_unlock(&drvdata->spinlock); - return size; + dev_info(drvdata->dev, "ETM tracing disabled\n"); } -static DEVICE_ATTR_RW(vmid_val); -static ssize_t vmid_masks_show(struct device *dev, - struct device_attribute *attr, char *buf) +static void etm4_disable(struct coresight_device *csdev) { - unsigned long val1, val2; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - spin_lock(&drvdata->spinlock); - val1 = drvdata->vmid_mask0; - val2 = drvdata->vmid_mask1; - spin_unlock(&drvdata->spinlock); - return scnprintf(buf, PAGE_SIZE, "%#lx %#lx\n", val1, val2); -} + u32 mode; + struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); -static ssize_t vmid_masks_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) -{ - u8 i, j, maskbyte; - unsigned long val1, val2, mask; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); /* - * only implemented when vmid tracing is enabled, i.e. at least one - * vmid comparator is implemented and at least 8 bit vmid size + * For as long as the tracer isn't disabled another entity can't + * change its status. As such we can read the status here without + * fearing it will change under us. */ - if (!drvdata->vmid_size || !drvdata->numvmidc) - return -EINVAL; - if (sscanf(buf, "%lx %lx", &val1, &val2) != 2) - return -EINVAL; + mode = local_read(&drvdata->mode); - spin_lock(&drvdata->spinlock); - - /* - * each byte[0..3] controls mask value applied to vmid - * comparator[0..3] - */ - switch (drvdata->numvmidc) { - case 0x1: - /* COMP0, bits[7:0] */ - drvdata->vmid_mask0 = val1 & 0xFF; - break; - case 0x2: - /* COMP1, bits[15:8] */ - drvdata->vmid_mask0 = val1 & 0xFFFF; - break; - case 0x3: - /* COMP2, bits[23:16] */ - drvdata->vmid_mask0 = val1 & 0xFFFFFF; - break; - case 0x4: - /* COMP3, bits[31:24] */ - drvdata->vmid_mask0 = val1; + switch (mode) { + case CS_MODE_DISABLED: break; - case 0x5: - /* COMP4, bits[7:0] */ - drvdata->vmid_mask0 = val1; - drvdata->vmid_mask1 = val2 & 0xFF; + case CS_MODE_SYSFS: + etm4_disable_sysfs(csdev); break; - case 0x6: - /* COMP5, bits[15:8] */ - drvdata->vmid_mask0 = val1; - drvdata->vmid_mask1 = val2 & 0xFFFF; - break; - case 0x7: - /* COMP6, bits[23:16] */ - drvdata->vmid_mask0 = val1; - drvdata->vmid_mask1 = val2 & 0xFFFFFF; - break; - case 0x8: - /* COMP7, bits[31:24] */ - drvdata->vmid_mask0 = val1; - drvdata->vmid_mask1 = val2; - break; - default: + case CS_MODE_PERF: + etm4_disable_perf(csdev); break; } - /* - * If software sets a mask bit to 1, it must program relevant byte - * of vmid comparator value 0x0, otherwise behavior is unpredictable. - * For example, if bit[3] of vmid_mask0 is 1, we must clear bits[31:24] - * of vmid comparator0 value (corresponding to byte 0) register. - */ - mask = drvdata->vmid_mask0; - for (i = 0; i < drvdata->numvmidc; i++) { - /* mask value of corresponding vmid comparator */ - maskbyte = mask & ETMv4_EVENT_MASK; - /* - * each bit corresponds to a byte of respective vmid comparator - * value register - */ - for (j = 0; j < 8; j++) { - if (maskbyte & 1) - drvdata->vmid_val[i] &= ~(0xFF << (j * 8)); - maskbyte >>= 1; - } - /* Select the next vmid comparator mask value */ - if (i == 3) - /* vmid comparators[4-7] */ - mask = drvdata->vmid_mask1; - else - mask >>= 0x8; - } - spin_unlock(&drvdata->spinlock); - return size; + if (mode) + local_set(&drvdata->mode, CS_MODE_DISABLED); } -static DEVICE_ATTR_RW(vmid_masks); - -static ssize_t cpu_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - int val; - struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); - - val = drvdata->cpu; - return scnprintf(buf, PAGE_SIZE, "%d\n", val); -} -static DEVICE_ATTR_RO(cpu); - -static struct attribute *coresight_etmv4_attrs[] = { - &dev_attr_nr_pe_cmp.attr, - &dev_attr_nr_addr_cmp.attr, - &dev_attr_nr_cntr.attr, - &dev_attr_nr_ext_inp.attr, - &dev_attr_numcidc.attr, - &dev_attr_numvmidc.attr, - &dev_attr_nrseqstate.attr, - &dev_attr_nr_resource.attr, - &dev_attr_nr_ss_cmp.attr, - &dev_attr_reset.attr, - &dev_attr_mode.attr, - &dev_attr_pe.attr, - &dev_attr_event.attr, - &dev_attr_event_instren.attr, - &dev_attr_event_ts.attr, - &dev_attr_syncfreq.attr, - &dev_attr_cyc_threshold.attr, - &dev_attr_bb_ctrl.attr, - &dev_attr_event_vinst.attr, - &dev_attr_s_exlevel_vinst.attr, - &dev_attr_ns_exlevel_vinst.attr, - &dev_attr_addr_idx.attr, - &dev_attr_addr_instdatatype.attr, - &dev_attr_addr_single.attr, - &dev_attr_addr_range.attr, - &dev_attr_addr_start.attr, - &dev_attr_addr_stop.attr, - &dev_attr_addr_ctxtype.attr, - &dev_attr_addr_context.attr, - &dev_attr_seq_idx.attr, - &dev_attr_seq_state.attr, - &dev_attr_seq_event.attr, - &dev_attr_seq_reset_event.attr, - &dev_attr_cntr_idx.attr, - &dev_attr_cntrldvr.attr, - &dev_attr_cntr_val.attr, - &dev_attr_cntr_ctrl.attr, - &dev_attr_res_idx.attr, - &dev_attr_res_ctrl.attr, - &dev_attr_ctxid_idx.attr, - &dev_attr_ctxid_pid.attr, - &dev_attr_ctxid_masks.attr, - &dev_attr_vmid_idx.attr, - &dev_attr_vmid_val.attr, - &dev_attr_vmid_masks.attr, - &dev_attr_cpu.attr, - NULL, -}; - -#define coresight_simple_func(name, offset) \ -static ssize_t name##_show(struct device *_dev, \ - struct device_attribute *attr, char *buf) \ -{ \ - struct etmv4_drvdata *drvdata = dev_get_drvdata(_dev->parent); \ - return scnprintf(buf, PAGE_SIZE, "0x%x\n", \ - readl_relaxed(drvdata->base + offset)); \ -} \ -DEVICE_ATTR_RO(name) - -coresight_simple_func(trcoslsr, TRCOSLSR); -coresight_simple_func(trcpdcr, TRCPDCR); -coresight_simple_func(trcpdsr, TRCPDSR); -coresight_simple_func(trclsr, TRCLSR); -coresight_simple_func(trcauthstatus, TRCAUTHSTATUS); -coresight_simple_func(trcdevid, TRCDEVID); -coresight_simple_func(trcdevtype, TRCDEVTYPE); -coresight_simple_func(trcpidr0, TRCPIDR0); -coresight_simple_func(trcpidr1, TRCPIDR1); -coresight_simple_func(trcpidr2, TRCPIDR2); -coresight_simple_func(trcpidr3, TRCPIDR3); - -static struct attribute *coresight_etmv4_mgmt_attrs[] = { - &dev_attr_trcoslsr.attr, - &dev_attr_trcpdcr.attr, - &dev_attr_trcpdsr.attr, - &dev_attr_trclsr.attr, - &dev_attr_trcauthstatus.attr, - &dev_attr_trcdevid.attr, - &dev_attr_trcdevtype.attr, - &dev_attr_trcpidr0.attr, - &dev_attr_trcpidr1.attr, - &dev_attr_trcpidr2.attr, - &dev_attr_trcpidr3.attr, - NULL, -}; - -coresight_simple_func(trcidr0, TRCIDR0); -coresight_simple_func(trcidr1, TRCIDR1); -coresight_simple_func(trcidr2, TRCIDR2); -coresight_simple_func(trcidr3, TRCIDR3); -coresight_simple_func(trcidr4, TRCIDR4); -coresight_simple_func(trcidr5, TRCIDR5); -/* trcidr[6,7] are reserved */ -coresight_simple_func(trcidr8, TRCIDR8); -coresight_simple_func(trcidr9, TRCIDR9); -coresight_simple_func(trcidr10, TRCIDR10); -coresight_simple_func(trcidr11, TRCIDR11); -coresight_simple_func(trcidr12, TRCIDR12); -coresight_simple_func(trcidr13, TRCIDR13); - -static struct attribute *coresight_etmv4_trcidr_attrs[] = { - &dev_attr_trcidr0.attr, - &dev_attr_trcidr1.attr, - &dev_attr_trcidr2.attr, - &dev_attr_trcidr3.attr, - &dev_attr_trcidr4.attr, - &dev_attr_trcidr5.attr, - /* trcidr[6,7] are reserved */ - &dev_attr_trcidr8.attr, - &dev_attr_trcidr9.attr, - &dev_attr_trcidr10.attr, - &dev_attr_trcidr11.attr, - &dev_attr_trcidr12.attr, - &dev_attr_trcidr13.attr, - NULL, -}; - -static const struct attribute_group coresight_etmv4_group = { - .attrs = coresight_etmv4_attrs, -}; - -static const struct attribute_group coresight_etmv4_mgmt_group = { - .attrs = coresight_etmv4_mgmt_attrs, - .name = "mgmt", -}; - -static const struct attribute_group coresight_etmv4_trcidr_group = { - .attrs = coresight_etmv4_trcidr_attrs, - .name = "trcidr", +static const struct coresight_ops_source etm4_source_ops = { + .cpu_id = etm4_cpu_id, + .trace_id = etm4_trace_id, + .enable = etm4_enable, + .disable = etm4_disable, }; -static const struct attribute_group *coresight_etmv4_groups[] = { - &coresight_etmv4_group, - &coresight_etmv4_mgmt_group, - &coresight_etmv4_trcidr_group, - NULL, +static const struct coresight_ops etm4_cs_ops = { + .source_ops = &etm4_source_ops, }; static void etm4_init_arch_data(void *info) @@ -2310,6 +408,9 @@ static void etm4_init_arch_data(void *info) u32 etmidr5; struct etmv4_drvdata *drvdata = info; + /* Make sure all registers are accessible */ + etm4_os_unlock(drvdata); + CS_UNLOCK(drvdata->base); /* find all capabilities of the tracing unit */ @@ -2461,93 +562,115 @@ static void etm4_init_arch_data(void *info) CS_LOCK(drvdata->base); } -static void etm4_init_default_data(struct etmv4_drvdata *drvdata) +static void etm4_set_default(struct etmv4_config *config) { - int i; + if (WARN_ON_ONCE(!config)) + return; - drvdata->pe_sel = 0x0; - drvdata->cfg = (ETMv4_MODE_CTXID | ETM_MODE_VMID | - ETMv4_MODE_TIMESTAMP | ETM_MODE_RETURNSTACK); + /* + * Make default initialisation trace everything + * + * Select the "always true" resource selector on the + * "Enablign Event" line and configure address range comparator + * '0' to trace all the possible address range. From there + * configure the "include/exclude" engine to include address + * range comparator '0'. + */ /* disable all events tracing */ - drvdata->eventctrl0 = 0x0; - drvdata->eventctrl1 = 0x0; + config->eventctrl0 = 0x0; + config->eventctrl1 = 0x0; /* disable stalling */ - drvdata->stall_ctrl = 0x0; + config->stall_ctrl = 0x0; + + /* enable trace synchronization every 4096 bytes, if available */ + config->syncfreq = 0xC; /* disable timestamp event */ - drvdata->ts_ctrl = 0x0; + config->ts_ctrl = 0x0; - /* enable trace synchronization every 4096 bytes for trace */ - if (drvdata->syncpr == false) - drvdata->syncfreq = 0xC; + /* TRCVICTLR::EVENT = 0x01, select the always on logic */ + config->vinst_ctrl |= BIT(0); /* - * enable viewInst to trace everything with start-stop logic in - * started state + * TRCVICTLR::SSSTATUS == 1, the start-stop logic is + * in the started state */ - drvdata->vinst_ctrl |= BIT(0); - /* set initial state of start-stop logic */ - if (drvdata->nr_addr_cmp) - drvdata->vinst_ctrl |= BIT(9); + config->vinst_ctrl |= BIT(9); - /* no address range filtering for ViewInst */ - drvdata->viiectlr = 0x0; - /* no start-stop filtering for ViewInst */ - drvdata->vissctlr = 0x0; + /* + * Configure address range comparator '0' to encompass all + * possible addresses. + */ - /* disable seq events */ - for (i = 0; i < drvdata->nrseqstate-1; i++) - drvdata->seq_ctrl[i] = 0x0; - drvdata->seq_rst = 0x0; - drvdata->seq_state = 0x0; + /* First half of default address comparator: start at address 0 */ + config->addr_val[ETM_DEFAULT_ADDR_COMP] = 0x0; + /* trace instruction addresses */ + config->addr_acc[ETM_DEFAULT_ADDR_COMP] &= ~(BIT(0) | BIT(1)); + /* EXLEVEL_NS, bits[12:15], only trace application and kernel space */ + config->addr_acc[ETM_DEFAULT_ADDR_COMP] |= ETM_EXLEVEL_NS_HYP; + /* EXLEVEL_S, bits[11:8], don't trace anything in secure state */ + config->addr_acc[ETM_DEFAULT_ADDR_COMP] |= (ETM_EXLEVEL_S_APP | + ETM_EXLEVEL_S_OS | + ETM_EXLEVEL_S_HYP); + config->addr_type[ETM_DEFAULT_ADDR_COMP] = ETM_ADDR_TYPE_RANGE; - /* disable external input events */ - drvdata->ext_inp = 0x0; + /* + * Second half of default address comparator: go all + * the way to the top. + */ + config->addr_val[ETM_DEFAULT_ADDR_COMP + 1] = ~0x0; + /* trace instruction addresses */ + config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] &= ~(BIT(0) | BIT(1)); + /* Address comparator type must be equal for both halves */ + config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] = + config->addr_acc[ETM_DEFAULT_ADDR_COMP]; + config->addr_type[ETM_DEFAULT_ADDR_COMP + 1] = ETM_ADDR_TYPE_RANGE; - for (i = 0; i < drvdata->nr_cntr; i++) { - drvdata->cntrldvr[i] = 0x0; - drvdata->cntr_ctrl[i] = 0x0; - drvdata->cntr_val[i] = 0x0; - } + /* + * Configure the ViewInst function to filter on address range + * comparator '0'. + */ + config->viiectlr = BIT(0); - /* Resource selector pair 0 is always implemented and reserved */ - drvdata->res_idx = 0x2; - for (i = 2; i < drvdata->nr_resource * 2; i++) - drvdata->res_ctrl[i] = 0x0; + /* no start-stop filtering for ViewInst */ + config->vissctlr = 0x0; +} - for (i = 0; i < drvdata->nr_ss_cmp; i++) { - drvdata->ss_ctrl[i] = 0x0; - drvdata->ss_pe_cmp[i] = 0x0; - } +void etm4_config_trace_mode(struct etmv4_config *config) +{ + u32 addr_acc, mode; - if (drvdata->nr_addr_cmp >= 1) { - drvdata->addr_val[0] = (unsigned long)_stext; - drvdata->addr_val[1] = (unsigned long)_etext; - drvdata->addr_type[0] = ETM_ADDR_TYPE_RANGE; - drvdata->addr_type[1] = ETM_ADDR_TYPE_RANGE; - } + mode = config->mode; + mode &= (ETM_MODE_EXCL_KERN | ETM_MODE_EXCL_USER); - for (i = 0; i < drvdata->numcidc; i++) { - drvdata->ctxid_pid[i] = 0x0; - drvdata->ctxid_vpid[i] = 0x0; - } + /* excluding kernel AND user space doesn't make sense */ + WARN_ON_ONCE(mode == (ETM_MODE_EXCL_KERN | ETM_MODE_EXCL_USER)); - drvdata->ctxid_mask0 = 0x0; - drvdata->ctxid_mask1 = 0x0; + /* nothing to do if neither flags are set */ + if (!(mode & ETM_MODE_EXCL_KERN) && !(mode & ETM_MODE_EXCL_USER)) + return; - for (i = 0; i < drvdata->numvmidc; i++) - drvdata->vmid_val[i] = 0x0; - drvdata->vmid_mask0 = 0x0; - drvdata->vmid_mask1 = 0x0; + addr_acc = config->addr_acc[ETM_DEFAULT_ADDR_COMP]; + /* clear default config */ + addr_acc &= ~(ETM_EXLEVEL_NS_APP | ETM_EXLEVEL_NS_OS); /* - * A trace ID value of 0 is invalid, so let's start at some - * random value that fits in 7 bits. ETMv3.x has 0x10 so let's - * start at 0x20. + * EXLEVEL_NS, bits[15:12] + * The Exception levels are: + * Bit[12] Exception level 0 - Application + * Bit[13] Exception level 1 - OS + * Bit[14] Exception level 2 - Hypervisor + * Bit[15] Never implemented */ - drvdata->trcid = 0x20 + drvdata->cpu; + if (mode & ETM_MODE_EXCL_KERN) + addr_acc |= ETM_EXLEVEL_NS_OS; + else + addr_acc |= ETM_EXLEVEL_NS_APP; + + config->addr_acc[ETM_DEFAULT_ADDR_COMP] = addr_acc; + config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] = addr_acc; } static int etm4_cpu_callback(struct notifier_block *nfb, unsigned long action, @@ -2566,7 +689,7 @@ static int etm4_cpu_callback(struct notifier_block *nfb, unsigned long action, etmdrvdata[cpu]->os_unlock = true; } - if (etmdrvdata[cpu]->enable) + if (local_read(&etmdrvdata[cpu]->mode)) etm4_enable_hw(etmdrvdata[cpu]); spin_unlock(&etmdrvdata[cpu]->spinlock); break; @@ -2579,7 +702,7 @@ static int etm4_cpu_callback(struct notifier_block *nfb, unsigned long action, case CPU_DYING: spin_lock(&etmdrvdata[cpu]->spinlock); - if (etmdrvdata[cpu]->enable) + if (local_read(&etmdrvdata[cpu]->mode)) etm4_disable_hw(etmdrvdata[cpu]); spin_unlock(&etmdrvdata[cpu]->spinlock); break; @@ -2592,6 +715,11 @@ static struct notifier_block etm4_cpu_notifier = { .notifier_call = etm4_cpu_callback, }; +static void etm4_init_trace_id(struct etmv4_drvdata *drvdata) +{ + drvdata->trcid = coresight_get_trace_id(drvdata->cpu); +} + static int etm4_probe(struct amba_device *adev, const struct amba_id *id) { int ret; @@ -2635,9 +763,6 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id) get_online_cpus(); etmdrvdata[drvdata->cpu] = drvdata; - if (!smp_call_function_single(drvdata->cpu, etm4_os_unlock, drvdata, 1)) - drvdata->os_unlock = true; - if (smp_call_function_single(drvdata->cpu, etm4_init_arch_data, drvdata, 1)) dev_err(dev, "ETM arch init failed\n"); @@ -2651,9 +776,9 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id) ret = -EINVAL; goto err_arch_supported; } - etm4_init_default_data(drvdata); - pm_runtime_put(&adev->dev); + etm4_init_trace_id(drvdata); + etm4_set_default(&drvdata->config); desc->type = CORESIGHT_DEV_TYPE_SOURCE; desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC; @@ -2664,9 +789,16 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id) drvdata->csdev = coresight_register(desc); if (IS_ERR(drvdata->csdev)) { ret = PTR_ERR(drvdata->csdev); - goto err_coresight_register; + goto err_arch_supported; + } + + ret = etm_perf_symlink(drvdata->csdev, true); + if (ret) { + coresight_unregister(drvdata->csdev); + goto err_arch_supported; } + pm_runtime_put(&adev->dev); dev_info(dev, "%s initialized\n", (char *)id->data); if (boot_enable) { @@ -2677,24 +809,11 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id) return 0; err_arch_supported: - pm_runtime_put(&adev->dev); -err_coresight_register: if (--etm4_count == 0) unregister_hotcpu_notifier(&etm4_cpu_notifier); return ret; } -static int etm4_remove(struct amba_device *adev) -{ - struct etmv4_drvdata *drvdata = amba_get_drvdata(adev); - - coresight_unregister(drvdata->csdev); - if (--etm4_count == 0) - unregister_hotcpu_notifier(&etm4_cpu_notifier); - - return 0; -} - static struct amba_id etm4_ids[] = { { /* ETM 4.0 - Qualcomm */ .id = 0x0003b95d, @@ -2706,16 +825,20 @@ static struct amba_id etm4_ids[] = { .mask = 0x000fffff, .data = "ETM 4.0", }, + { /* ETM 4.0 - A72, Maia, HiSilicon */ + .id = 0x000bb95a, + .mask = 0x000fffff, + .data = "ETM 4.0", + }, { 0, 0}, }; static struct amba_driver etm4x_driver = { .drv = { .name = "coresight-etm4x", + .suppress_bind_attrs = true, }, .probe = etm4_probe, - .remove = etm4_remove, .id_table = etm4_ids, }; - -module_amba_driver(etm4x_driver); +builtin_amba_driver(etm4x_driver); |