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Copy pathcoresight-etm4x-sysfs.c
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coresight-etm4x-sysfs.c
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright(C) 2015 Linaro Limited. All rights reserved.
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#include <linux/pid_namespace.h>
#include <linux/pm_runtime.h>
#include <linux/sysfs.h>
#include "coresight-etm4x.h"
#include "coresight-priv.h"
#include "coresight-syscfg.h"
static int etm4_set_mode_exclude(struct etmv4_drvdata *drvdata, bool exclude)
{
u8 idx;
struct etmv4_config *config = &drvdata->config;
idx = config->addr_idx;
/*
* TRCACATRn.TYPE bit[1:0]: type of comparison
* the trace unit performs
*/
if (BMVAL(config->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 (config->addr_type[idx] != ETM_ADDR_TYPE_RANGE ||
config->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
*/
config->viiectlr |= BIT(idx / 2 + 16);
config->viiectlr &= ~BIT(idx / 2);
} else {
/*
* Set include bit and unset exclude bit
* corresponding to comparator pair
*/
config->viiectlr |= BIT(idx / 2);
config->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)
{
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_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
if (val)
config->mode = 0x0;
/* Disable data tracing: do not trace load and store data transfers */
config->mode &= ~(ETM_MODE_LOAD | ETM_MODE_STORE);
config->cfg &= ~(BIT(1) | BIT(2));
/* Disable data value and data address tracing */
config->mode &= ~(ETM_MODE_DATA_TRACE_ADDR |
ETM_MODE_DATA_TRACE_VAL);
config->cfg &= ~(BIT(16) | BIT(17));
/* Disable all events tracing */
config->eventctrl0 = 0x0;
config->eventctrl1 = 0x0;
/* Disable timestamp event */
config->ts_ctrl = 0x0;
/* Disable stalling */
config->stall_ctrl = 0x0;
/* Reset trace synchronization period to 2^8 = 256 bytes*/
if (drvdata->syncpr == false)
config->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.
*/
config->vinst_ctrl = BIT(0);
if (drvdata->nr_addr_cmp > 0) {
config->mode |= ETM_MODE_VIEWINST_STARTSTOP;
/* SSSTATUS, bit[9] */
config->vinst_ctrl |= BIT(9);
}
/* No address range filtering for ViewInst */
config->viiectlr = 0x0;
/* No start-stop filtering for ViewInst */
config->vissctlr = 0x0;
config->vipcssctlr = 0x0;
/* Disable seq events */
for (i = 0; i < drvdata->nrseqstate-1; i++)
config->seq_ctrl[i] = 0x0;
config->seq_rst = 0x0;
config->seq_state = 0x0;
/* Disable external input events */
config->ext_inp = 0x0;
config->cntr_idx = 0x0;
for (i = 0; i < drvdata->nr_cntr; i++) {
config->cntrldvr[i] = 0x0;
config->cntr_ctrl[i] = 0x0;
config->cntr_val[i] = 0x0;
}
config->res_idx = 0x0;
for (i = 2; i < 2 * drvdata->nr_resource; i++)
config->res_ctrl[i] = 0x0;
config->ss_idx = 0x0;
for (i = 0; i < drvdata->nr_ss_cmp; i++) {
config->ss_ctrl[i] = 0x0;
config->ss_pe_cmp[i] = 0x0;
}
config->addr_idx = 0x0;
for (i = 0; i < drvdata->nr_addr_cmp * 2; i++) {
config->addr_val[i] = 0x0;
config->addr_acc[i] = 0x0;
config->addr_type[i] = ETM_ADDR_TYPE_NONE;
}
config->ctxid_idx = 0x0;
for (i = 0; i < drvdata->numcidc; i++)
config->ctxid_pid[i] = 0x0;
config->ctxid_mask0 = 0x0;
config->ctxid_mask1 = 0x0;
config->vmid_idx = 0x0;
for (i = 0; i < drvdata->numvmidc; i++)
config->vmid_val[i] = 0x0;
config->vmid_mask0 = 0x0;
config->vmid_mask1 = 0x0;
drvdata->trcid = drvdata->cpu + 1;
spin_unlock(&drvdata->spinlock);
cscfg_csdev_reset_feats(to_coresight_device(dev));
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);
struct etmv4_config *config = &drvdata->config;
val = config->mode;
return scnprintf(buf, PAGE_SIZE, "%#lx\n", val);
}
static ssize_t mode_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
unsigned long val, mode;
struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
config->mode = val & ETMv4_MODE_ALL;
if (drvdata->instrp0 == true) {
/* start by clearing instruction P0 field */
config->cfg &= ~(BIT(1) | BIT(2));
if (config->mode & ETM_MODE_LOAD)
/* 0b01 Trace load instructions as P0 instructions */
config->cfg |= BIT(1);
if (config->mode & ETM_MODE_STORE)
/* 0b10 Trace store instructions as P0 instructions */
config->cfg |= BIT(2);
if (config->mode & ETM_MODE_LOAD_STORE)
/*
* 0b11 Trace load and store instructions
* as P0 instructions
*/
config->cfg |= BIT(1) | BIT(2);
}
/* bit[3], Branch broadcast mode */
if ((config->mode & ETM_MODE_BB) && (drvdata->trcbb == true))
config->cfg |= BIT(3);
else
config->cfg &= ~BIT(3);
/* bit[4], Cycle counting instruction trace bit */
if ((config->mode & ETMv4_MODE_CYCACC) &&
(drvdata->trccci == true))
config->cfg |= BIT(4);
else
config->cfg &= ~BIT(4);
/* bit[6], Context ID tracing bit */
if ((config->mode & ETMv4_MODE_CTXID) && (drvdata->ctxid_size))
config->cfg |= BIT(6);
else
config->cfg &= ~BIT(6);
if ((config->mode & ETM_MODE_VMID) && (drvdata->vmid_size))
config->cfg |= BIT(7);
else
config->cfg &= ~BIT(7);
/* bits[10:8], Conditional instruction tracing bit */
mode = ETM_MODE_COND(config->mode);
if (drvdata->trccond == true) {
config->cfg &= ~(BIT(8) | BIT(9) | BIT(10));
config->cfg |= mode << 8;
}
/* bit[11], Global timestamp tracing bit */
if ((config->mode & ETMv4_MODE_TIMESTAMP) && (drvdata->ts_size))
config->cfg |= BIT(11);
else
config->cfg &= ~BIT(11);
/* bit[12], Return stack enable bit */
if ((config->mode & ETM_MODE_RETURNSTACK) &&
(drvdata->retstack == true))
config->cfg |= BIT(12);
else
config->cfg &= ~BIT(12);
/* bits[14:13], Q element enable field */
mode = ETM_MODE_QELEM(config->mode);
/* start by clearing QE bits */
config->cfg &= ~(BIT(13) | BIT(14));
/*
* if supported, Q elements with instruction counts are enabled.
* Always set the low bit for any requested mode. Valid combos are
* 0b00, 0b01 and 0b11.
*/
if (mode && drvdata->q_support)
config->cfg |= BIT(13);
/*
* if supported, Q elements with and without instruction
* counts are enabled
*/
if ((mode & BIT(1)) && (drvdata->q_support & BIT(1)))
config->cfg |= BIT(14);
/* bit[11], AMBA Trace Bus (ATB) trigger enable bit */
if ((config->mode & ETM_MODE_ATB_TRIGGER) &&
(drvdata->atbtrig == true))
config->eventctrl1 |= BIT(11);
else
config->eventctrl1 &= ~BIT(11);
/* bit[12], Low-power state behavior override bit */
if ((config->mode & ETM_MODE_LPOVERRIDE) &&
(drvdata->lpoverride == true))
config->eventctrl1 |= BIT(12);
else
config->eventctrl1 &= ~BIT(12);
/* bit[8], Instruction stall bit */
if ((config->mode & ETM_MODE_ISTALL_EN) && (drvdata->stallctl == true))
config->stall_ctrl |= BIT(8);
else
config->stall_ctrl &= ~BIT(8);
/* bit[10], Prioritize instruction trace bit */
if (config->mode & ETM_MODE_INSTPRIO)
config->stall_ctrl |= BIT(10);
else
config->stall_ctrl &= ~BIT(10);
/* bit[13], Trace overflow prevention bit */
if ((config->mode & ETM_MODE_NOOVERFLOW) &&
(drvdata->nooverflow == true))
config->stall_ctrl |= BIT(13);
else
config->stall_ctrl &= ~BIT(13);
/* bit[9] Start/stop logic control bit */
if (config->mode & ETM_MODE_VIEWINST_STARTSTOP)
config->vinst_ctrl |= BIT(9);
else
config->vinst_ctrl &= ~BIT(9);
/* bit[10], Whether a trace unit must trace a Reset exception */
if (config->mode & ETM_MODE_TRACE_RESET)
config->vinst_ctrl |= BIT(10);
else
config->vinst_ctrl &= ~BIT(10);
/* bit[11], Whether a trace unit must trace a system error exception */
if ((config->mode & ETM_MODE_TRACE_ERR) &&
(drvdata->trc_error == true))
config->vinst_ctrl |= BIT(11);
else
config->vinst_ctrl &= ~BIT(11);
if (config->mode & (ETM_MODE_EXCL_KERN | ETM_MODE_EXCL_USER))
etm4_config_trace_mode(config);
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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
if (val > drvdata->nr_pe) {
spin_unlock(&drvdata->spinlock);
return -EINVAL;
}
config->pe_sel = val;
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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
switch (drvdata->nr_event) {
case 0x0:
/* EVENT0, bits[7:0] */
config->eventctrl0 = val & 0xFF;
break;
case 0x1:
/* EVENT1, bits[15:8] */
config->eventctrl0 = val & 0xFFFF;
break;
case 0x2:
/* EVENT2, bits[23:16] */
config->eventctrl0 = val & 0xFFFFFF;
break;
case 0x3:
/* EVENT3, bits[31:24] */
config->eventctrl0 = val;
break;
default:
break;
}
spin_unlock(&drvdata->spinlock);
return size;
}
static DEVICE_ATTR_RW(event);
static ssize_t event_instren_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
unsigned long val;
struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
struct etmv4_config *config = &drvdata->config;
val = BMVAL(config->eventctrl1, 0, 3);
return scnprintf(buf, PAGE_SIZE, "%#lx\n", val);
}
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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
/* start by clearing all instruction event enable bits */
config->eventctrl1 &= ~(BIT(0) | BIT(1) | BIT(2) | BIT(3));
switch (drvdata->nr_event) {
case 0x0:
/* generate Event element for event 1 */
config->eventctrl1 |= val & BIT(1);
break;
case 0x1:
/* generate Event element for event 1 and 2 */
config->eventctrl1 |= val & (BIT(0) | BIT(1));
break;
case 0x2:
/* generate Event element for event 1, 2 and 3 */
config->eventctrl1 |= val & (BIT(0) | BIT(1) | BIT(2));
break;
case 0x3:
/* generate Event element for all 4 events */
config->eventctrl1 |= val & 0xF;
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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
if (!drvdata->ts_size)
return -EINVAL;
config->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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
if (drvdata->syncpr == true)
return -EINVAL;
config->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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
/* mask off max threshold before checking min value */
val &= ETM_CYC_THRESHOLD_MASK;
if (val < drvdata->ccitmin)
return -EINVAL;
config->ccctlr = val;
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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
if (drvdata->trcbb == false)
return -EINVAL;
if (!drvdata->nr_addr_cmp)
return -EINVAL;
/*
* Bit[8] controls include(1) / exclude(0), bits[0-7] select
* individual range comparators. If include then at least 1
* range must be selected.
*/
if ((val & BIT(8)) && (BMVAL(val, 0, 7) == 0))
return -EINVAL;
config->bb_ctrl = val & GENMASK(8, 0);
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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
val &= ETMv4_EVENT_MASK;
config->vinst_ctrl &= ~ETMv4_EVENT_MASK;
config->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);
struct etmv4_config *config = &drvdata->config;
val = (config->vinst_ctrl & TRCVICTLR_EXLEVEL_S_MASK) >> TRCVICTLR_EXLEVEL_S_SHIFT;
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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
/* clear all EXLEVEL_S bits */
config->vinst_ctrl &= ~(TRCVICTLR_EXLEVEL_S_MASK);
/* enable instruction tracing for corresponding exception level */
val &= drvdata->s_ex_level;
config->vinst_ctrl |= (val << TRCVICTLR_EXLEVEL_S_SHIFT);
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);
struct etmv4_config *config = &drvdata->config;
/* EXLEVEL_NS, bits[23:20] */
val = (config->vinst_ctrl & TRCVICTLR_EXLEVEL_NS_MASK) >> TRCVICTLR_EXLEVEL_NS_SHIFT;
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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
spin_lock(&drvdata->spinlock);
/* clear EXLEVEL_NS bits */
config->vinst_ctrl &= ~(TRCVICTLR_EXLEVEL_NS_MASK);
/* enable instruction tracing for corresponding exception level */
val &= drvdata->ns_ex_level;
config->vinst_ctrl |= (val << TRCVICTLR_EXLEVEL_NS_SHIFT);
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);
struct etmv4_config *config = &drvdata->config;
val = config->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);
struct etmv4_config *config = &drvdata->config;
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);
config->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);
struct etmv4_config *config = &drvdata->config;
spin_lock(&drvdata->spinlock);
idx = config->addr_idx;
val = BMVAL(config->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);
struct etmv4_config *config = &drvdata->config;
if (strlen(buf) >= 20)
return -EINVAL;
if (sscanf(buf, "%s", str) != 1)
return -EINVAL;
spin_lock(&drvdata->spinlock);
idx = config->addr_idx;
if (!strcmp(str, "instr"))
/* TYPE, bits[1:0] */
config->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);
struct etmv4_config *config = &drvdata->config;
idx = config->addr_idx;
spin_lock(&drvdata->spinlock);
if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
config->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
spin_unlock(&drvdata->spinlock);
return -EPERM;
}
val = (unsigned long)config->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);
struct etmv4_config *config = &drvdata->config;
if (kstrtoul(buf, 16, &val))
return -EINVAL;
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);
return -EPERM;
}
config->addr_val[idx] = (u64)val;
config->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);
struct etmv4_config *config = &drvdata->config;
spin_lock(&drvdata->spinlock);
idx = config->addr_idx;
if (idx % 2 != 0) {
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);
return -EPERM;
}
val1 = (unsigned long)config->addr_val[idx];
val2 = (unsigned long)config->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);
struct etmv4_config *config = &drvdata->config;
int elements, exclude;
elements = sscanf(buf, "%lx %lx %x", &val1, &val2, &exclude);
/* exclude is optional, but need at least two parameter */
if (elements < 2)
return -EINVAL;
/* lower address comparator cannot have a higher address value */
if (val1 > val2)
return -EINVAL;
spin_lock(&drvdata->spinlock);
idx = config->addr_idx;
if (idx % 2 != 0) {
spin_unlock(&drvdata->spinlock);
return -EPERM;
}
if (!((config->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
config->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||