Re: [PATCH 1/8] coresight: etm4x: Fixes for ETM v4.4 architecture updates.

Hi Mike,

On Mon, Aug 19, 2019 at 09:57:13PM +0100, Mike Leach wrote:

ETMv4.4 adds in support for tracing secure EL2 (per arch 8.x updates).

What is the name of the ETMv4.4 document? I can only find up to 4.2 on line.

Patch accounts for this new capability.

Signed-off-by: Mike Leach mike.leach@linaro.org

.../hwtracing/coresight/coresight-etm4x-sysfs.c | 12 ++++++------ drivers/hwtracing/coresight/coresight-etm4x.c | 5 ++++- drivers/hwtracing/coresight/coresight-etm4x.h | 15 +++++++++++---- 3 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index 219c10eb752c..b6984be0c515 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -738,7 +738,7 @@ static ssize_t s_exlevel_vinst_show(struct device *dev, struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etmv4_config *config = &drvdata->config;

• val = BMVAL(config->vinst_ctrl, 16, 19);

• val = (config->vinst_ctrl & ETM_EXLEVEL_S_VICTLR_MASK) >> 16; return scnprintf(buf, PAGE_SIZE, "%#lx\n", val);

} @@ -754,8 +754,8 @@ static ssize_t s_exlevel_vinst_store(struct device *dev, return -EINVAL; spin_lock(&drvdata->spinlock);

• /* clear all EXLEVEL_S bits (bit[18] is never implemented) */
• config->vinst_ctrl &= ~(BIT(16) | BIT(17) | BIT(19));

• /* clear all EXLEVEL_S bits */
• config->vinst_ctrl &= ~(ETM_EXLEVEL_S_VICTLR_MASK); /* enable instruction tracing for corresponding exception level */ val &= drvdata->s_ex_level; config->vinst_ctrl |= (val << 16);

@@ -773,7 +773,7 @@ static ssize_t ns_exlevel_vinst_show(struct device *dev, struct etmv4_config *config = &drvdata->config; /* EXLEVEL_NS, bits[23:20] */

• val = BMVAL(config->vinst_ctrl, 20, 23);

• val = (config->vinst_ctrl & ETM_EXLEVEL_NS_VICTLR_MASK) >> 20; return scnprintf(buf, PAGE_SIZE, "%#lx\n", val);

} @@ -789,8 +789,8 @@ static ssize_t ns_exlevel_vinst_store(struct device *dev, return -EINVAL; spin_lock(&drvdata->spinlock);

• /* clear EXLEVEL_NS bits (bit[23] is never implemented */
• config->vinst_ctrl &= ~(BIT(20) | BIT(21) | BIT(22));

• /* clear EXLEVEL_NS bits */
• config->vinst_ctrl &= ~(ETM_EXLEVEL_NS_VICTLR_MASK); /* enable instruction tracing for corresponding exception level */ val &= drvdata->ns_ex_level; config->vinst_ctrl |= (val << 20);

diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index a128b5063f46..52b8876de157 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -629,6 +629,7 @@ static void etm4_init_arch_data(void *info) * TRCARCHMAJ, bits[11:8] architecture major versin number */ drvdata->arch = BMVAL(etmidr1, 4, 11);

• drvdata->config.arch = drvdata->arch;

/* maximum size of resources */ etmidr2 = readl_relaxed(drvdata->base + TRCIDR2); @@ -780,6 +781,7 @@ static u64 etm4_get_ns_access_type(struct etmv4_config *config) static u64 etm4_get_access_type(struct etmv4_config *config) { u64 access_type = etm4_get_ns_access_type(config);

• u64 s_hyp = (config->arch & 0x0f) >= 0x4 ? ETM_EXLEVEL_S_HYP : 0;

/* * EXLEVEL_S, bits[11:8], don't trace anything happening @@ -787,7 +789,8 @@ static u64 etm4_get_access_type(struct etmv4_config *config) */ access_type |= (ETM_EXLEVEL_S_APP | ETM_EXLEVEL_S_OS |

• 	ETM_EXLEVEL_S_HYP);
  

• 	s_hyp			|
  

• 	ETM_EXLEVEL_S_MON);
  

return access_type; } diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h index 4523f10ddd0f..60bc2fb5159b 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.h +++ b/drivers/hwtracing/coresight/coresight-etm4x.h @@ -180,17 +180,22 @@ /* PowerDown Control Register bits */ #define TRCPDCR_PU BIT(3) -/* secure state access levels */ +/* secure state access levels - TRCACATRn */ #define ETM_EXLEVEL_S_APP BIT(8) #define ETM_EXLEVEL_S_OS BIT(9) -#define ETM_EXLEVEL_S_NA BIT(10) -#define ETM_EXLEVEL_S_HYP BIT(11) -/* non-secure state access levels */ +#define ETM_EXLEVEL_S_HYP BIT(10) +#define ETM_EXLEVEL_S_MON BIT(11) +/* non-secure state access levels - TRCACATRn */ #define ETM_EXLEVEL_NS_APP BIT(12) #define ETM_EXLEVEL_NS_OS BIT(13) #define ETM_EXLEVEL_NS_HYP BIT(14) #define ETM_EXLEVEL_NS_NA BIT(15) +/* secure / non secure masks - TRCVICTLR, IDR3 */ +#define ETM_EXLEVEL_S_VICTLR_MASK GENMASK(19, 16) +/* NS MON (EL3) mode never implemented */ +#define ETM_EXLEVEL_NS_VICTLR_MASK GENMASK(22, 20)

It is hard to say without documentation but shouldn't this be GENMASK(23, 20)?

/**

• struct etmv4_config - configuration information related to an ETMv4
• @mode: Controls various modes supported by this ETM.

@@ -237,6 +242,7 @@

• @vmid_mask0: VM ID comparator mask for comparator 0-3.
• @vmid_mask1: VM ID comparator mask for comparator 4-7.
• @ext_inp: External input selection.

• • @arch: ETM architecture version (for arch dependent config).
  */

struct etmv4_config { u32 mode; @@ -279,6 +285,7 @@ struct etmv4_config { u32 vmid_mask0; u32 vmid_mask1; u32 ext_inp;

• u8 arch;

}; /** -- 2.17.1