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Commit 68a090e5 authored by Chunyan Zhang's avatar Chunyan Zhang Committed by Shashank Mittal
Browse files

coresight-etm4x: Change the name of the ctxid_val to ctxid_pid 



'ctxid_val' array was used to store the value of ETM context ID comparator
which actually stores the process ID to be traced, so using 'ctxid_pid' as
its name instead make it easier to understand.

This patch also changes the ABI, it is normally not allowed, but
fortunately it is a testing ABI and very new for now. Nevertheless,
if you don't think it should be changed, we could always add an alias
for userspace.

Change-Id: Ia410f21d6aece2b0e218dd305d2151f71bbfb842
Signed-off-by: default avatarChunyan Zhang <zhang.chunyan@linaro.org>
Reviewed-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: cd196ac3fa5a574f3ddf37b66fbe8c58225c3355
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: default avatarShashank Mittal <mittals@codeaurora.org>
parent 24873317

Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x

+1 −1
Original line number Diff line number Diff line
@@ -249,7 +249,7 @@ KernelVersion: 4.01 
Contact:	Mathieu Poirier <mathieu.poirier@linaro.org>

Description:	(RW) Select which context ID comparator to work with.



What:		/sys/bus/coresight/devices/<memory_map>.etm/ctxid_val

What:		/sys/bus/coresight/devices/<memory_map>.etm/ctxid_pid

Date:		April 2015

KernelVersion:	4.01

Contact:	Mathieu Poirier <mathieu.poirier@linaro.org>

drivers/hwtracing/coresight/coresight-etm4x.c

+10 −10
Original line number Diff line number Diff line
@@ -155,7 +155,7 @@ static void etm4_enable_hw(void *info) 
			       drvdata->base + TRCACATRn(i));

	}

	for (i = 0; i < drvdata->numcidc; i++)

		writeq_relaxed(drvdata->ctxid_val[i],

		writeq_relaxed(drvdata->ctxid_pid[i],

			       drvdata->base + TRCCIDCVRn(i));

	writel_relaxed(drvdata->ctxid_mask0, drvdata->base + TRCCIDCCTLR0);

	writel_relaxed(drvdata->ctxid_mask1, drvdata->base + TRCCIDCCTLR1);
@@ -507,7 +507,7 @@ static ssize_t reset_store(struct device *dev, 


	drvdata->ctxid_idx = 0x0;

	for (i = 0; i < drvdata->numcidc; i++)

		drvdata->ctxid_val[i] = 0x0;

		drvdata->ctxid_pid[i] = 0x0;

	drvdata->ctxid_mask0 = 0x0;

	drvdata->ctxid_mask1 = 0x0;
@@ -1815,7 +1815,7 @@ static ssize_t ctxid_idx_store(struct device *dev, 
}

static DEVICE_ATTR_RW(ctxid_idx);



static ssize_t ctxid_val_show(struct device *dev,

static ssize_t ctxid_pid_show(struct device *dev,

			      struct device_attribute *attr,

			      char *buf)

{
@@ -1825,12 +1825,12 @@ static ssize_t ctxid_val_show(struct device *dev, 


	spin_lock(&drvdata->spinlock);

	idx = drvdata->ctxid_idx;

	val = (unsigned long)drvdata->ctxid_val[idx];

	val = (unsigned long)drvdata->ctxid_pid[idx];

	spin_unlock(&drvdata->spinlock);

	return scnprintf(buf, PAGE_SIZE, "%#lx\n", val);

}



static ssize_t ctxid_val_store(struct device *dev,

static ssize_t ctxid_pid_store(struct device *dev,

			       struct device_attribute *attr,

			       const char *buf, size_t size)

{
@@ -1850,11 +1850,11 @@ static ssize_t ctxid_val_store(struct device *dev, 


	spin_lock(&drvdata->spinlock);

	idx = drvdata->ctxid_idx;

	drvdata->ctxid_val[idx] = (u64)val;

	drvdata->ctxid_pid[idx] = (u64)val;

	spin_unlock(&drvdata->spinlock);

	return size;

}

static DEVICE_ATTR_RW(ctxid_val);

static DEVICE_ATTR_RW(ctxid_pid);



static ssize_t ctxid_masks_show(struct device *dev,

				struct device_attribute *attr,
@@ -1949,7 +1949,7 @@ static ssize_t ctxid_masks_store(struct device *dev, 
		 */

		for (j = 0; j < 8; j++) {

			if (maskbyte & 1)

				drvdata->ctxid_val[i] &= ~(0xFF << (j * 8));

				drvdata->ctxid_pid[i] &= ~(0xFF << (j * 8));

			maskbyte >>= 1;

		}

		/* Select the next ctxid comparator mask value */
@@ -2193,7 +2193,7 @@ static struct attribute *coresight_etmv4_attrs[] = { 
	&dev_attr_res_idx.attr,

	&dev_attr_res_ctrl.attr,

	&dev_attr_ctxid_idx.attr,

	&dev_attr_ctxid_val.attr,

	&dev_attr_ctxid_pid.attr,

	&dev_attr_ctxid_masks.attr,

	&dev_attr_vmid_idx.attr,

	&dev_attr_vmid_val.attr,
@@ -2514,7 +2514,7 @@ static void etm4_init_default_data(struct etmv4_drvdata *drvdata) 
	}



	for (i = 0; i < drvdata->numcidc; i++)

		drvdata->ctxid_val[i] = 0x0;

		drvdata->ctxid_pid[i] = 0x0;

	drvdata->ctxid_mask0 = 0x0;

	drvdata->ctxid_mask1 = 0x0;

drivers/hwtracing/coresight/coresight-etm4x.h

+2 −2
Original line number Diff line number Diff line
@@ -265,7 +265,7 @@ 
 * @addr_type:	Current status of the comparator register.

 * @ctxid_idx:	Context ID index selector.

 * @ctxid_size:	Size of the context ID field to consider.

 * @ctxid_val:	Value of the context ID comparator.

 * @ctxid_pid:	Value of the context ID comparator.

 * @ctxid_mask0:Context ID comparator mask for comparator 0-3.

 * @ctxid_mask1:Context ID comparator mask for comparator 4-7.

 * @vmid_idx:	VM ID index selector.
@@ -352,7 +352,7 @@ struct etmv4_drvdata { 
	u8				addr_type[ETM_MAX_SINGLE_ADDR_CMP];

	u8				ctxid_idx;

	u8				ctxid_size;

	u64				ctxid_val[ETMv4_MAX_CTXID_CMP];

	u64				ctxid_pid[ETMv4_MAX_CTXID_CMP];

	u32				ctxid_mask0;

	u32				ctxid_mask1;

	u8				vmid_idx;