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Commit d34171e8 authored by Sukadev Bhattiprolu's avatar Sukadev Bhattiprolu Committed by Michael Ellerman
Browse files

powerpc/perf/hv-24x7: Display domain indices in sysfs 



To help users determine domains, display the domain indices used by the
kernel in sysfs.

	$ cat /sys/bus/event_source/devices/hv_24x7/interface/domains
	1: Physical Chip
	2: Physical Core
	3: VCPU Home Core
	4: VCPU Home Chip
	5: VCPU Home Node
	6: VCPU Remote Node

Signed-off-by: default avatarSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 2b206ee6

arch/powerpc/perf/hv-24x7.c

+41 −0
Original line number Original line Diff line number Diff line
@@ -68,6 +68,24 @@ static bool is_physical_domain(unsigned domain) 
	}

	}

}

}





static const char *domain_name(unsigned domain)

{

	if (!domain_is_valid(domain))

		return NULL;



	switch (domain) {

	case HV_PERF_DOMAIN_PHYS_CHIP:		return "Physical Chip";

	case HV_PERF_DOMAIN_PHYS_CORE:		return "Physical Core";

	case HV_PERF_DOMAIN_VCPU_HOME_CORE:	return "VCPU Home Core";

	case HV_PERF_DOMAIN_VCPU_HOME_CHIP:	return "VCPU Home Chip";

	case HV_PERF_DOMAIN_VCPU_HOME_NODE:	return "VCPU Home Node";

	case HV_PERF_DOMAIN_VCPU_REMOTE_NODE:	return "VCPU Remote Node";

	}



	WARN_ON_ONCE(domain);

	return NULL;

}



static bool catalog_entry_domain_is_valid(unsigned domain)

static bool catalog_entry_domain_is_valid(unsigned domain)

{

{

	return is_physical_domain(domain);

	return is_physical_domain(domain);
@@ -969,6 +987,27 @@ static ssize_t catalog_read(struct file *filp, struct kobject *kobj, 
	return ret;

	return ret;

}

}





static ssize_t domains_show(struct device *dev, struct device_attribute *attr,

			    char *page)

{

	int d, n, count = 0;

	const char *str;



	for (d = 0; d < HV_PERF_DOMAIN_MAX; d++) {

		str = domain_name(d);

		if (!str)

			continue;



		n = sprintf(page, "%d: %s\n", d, str);

		if (n < 0)

			break;



		count += n;

		page += n;

	}

	return count;

}



#define PAGE_0_ATTR(_name, _fmt, _expr)				\

#define PAGE_0_ATTR(_name, _fmt, _expr)				\

static ssize_t _name##_show(struct device *dev,			\

static ssize_t _name##_show(struct device *dev,			\

			    struct device_attribute *dev_attr,	\

			    struct device_attribute *dev_attr,	\
@@ -997,6 +1036,7 @@ PAGE_0_ATTR(catalog_version, "%lld\n", 
PAGE_0_ATTR(catalog_len, "%lld\n",

PAGE_0_ATTR(catalog_len, "%lld\n",

		(unsigned long long)be32_to_cpu(page_0->length) * 4096);

		(unsigned long long)be32_to_cpu(page_0->length) * 4096);

static BIN_ATTR_RO(catalog, 0/* real length varies */);

static BIN_ATTR_RO(catalog, 0/* real length varies */);

static DEVICE_ATTR_RO(domains);





static struct bin_attribute *if_bin_attrs[] = {

static struct bin_attribute *if_bin_attrs[] = {

	&bin_attr_catalog,

	&bin_attr_catalog,
@@ -1006,6 +1046,7 @@ static struct bin_attribute *if_bin_attrs[] = { 
static struct attribute *if_attrs[] = {

static struct attribute *if_attrs[] = {

	&dev_attr_catalog_len.attr,

	&dev_attr_catalog_len.attr,

	&dev_attr_catalog_version.attr,

	&dev_attr_catalog_version.attr,

	&dev_attr_domains.attr,

	NULL,

	NULL,

};

};

arch/powerpc/perf/hv-24x7.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -7,6 +7,7 @@ enum hv_perf_domains { 
#define DOMAIN(n, v, x, c) HV_PERF_DOMAIN_##n = v,

#define DOMAIN(n, v, x, c) HV_PERF_DOMAIN_##n = v,

#include "hv-24x7-domains.h"

#include "hv-24x7-domains.h"

#undef DOMAIN

#undef DOMAIN

	HV_PERF_DOMAIN_MAX,

};

};





struct hv_24x7_request {

struct hv_24x7_request {