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authorThomas Renninger <trenn@suse.de>2020-01-17 10:55:54 +0300
committerShuah Khan <skhan@linuxfoundation.org>2020-01-18 01:21:42 +0300
commit41ddb7e1f79693d904502ae9bea609837973eff8 (patch)
tree561afd4c09a56f9d252c63f62439e00b594d18d2 /tools
parentb3a987b0264d3ddbb24293ebff10eddfc472f653 (diff)
downloadlinux-41ddb7e1f79693d904502ae9bea609837973eff8.tar.xz
cpupower: Revert library ABI changes from commit ae2917093fb60bdc1ed3e
Commit ae2917093fb6 ("tools/power/cpupower: Display boost frequency separately") modified the library function: struct cpufreq_available_frequencies *cpufreq_get_available_frequencies(unsigned int cpu) to struct cpufreq_frequencies *cpufreq_get_frequencies(const char *type, unsigned int cpu) This patch recovers the old API and implements the new functionality in a newly introduce method: struct cpufreq_boost_frequencies *cpufreq_get_available_frequencies(unsigned int cpu) This one should get merged into stable kernels back to 5.0 when the above had been introduced. Fixes: ae2917093fb6 ("tools/power/cpupower: Display boost frequency separately") Cc: stable@vger.kernel.org Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/power/cpupower/lib/cpufreq.c78
-rw-r--r--tools/power/cpupower/lib/cpufreq.h20
-rw-r--r--tools/power/cpupower/utils/cpufreq-info.c12
3 files changed, 87 insertions, 23 deletions
diff --git a/tools/power/cpupower/lib/cpufreq.c b/tools/power/cpupower/lib/cpufreq.c
index 2f55d4d23446..6e04304560ca 100644
--- a/tools/power/cpupower/lib/cpufreq.c
+++ b/tools/power/cpupower/lib/cpufreq.c
@@ -332,21 +332,74 @@ void cpufreq_put_available_governors(struct cpufreq_available_governors *any)
}
-struct cpufreq_frequencies
-*cpufreq_get_frequencies(const char *type, unsigned int cpu)
+struct cpufreq_available_frequencies
+*cpufreq_get_available_frequencies(unsigned int cpu)
{
- struct cpufreq_frequencies *first = NULL;
- struct cpufreq_frequencies *current = NULL;
+ struct cpufreq_available_frequencies *first = NULL;
+ struct cpufreq_available_frequencies *current = NULL;
char one_value[SYSFS_PATH_MAX];
char linebuf[MAX_LINE_LEN];
- char fname[MAX_LINE_LEN];
unsigned int pos, i;
unsigned int len;
- snprintf(fname, MAX_LINE_LEN, "scaling_%s_frequencies", type);
+ len = sysfs_cpufreq_read_file(cpu, "scaling_available_frequencies",
+ linebuf, sizeof(linebuf));
+ if (len == 0)
+ return NULL;
- len = sysfs_cpufreq_read_file(cpu, fname,
- linebuf, sizeof(linebuf));
+ pos = 0;
+ for (i = 0; i < len; i++) {
+ if (linebuf[i] == ' ' || linebuf[i] == '\n') {
+ if (i - pos < 2)
+ continue;
+ if (i - pos >= SYSFS_PATH_MAX)
+ goto error_out;
+ if (current) {
+ current->next = malloc(sizeof(*current));
+ if (!current->next)
+ goto error_out;
+ current = current->next;
+ } else {
+ first = malloc(sizeof(*first));
+ if (!first)
+ goto error_out;
+ current = first;
+ }
+ current->first = first;
+ current->next = NULL;
+
+ memcpy(one_value, linebuf + pos, i - pos);
+ one_value[i - pos] = '\0';
+ if (sscanf(one_value, "%lu", &current->frequency) != 1)
+ goto error_out;
+
+ pos = i + 1;
+ }
+ }
+
+ return first;
+
+ error_out:
+ while (first) {
+ current = first->next;
+ free(first);
+ first = current;
+ }
+ return NULL;
+}
+
+struct cpufreq_available_frequencies
+*cpufreq_get_boost_frequencies(unsigned int cpu)
+{
+ struct cpufreq_available_frequencies *first = NULL;
+ struct cpufreq_available_frequencies *current = NULL;
+ char one_value[SYSFS_PATH_MAX];
+ char linebuf[MAX_LINE_LEN];
+ unsigned int pos, i;
+ unsigned int len;
+
+ len = sysfs_cpufreq_read_file(cpu, "scaling_boost_frequencies",
+ linebuf, sizeof(linebuf));
if (len == 0)
return NULL;
@@ -391,9 +444,9 @@ struct cpufreq_frequencies
return NULL;
}
-void cpufreq_put_frequencies(struct cpufreq_frequencies *any)
+void cpufreq_put_available_frequencies(struct cpufreq_available_frequencies *any)
{
- struct cpufreq_frequencies *tmp, *next;
+ struct cpufreq_available_frequencies *tmp, *next;
if (!any)
return;
@@ -406,6 +459,11 @@ void cpufreq_put_frequencies(struct cpufreq_frequencies *any)
}
}
+void cpufreq_put_boost_frequencies(struct cpufreq_available_frequencies *any)
+{
+ cpufreq_put_available_frequencies(any);
+}
+
static struct cpufreq_affected_cpus *sysfs_get_cpu_list(unsigned int cpu,
const char *file)
{
diff --git a/tools/power/cpupower/lib/cpufreq.h b/tools/power/cpupower/lib/cpufreq.h
index a55f0d19215b..95f4fd9e2656 100644
--- a/tools/power/cpupower/lib/cpufreq.h
+++ b/tools/power/cpupower/lib/cpufreq.h
@@ -20,10 +20,10 @@ struct cpufreq_available_governors {
struct cpufreq_available_governors *first;
};
-struct cpufreq_frequencies {
+struct cpufreq_available_frequencies {
unsigned long frequency;
- struct cpufreq_frequencies *next;
- struct cpufreq_frequencies *first;
+ struct cpufreq_available_frequencies *next;
+ struct cpufreq_available_frequencies *first;
};
@@ -124,11 +124,17 @@ void cpufreq_put_available_governors(
* cpufreq_put_frequencies after use.
*/
-struct cpufreq_frequencies
-*cpufreq_get_frequencies(const char *type, unsigned int cpu);
+struct cpufreq_available_frequencies
+*cpufreq_get_available_frequencies(unsigned int cpu);
-void cpufreq_put_frequencies(
- struct cpufreq_frequencies *first);
+void cpufreq_put_available_frequencies(
+ struct cpufreq_available_frequencies *first);
+
+struct cpufreq_available_frequencies
+*cpufreq_get_boost_frequencies(unsigned int cpu);
+
+void cpufreq_put_boost_frequencies(
+ struct cpufreq_available_frequencies *first);
/* determine affected CPUs
diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c
index e63cf55f81cf..6efc0f6b1b11 100644
--- a/tools/power/cpupower/utils/cpufreq-info.c
+++ b/tools/power/cpupower/utils/cpufreq-info.c
@@ -244,14 +244,14 @@ static int get_boost_mode_x86(unsigned int cpu)
static int get_boost_mode(unsigned int cpu)
{
- struct cpufreq_frequencies *freqs;
+ struct cpufreq_available_frequencies *freqs;
if (cpupower_cpu_info.vendor == X86_VENDOR_AMD ||
cpupower_cpu_info.vendor == X86_VENDOR_HYGON ||
cpupower_cpu_info.vendor == X86_VENDOR_INTEL)
return get_boost_mode_x86(cpu);
- freqs = cpufreq_get_frequencies("boost", cpu);
+ freqs = cpufreq_get_boost_frequencies(cpu);
if (freqs) {
printf(_(" boost frequency steps: "));
while (freqs->next) {
@@ -261,7 +261,7 @@ static int get_boost_mode(unsigned int cpu)
}
print_speed(freqs->frequency);
printf("\n");
- cpufreq_put_frequencies(freqs);
+ cpufreq_put_available_frequencies(freqs);
}
return 0;
@@ -475,7 +475,7 @@ static int get_latency(unsigned int cpu, unsigned int human)
static void debug_output_one(unsigned int cpu)
{
- struct cpufreq_frequencies *freqs;
+ struct cpufreq_available_frequencies *freqs;
get_driver(cpu);
get_related_cpus(cpu);
@@ -483,7 +483,7 @@ static void debug_output_one(unsigned int cpu)
get_latency(cpu, 1);
get_hardware_limits(cpu, 1);
- freqs = cpufreq_get_frequencies("available", cpu);
+ freqs = cpufreq_get_available_frequencies(cpu);
if (freqs) {
printf(_(" available frequency steps: "));
while (freqs->next) {
@@ -493,7 +493,7 @@ static void debug_output_one(unsigned int cpu)
}
print_speed(freqs->frequency);
printf("\n");
- cpufreq_put_frequencies(freqs);
+ cpufreq_put_available_frequencies(freqs);
}
get_available_governors(cpu);