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-rw-r--r--tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c142
1 files changed, 104 insertions, 38 deletions
diff --git a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
index 1f330c82d7c1..83e5adbcda69 100644
--- a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
+++ b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
@@ -104,9 +104,14 @@ char platform_profile[64];
#define PATH_SOC_SLIDER_BALANCE "/sys/module/processor_thermal_soc_slider/parameters/slider_balance"
#define PATH_SOC_SLIDER_OFFSET "/sys/module/processor_thermal_soc_slider/parameters/slider_offset"
#define PATH_PLATFORM_PROFILE "/sys/class/platform-profile/platform-profile-0/profile"
+#define PATH_PLATFORM_PROFILE_NAME "/sys/class/platform-profile/platform-profile-0/name"
+#define POWER_SLIDER_NAME "SoC Power Slider"
static int use_android_msr_path;
+static unsigned int read_sysfs(const char *, char *, size_t);
+static int sysfs_read_string(const char *, char *, size_t);
+
/*
* maintain compatibility with original implementation, but don't document it:
*/
@@ -551,39 +556,91 @@ void print_version(void)
printf("x86_energy_perf_policy 2025.11.22 Len Brown <lenb@kernel.org>\n");
}
+static int platform_profile_access(int mode)
+{
+ if (access(PATH_PLATFORM_PROFILE, mode)) {
+ if (debug)
+ fprintf(stderr, "Can not access %s\n", PATH_PLATFORM_PROFILE);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int platform_profile_name_is(char *name)
+{
+ char buf[64];
+
+ if (sysfs_read_string(PATH_PLATFORM_PROFILE_NAME, buf, sizeof(buf)) != 0) {
+ if (debug)
+ fprintf(stderr, "Can not read %s\n", PATH_PLATFORM_PROFILE_NAME);
+ return 0;
+ }
+
+ if (strncmp(buf, name, 16)) {
+ if (debug)
+ fprintf(stderr, "%s does not match '%s'\n", PATH_PLATFORM_PROFILE_NAME, name);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int soc_slider_access(int mode)
+{
+ if (!platform_profile_access(R_OK))
+ return 0;
+
+ if (!platform_profile_name_is(POWER_SLIDER_NAME))
+ return 0;
+
+ if (access(PATH_SOC_SLIDER_BALANCE, mode)) {
+ if (debug)
+ fprintf(stderr, "Can not access %s\n", PATH_SOC_SLIDER_BALANCE);
+ return 0;
+ }
+
+ if (access(PATH_SOC_SLIDER_OFFSET, mode)) {
+ if (debug)
+ fprintf(stderr, "Can not access %s\n", PATH_SOC_SLIDER_OFFSET);
+ return 0;
+ }
+
+ return 1;
+}
+
void cmdline(int argc, char **argv)
{
int opt;
int option_index = 0;
static struct option long_options[] = {
- {"all", required_argument, 0, 'a'},
- {"cpu", required_argument, 0, 'c'},
- {"pkg", required_argument, 0, 'p'},
- {"debug", no_argument, 0, 'd'},
- {"hwp-desired", required_argument, 0, 'D'},
- {"epb", required_argument, 0, 'B'},
- {"force", no_argument, 0, 'f'},
- {"hwp-enable", no_argument, 0, 'e'},
- {"help", no_argument, 0, 'h'},
- {"hwp-epp", required_argument, 0, 'P'},
- {"hwp-min", required_argument, 0, 'm'},
- {"hwp-max", required_argument, 0, 'M'},
- {"read", no_argument, 0, 'r'},
- {"turbo-enable", required_argument, 0, 't'},
- {"hwp-use-pkg", required_argument, 0, 'u'},
- {"version", no_argument, 0, 'v'},
- {"hwp-window", required_argument, 0, 'w'},
- {"soc-slider-balance", required_argument, 0, 'S'},
- {"soc-slider-offset", required_argument, 0, 'O'},
- {"platform-profile", required_argument, 0, 'F'},
- {0, 0, 0, 0 }
+ { "all", required_argument, 0, 'a' },
+ { "cpu", required_argument, 0, 'c' },
+ { "pkg", required_argument, 0, 'p' },
+ { "debug", no_argument, 0, 'd' },
+ { "hwp-desired", required_argument, 0, 'D' },
+ { "epb", required_argument, 0, 'B' },
+ { "force", no_argument, 0, 'f' },
+ { "hwp-enable", no_argument, 0, 'e' },
+ { "help", no_argument, 0, 'h' },
+ { "hwp-epp", required_argument, 0, 'P' },
+ { "hwp-min", required_argument, 0, 'm' },
+ { "hwp-max", required_argument, 0, 'M' },
+ { "read", no_argument, 0, 'r' },
+ { "turbo-enable", required_argument, 0, 't' },
+ { "hwp-use-pkg", required_argument, 0, 'u' },
+ { "version", no_argument, 0, 'v' },
+ { "hwp-window", required_argument, 0, 'w' },
+ { "soc-slider-balance", required_argument, 0, 'S' },
+ { "soc-slider-offset", required_argument, 0, 'O' },
+ { "platform-profile", required_argument, 0, 'F' },
+ { 0, 0, 0, 0 }
};
progname = argv[0];
- while ((opt = getopt_long_only(argc, argv, "+a:c:dD:E:e:f:m:M:rt:u:vw::S:O:F:",
- long_options, &option_index)) != -1) {
+ while ((opt = getopt_long_only(argc, argv, "+a:c:dD:E:e:f:m:M:rt:u:vw::S:O:F:", long_options, &option_index)) != -1) {
switch (opt) {
case 'a':
parse_cmdline_all(optarg);
@@ -613,6 +670,8 @@ void cmdline(int argc, char **argv)
case 'F':
if (strlen(optarg) >= sizeof(platform_profile))
errx(1, "--platform-profile: value too long");
+ if (!platform_profile_access(W_OK))
+ errx(1, "Can not update platform-profile in '%s'", PATH_PLATFORM_PROFILE);
strcpy(platform_profile, optarg);
update_platform_profile = 1;
break;
@@ -625,6 +684,8 @@ void cmdline(int argc, char **argv)
case 'O':
if (parse_cmdline_int(optarg, &soc_slider_offset))
errx(1, "--soc-slider-offset: invalid value");
+ if (!soc_slider_access(W_OK))
+ errx(1, "Unable to write SOC Slider Offset");
update_soc_slider_offset = 1;
break;
case 'p':
@@ -639,6 +700,8 @@ void cmdline(int argc, char **argv)
case 'S':
if (parse_cmdline_int(optarg, &soc_slider_balance))
errx(1, "--soc-slider-balance: invalid value");
+ if (!soc_slider_access(W_OK))
+ errx(1, "Unable to write SOC Slider-Balance in '%s'", PATH_SOC_SLIDER_BALANCE);
update_soc_slider_balance = 1;
break;
case 't':
@@ -814,7 +877,8 @@ static unsigned int write_sysfs(const char *path, char *buf, size_t buflen)
numwritten = write(fd, buf, buflen - 1);
if (numwritten < 1) {
- perror("write failed\n");
+ buf[strcspn(buf, "\n")] = '\0';
+ warn("Write '%s' to '%s' failed", buf, path);
close(fd);
return -1;
}
@@ -972,27 +1036,30 @@ static int set_epb_sysfs(int cpu, int val)
return (int)val;
}
-static int soc_slider_available(void)
-{
- if (access(PATH_SOC_SLIDER_BALANCE, R_OK) &&
- access(PATH_SOC_SLIDER_OFFSET, R_OK) &&
- access(PATH_PLATFORM_PROFILE, R_OK))
- return 0;
-
- return 1;
-}
-
static void print_soc_slider(void)
{
char buf[64];
- if (!soc_slider_available())
+ if (!soc_slider_access(R_OK))
return;
if (sysfs_read_string(PATH_SOC_SLIDER_BALANCE, buf, sizeof(buf)) == 0)
printf("soc-slider-balance: %s\n", buf);
+
if (sysfs_read_string(PATH_SOC_SLIDER_OFFSET, buf, sizeof(buf)) == 0)
printf("soc-slider-offset: %s\n", buf);
+}
+
+static void print_platform_profile(void)
+{
+ char buf[64];
+
+ if (!platform_profile_access(R_OK))
+ return;
+
+ if (sysfs_read_string(PATH_PLATFORM_PROFILE_NAME, buf, sizeof(buf)) == 0)
+ printf("platform-profile-name: %s\n", buf);
+
if (sysfs_read_string(PATH_PLATFORM_PROFILE, buf, sizeof(buf)) == 0)
printf("platform-profile: %s\n", buf);
}
@@ -1725,13 +1792,12 @@ int main(int argc, char **argv)
return -EINVAL;
/* display information only, no updates to settings */
- if (!update_epb && !update_turbo && !hwp_update_enabled() &&
- !update_soc_slider_balance && !update_soc_slider_offset &&
- !update_platform_profile) {
+ if (!update_epb && !update_turbo && !hwp_update_enabled() && !update_soc_slider_balance && !update_soc_slider_offset && !update_platform_profile) {
if (cpu_selected_set)
for_all_cpus_in_set(cpu_setsize, cpu_selected_set, print_cpu_msrs);
print_soc_slider();
+ print_platform_profile();
if (has_hwp_request_pkg) {
if (pkg_selected_set == 0)
generated by cgit v1.2.3 (git 2.39.0) at 2026-05-13 18:00:58 +0300