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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2020-03-06 01:45:19 +0300
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-03-20 15:46:20 +0300
commitf362cdccca07c2b90fc4fac9bf13d9ce975e9aa7 (patch)
tree95d42478b1f8acf0c8f363852bfd5ef88c8e7426 /tools/power
parentfb186158283958984fecf7c1bbc0833dc76e375b (diff)
downloadlinux-f362cdccca07c2b90fc4fac9bf13d9ce975e9aa7.tar.xz
tools/power/x86/intel-speed-select: Helpful warning for missing kernel interface
When the device file "/dev/isst_interface" is not present, instead of failing on access, check at the start and print a helpful warning. Here CLX platform is an exception, which doesn't depend on the device file. So continue for CLX platform. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'tools/power')
-rw-r--r--tools/power/x86/intel-speed-select/isst-config.c34
1 files changed, 24 insertions, 10 deletions
diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index 4773970cda9b..9bf461e57a34 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -2408,6 +2408,8 @@ static void print_version(void)
static void cmdline(int argc, char **argv)
{
+ const char *pathname = "/dev/isst_interface";
+ FILE *fp;
int opt;
int option_index = 0;
int ret;
@@ -2423,6 +2425,28 @@ static void cmdline(int argc, char **argv)
{ 0, 0, 0, 0 }
};
+ if (geteuid() != 0) {
+ fprintf(stderr, "Must run as root\n");
+ exit(0);
+ }
+
+ ret = update_cpu_model();
+ if (ret)
+ err(-1, "Invalid CPU model (%d)\n", cpu_model);
+ printf("Intel(R) Speed Select Technology\n");
+ printf("Executing on CPU model:%d[0x%x]\n", cpu_model, cpu_model);
+
+ if (!is_clx_n_platform()) {
+ fp = fopen(pathname, "rb");
+ if (!fp) {
+ fprintf(stderr, "Intel speed select drivers are not loaded on this system.\n");
+ fprintf(stderr, "Verify that kernel config includes CONFIG_INTEL_SPEED_SELECT_INTERFACE.\n");
+ fprintf(stderr, "If the config is included then this is not a supported platform.\n");
+ exit(0);
+ }
+ fclose(fp);
+ }
+
progname = argv[0];
while ((opt = getopt_long_only(argc, argv, "+c:df:hio:v", long_options,
&option_index)) != -1) {
@@ -2457,20 +2481,10 @@ static void cmdline(int argc, char **argv)
}
}
- if (geteuid() != 0) {
- fprintf(stderr, "Must run as root\n");
- exit(0);
- }
-
if (optind > (argc - 2)) {
fprintf(stderr, "Feature name and|or command not specified\n");
exit(0);
}
- ret = update_cpu_model();
- if (ret)
- err(-1, "Invalid CPU model (%d)\n", cpu_model);
- printf("Intel(R) Speed Select Technology\n");
- printf("Executing on CPU model:%d[0x%x]\n", cpu_model, cpu_model);
set_max_cpu_num();
store_cpu_topology();
set_cpu_present_cpu_mask();