diff options
author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2020-03-05 14:45:19 -0800 |
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committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-03-20 14:46:20 +0200 |
commit | f362cdccca07c2b90fc4fac9bf13d9ce975e9aa7 (patch) | |
tree | 95d42478b1f8acf0c8f363852bfd5ef88c8e7426 /tools/power | |
parent | fb186158283958984fecf7c1bbc0833dc76e375b (diff) | |
download | linux-f362cdccca07c2b90fc4fac9bf13d9ce975e9aa7.tar.bz2 |
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.c | 34 |
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(); |