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tools/power/x86/intel-speed-select: Add check for CascadeLake-N models
Three CascadeLake-N models (6252N, 6230N, and 5218N) have SST-PBF support. Return an error if the CascadeLake processor is not one of these specific models. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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210369dc73
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1c1d935c84
1 changed files with 41 additions and 2 deletions
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@ -23,6 +23,7 @@ static int debug_flag;
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static FILE *outf;
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static int cpu_model;
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static int cpu_stepping;
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#define MAX_CPUS_IN_ONE_REQ 64
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static short max_target_cpus;
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@ -72,7 +73,16 @@ void debug_printf(const char *format, ...)
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va_end(args);
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}
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static void update_cpu_model(void)
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int is_clx_n_platform(void)
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{
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if (cpu_model == 0x55)
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if (cpu_stepping == 0x6 || cpu_stepping == 0x7)
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return 1;
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return 0;
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}
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static int update_cpu_model(void)
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{
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unsigned int ebx, ecx, edx;
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unsigned int fms, family;
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@ -82,6 +92,33 @@ static void update_cpu_model(void)
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cpu_model = (fms >> 4) & 0xf;
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if (family == 6 || family == 0xf)
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cpu_model += ((fms >> 16) & 0xf) << 4;
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cpu_stepping = fms & 0xf;
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/* only three CascadeLake-N models are supported */
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if (is_clx_n_platform()) {
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FILE *fp;
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size_t n = 0;
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char *line = NULL;
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int ret = 1;
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fp = fopen("/proc/cpuinfo", "r");
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if (!fp)
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err(-1, "cannot open /proc/cpuinfo\n");
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while (getline(&line, &n, fp) > 0) {
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if (strstr(line, "model name")) {
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if (strstr(line, "6252N") ||
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strstr(line, "6230N") ||
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strstr(line, "5218N"))
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ret = 0;
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break;
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}
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}
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free(line);
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fclose(fp);
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return ret;
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}
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return 0;
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}
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/* Open a file, and exit on failure */
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@ -1956,7 +1993,9 @@ static void cmdline(int argc, char **argv)
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fprintf(stderr, "Feature name and|or command not specified\n");
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exit(0);
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}
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update_cpu_model();
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ret = update_cpu_model();
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if (ret)
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err(-1, "Invalid CPU model (%d)\n", cpu_model);
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printf("Intel(R) Speed Select Technology\n");
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printf("Executing on CPU model:%d[0x%x]\n", cpu_model, cpu_model);
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set_max_cpu_num();
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