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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>
This commit is contained in:
Prarit Bhargava 2019-10-10 13:29:42 -07:00 committed by Andy Shevchenko
parent 210369dc73
commit 1c1d935c84
1 changed files with 41 additions and 2 deletions
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43
tools/power/x86/intel-speed-select/isst-config.c
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@ -23,6 +23,7 @@ static int debug_flag;
static FILE *outf;
static int cpu_model;
static int cpu_stepping;
#define MAX_CPUS_IN_ONE_REQ 64
static short max_target_cpus;
@ -72,7 +73,16 @@ void debug_printf(const char *format, ...)
va_end(args);
}
static void update_cpu_model(void)
int is_clx_n_platform(void)
{
if (cpu_model == 0x55)
if (cpu_stepping == 0x6 || cpu_stepping == 0x7)
return 1;
return 0;
}
static int update_cpu_model(void)
{
unsigned int ebx, ecx, edx;
unsigned int fms, family;
@ -82,6 +92,33 @@ static void update_cpu_model(void)
cpu_model = (fms >> 4) & 0xf;
if (family == 6 || family == 0xf)
cpu_model += ((fms >> 16) & 0xf) << 4;
cpu_stepping = fms & 0xf;
/* only three CascadeLake-N models are supported */
if (is_clx_n_platform()) {
FILE *fp;
size_t n = 0;
char *line = NULL;
int ret = 1;
fp = fopen("/proc/cpuinfo", "r");
if (!fp)
err(-1, "cannot open /proc/cpuinfo\n");
while (getline(&line, &n, fp) > 0) {
if (strstr(line, "model name")) {
if (strstr(line, "6252N") ||
strstr(line, "6230N") ||
strstr(line, "5218N"))
ret = 0;
break;
}
}
free(line);
fclose(fp);
return ret;
}
return 0;
}
/* Open a file, and exit on failure */
@ -1956,7 +1993,9 @@ static void cmdline(int argc, char **argv)
fprintf(stderr, "Feature name and|or command not specified\n");
exit(0);
}
update_cpu_model();
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();