From 1c1d935c8418a63d110b2b31c57ba3d75f94f49d Mon Sep 17 00:00:00 2001 From: Prarit Bhargava Date: Thu, 10 Oct 2019 13:29:42 -0700 Subject: 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 Signed-off-by: Srinivas Pandruvada Signed-off-by: Andy Shevchenko --- tools/power/x86/intel-speed-select/isst-config.c | 43 ++++++++++++++++++++++-- 1 file changed, 41 insertions(+), 2 deletions(-) (limited to 'tools/power') diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c index 907b79e16c68..67a866e2dac4 100644 --- a/tools/power/x86/intel-speed-select/isst-config.c +++ b/tools/power/x86/intel-speed-select/isst-config.c @@ -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(); -- cgit