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Subject[PATCH 7/7] intel-speed-select: Implement base-freq commands on CascadeLake-N
Date
Add functionality for base-freq info|enable|disable info on CascadeLake-N.

The enable command always returns success, and the disable command always
returns failed because SST-BF cannot be enabled or disabled from the OS on
CascadeLake-N.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
.../x86/intel-speed-select/isst-config.c | 56 ++++++++++++++-----
.../x86/intel-speed-select/isst-display.c | 6 +-
tools/power/x86/intel-speed-select/isst.h | 3 +-
3 files changed, 49 insertions(+), 16 deletions(-)

diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index 0c66012fc5a1..24e6084a36b4 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -940,6 +940,18 @@ static void set_tdp_level(int arg)
isst_ctdp_display_information_end(outf);
}

+static void cn_dump_pbf_config_for_cpu(int cpu, void *arg1, void *arg2,
+ void *arg3, void *arg4)
+{
+ struct isst_pbf_info *pbf_info;
+ struct isst_pkg_ctdp_level_info *ctdp_level;
+
+ ctdp_level = &cn_pkg_dev.ctdp_level[0];
+ pbf_info = &ctdp_level->pbf_info;
+
+ isst_pbf_display_information(cpu, outf, tdp_level, pbf_info, cpu_model);
+}
+
static void dump_pbf_config_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
void *arg4)
{
@@ -950,13 +962,16 @@ static void dump_pbf_config_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
if (ret) {
perror("isst_get_pbf_info");
} else {
- isst_pbf_display_information(cpu, outf, tdp_level, &pbf_info);
+ isst_pbf_display_information(cpu, outf, tdp_level, &pbf_info,
+ cpu_model);
isst_get_pbf_info_complete(&pbf_info);
}
}

static void dump_pbf_config(int arg)
{
+ void *fn;
+
if (cmd_help) {
fprintf(stderr,
"Print Intel(R) Speed Select Technology base frequency configuration for a TDP level\n");
@@ -970,13 +985,18 @@ static void dump_pbf_config(int arg)
exit(1);
}

+ if (cpu_model != 0x55)
+ fn = dump_pbf_config_for_cpu;
+ else
+ fn = cn_dump_pbf_config_for_cpu;
+
isst_ctdp_display_information_start(outf);
+
if (max_target_cpus)
- for_each_online_target_cpu_in_set(dump_pbf_config_for_cpu, NULL,
- NULL, NULL, NULL);
+ for_each_online_target_cpu_in_set(fn, NULL, NULL, NULL, NULL);
else
- for_each_online_package_in_set(dump_pbf_config_for_cpu, NULL,
- NULL, NULL, NULL);
+ for_each_online_package_in_set(fn, NULL, NULL, NULL, NULL);
+
isst_ctdp_display_information_end(outf);
}

@@ -986,17 +1006,24 @@ static void set_pbf_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
int ret;
int status = *(int *)arg4;

- ret = isst_set_pbf_fact_status(cpu, 1, status);
- if (ret) {
- perror("isst_set_pbf");
+ if (cpu_model != 0x55) {
+ ret = isst_set_pbf_fact_status(cpu, 1, status);
+ if (ret) {
+ perror("isst_set_pbf");
+ return;
+ }
+
} else {
- if (status)
- isst_display_result(cpu, outf, "base-freq", "enable",
- ret);
+ if (status == 0)
+ ret = -1;
else
- isst_display_result(cpu, outf, "base-freq", "disable",
- ret);
+ ret = 0;
}
+
+ if (status)
+ isst_display_result(cpu, outf, "base-freq", "enable", ret);
+ else
+ isst_display_result(cpu, outf, "base-freq", "disable", ret);
}

static void set_pbf_enable(int arg)
@@ -1388,6 +1415,9 @@ static void get_clos_assoc(int arg)

static struct process_cmd_struct cn_cmds[] = {
{ "perf-profile", "info", dump_isst_config, 0 },
+ { "base-freq", "info", dump_pbf_config, 0 },
+ { "base-freq", "enable", set_pbf_enable, 1 },
+ { "base-freq", "disable", set_pbf_enable, 0 },
{ NULL, NULL, NULL, 0 }
};

diff --git a/tools/power/x86/intel-speed-select/isst-display.c b/tools/power/x86/intel-speed-select/isst-display.c
index 7d91a5de1b85..8cc8d963a55e 100644
--- a/tools/power/x86/intel-speed-select/isst-display.c
+++ b/tools/power/x86/intel-speed-select/isst-display.c
@@ -474,10 +474,12 @@ void isst_ctdp_display_information_end(FILE *outf)
}

void isst_pbf_display_information(int cpu, FILE *outf, int level,
- struct isst_pbf_info *pbf_info)
+ struct isst_pbf_info *pbf_info,
+ int cpu_model)
{
print_package_info(cpu, outf);
- _isst_pbf_display_information(cpu, outf, level, pbf_info, 4, 0);
+ _isst_pbf_display_information(cpu, outf, level, pbf_info, 4,
+ cpu_model);
format_and_print(outf, 1, NULL, NULL);
}

diff --git a/tools/power/x86/intel-speed-select/isst.h b/tools/power/x86/intel-speed-select/isst.h
index 35b0fec44d35..d94b46272ce2 100644
--- a/tools/power/x86/intel-speed-select/isst.h
+++ b/tools/power/x86/intel-speed-select/isst.h
@@ -203,7 +203,8 @@ extern void isst_ctdp_display_core_info(int cpu, FILE *outf, char *prefix,
extern void isst_ctdp_display_information_start(FILE *outf);
extern void isst_ctdp_display_information_end(FILE *outf);
extern void isst_pbf_display_information(int cpu, FILE *outf, int level,
- struct isst_pbf_info *info);
+ struct isst_pbf_info *info,
+ int cpu_model);
extern int isst_set_tdp_level(int cpu, int tdp_level);
extern int isst_set_tdp_level_msr(int cpu, int tdp_level);
extern int isst_set_pbf_fact_status(int cpu, int pbf, int enable);
--
2.21.0
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