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tools/power/x86/intel-speed-select: Refuse to disable core-power when getting used

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The turbo-freq feature is dependent on the core-power feature. If the
core-power feature is disabled while the turbo-freq feature is enabled,
this will break the turbo-freq feature. This is a firmware limitation,
where they can't return error under this scenario.

So when trying to disable core-power, make sure that the turbo-freq
feature is not enabled. If it enabled, return error if user is trying to
disable the core-power feature.

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:
Srinivas Pandruvada 2019-10-10 13:29:39 -07:00 committed by Andy Shevchenko
parent a6a82f9bcd
commit 4e26fabfe1
1 changed files with 21 additions and 0 deletions
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21
tools/power/x86/intel-speed-select/isst-core.c
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@ -649,6 +649,27 @@ int isst_pm_qos_config(int cpu, int enable_clos, int priority_type)
unsigned int req, resp;
int ret;
if (!enable_clos) {
struct isst_pkg_ctdp pkg_dev;
struct isst_pkg_ctdp_level_info ctdp_level;
ret = isst_get_ctdp_levels(cpu, &pkg_dev);
if (ret) {
debug_printf("isst_get_ctdp_levels\n");
return ret;
}
ret = isst_get_ctdp_control(cpu, pkg_dev.current_level,
&ctdp_level);
if (ret)
return ret;
if (ctdp_level.fact_enabled) {
debug_printf("Turbo-freq feature must be disabled first\n");
return -EINVAL;
}
}
ret = isst_send_mbox_command(cpu, CONFIG_CLOS, CLOS_PM_QOS_CONFIG, 0, 0,
&resp);
if (ret)