soc/intel/cannonlake: Add devicetree setting to disable turbo

Introduce a new flag to disable turbo called 'cpu_turbo_disable'.
Keep the default and enable turbo on all platforms.

Change-Id: Ia23ce4d589b5ecc5515474eea52a40788ae3d3b5
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50797
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
This commit is contained in:
Patrick Rudolph 2021-02-16 11:52:38 +01:00 committed by Patrick Georgi
parent e0c2c06ba1
commit e9b0830422
2 changed files with 9 additions and 2 deletions

View File

@ -439,6 +439,9 @@ struct soc_intel_cannonlake_config {
struct i915_gpu_panel_config panel_cfg;
struct i915_gpu_controller_info gfx;
/* Disable CPU Turbo in IA32_MISC_ENABLE */
bool cpu_turbo_disable;
};
typedef struct soc_intel_cannonlake_config config_t;

View File

@ -91,6 +91,8 @@ static void configure_c_states(void)
/* All CPUs including BSP will run the following function. */
void soc_core_init(struct device *cpu)
{
config_t *cfg = config_of_soc();
/* Clear out pending MCEs */
/* TODO(adurbin): This should only be done on a cold boot. Also, some
* of these banks are core vs package scope. For now every CPU clears
@ -117,8 +119,10 @@ void soc_core_init(struct device *cpu)
/* Set energy policy */
set_energy_perf_bias(ENERGY_POLICY_NORMAL);
/* Enable Turbo */
enable_turbo();
if (cfg->cpu_turbo_disable)
disable_turbo();
else
enable_turbo();
/* Enable Vmx */
set_vmx_and_lock();