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authorPatrick Rudolph <patrick.rudolph@9elements.com>2021-02-16 11:52:38 +0100
committerPatrick Georgi <pgeorgi@google.com>2021-02-20 09:02:00 +0000
commite9b0830422206a9c11ff4e83420e385353c3ee8a (patch)
treeb958d3c339820ab7d227d5303480d81bb8434d88 /src/soc/intel/cannonlake/cpu.c
parente0c2c06ba17278e15ff805cbf75a6d5fc5ad474b (diff)
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>
Diffstat (limited to 'src/soc/intel/cannonlake/cpu.c')
-rw-r--r--src/soc/intel/cannonlake/cpu.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/soc/intel/cannonlake/cpu.c b/src/soc/intel/cannonlake/cpu.c
index 8b845c004c..2520559cdc 100644
--- a/src/soc/intel/cannonlake/cpu.c
+++ b/src/soc/intel/cannonlake/cpu.c
@@ -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();