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| author | Subrata Banik <subrata.banik@intel.com> | 2017-05-12 11:43:57 +0530 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-05-16 17:45:38 +0200 |
| commit | 6b45ee44a9bbccb4dc42ea454aa20ef7d02a9fd1 (patch) | |
| tree | ef5eb4fa57c2bde345e5cec61668e33fe1d311b3 /src/soc/intel/skylake/acpi.c | |
| parent | 481b364222322b96dc16ebc126040ed9c0aa2811 (diff) | |
| download | coreboot-6b45ee44a9bbccb4dc42ea454aa20ef7d02a9fd1.tar.xz | |
soc/intel/skylake: Add option to enable/disable EIST
Set MSR 0x1A0 bit[16] based on EIST config option.
Default Hardware Managed P-state (HWP) also known as Intel Speed Shift
is enabled on SKL hence disable EIST and ACPI P-state table.
Change-Id: I2b7374a8a04b596edcc88165b64980b7aa09e2a7
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/19676
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/soc/intel/skylake/acpi.c')
| -rw-r--r-- | src/soc/intel/skylake/acpi.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/soc/intel/skylake/acpi.c b/src/soc/intel/skylake/acpi.c index e8d0c1683a..64438bdd80 100644 --- a/src/soc/intel/skylake/acpi.c +++ b/src/soc/intel/skylake/acpi.c @@ -523,9 +523,10 @@ void generate_cpu_entries(device_t device) generate_c_state_entries(is_s0ix_enable, max_c_state); - /* Generate P-state tables */ - generate_p_state_entries(core_id, - cores_per_package); + if (config->eist_enable) + /* Generate P-state tables */ + generate_p_state_entries(core_id, + cores_per_package); acpigen_pop_len(); } |