Patrick Georgi submitted this change.
mb/siemens/mc_ehl: Disable all P-States
In order to get a reliable real-time performance disable all P-States
for all mc_ehl based mainboard.
Change-Id: I22857cc0f1476483ca82c1c872e4519e4b350ea9
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58894
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <lean.sheng.tan@intel.com>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
---
M src/mainboard/siemens/mc_ehl/mainboard.c
1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/src/mainboard/siemens/mc_ehl/mainboard.c b/src/mainboard/siemens/mc_ehl/mainboard.c
index eff2d21..fc03115 100644
--- a/src/mainboard/siemens/mc_ehl/mainboard.c
+++ b/src/mainboard/siemens/mc_ehl/mainboard.c
@@ -122,6 +122,9 @@
/* Set maximum package C-state to PkgC0C1 */
params->PkgCStateLimit = 0;
+
+ /* Disable P-States */
+ params->MaxRatio = 0;
}
static void mainboard_init(void *chip_info)
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