[coreboot-gerrit] New patch to review for coreboot: 05c7648 broadwell: Enable turbo ratio if available
Stefan Reinauer (stefan.reinauer@coreboot.org)
gerrit at coreboot.org
Thu Apr 2 23:53:29 CEST 2015
Stefan Reinauer (stefan.reinauer at coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9281
-gerrit
commit 05c76486bebe400aacd1cf807da66750a16ecc2a
Author: Duncan Laurie <dlaurie at chromium.org>
Date: Wed Dec 10 08:16:43 2014 -0800
broadwell: Enable turbo ratio if available
When turning up the CPU frequency set it to turbo if that is
a possibility. Also only set the frequency on the boot CPU
since that is all we need it on, this will allow the 1-core
turbo ratio.
BUG=chrome-os-partner:28234
BRANCH=samus,auron
TEST=build and boot on samus
Change-Id: I573eb7a507305814ec48cc2f624b8e6ddad43f84
Signed-off-by: Stefan Reinauer <reinauer at chromium.org>
Original-Commit-Id: d408c1b462983c682d61c6c447692391c2b52183
Original-Change-Id: Ib5ad746767ee0a56bc7e59de679a9342f053c0e5
Original-Signed-off-by: Duncan Laurie <dlaurie at chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/234401
Original-Reviewed-by: Aaron Durbin <adurbin at chromium.org>
---
src/soc/intel/broadwell/cpu.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/src/soc/intel/broadwell/cpu.c b/src/soc/intel/broadwell/cpu.c
index 1f2ee0d..912f8ae 100644
--- a/src/soc/intel/broadwell/cpu.c
+++ b/src/soc/intel/broadwell/cpu.c
@@ -485,7 +485,10 @@ static void set_max_ratio(void)
perf_ctl.hi = 0;
/* Check for configurable TDP option */
- if (cpu_config_tdp_levels()) {
+ if (get_turbo_state() == TURBO_ENABLED) {
+ msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
+ perf_ctl.lo = (msr.lo & 0xff) << 8;
+ } else if (cpu_config_tdp_levels()) {
/* Set to nominal TDP ratio */
msr = rdmsr(MSR_CONFIG_TDP_NOMINAL);
perf_ctl.lo = (msr.lo & 0xff) << 8;
@@ -587,9 +590,6 @@ static void cpu_core_init(device_t cpu)
/* Set energy policy */
set_energy_perf_bias(ENERGY_POLICY_NORMAL);
- /* Set Max Ratio */
- set_max_ratio();
-
/* Enable Turbo */
enable_turbo();
}
@@ -692,6 +692,9 @@ void broadwell_init_cpus(device_t dev)
printk(BIOS_ERR, "MP initialization failure.\n");
}
+ /* Set Max Ratio */
+ set_max_ratio();
+
/* Restore the default SMM region. */
restore_default_smm_area(smm_save_area);
}
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