diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2014-12-10 08:16:43 -0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-04 12:40:31 +0200 |
| commit | 7f28e4ee01cb91750ce6fb84e77e5c7c86afd3ea (patch) | |
| tree | ddd2a0a3d77d34e5f0b655874090813c58d8f694 /src | |
| parent | 4a69c34d54d587ba00c6c8e4f9056596014a7541 (diff) | |
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@chromium.org>
Original-Commit-Id: d408c1b462983c682d61c6c447692391c2b52183
Original-Change-Id: Ib5ad746767ee0a56bc7e59de679a9342f053c0e5
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/234401
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9281
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/broadwell/cpu.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/soc/intel/broadwell/cpu.c b/src/soc/intel/broadwell/cpu.c index 1f2ee0d7ba..912f8ae554 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); } |