From d408c1b462983c682d61c6c447692391c2b52183 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Wed, 10 Dec 2014 08:16:43 -0800 Subject: [PATCH] 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: Ib5ad746767ee0a56bc7e59de679a9342f053c0e5 Signed-off-by: Duncan Laurie Reviewed-on: https://chromium-review.googlesource.com/234401 Reviewed-by: Aaron Durbin --- 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 835a272bfc..84ced0bed0 100644 --- a/src/soc/intel/broadwell/cpu.c +++ b/src/soc/intel/broadwell/cpu.c @@ -486,7 +486,10 @@ 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; @@ -588,9 +591,6 @@ 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(); } @@ -693,6 +693,9 @@ 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);