diff options
| -rw-r--r-- | src/soc/intel/cannonlake/cpu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/soc/intel/cannonlake/cpu.c b/src/soc/intel/cannonlake/cpu.c index 821694eb53..99fcadd581 100644 --- a/src/soc/intel/cannonlake/cpu.c +++ b/src/soc/intel/cannonlake/cpu.c @@ -62,8 +62,9 @@ static void configure_c_states(const config_t *const cfg) msr = rdmsr(MSR_PKG_CST_CONFIG_CONTROL); if (cfg->max_package_c_state && (msr.lo & 0xf) >= cfg->max_package_c_state) { msr.lo = (msr.lo & ~0xf) | ((cfg->max_package_c_state - 1) & 0xf); - wrmsr(MSR_PKG_CST_CONFIG_CONTROL, msr); } + msr.lo |= CST_CFG_LOCK_MASK; + wrmsr(MSR_PKG_CST_CONFIG_CONTROL, msr); /* C-state Interrupt Response Latency Control 0 - package C3 latency */ msr.hi = 0; |