diff options
| -rw-r--r-- | src/cpu/intel/model_1067x/mp_init.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/src/cpu/intel/model_1067x/mp_init.c b/src/cpu/intel/model_1067x/mp_init.c index ab7785989d..acd56c82a8 100644 --- a/src/cpu/intel/model_1067x/mp_init.c +++ b/src/cpu/intel/model_1067x/mp_init.c @@ -60,11 +60,19 @@ static void per_cpu_smm_trigger(void) /* We don't care if the lock is already setting as our smm relocation handler is able to handle setups where SMRR is not enabled here. */ - if (!IS_ENABLED(CONFIG_SET_IA32_FC_LOCK_BIT)) - printk(BIOS_INFO, - "Overriding CONFIG_SET_IA32_FC_LOCK_BIT to enable SMRR\n"); - ia32_ft_ctrl.lo |= (1 << 3) | (1 << 0); - wrmsr(IA32_FEATURE_CONTROL, ia32_ft_ctrl); + if (ia32_ft_ctrl.lo & (1 << 0)) { + /* IA32_FEATURE_CONTROL locked. If we set it again we + get an illegal instruction. */ + printk(BIOS_DEBUG, "IA32_FEATURE_CONTROL already locked\n"); + printk(BIOS_DEBUG, "SMRR status: %senabled\n", + ia32_ft_ctrl.lo & (1 << 3) ? "" : "not "); + } else { + if (!IS_ENABLED(CONFIG_SET_IA32_FC_LOCK_BIT)) + printk(BIOS_INFO, + "Overriding CONFIG_SET_IA32_FC_LOCK_BIT to enable SMRR\n"); + ia32_ft_ctrl.lo |= (1 << 3) | (1 << 0); + wrmsr(IA32_FEATURE_CONTROL, ia32_ft_ctrl); + } } else { set_vmx_and_lock(); } |