| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/x86/mp.h> |
| #include <cpu/intel/microcode.h> |
| #include <cpu/intel/smm_reloc.h> |
| #include <cpu/intel/common/common.h> |
| #include <device/device.h> |
| #include <types.h> |
| |
| /* Parallel MP initialization support. */ |
| static void pre_mp_init(void) |
| { |
| const void *patch = intel_microcode_find(); |
| intel_microcode_load_unlocked(patch); |
| |
| /* Setup MTRRs based on physical address size. */ |
| x86_setup_mtrrs_with_detect(); |
| x86_mtrr_check(); |
| } |
| |
| static int get_cpu_count(void) |
| { |
| const struct cpuid_result cpuid1 = cpuid(1); |
| const char cores = (cpuid1.ebx >> 16) & 0xf; |
| |
| printk(BIOS_DEBUG, "CPU has %u cores.\n", cores); |
| |
| return cores; |
| } |
| |
| static void get_microcode_info(const void **microcode, int *parallel) |
| { |
| *microcode = intel_microcode_find(); |
| *parallel = !intel_ht_supported(); |
| } |
| |
| /* the SMRR enable and lock bit need to be set in IA32_FEATURE_CONTROL |
| to enable SMRR so configure IA32_FEATURE_CONTROL early on */ |
| static void pre_mp_smm_init(void) |
| { |
| smm_initialize(); |
| } |
| |
| #define SMRR_SUPPORTED (1 << 11) |
| |
| static void per_cpu_smm_trigger(void) |
| { |
| msr_t mtrr_cap = rdmsr(MTRR_CAP_MSR); |
| if (cpu_has_alternative_smrr() && mtrr_cap.lo & SMRR_SUPPORTED) { |
| set_feature_ctrl_vmx(); |
| msr_t ia32_ft_ctrl = rdmsr(IA32_FEATURE_CONTROL); |
| /* 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 (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 (!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(); |
| } |
| |
| /* Relocate the SMM handler. */ |
| smm_relocate(); |
| } |
| |
| static void post_mp_init(void) |
| { |
| /* Now that all APs have been relocated as well as the BSP let SMIs |
| * start flowing. */ |
| global_smi_enable(); |
| |
| /* Lock down the SMRAM space. */ |
| smm_lock(); |
| } |
| |
| static const struct mp_ops mp_ops = { |
| .pre_mp_init = pre_mp_init, |
| .get_cpu_count = get_cpu_count, |
| .get_smm_info = smm_info, |
| .get_microcode_info = get_microcode_info, |
| .pre_mp_smm_init = pre_mp_smm_init, |
| .per_cpu_smm_trigger = per_cpu_smm_trigger, |
| .relocation_handler = smm_relocation_handler, |
| .post_mp_init = post_mp_init, |
| }; |
| |
| void mp_init_cpus(struct bus *cpu_bus) |
| { |
| /* TODO: Handle mp_init_with_smm failure? */ |
| mp_init_with_smm(cpu_bus, &mp_ops); |
| } |