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/* 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>
/* Parallel MP initialization support. */
static const void *microcode_patch;
static void pre_mp_init(void)
{
intel_microcode_load_unlocked(microcode_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 = microcode_patch;
*parallel = 1;
}
/* 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)
{
microcode_patch = intel_microcode_find();
if (mp_init_with_smm(cpu_bus, &mp_ops))
printk(BIOS_ERR, "MP initialization failure.\n");
}
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