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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <cpu/x86/mp.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/msr.h>
#include <bootstate.h>
#include <timer.h>
#include <console/console.h>
static void per_core_finalize(void *unused)
{
msr_t hwcr, mask;
/* Finalize SMM settings */
hwcr = rdmsr(HWCR_MSR);
if (hwcr.lo & SMM_LOCK) /* Skip if already locked, avoid GPF */
return;
if (CONFIG(HAVE_SMI_HANDLER)) {
mask = rdmsr(SMM_MASK_MSR);
mask.lo |= SMM_TSEG_VALID;
wrmsr(SMM_MASK_MSR, mask);
}
hwcr.lo |= SMM_LOCK;
wrmsr(HWCR_MSR, hwcr);
}
static void finalize_cores(void)
{
int r;
printk(BIOS_SPEW, "Lock SMM configuration\n");
r = mp_run_on_all_cpus(per_core_finalize, NULL);
if (r)
printk(BIOS_WARNING, "Failed to finalize all cores\n");
}
static void soc_finalize(void *unused)
{
finalize_cores();
post_code(POST_OS_BOOT);
}
BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, soc_finalize, NULL);
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, soc_finalize, NULL);
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