finalize.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi.h>
#include <cpu/x86/mp.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/msr.h>
#include <bootstate.h>
#include <console/console.h>
#include <amdblocks/acpi.h>
#include <types.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)
{
        printk(BIOS_SPEW, "Lock SMM configuration\n");
 
        if (mp_run_on_all_cpus(per_core_finalize, NULL) != CB_SUCCESS)
                printk(BIOS_WARNING, "Failed to finalize all cores\n");
}
 
static void soc_finalize(void *unused)
{
        finalize_cores();
 
        if (!acpi_is_wakeup_s3()) {
                acpi_clear_pm_gpe_status();
 
                if (CONFIG(HAVE_SMI_HANDLER))
                        acpi_disable_sci();
                else
                        acpi_enable_sci();
        }
 
        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);