src/soc/amd/common/block/cpu/smm/finalize.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <amdblocks/acpi.h>
   5 #include <amdblocks/smm.h>
   6 #include <bootstate.h>
   7 #include <console/console.h>
   8 #include <cpu/x86/mp.h>
   9 #include <cpu/x86/msr.h>
  10 #include <types.h>
  11
  12 static void late_smm_lock(void *unused)
  13 {
  14         /* Finalize SMM settings */
  15         if (is_smm_locked()) /* Skip if already locked, avoid GPF */
  16                 return;
  17
  18         if (CONFIG(HAVE_SMI_HANDLER))
  19                 tseg_valid();
  20
  21         lock_smm();
  22 }
  23
  24 static void late_smm_finalize(void)
  25 {
  26         printk(BIOS_SPEW, "Lock SMM configuration\n");
  27         if (mp_run_on_all_cpus(late_smm_lock, NULL) != CB_SUCCESS)
  28                 printk(BIOS_WARNING, "Failed to finalize all cores\n");
  29 }
  30
  31 static void soc_finalize(void *unused)
  32 {
  33         if (CONFIG(SOC_AMD_COMMON_LATE_SMM_LOCKING))
  34                 late_smm_finalize();
  35
  36         if (!acpi_is_wakeup_s3()) {
  37                 acpi_clear_pm_gpe_status();
  38
  39                 if (CONFIG(HAVE_SMI_HANDLER))
  40                         acpi_disable_sci();
  41                 else
  42                         acpi_enable_sci();
  43         }
  44
  45         post_code(POSTCODE_OS_BOOT);
  46 }
  47
  48 BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, soc_finalize, NULL);
  49 BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, soc_finalize, NULL);