arch/x86/kernel/acpi/apei.c

   1 /*
   2  * Arch-specific APEI-related functions.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <acpi/apei.h>
  16
  17 #include <asm/mce.h>
  18 #include <asm/tlbflush.h>
  19
  20 int arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr, void *data)
  21 {
  22 #ifdef CONFIG_X86_MCE
  23         int i;
  24         struct acpi_hest_ia_corrected *cmc;
  25         struct acpi_hest_ia_error_bank *mc_bank;
  26
  27         if (hest_hdr->type != ACPI_HEST_TYPE_IA32_CORRECTED_CHECK)
  28                 return 0;
  29
  30         cmc = (struct acpi_hest_ia_corrected *)hest_hdr;
  31         if (!cmc->enabled)
  32                 return 0;
  33
  34         /*
  35          * We expect HEST to provide a list of MC banks that report errors
  36          * in firmware first mode. Otherwise, return non-zero value to
  37          * indicate that we are done parsing HEST.
  38          */
  39         if (!(cmc->flags & ACPI_HEST_FIRMWARE_FIRST) ||
  40             !cmc->num_hardware_banks)
  41                 return 1;
  42
  43         pr_info("HEST: Enabling Firmware First mode for corrected errors.\n");
  44
  45         mc_bank = (struct acpi_hest_ia_error_bank *)(cmc + 1);
  46         for (i = 0; i < cmc->num_hardware_banks; i++, mc_bank++)
  47                 mce_disable_bank(mc_bank->bank_number);
  48 #endif
  49         return 1;
  50 }
  51
  52 void arch_apei_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
  53 {
  54 #ifdef CONFIG_X86_MCE
  55         apei_mce_report_mem_error(sev, mem_err);
  56 #endif
  57 }
  58
  59 void arch_apei_flush_tlb_one(unsigned long addr)
  60 {
  61         __flush_tlb_one(addr);
  62 }