On 06/16/2013 05:50 PM, Borislav Petkov wrote:
On Fri, Jun 14, 2013 at 11:47:21PM +0530, Naveen N. Rao wrote:+static int __init hest_parse_cmc(struct acpi_hest_header *hest_hdr, void *data) +{ + int i; + struct acpi_hest_ia_corrected *cmc; + struct acpi_hest_ia_error_bank *mc_bank; + + if (hest_hdr->type != ACPI_HEST_TYPE_IA32_CORRECTED_CHECK) + return 0; + + if (!((struct acpi_hest_generic *)hest_hdr)->enabled) + return 0; + + cmc = (struct acpi_hest_ia_corrected *)hest_hdr; + if (!(cmc->flags & ACPI_HEST_FIRMWARE_FIRST)) + return 0; + + /* + * We expect HEST to provide a list of MC banks that + * report errors through firmware first mode. + */ + if (cmc->num_hardware_banks <= 0) + return 0; + + pr_info("HEST: Enabling Firmware First mode for corrected errors\n"); + + mc_bank = (struct acpi_hest_ia_error_bank *)(cmc + 1); + for (i = 0; i < cmc->num_hardware_banks; i++, mc_bank++) + mce_disable_bank(mc_bank->bank_number);One more thing: we never trust the BIOS so mce_disable_bank() should sanity-check this mc_bank->bank_number against the number of the actually available banks on the system before disabling anything.
Agreed. Will add the check.
Thanks.
Thanks, Naveen -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
