mirror of https://gitee.com/openkylin/linux.git
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
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/*
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* UEFI Common Platform Error Record (CPER) support
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*
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* Copyright (C) 2010, Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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*
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* CPER is the format used to describe platform hardware error by
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* various APEI tables, such as ERST, BERT and HEST etc.
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*
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* For more information about CPER, please refer to Appendix N of UEFI
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* Specification version 2.3.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/time.h>
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#include <linux/cper.h>
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#include <linux/acpi.h>
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/*
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* CPER record ID need to be unique even after reboot, because record
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* ID is used as index for ERST storage, while CPER records from
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* multiple boot may co-exist in ERST.
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*/
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u64 cper_next_record_id(void)
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{
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static atomic64_t seq;
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if (!atomic64_read(&seq))
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atomic64_set(&seq, ((u64)get_seconds()) << 32);
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return atomic64_inc_return(&seq);
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}
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EXPORT_SYMBOL_GPL(cper_next_record_id);
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int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus)
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{
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if (estatus->data_length &&
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estatus->data_length < sizeof(struct acpi_hest_generic_data))
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return -EINVAL;
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if (estatus->raw_data_length &&
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estatus->raw_data_offset < sizeof(*estatus) + estatus->data_length)
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return -EINVAL;
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return 0;
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}
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EXPORT_SYMBOL_GPL(apei_estatus_check_header);
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int apei_estatus_check(const struct acpi_hest_generic_status *estatus)
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{
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struct acpi_hest_generic_data *gdata;
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unsigned int data_len, gedata_len;
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int rc;
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rc = apei_estatus_check_header(estatus);
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if (rc)
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return rc;
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data_len = estatus->data_length;
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gdata = (struct acpi_hest_generic_data *)(estatus + 1);
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while (data_len > sizeof(*gdata)) {
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gedata_len = gdata->error_data_length;
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if (gedata_len > data_len - sizeof(*gdata))
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return -EINVAL;
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data_len -= gedata_len + sizeof(*gdata);
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}
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if (data_len)
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return -EINVAL;
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return 0;
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}
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EXPORT_SYMBOL_GPL(apei_estatus_check);
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