90 lines
3.3 KiB
C
90 lines
3.3 KiB
C
/*
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* Support for generating APEI tables and recording CPER for Guests
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*
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* Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD.
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*
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* Author: Dongjiu Geng <gengdongjiu@huawei.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "hw/acpi/ghes.h"
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#include "hw/acpi/aml-build.h"
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#define ACPI_GHES_ERRORS_FW_CFG_FILE "etc/hardware_errors"
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#define ACPI_GHES_DATA_ADDR_FW_CFG_FILE "etc/hardware_errors_addr"
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/* The max size in bytes for one error block */
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#define ACPI_GHES_MAX_RAW_DATA_LENGTH (1 * KiB)
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/* Now only support ARMv8 SEA notification type error source */
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#define ACPI_GHES_ERROR_SOURCE_COUNT 1
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/*
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* Build table for the hardware error fw_cfg blob.
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* Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
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* See docs/specs/acpi_hest_ghes.rst for blobs format.
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*/
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void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
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{
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int i, error_status_block_offset;
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/* Build error_block_address */
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for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
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build_append_int_noprefix(hardware_errors, 0, sizeof(uint64_t));
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}
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/* Build read_ack_register */
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for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
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/*
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* Initialize the value of read_ack_register to 1, so GHES can be
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* writeable after (re)boot.
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* ACPI 6.2: 18.3.2.8 Generic Hardware Error Source version 2
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* (GHESv2 - Type 10)
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*/
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build_append_int_noprefix(hardware_errors, 1, sizeof(uint64_t));
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}
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/* Generic Error Status Block offset in the hardware error fw_cfg blob */
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error_status_block_offset = hardware_errors->len;
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/* Reserve space for Error Status Data Block */
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acpi_data_push(hardware_errors,
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ACPI_GHES_MAX_RAW_DATA_LENGTH * ACPI_GHES_ERROR_SOURCE_COUNT);
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/* Tell guest firmware to place hardware_errors blob into RAM */
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bios_linker_loader_alloc(linker, ACPI_GHES_ERRORS_FW_CFG_FILE,
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hardware_errors, sizeof(uint64_t), false);
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for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
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/*
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* Tell firmware to patch error_block_address entries to point to
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* corresponding "Generic Error Status Block"
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*/
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bios_linker_loader_add_pointer(linker,
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ACPI_GHES_ERRORS_FW_CFG_FILE, sizeof(uint64_t) * i,
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sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
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error_status_block_offset + i * ACPI_GHES_MAX_RAW_DATA_LENGTH);
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}
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/*
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* tell firmware to write hardware_errors GPA into
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* hardware_errors_addr fw_cfg, once the former has been initialized.
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*/
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bios_linker_loader_write_pointer(linker, ACPI_GHES_DATA_ADDR_FW_CFG_FILE,
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0, sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE, 0);
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}
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