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/*
* Support for generating APEI tables and recording CPER for Guests
*
* Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD.
*
* Author: Dongjiu Geng <gengdongjiu@huawei.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "hw/acpi/ghes.h"
#include "hw/acpi/aml-build.h"
#define ACPI_GHES_ERRORS_FW_CFG_FILE "etc/hardware_errors"
#define ACPI_GHES_DATA_ADDR_FW_CFG_FILE "etc/hardware_errors_addr"
/* The max size in bytes for one error block */
#define ACPI_GHES_MAX_RAW_DATA_LENGTH (1 * KiB)
/* Now only support ARMv8 SEA notification type error source */
#define ACPI_GHES_ERROR_SOURCE_COUNT 1
/*
* Build table for the hardware error fw_cfg blob.
* Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
* See docs/specs/acpi_hest_ghes.rst for blobs format.
*/
void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
{
int i, error_status_block_offset;
/* Build error_block_address */
for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
build_append_int_noprefix(hardware_errors, 0, sizeof(uint64_t));
}
/* Build read_ack_register */
for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
/*
* Initialize the value of read_ack_register to 1, so GHES can be
* writeable after (re)boot.
* ACPI 6.2: 18.3.2.8 Generic Hardware Error Source version 2
* (GHESv2 - Type 10)
*/
build_append_int_noprefix(hardware_errors, 1, sizeof(uint64_t));
}
/* Generic Error Status Block offset in the hardware error fw_cfg blob */
error_status_block_offset = hardware_errors->len;
/* Reserve space for Error Status Data Block */
acpi_data_push(hardware_errors,
ACPI_GHES_MAX_RAW_DATA_LENGTH * ACPI_GHES_ERROR_SOURCE_COUNT);
/* Tell guest firmware to place hardware_errors blob into RAM */
bios_linker_loader_alloc(linker, ACPI_GHES_ERRORS_FW_CFG_FILE,
hardware_errors, sizeof(uint64_t), false);
for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
/*
* Tell firmware to patch error_block_address entries to point to
* corresponding "Generic Error Status Block"
*/
bios_linker_loader_add_pointer(linker,
ACPI_GHES_ERRORS_FW_CFG_FILE, sizeof(uint64_t) * i,
sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
error_status_block_offset + i * ACPI_GHES_MAX_RAW_DATA_LENGTH);
}
/*
* tell firmware to write hardware_errors GPA into
* hardware_errors_addr fw_cfg, once the former has been initialized.
*/
bios_linker_loader_write_pointer(linker, ACPI_GHES_DATA_ADDR_FW_CFG_FILE,
0, sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE, 0);
}
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