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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"
#include "qemu/error-report.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
/* Generic Hardware Error Source version 2 */
#define ACPI_GHES_SOURCE_GENERIC_ERROR_V2 10
/* Address offset in Generic Address Structure(GAS) */
#define GAS_ADDR_OFFSET 4
/*
* Hardware Error Notification
* ACPI 4.0: 17.3.2.7 Hardware Error Notification
* Composes dummy Hardware Error Notification descriptor of specified type
*/
static void build_ghes_hw_error_notification(GArray *table, const uint8_t type)
{
/* Type */
build_append_int_noprefix(table, type, 1);
/*
* Length:
* Total length of the structure in bytes
*/
build_append_int_noprefix(table, 28, 1);
/* Configuration Write Enable */
build_append_int_noprefix(table, 0, 2);
/* Poll Interval */
build_append_int_noprefix(table, 0, 4);
/* Vector */
build_append_int_noprefix(table, 0, 4);
/* Switch To Polling Threshold Value */
build_append_int_noprefix(table, 0, 4);
/* Switch To Polling Threshold Window */
build_append_int_noprefix(table, 0, 4);
/* Error Threshold Value */
build_append_int_noprefix(table, 0, 4);
/* Error Threshold Window */
build_append_int_noprefix(table, 0, 4);
}
/*
* 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);
}
/* Build Generic Hardware Error Source version 2 (GHESv2) */
static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
{
uint64_t address_offset;
/*
* Type:
* Generic Hardware Error Source version 2(GHESv2 - Type 10)
*/
build_append_int_noprefix(table_data, ACPI_GHES_SOURCE_GENERIC_ERROR_V2, 2);
/* Source Id */
build_append_int_noprefix(table_data, source_id, 2);
/* Related Source Id */
build_append_int_noprefix(table_data, 0xffff, 2);
/* Flags */
build_append_int_noprefix(table_data, 0, 1);
/* Enabled */
build_append_int_noprefix(table_data, 1, 1);
/* Number of Records To Pre-allocate */
build_append_int_noprefix(table_data, 1, 4);
/* Max Sections Per Record */
build_append_int_noprefix(table_data, 1, 4);
/* Max Raw Data Length */
build_append_int_noprefix(table_data, ACPI_GHES_MAX_RAW_DATA_LENGTH, 4);
address_offset = table_data->len;
/* Error Status Address */
build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
4 /* QWord access */, 0);
bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
address_offset + GAS_ADDR_OFFSET, sizeof(uint64_t),
ACPI_GHES_ERRORS_FW_CFG_FILE, source_id * sizeof(uint64_t));
switch (source_id) {
case ACPI_HEST_SRC_ID_SEA:
/*
* Notification Structure
* Now only enable ARMv8 SEA notification type
*/
build_ghes_hw_error_notification(table_data, ACPI_GHES_NOTIFY_SEA);
break;
default:
error_report("Not support this error source");
abort();
}
/* Error Status Block Length */
build_append_int_noprefix(table_data, ACPI_GHES_MAX_RAW_DATA_LENGTH, 4);
/*
* Read Ack Register
* ACPI 6.1: 18.3.2.8 Generic Hardware Error Source
* version 2 (GHESv2 - Type 10)
*/
address_offset = table_data->len;
build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
4 /* QWord access */, 0);
bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
address_offset + GAS_ADDR_OFFSET,
sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
(ACPI_GHES_ERROR_SOURCE_COUNT + source_id) * sizeof(uint64_t));
/*
* Read Ack Preserve field
* We only provide the first bit in Read Ack Register to OSPM to write
* while the other bits are preserved.
*/
build_append_int_noprefix(table_data, ~0x1ULL, 8);
/* Read Ack Write */
build_append_int_noprefix(table_data, 0x1, 8);
}
/* Build Hardware Error Source Table */
void acpi_build_hest(GArray *table_data, BIOSLinker *linker)
{
uint64_t hest_start = table_data->len;
/* Hardware Error Source Table header*/
acpi_data_push(table_data, sizeof(AcpiTableHeader));
/* Error Source Count */
build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
build_ghes_v2(table_data, ACPI_HEST_SRC_ID_SEA, linker);
build_header(linker, table_data, (void *)(table_data->data + hest_start),
"HEST", table_data->len - hest_start, 1, NULL, NULL);
}
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