kvm_arch_on_sigbus_vcpu() error injection uses source_id as index in etc/hardware_errors to find out Error Status Data Block entry corresponding to error source. So supported source_id values should be assigned here and not be changed afterwards to make sure that guest will write error into expected Error Status Data Block. Before QEMU writes a new error to ACPI table, it will check whether previous error has been acknowledged. If not acknowledged, the new errors will be ignored and not be recorded. For the errors section type, QEMU simulate it to memory section error. Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com> Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-id: 20200512030609.19593-9-gengdongjiu@huawei.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
449 lines
15 KiB
C
449 lines
15 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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#include "qemu/error-report.h"
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#include "hw/acpi/generic_event_device.h"
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#include "hw/nvram/fw_cfg.h"
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#include "qemu/uuid.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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/* Generic Hardware Error Source version 2 */
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#define ACPI_GHES_SOURCE_GENERIC_ERROR_V2 10
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/* Address offset in Generic Address Structure(GAS) */
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#define GAS_ADDR_OFFSET 4
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/*
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* The total size of Generic Error Data Entry
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* ACPI 6.1/6.2: 18.3.2.7.1 Generic Error Data,
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* Table 18-343 Generic Error Data Entry
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*/
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#define ACPI_GHES_DATA_LENGTH 72
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/* The memory section CPER size, UEFI 2.6: N.2.5 Memory Error Section */
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#define ACPI_GHES_MEM_CPER_LENGTH 80
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/* Masks for block_status flags */
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#define ACPI_GEBS_UNCORRECTABLE 1
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/*
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* Total size for Generic Error Status Block except Generic Error Data Entries
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* ACPI 6.2: 18.3.2.7.1 Generic Error Data,
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* Table 18-380 Generic Error Status Block
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*/
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#define ACPI_GHES_GESB_SIZE 20
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/*
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* Values for error_severity field
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*/
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enum AcpiGenericErrorSeverity {
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ACPI_CPER_SEV_RECOVERABLE = 0,
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ACPI_CPER_SEV_FATAL = 1,
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ACPI_CPER_SEV_CORRECTED = 2,
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ACPI_CPER_SEV_NONE = 3,
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};
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/*
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* Hardware Error Notification
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* ACPI 4.0: 17.3.2.7 Hardware Error Notification
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* Composes dummy Hardware Error Notification descriptor of specified type
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*/
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static void build_ghes_hw_error_notification(GArray *table, const uint8_t type)
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{
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/* Type */
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build_append_int_noprefix(table, type, 1);
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/*
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* Length:
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* Total length of the structure in bytes
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*/
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build_append_int_noprefix(table, 28, 1);
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/* Configuration Write Enable */
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build_append_int_noprefix(table, 0, 2);
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/* Poll Interval */
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build_append_int_noprefix(table, 0, 4);
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/* Vector */
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build_append_int_noprefix(table, 0, 4);
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/* Switch To Polling Threshold Value */
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build_append_int_noprefix(table, 0, 4);
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/* Switch To Polling Threshold Window */
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build_append_int_noprefix(table, 0, 4);
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/* Error Threshold Value */
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build_append_int_noprefix(table, 0, 4);
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/* Error Threshold Window */
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build_append_int_noprefix(table, 0, 4);
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}
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/*
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* Generic Error Data Entry
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* ACPI 6.1: 18.3.2.7.1 Generic Error Data
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*/
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static void acpi_ghes_generic_error_data(GArray *table,
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const uint8_t *section_type, uint32_t error_severity,
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uint8_t validation_bits, uint8_t flags,
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uint32_t error_data_length, QemuUUID fru_id,
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uint64_t time_stamp)
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{
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const uint8_t fru_text[20] = {0};
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/* Section Type */
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g_array_append_vals(table, section_type, 16);
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/* Error Severity */
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build_append_int_noprefix(table, error_severity, 4);
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/* Revision */
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build_append_int_noprefix(table, 0x300, 2);
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/* Validation Bits */
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build_append_int_noprefix(table, validation_bits, 1);
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/* Flags */
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build_append_int_noprefix(table, flags, 1);
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/* Error Data Length */
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build_append_int_noprefix(table, error_data_length, 4);
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/* FRU Id */
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g_array_append_vals(table, fru_id.data, ARRAY_SIZE(fru_id.data));
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/* FRU Text */
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g_array_append_vals(table, fru_text, sizeof(fru_text));
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/* Timestamp */
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build_append_int_noprefix(table, time_stamp, 8);
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}
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/*
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* Generic Error Status Block
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* ACPI 6.1: 18.3.2.7.1 Generic Error Data
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*/
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static void acpi_ghes_generic_error_status(GArray *table, uint32_t block_status,
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uint32_t raw_data_offset, uint32_t raw_data_length,
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uint32_t data_length, uint32_t error_severity)
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{
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/* Block Status */
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build_append_int_noprefix(table, block_status, 4);
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/* Raw Data Offset */
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build_append_int_noprefix(table, raw_data_offset, 4);
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/* Raw Data Length */
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build_append_int_noprefix(table, raw_data_length, 4);
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/* Data Length */
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build_append_int_noprefix(table, data_length, 4);
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/* Error Severity */
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build_append_int_noprefix(table, error_severity, 4);
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}
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/* UEFI 2.6: N.2.5 Memory Error Section */
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static void acpi_ghes_build_append_mem_cper(GArray *table,
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uint64_t error_physical_addr)
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{
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/*
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* Memory Error Record
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*/
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/* Validation Bits */
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build_append_int_noprefix(table,
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(1ULL << 14) | /* Type Valid */
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(1ULL << 1) /* Physical Address Valid */,
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8);
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/* Error Status */
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build_append_int_noprefix(table, 0, 8);
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/* Physical Address */
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build_append_int_noprefix(table, error_physical_addr, 8);
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/* Skip all the detailed information normally found in such a record */
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build_append_int_noprefix(table, 0, 48);
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/* Memory Error Type */
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build_append_int_noprefix(table, 0 /* Unknown error */, 1);
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/* Skip all the detailed information normally found in such a record */
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build_append_int_noprefix(table, 0, 7);
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}
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static int acpi_ghes_record_mem_error(uint64_t error_block_address,
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uint64_t error_physical_addr)
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{
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GArray *block;
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/* Memory Error Section Type */
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const uint8_t uefi_cper_mem_sec[] =
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UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
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0xED, 0x7C, 0x83, 0xB1);
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/* invalid fru id: ACPI 4.0: 17.3.2.6.1 Generic Error Data,
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* Table 17-13 Generic Error Data Entry
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*/
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QemuUUID fru_id = {};
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uint32_t data_length;
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block = g_array_new(false, true /* clear */, 1);
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/* This is the length if adding a new generic error data entry*/
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data_length = ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH;
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/*
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* Check whether it will run out of the preallocated memory if adding a new
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* generic error data entry
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*/
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if ((data_length + ACPI_GHES_GESB_SIZE) > ACPI_GHES_MAX_RAW_DATA_LENGTH) {
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error_report("Not enough memory to record new CPER!!!");
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g_array_free(block, true);
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return -1;
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}
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/* Build the new generic error status block header */
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acpi_ghes_generic_error_status(block, ACPI_GEBS_UNCORRECTABLE,
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0, 0, data_length, ACPI_CPER_SEV_RECOVERABLE);
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/* Build this new generic error data entry header */
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acpi_ghes_generic_error_data(block, uefi_cper_mem_sec,
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ACPI_CPER_SEV_RECOVERABLE, 0, 0,
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ACPI_GHES_MEM_CPER_LENGTH, fru_id, 0);
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/* Build the memory section CPER for above new generic error data entry */
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acpi_ghes_build_append_mem_cper(block, error_physical_addr);
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/* Write the generic error data entry into guest memory */
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cpu_physical_memory_write(error_block_address, block->data, block->len);
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g_array_free(block, true);
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return 0;
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}
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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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/* Build Generic Hardware Error Source version 2 (GHESv2) */
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static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
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{
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uint64_t address_offset;
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/*
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* Type:
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* Generic Hardware Error Source version 2(GHESv2 - Type 10)
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*/
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build_append_int_noprefix(table_data, ACPI_GHES_SOURCE_GENERIC_ERROR_V2, 2);
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/* Source Id */
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build_append_int_noprefix(table_data, source_id, 2);
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/* Related Source Id */
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build_append_int_noprefix(table_data, 0xffff, 2);
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/* Flags */
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build_append_int_noprefix(table_data, 0, 1);
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/* Enabled */
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build_append_int_noprefix(table_data, 1, 1);
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/* Number of Records To Pre-allocate */
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build_append_int_noprefix(table_data, 1, 4);
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/* Max Sections Per Record */
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build_append_int_noprefix(table_data, 1, 4);
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/* Max Raw Data Length */
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build_append_int_noprefix(table_data, ACPI_GHES_MAX_RAW_DATA_LENGTH, 4);
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address_offset = table_data->len;
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/* Error Status Address */
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build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
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4 /* QWord access */, 0);
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bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
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address_offset + GAS_ADDR_OFFSET, sizeof(uint64_t),
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ACPI_GHES_ERRORS_FW_CFG_FILE, source_id * sizeof(uint64_t));
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switch (source_id) {
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case ACPI_HEST_SRC_ID_SEA:
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/*
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* Notification Structure
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* Now only enable ARMv8 SEA notification type
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*/
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build_ghes_hw_error_notification(table_data, ACPI_GHES_NOTIFY_SEA);
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break;
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default:
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error_report("Not support this error source");
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abort();
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}
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/* Error Status Block Length */
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build_append_int_noprefix(table_data, ACPI_GHES_MAX_RAW_DATA_LENGTH, 4);
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/*
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* Read Ack Register
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* ACPI 6.1: 18.3.2.8 Generic Hardware Error Source
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* version 2 (GHESv2 - Type 10)
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*/
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address_offset = table_data->len;
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build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 0x40, 0,
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4 /* QWord access */, 0);
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bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
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address_offset + GAS_ADDR_OFFSET,
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sizeof(uint64_t), ACPI_GHES_ERRORS_FW_CFG_FILE,
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(ACPI_GHES_ERROR_SOURCE_COUNT + source_id) * sizeof(uint64_t));
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/*
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* Read Ack Preserve field
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* We only provide the first bit in Read Ack Register to OSPM to write
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* while the other bits are preserved.
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*/
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build_append_int_noprefix(table_data, ~0x1ULL, 8);
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/* Read Ack Write */
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build_append_int_noprefix(table_data, 0x1, 8);
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}
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/* Build Hardware Error Source Table */
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void acpi_build_hest(GArray *table_data, BIOSLinker *linker)
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{
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uint64_t hest_start = table_data->len;
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/* Hardware Error Source Table header*/
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acpi_data_push(table_data, sizeof(AcpiTableHeader));
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/* Error Source Count */
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build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
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build_ghes_v2(table_data, ACPI_HEST_SRC_ID_SEA, linker);
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build_header(linker, table_data, (void *)(table_data->data + hest_start),
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"HEST", table_data->len - hest_start, 1, NULL, NULL);
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}
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void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,
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GArray *hardware_error)
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{
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/* Create a read-only fw_cfg file for GHES */
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fw_cfg_add_file(s, ACPI_GHES_ERRORS_FW_CFG_FILE, hardware_error->data,
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hardware_error->len);
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/* Create a read-write fw_cfg file for Address */
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fw_cfg_add_file_callback(s, ACPI_GHES_DATA_ADDR_FW_CFG_FILE, NULL, NULL,
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NULL, &(ags->ghes_addr_le), sizeof(ags->ghes_addr_le), false);
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}
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int acpi_ghes_record_errors(uint8_t source_id, uint64_t physical_address)
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{
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uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0;
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uint64_t start_addr;
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bool ret = -1;
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AcpiGedState *acpi_ged_state;
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AcpiGhesState *ags;
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assert(source_id < ACPI_HEST_SRC_ID_RESERVED);
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acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
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NULL));
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g_assert(acpi_ged_state);
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ags = &acpi_ged_state->ghes_state;
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start_addr = le64_to_cpu(ags->ghes_addr_le);
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if (physical_address) {
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if (source_id < ACPI_HEST_SRC_ID_RESERVED) {
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start_addr += source_id * sizeof(uint64_t);
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}
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cpu_physical_memory_read(start_addr, &error_block_addr,
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sizeof(error_block_addr));
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error_block_addr = le64_to_cpu(error_block_addr);
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read_ack_register_addr = start_addr +
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ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
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cpu_physical_memory_read(read_ack_register_addr,
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&read_ack_register, sizeof(read_ack_register));
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/* zero means OSPM does not acknowledge the error */
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if (!read_ack_register) {
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error_report("OSPM does not acknowledge previous error,"
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" so can not record CPER for current error anymore");
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} else if (error_block_addr) {
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read_ack_register = cpu_to_le64(0);
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/*
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* Clear the Read Ack Register, OSPM will write it to 1 when
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* it acknowledges this error.
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*/
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cpu_physical_memory_write(read_ack_register_addr,
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&read_ack_register, sizeof(uint64_t));
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ret = acpi_ghes_record_mem_error(error_block_addr,
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physical_address);
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} else
|
|
error_report("can not find Generic Error Status Block");
|
|
}
|
|
|
|
return ret;
|
|
}
|