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Diffstat (limited to 'hw/acpi/erst.c')
| -rw-r--r-- | hw/acpi/erst.c | 840 |
1 files changed, 840 insertions, 0 deletions
diff --git a/hw/acpi/erst.c b/hw/acpi/erst.c new file mode 100644 index 0000000..8a691cb --- /dev/null +++ b/hw/acpi/erst.c @@ -0,0 +1,840 @@ +/* + * ACPI Error Record Serialization Table, ERST, Implementation + * + * ACPI ERST introduced in ACPI 4.0, June 16, 2009. + * ACPI Platform Error Interfaces : Error Serialization + * + * Copyright (c) 2021 Oracle and/or its affiliates. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "hw/qdev-core.h" +#include "exec/memory.h" +#include "qom/object.h" +#include "hw/pci/pci.h" +#include "qom/object_interfaces.h" +#include "qemu/error-report.h" +#include "migration/vmstate.h" +#include "hw/qdev-properties.h" +#include "hw/acpi/acpi.h" +#include "hw/acpi/acpi-defs.h" +#include "hw/acpi/aml-build.h" +#include "hw/acpi/bios-linker-loader.h" +#include "exec/address-spaces.h" +#include "sysemu/hostmem.h" +#include "hw/acpi/erst.h" +#include "trace.h" + +/* ACPI 4.0: Table 17-16 Serialization Actions */ +#define ACTION_BEGIN_WRITE_OPERATION 0x0 +#define ACTION_BEGIN_READ_OPERATION 0x1 +#define ACTION_BEGIN_CLEAR_OPERATION 0x2 +#define ACTION_END_OPERATION 0x3 +#define ACTION_SET_RECORD_OFFSET 0x4 +#define ACTION_EXECUTE_OPERATION 0x5 +#define ACTION_CHECK_BUSY_STATUS 0x6 +#define ACTION_GET_COMMAND_STATUS 0x7 +#define ACTION_GET_RECORD_IDENTIFIER 0x8 +#define ACTION_SET_RECORD_IDENTIFIER 0x9 +#define ACTION_GET_RECORD_COUNT 0xA +#define ACTION_BEGIN_DUMMY_WRITE_OPERATION 0xB +#define ACTION_RESERVED 0xC +#define ACTION_GET_ERROR_LOG_ADDRESS_RANGE 0xD +#define ACTION_GET_ERROR_LOG_ADDRESS_LENGTH 0xE +#define ACTION_GET_ERROR_LOG_ADDRESS_RANGE_ATTRIBUTES 0xF +#define ACTION_GET_EXECUTE_OPERATION_TIMINGS 0x10 /* ACPI 6.3 */ + +/* ACPI 4.0: Table 17-17 Command Status Definitions */ +#define STATUS_SUCCESS 0x00 +#define STATUS_NOT_ENOUGH_SPACE 0x01 +#define STATUS_HARDWARE_NOT_AVAILABLE 0x02 +#define STATUS_FAILED 0x03 +#define STATUS_RECORD_STORE_EMPTY 0x04 +#define STATUS_RECORD_NOT_FOUND 0x05 + +/* UEFI 2.1: Appendix N Common Platform Error Record */ +#define UEFI_CPER_RECORD_MIN_SIZE 128U +#define UEFI_CPER_RECORD_LENGTH_OFFSET 20U +#define UEFI_CPER_RECORD_ID_OFFSET 96U +#define IS_UEFI_CPER_RECORD(ptr) \ + (((ptr)[0] == 'C') && \ + ((ptr)[1] == 'P') && \ + ((ptr)[2] == 'E') && \ + ((ptr)[3] == 'R')) + +/* + * NOTE that when accessing CPER fields within a record, memcpy() + * is utilized to avoid a possible misaligned access on the host. + */ + +/* + * This implementation is an ACTION (cmd) and VALUE (data) + * interface consisting of just two 64-bit registers. + */ +#define ERST_REG_SIZE (16UL) +#define ERST_ACTION_OFFSET (0UL) /* action (cmd) */ +#define ERST_VALUE_OFFSET (8UL) /* argument/value (data) */ + +/* + * ERST_RECORD_SIZE is the buffer size for exchanging ERST + * record contents. Thus, it defines the maximum record size. + * As this is mapped through a PCI BAR, it must be a power of + * two and larger than UEFI_CPER_RECORD_MIN_SIZE. + * The backing storage is divided into fixed size "slots", + * each ERST_RECORD_SIZE in length, and each "slot" + * storing a single record. No attempt at optimizing storage + * through compression, compaction, etc is attempted. + * NOTE that slot 0 is reserved for the backing storage header. + * Depending upon the size of the backing storage, additional + * slots will be part of the slot 0 header in order to account + * for a record_id for each available remaining slot. + */ +/* 8KiB records, not too small, not too big */ +#define ERST_RECORD_SIZE (8192UL) + +#define ACPI_ERST_MEMDEV_PROP "memdev" +#define ACPI_ERST_RECORD_SIZE_PROP "record_size" + +/* + * From the ACPI ERST spec sections: + * A record id of all 0s is used to indicate 'unspecified' record id. + * A record id of all 1s is used to indicate empty or end. + */ +#define ERST_UNSPECIFIED_RECORD_ID (0UL) +#define ERST_EMPTY_END_RECORD_ID (~0UL) + +#define ERST_IS_VALID_RECORD_ID(rid) \ + ((rid != ERST_UNSPECIFIED_RECORD_ID) && \ + (rid != ERST_EMPTY_END_RECORD_ID)) + +/* + * Implementation-specific definitions and types. + * Values are arbitrary and chosen for this implementation. + * See erst.rst documentation for details. + */ +#define ERST_EXECUTE_OPERATION_MAGIC 0x9CUL +#define ERST_STORE_MAGIC 0x524F545354535245UL /* ERSTSTOR */ +typedef struct { + uint64_t magic; + uint32_t record_size; + uint32_t storage_offset; /* offset to record storage beyond header */ + uint16_t version; + uint16_t reserved; + uint32_t record_count; + uint64_t map[]; /* contains record_ids, and position indicates index */ +} __attribute__((packed)) ERSTStorageHeader; + +/* + * Object cast macro + */ +#define ACPIERST(obj) \ + OBJECT_CHECK(ERSTDeviceState, (obj), TYPE_ACPI_ERST) + +/* + * Main ERST device state structure + */ +typedef struct { + PCIDevice parent_obj; + + /* Backend storage */ + HostMemoryBackend *hostmem; + MemoryRegion *hostmem_mr; + uint32_t storage_size; + uint32_t default_record_size; + + /* Programming registers */ + MemoryRegion iomem_mr; + + /* Exchange buffer */ + MemoryRegion exchange_mr; + + /* Interface state */ + uint8_t operation; + uint8_t busy_status; + uint8_t command_status; + uint32_t record_offset; + uint64_t reg_action; + uint64_t reg_value; + uint64_t record_identifier; + ERSTStorageHeader *header; + unsigned first_record_index; + unsigned last_record_index; + unsigned next_record_index; + +} ERSTDeviceState; + +/*******************************************************************/ +/*******************************************************************/ +static uint8_t *get_nvram_ptr_by_index(ERSTDeviceState *s, unsigned index) +{ + uint8_t *rc = NULL; + off_t offset = (index * le32_to_cpu(s->header->record_size)); + + g_assert(offset < s->storage_size); + + rc = memory_region_get_ram_ptr(s->hostmem_mr); + rc += offset; + + return rc; +} + +static void make_erst_storage_header(ERSTDeviceState *s) +{ + ERSTStorageHeader *header = s->header; + unsigned mapsz, headersz; + + header->magic = cpu_to_le64(ERST_STORE_MAGIC); + header->record_size = cpu_to_le32(s->default_record_size); + header->version = cpu_to_le16(0x0100); + header->reserved = cpu_to_le16(0x0000); + + /* Compute mapsize */ + mapsz = s->storage_size / s->default_record_size; + mapsz *= sizeof(uint64_t); + /* Compute header+map size */ + headersz = sizeof(ERSTStorageHeader) + mapsz; + /* Round up to nearest integer multiple of ERST_RECORD_SIZE */ + headersz = QEMU_ALIGN_UP(headersz, s->default_record_size); + header->storage_offset = cpu_to_le32(headersz); + + /* + * The HostMemoryBackend initializes contents to zero, + * so all record_ids stashed in the map are zero'd. + * As well the record_count is zero. Properly initialized. + */ +} + +static void check_erst_backend_storage(ERSTDeviceState *s, Error **errp) +{ + ERSTStorageHeader *header; + uint32_t record_size; + + header = memory_region_get_ram_ptr(s->hostmem_mr); + s->header = header; + + /* Ensure pointer to header is 64-bit aligned */ + g_assert(QEMU_PTR_IS_ALIGNED(header, sizeof(uint64_t))); + + /* + * Check if header is uninitialized; HostMemoryBackend inits to 0 + */ + if (le64_to_cpu(header->magic) == 0UL) { + make_erst_storage_header(s); + } + + /* Validity check record_size */ + record_size = le32_to_cpu(header->record_size); + if (!( + (record_size) && /* non zero */ + (record_size >= UEFI_CPER_RECORD_MIN_SIZE) && + (((record_size - 1) & record_size) == 0) && /* is power of 2 */ + (record_size >= 4096) /* PAGE_SIZE */ + )) { + error_setg(errp, "ERST record_size %u is invalid", record_size); + } + + /* Validity check header */ + if (!( + (le64_to_cpu(header->magic) == ERST_STORE_MAGIC) && + ((le32_to_cpu(header->storage_offset) % record_size) == 0) && + (le16_to_cpu(header->version) == 0x0100) && + (le16_to_cpu(header->reserved) == 0) + )) { + error_setg(errp, "ERST backend storage header is invalid"); + } + + /* Check storage_size against record_size */ + if (((s->storage_size % record_size) != 0) || + (record_size > s->storage_size)) { + error_setg(errp, "ACPI ERST requires storage size be multiple of " + "record size (%uKiB)", record_size); + } + + /* Compute offset of first and last record storage slot */ + s->first_record_index = le32_to_cpu(header->storage_offset) + / record_size; + s->last_record_index = (s->storage_size / record_size); +} + +static void update_map_entry(ERSTDeviceState *s, unsigned index, + uint64_t record_id) +{ + if (index < s->last_record_index) { + s->header->map[index] = cpu_to_le64(record_id); + } +} + +static unsigned find_next_empty_record_index(ERSTDeviceState *s) +{ + unsigned rc = 0; /* 0 not a valid index */ + unsigned index = s->first_record_index; + + for (; index < s->last_record_index; ++index) { + if (le64_to_cpu(s->header->map[index]) == ERST_UNSPECIFIED_RECORD_ID) { + rc = index; + break; + } + } + + return rc; +} + +static unsigned lookup_erst_record(ERSTDeviceState *s, + uint64_t record_identifier) +{ + unsigned rc = 0; /* 0 not a valid index */ + + /* Find the record_identifier in the map */ + if (record_identifier != ERST_UNSPECIFIED_RECORD_ID) { + /* + * Count number of valid records encountered, and + * short-circuit the loop if identifier not found + */ + uint32_t record_count = le32_to_cpu(s->header->record_count); + unsigned count = 0; + unsigned index; + for (index = s->first_record_index; index < s->last_record_index && + count < record_count; ++index) { + if (le64_to_cpu(s->header->map[index]) == record_identifier) { + rc = index; + break; + } + if (le64_to_cpu(s->header->map[index]) != + ERST_UNSPECIFIED_RECORD_ID) { + ++count; + } + } + } + + return rc; +} + +/* + * ACPI 4.0: 17.4.1.1 Serialization Actions, also see + * ACPI 4.0: 17.4.2.2 Operations - Reading 6.c and 2.c + */ +static unsigned get_next_record_identifier(ERSTDeviceState *s, + uint64_t *record_identifier, bool first) +{ + unsigned found = 0; + unsigned index; + + /* For operations needing to return 'first' record identifier */ + if (first) { + /* Reset initial index to beginning */ + s->next_record_index = s->first_record_index; + } + index = s->next_record_index; + + *record_identifier = ERST_EMPTY_END_RECORD_ID; + + if (le32_to_cpu(s->header->record_count)) { + for (; index < s->last_record_index; ++index) { + if (le64_to_cpu(s->header->map[index]) != + ERST_UNSPECIFIED_RECORD_ID) { + /* where to start next time */ + s->next_record_index = index + 1; + *record_identifier = le64_to_cpu(s->header->map[index]); + found = 1; + break; + } + } + } + if (!found) { + /* at end (ie scan complete), reset */ + s->next_record_index = s->first_record_index; + } + + return STATUS_SUCCESS; +} + +/* ACPI 4.0: 17.4.2.3 Operations - Clearing */ +static unsigned clear_erst_record(ERSTDeviceState *s) +{ + unsigned rc = STATUS_RECORD_NOT_FOUND; + unsigned index; + + /* Check for valid record identifier */ + if (!ERST_IS_VALID_RECORD_ID(s->record_identifier)) { + return STATUS_FAILED; + } + + index = lookup_erst_record(s, s->record_identifier); + if (index) { + /* No need to wipe record, just invalidate its map entry */ + uint32_t record_count; + update_map_entry(s, index, ERST_UNSPECIFIED_RECORD_ID); + record_count = le32_to_cpu(s->header->record_count); + record_count -= 1; + s->header->record_count = cpu_to_le32(record_count); + rc = STATUS_SUCCESS; + } + + return rc; +} + +/* ACPI 4.0: 17.4.2.2 Operations - Reading */ +static unsigned read_erst_record(ERSTDeviceState *s) +{ + unsigned rc = STATUS_RECORD_NOT_FOUND; + unsigned exchange_length; + unsigned index; + + /* Check if backend storage is empty */ + if (le32_to_cpu(s->header->record_count) == 0) { + return STATUS_RECORD_STORE_EMPTY; + } + + exchange_length = memory_region_size(&s->exchange_mr); + + /* Check for record identifier of all 0s */ + if (s->record_identifier == ERST_UNSPECIFIED_RECORD_ID) { + /* Set to 'first' record in storage */ + get_next_record_identifier(s, &s->record_identifier, true); + /* record_identifier is now a valid id, or all 1s */ + } + + /* Check for record identifier of all 1s */ + if (s->record_identifier == ERST_EMPTY_END_RECORD_ID) { + return STATUS_FAILED; + } + + /* Validate record_offset */ + if (s->record_offset > (exchange_length - UEFI_CPER_RECORD_MIN_SIZE)) { + return STATUS_FAILED; + } + + index = lookup_erst_record(s, s->record_identifier); + if (index) { + uint8_t *nvram; + uint8_t *exchange; + uint32_t record_length; + + /* Obtain pointer to the exchange buffer */ + exchange = memory_region_get_ram_ptr(&s->exchange_mr); + exchange += s->record_offset; + /* Obtain pointer to slot in storage */ + nvram = get_nvram_ptr_by_index(s, index); + /* Validate CPER record_length */ + memcpy((uint8_t *)&record_length, + &nvram[UEFI_CPER_RECORD_LENGTH_OFFSET], + sizeof(uint32_t)); + record_length = le32_to_cpu(record_length); + if (record_length < UEFI_CPER_RECORD_MIN_SIZE) { + rc = STATUS_FAILED; + } + if ((s->record_offset + record_length) > exchange_length) { + rc = STATUS_FAILED; + } + /* If all is ok, copy the record to the exchange buffer */ + if (rc != STATUS_FAILED) { + memcpy(exchange, nvram, record_length); + rc = STATUS_SUCCESS; + } + } else { + /* + * See "Reading : 'The steps performed by the platform ...' 2.c" + * Set to 'first' record in storage + */ + get_next_record_identifier(s, &s->record_identifier, true); + } + + return rc; +} + +/* ACPI 4.0: 17.4.2.1 Operations - Writing */ +static unsigned write_erst_record(ERSTDeviceState *s) +{ + unsigned rc = STATUS_FAILED; + unsigned exchange_length; + unsigned index; + uint64_t record_identifier; + uint32_t record_length; + uint8_t *exchange; + uint8_t *nvram = NULL; + bool record_found = false; + + exchange_length = memory_region_size(&s->exchange_mr); + + /* Validate record_offset */ + if (s->record_offset > (exchange_length - UEFI_CPER_RECORD_MIN_SIZE)) { + return STATUS_FAILED; + } + + /* Obtain pointer to record in the exchange buffer */ + exchange = memory_region_get_ram_ptr(&s->exchange_mr); + exchange += s->record_offset; + + /* Validate CPER record_length */ + memcpy((uint8_t *)&record_length, &exchange[UEFI_CPER_RECORD_LENGTH_OFFSET], + sizeof(uint32_t)); + record_length = le32_to_cpu(record_length); + if (record_length < UEFI_CPER_RECORD_MIN_SIZE) { + return STATUS_FAILED; + } + if ((s->record_offset + record_length) > exchange_length) { + return STATUS_FAILED; + } + + /* Extract record identifier */ + memcpy((uint8_t *)&record_identifier, &exchange[UEFI_CPER_RECORD_ID_OFFSET], + sizeof(uint64_t)); + record_identifier = le64_to_cpu(record_identifier); + + /* Check for valid record identifier */ + if (!ERST_IS_VALID_RECORD_ID(record_identifier)) { + return STATUS_FAILED; + } + + index = lookup_erst_record(s, record_identifier); + if (index) { + /* Record found, overwrite existing record */ + nvram = get_nvram_ptr_by_index(s, index); + record_found = true; + } else { + /* Record not found, not an overwrite, allocate for write */ + index = find_next_empty_record_index(s); + if (index) { + nvram = get_nvram_ptr_by_index(s, index); + } else { + /* All slots are occupied */ + rc = STATUS_NOT_ENOUGH_SPACE; + } + } + if (nvram) { + /* Write the record into the slot */ + memcpy(nvram, exchange, record_length); + memset(nvram + record_length, exchange_length - record_length, 0xFF); + /* If a new record, increment the record_count */ + if (!record_found) { + uint32_t record_count; + record_count = le32_to_cpu(s->header->record_count); + record_count += 1; /* writing new record */ + s->header->record_count = cpu_to_le32(record_count); + } + update_map_entry(s, index, record_identifier); + rc = STATUS_SUCCESS; + } + + return rc; +} + +/*******************************************************************/ + +static uint64_t erst_rd_reg64(hwaddr addr, + uint64_t reg, unsigned size) +{ + uint64_t rdval; + uint64_t mask; + unsigned shift; + + if (size == sizeof(uint64_t)) { + /* 64b access */ + mask = 0xFFFFFFFFFFFFFFFFUL; + shift = 0; + } else { + /* 32b access */ + mask = 0x00000000FFFFFFFFUL; + shift = ((addr & 0x4) == 0x4) ? 32 : 0; + } + + rdval = reg; + rdval >>= shift; + rdval &= mask; + + return rdval; +} + +static uint64_t erst_wr_reg64(hwaddr addr, + uint64_t reg, uint64_t val, unsigned size) +{ + uint64_t wrval; + uint64_t mask; + unsigned shift; + + if (size == sizeof(uint64_t)) { + /* 64b access */ + mask = 0xFFFFFFFFFFFFFFFFUL; + shift = 0; + } else { + /* 32b access */ + mask = 0x00000000FFFFFFFFUL; + shift = ((addr & 0x4) == 0x4) ? 32 : 0; + } + + val &= mask; + val <<= shift; + mask <<= shift; + wrval = reg; + wrval &= ~mask; + wrval |= val; + + return wrval; +} + +static void erst_reg_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + ERSTDeviceState *s = (ERSTDeviceState *)opaque; + + /* + * NOTE: All actions/operations/side effects happen on the WRITE, + * by this implementation's design. The READs simply return the + * reg_value contents. + */ + trace_acpi_erst_reg_write(addr, val, size); + + switch (addr) { + case ERST_VALUE_OFFSET + 0: + case ERST_VALUE_OFFSET + 4: + s->reg_value = erst_wr_reg64(addr, s->reg_value, val, size); + break; + case ERST_ACTION_OFFSET + 0: + /* + * NOTE: all valid values written to this register are of the + * ACTION_* variety. Thus there is no need to make this a 64-bit + * register, 32-bits is appropriate. As such ERST_ACTION_OFFSET+4 + * is not needed. + */ + switch (val) { + case ACTION_BEGIN_WRITE_OPERATION: + case ACTION_BEGIN_READ_OPERATION: + case ACTION_BEGIN_CLEAR_OPERATION: + case ACTION_BEGIN_DUMMY_WRITE_OPERATION: + case ACTION_END_OPERATION: + s->operation = val; + break; + case ACTION_SET_RECORD_OFFSET: + s->record_offset = s->reg_value; + break; + case ACTION_EXECUTE_OPERATION: + if ((uint8_t)s->reg_value == ERST_EXECUTE_OPERATION_MAGIC) { + s->busy_status = 1; + switch (s->operation) { + case ACTION_BEGIN_WRITE_OPERATION: + s->command_status = write_erst_record(s); + break; + case ACTION_BEGIN_READ_OPERATION: + s->command_status = read_erst_record(s); + break; + case ACTION_BEGIN_CLEAR_OPERATION: + s->command_status = clear_erst_record(s); + break; + case ACTION_BEGIN_DUMMY_WRITE_OPERATION: + s->command_status = STATUS_SUCCESS; + break; + case ACTION_END_OPERATION: + s->command_status = STATUS_SUCCESS; + break; + default: + s->command_status = STATUS_FAILED; + break; + } + s->busy_status = 0; + } + break; + case ACTION_CHECK_BUSY_STATUS: + s->reg_value = s->busy_status; + break; + case ACTION_GET_COMMAND_STATUS: + s->reg_value = s->command_status; + break; + case ACTION_GET_RECORD_IDENTIFIER: + s->command_status = get_next_record_identifier(s, + &s->reg_value, false); + break; + case ACTION_SET_RECORD_IDENTIFIER: + s->record_identifier = s->reg_value; + break; + case ACTION_GET_RECORD_COUNT: + s->reg_value = le32_to_cpu(s->header->record_count); + break; + case ACTION_GET_ERROR_LOG_ADDRESS_RANGE: + s->reg_value = (hwaddr)pci_get_bar_addr(PCI_DEVICE(s), 1); + break; + case ACTION_GET_ERROR_LOG_ADDRESS_LENGTH: + s->reg_value = le32_to_cpu(s->header->record_size); + break; + case ACTION_GET_ERROR_LOG_ADDRESS_RANGE_ATTRIBUTES: + s->reg_value = 0x0; /* intentional, not NVRAM mode */ + break; + case ACTION_GET_EXECUTE_OPERATION_TIMINGS: + s->reg_value = + (100ULL << 32) | /* 100us max time */ + (10ULL << 0) ; /* 10us min time */ + break; + default: + /* Unknown action/command, NOP */ + break; + } + break; + default: + /* This should not happen, but if it does, NOP */ + break; + } +} + +static uint64_t erst_reg_read(void *opaque, hwaddr addr, + unsigned size) +{ + ERSTDeviceState *s = (ERSTDeviceState *)opaque; + uint64_t val = 0; + + switch (addr) { + case ERST_ACTION_OFFSET + 0: + case ERST_ACTION_OFFSET + 4: + val = erst_rd_reg64(addr, s->reg_action, size); + break; + case ERST_VALUE_OFFSET + 0: + case ERST_VALUE_OFFSET + 4: + val = erst_rd_reg64(addr, s->reg_value, size); + break; + default: + break; + } + trace_acpi_erst_reg_read(addr, val, size); + return val; +} + +static const MemoryRegionOps erst_reg_ops = { + .read = erst_reg_read, + .write = erst_reg_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +/*******************************************************************/ +/*******************************************************************/ +static int erst_post_load(void *opaque, int version_id) +{ + ERSTDeviceState *s = opaque; + + /* Recompute pointer to header */ + s->header = (ERSTStorageHeader *)get_nvram_ptr_by_index(s, 0); + trace_acpi_erst_post_load(s->header, le32_to_cpu(s->header->record_size)); + + return 0; +} + +static const VMStateDescription erst_vmstate = { + .name = "acpi-erst", + .version_id = 1, + .minimum_version_id = 1, + .post_load = erst_post_load, + .fields = (VMStateField[]) { + VMSTATE_UINT8(operation, ERSTDeviceState), + VMSTATE_UINT8(busy_status, ERSTDeviceState), + VMSTATE_UINT8(command_status, ERSTDeviceState), + VMSTATE_UINT32(record_offset, ERSTDeviceState), + VMSTATE_UINT64(reg_action, ERSTDeviceState), + VMSTATE_UINT64(reg_value, ERSTDeviceState), + VMSTATE_UINT64(record_identifier, ERSTDeviceState), + VMSTATE_UINT32(next_record_index, ERSTDeviceState), + VMSTATE_END_OF_LIST() + } +}; + +static void erst_realizefn(PCIDevice *pci_dev, Error **errp) +{ + ERSTDeviceState *s = ACPIERST(pci_dev); + + trace_acpi_erst_realizefn_in(); + + if (!s->hostmem) { + error_setg(errp, "'" ACPI_ERST_MEMDEV_PROP "' property is not set"); + return; + } else if (host_memory_backend_is_mapped(s->hostmem)) { + error_setg(errp, "can't use already busy memdev: %s", + object_get_canonical_path_component(OBJECT(s->hostmem))); + return; + } + + s->hostmem_mr = host_memory_backend_get_memory(s->hostmem); + + /* HostMemoryBackend size will be multiple of PAGE_SIZE */ + s->storage_size = object_property_get_int(OBJECT(s->hostmem), "size", errp); + + /* Initialize backend storage and record_count */ + check_erst_backend_storage(s, errp); + + /* BAR 0: Programming registers */ + memory_region_init_io(&s->iomem_mr, OBJECT(pci_dev), &erst_reg_ops, s, + TYPE_ACPI_ERST, ERST_REG_SIZE); + pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->iomem_mr); + + /* BAR 1: Exchange buffer memory */ + memory_region_init_ram(&s->exchange_mr, OBJECT(pci_dev), + "erst.exchange", + le32_to_cpu(s->header->record_size), errp); + pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, + &s->exchange_mr); + + /* Include the backend storage in the migration stream */ + vmstate_register_ram_global(s->hostmem_mr); + + trace_acpi_erst_realizefn_out(s->storage_size); +} + +static void erst_reset(DeviceState *dev) +{ + ERSTDeviceState *s = ACPIERST(dev); + + trace_acpi_erst_reset_in(le32_to_cpu(s->header->record_count)); + s->operation = 0; + s->busy_status = 0; + s->command_status = STATUS_SUCCESS; + s->record_identifier = ERST_UNSPECIFIED_RECORD_ID; + s->record_offset = 0; + s->next_record_index = s->first_record_index; + /* NOTE: first/last_record_index are computed only once */ + trace_acpi_erst_reset_out(le32_to_cpu(s->header->record_count)); +} + +static Property erst_properties[] = { + DEFINE_PROP_LINK(ACPI_ERST_MEMDEV_PROP, ERSTDeviceState, hostmem, + TYPE_MEMORY_BACKEND, HostMemoryBackend *), + DEFINE_PROP_UINT32(ACPI_ERST_RECORD_SIZE_PROP, ERSTDeviceState, + default_record_size, ERST_RECORD_SIZE), + DEFINE_PROP_END_OF_LIST(), +}; + +static void erst_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + trace_acpi_erst_class_init_in(); + k->realize = erst_realizefn; + k->vendor_id = PCI_VENDOR_ID_REDHAT; + k->device_id = PCI_DEVICE_ID_REDHAT_ACPI_ERST; + k->revision = 0x00; + k->class_id = PCI_CLASS_OTHERS; + dc->reset = erst_reset; + dc->vmsd = &erst_vmstate; + dc->user_creatable = true; + dc->hotpluggable = false; + device_class_set_props(dc, erst_properties); + dc->desc = "ACPI Error Record Serialization Table (ERST) device"; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); + trace_acpi_erst_class_init_out(); +} + +static const TypeInfo erst_type_info = { + .name = TYPE_ACPI_ERST, + .parent = TYPE_PCI_DEVICE, + .class_init = erst_class_init, + .instance_size = sizeof(ERSTDeviceState), + .interfaces = (InterfaceInfo[]) { + { INTERFACE_CONVENTIONAL_PCI_DEVICE }, + { } + } +}; + +static void erst_register_types(void) +{ + type_register_static(&erst_type_info); +} + +type_init(erst_register_types) |