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ACPI ERST: build the ACPI ERST table
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This builds the ACPI ERST table to inform OSPM how to communicate
with the acpi-erst device.

Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
Reviewed-by: Ani Sinha <ani@anisinha.ca>
Message-Id: <1643402289-22216-7-git-send-email-eric.devolder@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@mstsirkin
Eric DeVolder authored and mstsirkin committed Feb 6, 2022
1 parent f7e26ff commit c9cd06c
Showing 1 changed file with 211 additions and 0 deletions.
211 changes: 211 additions & 0 deletions hw/acpi/erst.c
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Expand Up @@ -55,6 +55,27 @@
#define STATUS_RECORD_STORE_EMPTY 0x04
#define STATUS_RECORD_NOT_FOUND 0x05

/* ACPI 4.0: Table 17-19 Serialization Instructions */
#define INST_READ_REGISTER 0x00
#define INST_READ_REGISTER_VALUE 0x01
#define INST_WRITE_REGISTER 0x02
#define INST_WRITE_REGISTER_VALUE 0x03
#define INST_NOOP 0x04
#define INST_LOAD_VAR1 0x05
#define INST_LOAD_VAR2 0x06
#define INST_STORE_VAR1 0x07
#define INST_ADD 0x08
#define INST_SUBTRACT 0x09
#define INST_ADD_VALUE 0x0A
#define INST_SUBTRACT_VALUE 0x0B
#define INST_STALL 0x0C
#define INST_STALL_WHILE_TRUE 0x0D
#define INST_SKIP_NEXT_INSTRUCTION_IF_TRUE 0x0E
#define INST_GOTO 0x0F
#define INST_SET_SRC_ADDRESS_BASE 0x10
#define INST_SET_DST_ADDRESS_BASE 0x11
#define INST_MOVE_DATA 0x12

/* UEFI 2.1: Appendix N Common Platform Error Record */
#define UEFI_CPER_RECORD_MIN_SIZE 128U
#define UEFI_CPER_RECORD_LENGTH_OFFSET 20U
Expand Down Expand Up @@ -166,6 +187,196 @@ typedef struct {

} ERSTDeviceState;

/*******************************************************************/
/*******************************************************************/
typedef struct {
GArray *table_data;
pcibus_t bar;
uint8_t instruction;
uint8_t flags;
uint8_t register_bit_width;
pcibus_t register_offset;
} BuildSerializationInstructionEntry;

/* ACPI 4.0: 17.4.1.2 Serialization Instruction Entries */
static void build_serialization_instruction(
BuildSerializationInstructionEntry *e,
uint8_t serialization_action,
uint64_t value)
{
/* ACPI 4.0: Table 17-18 Serialization Instruction Entry */
struct AcpiGenericAddress gas;
uint64_t mask;

/* Serialization Action */
build_append_int_noprefix(e->table_data, serialization_action, 1);
/* Instruction */
build_append_int_noprefix(e->table_data, e->instruction, 1);
/* Flags */
build_append_int_noprefix(e->table_data, e->flags, 1);
/* Reserved */
build_append_int_noprefix(e->table_data, 0, 1);
/* Register Region */
gas.space_id = AML_SYSTEM_MEMORY;
gas.bit_width = e->register_bit_width;
gas.bit_offset = 0;
gas.access_width = (uint8_t)ctz32(e->register_bit_width) - 2;
gas.address = (uint64_t)(e->bar + e->register_offset);
build_append_gas_from_struct(e->table_data, &gas);
/* Value */
build_append_int_noprefix(e->table_data, value, 8);
/* Mask */
mask = (1ULL << (e->register_bit_width - 1) << 1) - 1;
build_append_int_noprefix(e->table_data, mask, 8);
}

/* ACPI 4.0: 17.4.1 Serialization Action Table */
void build_erst(GArray *table_data, BIOSLinker *linker, Object *erst_dev,
const char *oem_id, const char *oem_table_id)
{
/*
* Serialization Action Table
* The serialization action table must be generated first
* so that its size can be known in order to populate the
* Instruction Entry Count field.
*/
unsigned action;
GArray *table_instruction_data = g_array_new(FALSE, FALSE, sizeof(char));
pcibus_t bar0 = pci_get_bar_addr(PCI_DEVICE(erst_dev), 0);
AcpiTable table = { .sig = "ERST", .rev = 1, .oem_id = oem_id,
.oem_table_id = oem_table_id };
/* Contexts for the different ways ACTION and VALUE are accessed */
BuildSerializationInstructionEntry rd_value_32_val = {
.table_data = table_instruction_data, .bar = bar0, .flags = 0,
.instruction = INST_READ_REGISTER_VALUE,
.register_bit_width = 32,
.register_offset = ERST_VALUE_OFFSET,
};
BuildSerializationInstructionEntry rd_value_32 = {
.table_data = table_instruction_data, .bar = bar0, .flags = 0,
.instruction = INST_READ_REGISTER,
.register_bit_width = 32,
.register_offset = ERST_VALUE_OFFSET,
};
BuildSerializationInstructionEntry rd_value_64 = {
.table_data = table_instruction_data, .bar = bar0, .flags = 0,
.instruction = INST_READ_REGISTER,
.register_bit_width = 64,
.register_offset = ERST_VALUE_OFFSET,
};
BuildSerializationInstructionEntry wr_value_32_val = {
.table_data = table_instruction_data, .bar = bar0, .flags = 0,
.instruction = INST_WRITE_REGISTER_VALUE,
.register_bit_width = 32,
.register_offset = ERST_VALUE_OFFSET,
};
BuildSerializationInstructionEntry wr_value_32 = {
.table_data = table_instruction_data, .bar = bar0, .flags = 0,
.instruction = INST_WRITE_REGISTER,
.register_bit_width = 32,
.register_offset = ERST_VALUE_OFFSET,
};
BuildSerializationInstructionEntry wr_value_64 = {
.table_data = table_instruction_data, .bar = bar0, .flags = 0,
.instruction = INST_WRITE_REGISTER,
.register_bit_width = 64,
.register_offset = ERST_VALUE_OFFSET,
};
BuildSerializationInstructionEntry wr_action = {
.table_data = table_instruction_data, .bar = bar0, .flags = 0,
.instruction = INST_WRITE_REGISTER_VALUE,
.register_bit_width = 32,
.register_offset = ERST_ACTION_OFFSET,
};

trace_acpi_erst_pci_bar_0(bar0);

/* Serialization Instruction Entries */
action = ACTION_BEGIN_WRITE_OPERATION;
build_serialization_instruction(&wr_action, action, action);

action = ACTION_BEGIN_READ_OPERATION;
build_serialization_instruction(&wr_action, action, action);

action = ACTION_BEGIN_CLEAR_OPERATION;
build_serialization_instruction(&wr_action, action, action);

action = ACTION_END_OPERATION;
build_serialization_instruction(&wr_action, action, action);

action = ACTION_SET_RECORD_OFFSET;
build_serialization_instruction(&wr_value_32, action, 0);
build_serialization_instruction(&wr_action, action, action);

action = ACTION_EXECUTE_OPERATION;
build_serialization_instruction(&wr_value_32_val, action,
ERST_EXECUTE_OPERATION_MAGIC);
build_serialization_instruction(&wr_action, action, action);

action = ACTION_CHECK_BUSY_STATUS;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_32_val, action, 0x01);

action = ACTION_GET_COMMAND_STATUS;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_32, action, 0);

action = ACTION_GET_RECORD_IDENTIFIER;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_64, action, 0);

action = ACTION_SET_RECORD_IDENTIFIER;
build_serialization_instruction(&wr_value_64, action, 0);
build_serialization_instruction(&wr_action, action, action);

action = ACTION_GET_RECORD_COUNT;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_32, action, 0);

action = ACTION_BEGIN_DUMMY_WRITE_OPERATION;
build_serialization_instruction(&wr_action, action, action);

action = ACTION_GET_ERROR_LOG_ADDRESS_RANGE;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_64, action, 0);

action = ACTION_GET_ERROR_LOG_ADDRESS_LENGTH;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_64, action, 0);

action = ACTION_GET_ERROR_LOG_ADDRESS_RANGE_ATTRIBUTES;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_32, action, 0);

action = ACTION_GET_EXECUTE_OPERATION_TIMINGS;
build_serialization_instruction(&wr_action, action, action);
build_serialization_instruction(&rd_value_64, action, 0);

/* Serialization Header */
acpi_table_begin(&table, table_data);

/* Serialization Header Size */
build_append_int_noprefix(table_data, 48, 4);

/* Reserved */
build_append_int_noprefix(table_data, 0, 4);

/*
* Instruction Entry Count
* Each instruction entry is 32 bytes
*/
g_assert((table_instruction_data->len) % 32 == 0);
build_append_int_noprefix(table_data,
(table_instruction_data->len / 32), 4);

/* Serialization Instruction Entries */
g_array_append_vals(table_data, table_instruction_data->data,
table_instruction_data->len);
g_array_free(table_instruction_data, TRUE);

acpi_table_end(linker, &table);
}

/*******************************************************************/
/*******************************************************************/
static uint8_t *get_nvram_ptr_by_index(ERSTDeviceState *s, unsigned index)
Expand Down

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