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Re: [PATCH v11 06/10] ACPI ERST: build the ACPI ERST table
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From: |
Ani Sinha |
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Subject: |
Re: [PATCH v11 06/10] ACPI ERST: build the ACPI ERST table |
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Date: |
Wed, 15 Dec 2021 22:03:08 +0530 |
On Wed, Dec 15, 2021 at 9:08 PM Eric DeVolder <eric.devolder@oracle.com> wrote:
>
> 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>
> ---
> hw/acpi/erst.c | 188
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 188 insertions(+)
>
> diff --git a/hw/acpi/erst.c b/hw/acpi/erst.c
> index bb6cad4..05177b3 100644
> --- a/hw/acpi/erst.c
> +++ b/hw/acpi/erst.c
> @@ -59,6 +59,27 @@
> #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
> @@ -172,6 +193,173 @@ typedef struct {
>
> /*******************************************************************/
> /*******************************************************************/
> +
> +/* ACPI 4.0: 17.4.1.2 Serialization Instruction Entries */
> +static void build_serialization_instruction_entry(GArray *table_data,
> + uint8_t serialization_action,
> + uint8_t instruction,
> + uint8_t flags,
> + uint8_t register_bit_width,
> + uint64_t register_address,
> + uint64_t value)
> +{
> + /* ACPI 4.0: Table 17-18 Serialization Instruction Entry */
> + struct AcpiGenericAddress gas;
> + uint64_t mask;
> +
> + /* Serialization Action */
> + build_append_int_noprefix(table_data, serialization_action, 1);
> + /* Instruction */
> + build_append_int_noprefix(table_data, instruction , 1);
> + /* Flags */
> + build_append_int_noprefix(table_data, flags , 1);
> + /* Reserved */
> + build_append_int_noprefix(table_data, 0 , 1);
> + /* Register Region */
> + gas.space_id = AML_SYSTEM_MEMORY;
> + gas.bit_width = register_bit_width;
> + gas.bit_offset = 0;
> + gas.access_width = ctz32(register_bit_width) - 2;
> + gas.address = register_address;
> + build_append_gas_from_struct(table_data, &gas);
> + /* Value */
> + build_append_int_noprefix(table_data, value , 8);
> + /* Mask */
> + mask = (1ULL << (register_bit_width - 1) << 1) - 1;
> + build_append_int_noprefix(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)
> +{
> + GArray *table_instruction_data;
> + unsigned action;
This variable can be eliminated (see below).
> + 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 };
> +
> + trace_acpi_erst_pci_bar_0(bar0);
> +
> + /*
> + * 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.
> + */
> + table_instruction_data = g_array_new(FALSE, FALSE, sizeof(char));
> +
> + /*
> + * Macros for use with construction of the action instructions
> + */
> +#define build_read_register(action, width_in_bits, reg) \
> + build_serialization_instruction_entry(table_instruction_data, \
> + action, INST_READ_REGISTER, 0, width_in_bits, \
> + bar0 + reg, 0)
> +
> +#define build_read_register_value(action, width_in_bits, reg, value) \
> + build_serialization_instruction_entry(table_instruction_data, \
> + action, INST_READ_REGISTER_VALUE, 0, width_in_bits, \
> + bar0 + reg, value)
> +
> +#define build_write_register(action, width_in_bits, reg, value) \
> + build_serialization_instruction_entry(table_instruction_data, \
> + action, INST_WRITE_REGISTER, 0, width_in_bits, \
> + bar0 + reg, value)
> +
> +#define build_write_register_value(action, width_in_bits, reg, value) \
> + build_serialization_instruction_entry(table_instruction_data, \
> + action, INST_WRITE_REGISTER_VALUE, 0, width_in_bits, \
> + bar0 + reg, value)
> +
> + /* Serialization Instruction Entries */
> + action = ACTION_BEGIN_WRITE_OPERATION;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_BEGIN_READ_OPERATION;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_BEGIN_CLEAR_OPERATION;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_END_OPERATION;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_SET_RECORD_OFFSET;
> + build_write_register(action, 32, ERST_VALUE_OFFSET, 0);
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_EXECUTE_OPERATION;
> + build_write_register_value(action, 32, ERST_VALUE_OFFSET,
> + ERST_EXECUTE_OPERATION_MAGIC);
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_CHECK_BUSY_STATUS;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register_value(action, 32, ERST_VALUE_OFFSET, 0x01);
> +
> + action = ACTION_GET_COMMAND_STATUS;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register(action, 32, ERST_VALUE_OFFSET);
> +
> + action = ACTION_GET_RECORD_IDENTIFIER;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register(action, 64, ERST_VALUE_OFFSET);
> +
> + action = ACTION_SET_RECORD_IDENTIFIER;
> + build_write_register(action, 64, ERST_VALUE_OFFSET, 0);
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_GET_RECORD_COUNT;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register(action, 32, ERST_VALUE_OFFSET);
> +
> + action = ACTION_BEGIN_DUMMY_WRITE_OPERATION;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> +
> + action = ACTION_GET_ERROR_LOG_ADDRESS_RANGE;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register(action, 64, ERST_VALUE_OFFSET);
> +
> + action = ACTION_GET_ERROR_LOG_ADDRESS_LENGTH;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register(action, 64, ERST_VALUE_OFFSET);
> +
> + action = ACTION_GET_ERROR_LOG_ADDRESS_RANGE_ATTRIBUTES;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register(action, 32, ERST_VALUE_OFFSET);
> +
> + action = ACTION_GET_EXECUTE_OPERATION_TIMINGS;
> + build_write_register_value(action, 32, ERST_ACTION_OFFSET, action);
> + build_read_register(action, 64, ERST_VALUE_OFFSET);
if I am reading this right, build_write_register_value() is called
with the same parameters, except that action is changing. We can
optimize repetative calls with the same parameters.
build_read_register can be split into build_read_register_32() and
build_read_register_64().
So we can have :
build_write_register_value(ACTION_GET_EXECUTE_OPERATION_TIMINGS);
build_read_register_64(ACTION_GET_EXECUTE_OPERATION_TIMINGS);
> +
> + /* 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)
> {
> uint8_t *rc = NULL;
> --
> 1.8.3.1
>
- [PATCH v11 00/10] acpi: Error Record Serialization Table, ERST, support for QEMU, Eric DeVolder, 2021/12/15
- [PATCH v11 04/10] ACPI ERST: header file for ERST, Eric DeVolder, 2021/12/15
- [PATCH v11 08/10] ACPI ERST: qtest for ERST, Eric DeVolder, 2021/12/15
- [PATCH v11 09/10] ACPI ERST: bios-tables-test testcase, Eric DeVolder, 2021/12/15
- [PATCH v11 10/10] ACPI ERST: step 6 of bios-tables-test.c, Eric DeVolder, 2021/12/15
- [PATCH v11 05/10] ACPI ERST: support for ACPI ERST feature, Eric DeVolder, 2021/12/15
- [PATCH v11 02/10] ACPI ERST: specification for ERST support, Eric DeVolder, 2021/12/15