Re: [PATCH v2 07/18] x86, acpi: Also initialize signature and length when parsing root table.

[Toshi Kani <toshi.kani@hp.com>]

On Thu, 2013-08-01 at 15:06 +0800, Tang Chen wrote:
> Besides the phys addr of the acpi tables, it will be very convenient if
> we also have the signature of each table in acpi_gbl_root_table_list at
> early time. We can find SRAT easily by comparing the signature.
> 
> This patch alse record signature and some other info in
> acpi_gbl_root_table_list at early time.
> 
> Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
> ---
>  drivers/acpi/acpica/tbutils.c |   22 ++++++++++++++++++++++
>  1 files changed, 22 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c

Same as patch 5/18.  Please change the title to "x86, ACPICA:".  Added
Bob.

Thanks,
-Toshi


> index 9d68ffc..5d31887 100644
> --- a/drivers/acpi/acpica/tbutils.c
> +++ b/drivers/acpi/acpica/tbutils.c
> @@ -627,6 +627,7 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
>  	u32 i;
>  	u32 table_count;
>  	struct acpi_table_header *table;
> +	struct acpi_table_desc *table_desc;
>  	acpi_physical_address address;
>  	acpi_physical_address uninitialized_var(rsdt_address);
>  	u32 length;
> @@ -766,6 +767,27 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
>  	 */
>  	acpi_os_unmap_memory(table, length);
>  
> +	/*
> +	 * Also initialize the table entries here, so that later we can use them
> +	 * to find SRAT at very eraly time to reserve hotpluggable memory.
> +	 */
> +	for (i = 2; i < acpi_gbl_root_table_list.current_table_count; i++) {
> +		table = acpi_os_map_memory(
> +				acpi_gbl_root_table_list.tables[i].address,
> +				sizeof(struct acpi_table_header));
> +		if (!table)
> +			return_ACPI_STATUS(AE_NO_MEMORY);
> +
> +		table_desc = &acpi_gbl_root_table_list.tables[i];
> +
> +		table_desc->pointer = NULL;
> +		table_desc->length = table->length;
> +		table_desc->flags = ACPI_TABLE_ORIGIN_MAPPED;
> +		ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
> +
> +		acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
> +	}
> +
>  	return_ACPI_STATUS(AE_OK);
>  }
>  


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