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acpi: Create subtable parsing infrastructure

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Parsing entries in an ACPI table had assumed a generic header
structure. There is no standard ACPI header, though, so less common
layouts with different field sizes required custom parsers to go through
their subtable entry list.

Create the infrastructure for adding different table types so parsing
the entries array may be more reused for all ACPI system tables and
the common code doesn't need to be duplicated.

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Tested-by: Brice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Keith Busch 2019-03-11 14:55:57 -06:00 • committed by Greg Kroah-Hartman
parent c03a0fd0b6
commit 60574d1e05
15 changed files with 113 additions and 63 deletions
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5
include/linux/acpi.h
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@ -141,10 +141,13 @@ enum acpi_address_range_id {
/* Table Handlers */
union acpi_subtable_headers {
struct acpi_subtable_header common;
};
typedef int (*acpi_tbl_table_handler)(struct acpi_table_header *table);
typedef int (*acpi_tbl_entry_handler)(struct acpi_subtable_header *header,
typedef int (*acpi_tbl_entry_handler)(union acpi_subtable_headers *header,
const unsigned long end);
/* Debugger support */