[PATCH v1 05/19] ACPICA: infrastructure: Add new header and ACPI_DMT_BUF26 types

From: Rafael J. Wysocki
Date: Fri Apr 25 2025 - 15:37:09 EST


From: Tony Luck <tony.luck@xxxxxxxxx>

ACPICA commit 52840d3826bd7e183fcb555e044e190aea0b5021

New MRRM tables can have subtables that are larger than 255 bytes.

Add a new header typedef that uses u16 for Length. Could be
backported to acpi_aspt_header, struct acpi_dmar_header, struct acpi_nfit_header,
struct acpi_prmt_module_header, struct acpi_prmt_module_info. Will be used for
upcoming ERDT table.

MRRM table has a 26-byte reserved section in header. Add ACPI_DMT_BUF26
to describe this in struct acpi_dmtable_info.

Link: https://github.com/acpica/acpica/commit/52840d38
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
include/acpi/actbl1.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index e0cbda95fec8..b403b0b60bf6 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -155,6 +155,13 @@ struct acpi_aspt_acpi_mbox_regs {
u64 reserved2[2];
};

+/* Larger subtable header (when Length can exceed 255) */
+
+struct acpi_subtable_header_16 {
+ u16 type;
+ u16 length;
+};
+
/*******************************************************************************
*
* ASF - Alert Standard Format table (Signature "ASF!")
--
2.43.0