ACPICA: Interpret SIDP structures in DMAR

ACPICA commit af51f730e0bccf789686cea68e116d5f0b27aacb

Added in revision 3.4 of the VT-d spec. To support SIDP, part of the
previously reserved field in the device scope structure was used to
create a 1-byte "Flags" field.

Link: acpica/acpica@af51f730
Signed-off-by: Alexey Neyman <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: stilor

include/acpi/actbl1.h

@@ -819,15 +819,17 @@ enum acpi_dmar_type {
 	ACPI_DMAR_TYPE_HARDWARE_AFFINITY = 3,
 	ACPI_DMAR_TYPE_NAMESPACE = 4,
 	ACPI_DMAR_TYPE_SATC = 5,
-	ACPI_DMAR_TYPE_RESERVED = 6	/* 6 and greater are reserved */
+	ACPI_DMAR_TYPE_SIDP = 6,
+	ACPI_DMAR_TYPE_RESERVED = 7	/* 7 and greater are reserved */
 };
 
 /* DMAR Device Scope structure */
 
 struct acpi_dmar_device_scope {
 	u8 entry_type;
 	u8 length;
-	u16 reserved;
+	u8 flags;
+	u8 reserved;
 	u8 enumeration_id;
 	u8 bus;
 };
@@ -923,6 +925,15 @@ struct acpi_dmar_satc {
 	u8 reserved;
 	u16 segment;
 };
+
+/* 6: so_c Integrated Device Property Reporting Structure */
+
+struct acpi_dmar_sidp {
+	struct acpi_dmar_header header;
+	u16 reserved;
+	u16 segment;
+};
+
 /*******************************************************************************
  *
  * DRTM - Dynamic Root of Trust for Measurement table