[PATCH v2 01/22] ACPICA: Add parsing for IVRS IVHD 40h and device entry F0h

From: Erik Kaneda <erik.kaneda@intel.com>
To: "Rafael J . Wysocki" <rafael@kernel.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>
Cc: Alexander Monakov <amonakov@ispras.ru>,
	Bob Moore <robert.moore@intel.com>,
	Erik Kaneda <erik.kaneda@intel.com>
Subject: [PATCH v2 01/22] ACPICA: Add parsing for IVRS IVHD 40h and device entry F0h
Date: Tue,  6 Apr 2021 14:30:07 -0700	[thread overview]
Message-ID: <20210406213028.718796-2-erik.kaneda@intel.com> (raw)
In-Reply-To: <20210406213028.718796-1-erik.kaneda@intel.com>

From: Alexander Monakov <amonakov@ispras.ru>

ACPICA commit eefb865355514048380d921de5efcf30027d6b02

IVHD type 40h uses the same field layout as type 11h, but adds support
for a new device entry type F0h (ACPI HID device entry). The new device
entry type has variable length: after fixed-length fields occupying 22
bytes, there's a field of length up to 255 (as given by the preceding
field).

Link: https://github.com/acpica/acpica/commit/eefb8653
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
---
 include/acpi/actbl2.h | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index d6478c430c99..d1178427aa40 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -276,6 +276,7 @@ struct acpi_ivrs_header {
 enum acpi_ivrs_type {
 	ACPI_IVRS_TYPE_HARDWARE1 = 0x10,
 	ACPI_IVRS_TYPE_HARDWARE2 = 0x11,
+	ACPI_IVRS_TYPE_HARDWARE3 = 0x40,
 	ACPI_IVRS_TYPE_MEMORY1 = 0x20,
 	ACPI_IVRS_TYPE_MEMORY2 = 0x21,
 	ACPI_IVRS_TYPE_MEMORY3 = 0x22
@@ -364,7 +365,11 @@ enum acpi_ivrs_device_entry_type {
 	ACPI_IVRS_TYPE_ALIAS_START = 67,	/* Uses struct acpi_ivrs_device8a */
 	ACPI_IVRS_TYPE_EXT_SELECT = 70,	/* Uses struct acpi_ivrs_device8b */
 	ACPI_IVRS_TYPE_EXT_START = 71,	/* Uses struct acpi_ivrs_device8b */
-	ACPI_IVRS_TYPE_SPECIAL = 72	/* Uses struct acpi_ivrs_device8c */
+	ACPI_IVRS_TYPE_SPECIAL = 72,	/* Uses struct acpi_ivrs_device8c */
+
+	/* Variable-length device entries */
+
+	ACPI_IVRS_TYPE_HID = 240	/* Uses ACPI_IVRS_DEVICE_HID */
 };
 
 /* Values for Data field above */
@@ -416,6 +421,16 @@ struct acpi_ivrs_device8c {
 #define ACPI_IVHD_IOAPIC            1
 #define ACPI_IVHD_HPET              2
 
+/* Type 240: variable-length device entry */
+
+struct acpi_ivrs_device_hid {
+	struct acpi_ivrs_de_header header;
+	u64 acpi_hid;
+	u64 acpi_cid;
+	u8 uid_type;
+	u8 uid_length;
+};
+
 /* 0x20, 0x21, 0x22: I/O Virtualization Memory Definition Block (IVMD) */
 
 struct acpi_ivrs_memory {
-- 
2.29.2

