linux-kernel - [PATCH v8 3/7] ACPI: APEI: EINJ: Add einjv2 extension struct

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Message-ID: <20250604223804.842501-4-zaidal@os.amperecomputing.com>
Date: Wed,  4 Jun 2025 15:38:00 -0700
From: Zaid Alali <zaidal@...amperecomputing.com>
To: rafael@...nel.org,
	lenb@...nel.org,
	james.morse@....com,
	tony.luck@...el.com,
	bp@...en8.de,
	kees@...nel.org,
	gustavoars@...nel.org,
	zaidal@...amperecomputing.com,
	Jonathan.Cameron@...wei.com,
	sudeep.holla@....com,
	u.kleine-koenig@...libre.com,
	jonathanh@...dia.com,
	viro@...iv.linux.org.uk,
	ira.weiny@...el.com,
	peterz@...radead.org,
	sthanneeru.opensrc@...ron.com,
	gregkh@...uxfoundation.org,
	Benjamin.Cheatham@....com,
	dave.jiang@...el.com,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: [PATCH v8 3/7] ACPI: APEI: EINJ: Add einjv2 extension struct

Add einjv2 extension struct and EINJv2 error types to prepare
the driver for EINJv2 support. ACPI specifications[1] enables
EINJv2 by extending set_error_type_with_address struct.

Link: https://uefi.org/specs/ACPI/6.6/18_Platform_Error_Interfaces.html#einjv2-extension-structure [1]

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Zaid Alali <zaidal@...amperecomputing.com>
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 drivers/acpi/apei/einj-core.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
index f018d3970de8..e74281f5044e 100644
--- a/drivers/acpi/apei/einj-core.c
+++ b/drivers/acpi/apei/einj-core.c
@@ -50,6 +50,28 @@
  */
 static int acpi5;
 
+struct syndrome_array {
+	union {
+		u8	acpi_id[16];
+		u8	device_id[16];
+		u8	pcie_sbdf[16];
+		u8	vendor_id[16];
+	} comp_id;
+	union {
+		u8	proc_synd[16];
+		u8	mem_synd[16];
+		u8	pcie_synd[16];
+		u8	vendor_synd[16];
+	} comp_synd;
+};
+
+struct einjv2_extension_struct {
+	u32 length;
+	u16 revision;
+	u16 component_arr_count;
+	struct syndrome_array component_arr[] __counted_by(component_arr_count);
+};
+
 struct set_error_type_with_address {
 	u32	type;
 	u32	vendor_extension;
@@ -58,6 +80,7 @@ struct set_error_type_with_address {
 	u64	memory_address;
 	u64	memory_address_range;
 	u32	pcie_sbdf;
+	struct	einjv2_extension_struct einjv2_struct;
 };
 enum {
 	SETWA_FLAGS_APICID = 1,
-- 
2.43.0