linux-kernel - [PATCH v10 3/7] ACPI: APEI: EINJ: Add einjv2 extension struct

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Message-ID: <20250617193026.637510-4-zaidal@os.amperecomputing.com>
Date: Tue, 17 Jun 2025 12:30:22 -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,
	ira.weiny@...el.com,
	Jonathan.Cameron@...wei.com,
	viro@...iv.linux.org.uk,
	sudeep.holla@....com,
	dan.carpenter@...aro.org,
	jonathanh@...dia.com,
	sthanneeru.opensrc@...ron.com,
	gregkh@...uxfoundation.org,
	peterz@...radead.org,
	dan.j.williams@...el.com,
	dave.jiang@...el.com,
	benjamin.cheatham@....com,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: [PATCH v10 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>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Zaid Alali <zaidal@...amperecomputing.com>
---
 drivers/acpi/apei/einj-core.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
index a1ff42c226fb..1ffe8270634c 100644
--- a/drivers/acpi/apei/einj-core.c
+++ b/drivers/acpi/apei/einj-core.c
@@ -33,6 +33,7 @@
 #define SLEEP_UNIT_MAX		5000			/* 5ms */
 /* Firmware should respond within 1 seconds */
 #define FIRMWARE_TIMEOUT	(1 * USEC_PER_SEC)
+#define COMPONENT_LEN		16
 #define ACPI65_EINJV2_SUPP	BIT(30)
 #define ACPI5_VENDOR_BIT	BIT(31)
 #define MEM_ERROR_MASK		(ACPI_EINJ_MEMORY_CORRECTABLE | \
@@ -50,6 +51,28 @@
  */
 static int acpi5;
 
+struct syndrome_array {
+	union {
+		u8	acpi_id[COMPONENT_LEN];
+		u8	device_id[COMPONENT_LEN];
+		u8	pcie_sbdf[COMPONENT_LEN];
+		u8	vendor_id[COMPONENT_LEN];
+	} comp_id;
+	union {
+		u8	proc_synd[COMPONENT_LEN];
+		u8	mem_synd[COMPONENT_LEN];
+		u8	pcie_synd[COMPONENT_LEN];
+		u8	vendor_synd[COMPONENT_LEN];
+	} 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 +81,7 @@ 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