* [RFC] efi/cper: align ARM CPER type with UEFI 2.9A/2.10 specs
@ 2024-06-19 8:45 Mauro Carvalho Chehab
0 siblings, 0 replies; only message in thread
From: Mauro Carvalho Chehab @ 2024-06-19 8:45 UTC (permalink / raw
Cc: Mauro Carvalho Chehab, Alison Schofield, Ard Biesheuvel,
Dave Jiang, Ira Weiny, Borislav Petkov, Tony Luck, James Morse,
Jonathan Cameron, Shiju Jose, linux-efi, linux-kernel, linux-edac
Up to UEFI 2.9 spec, the type byte of CPER struct was defined simply
as type at byte offset 4:
- Cache error
- TLB Error
- Bus Error
- Micro-architectural Error
All other values are reserved
Yet, there was no information about how this would be encoded.
Spec 2.9A errata corrected it by defining:
- Bit 1 - Cache Error
- Bit 2 - TLB Error
- Bit 3 - Bus Error
- Bit 4 - Micro-architectural Error
All other values are reserved
Spec 2.10 also preserve the same encoding as 2.9A
See: https://uefi.org/specs/UEFI/2.10/Apx_N_Common_Platform_Error_Record.html#arm-processor-error-information
Adjust CPER handling code for ARM to properly handle UEFI 2.9A and
2.10 encoding.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
drivers/firmware/efi/cper-arm.c | 37 +++++++++++++--------------------
include/linux/cper.h | 9 ++++----
2 files changed, 18 insertions(+), 28 deletions(-)
diff --git a/drivers/firmware/efi/cper-arm.c b/drivers/firmware/efi/cper-arm.c
index fa9c1c3bf168..17b84ffa61d2 100644
--- a/drivers/firmware/efi/cper-arm.c
+++ b/drivers/firmware/efi/cper-arm.c
@@ -93,15 +93,11 @@ static void cper_print_arm_err_info(const char *pfx, u32 type,
bool proc_context_corrupt, corrected, precise_pc, restartable_pc;
bool time_out, access_mode;
- /* If the type is unknown, bail. */
- if (type > CPER_ARM_MAX_TYPE)
- return;
-
/*
* Vendor type errors have error information values that are vendor
* specific.
*/
- if (type == CPER_ARM_VENDOR_ERROR)
+ if (type & CPER_ARM_VENDOR_ERROR)
return;
if (error_info & CPER_ARM_ERR_VALID_TRANSACTION_TYPE) {
@@ -116,43 +112,38 @@ static void cper_print_arm_err_info(const char *pfx, u32 type,
if (error_info & CPER_ARM_ERR_VALID_OPERATION_TYPE) {
op_type = ((error_info >> CPER_ARM_ERR_OPERATION_SHIFT)
& CPER_ARM_ERR_OPERATION_MASK);
- switch (type) {
- case CPER_ARM_CACHE_ERROR:
+ if (type & CPER_ARM_CACHE_ERROR) {
if (op_type < ARRAY_SIZE(arm_cache_err_op_strs)) {
- printk("%soperation type: %s\n", pfx,
+ printk("%scache error: %s\n", pfx,
arm_cache_err_op_strs[op_type]);
}
- break;
- case CPER_ARM_TLB_ERROR:
+ }
+ if (type & CPER_ARM_TLB_ERROR) {
if (op_type < ARRAY_SIZE(arm_tlb_err_op_strs)) {
- printk("%soperation type: %s\n", pfx,
+ printk("%sTLB error: %s\n", pfx,
arm_tlb_err_op_strs[op_type]);
}
- break;
- case CPER_ARM_BUS_ERROR:
+ }
+ if (type & CPER_ARM_BUS_ERROR) {
if (op_type < ARRAY_SIZE(arm_bus_err_op_strs)) {
- printk("%soperation type: %s\n", pfx,
+ printk("%sbus error: %s\n", pfx,
arm_bus_err_op_strs[op_type]);
}
- break;
}
}
if (error_info & CPER_ARM_ERR_VALID_LEVEL) {
level = ((error_info >> CPER_ARM_ERR_LEVEL_SHIFT)
& CPER_ARM_ERR_LEVEL_MASK);
- switch (type) {
- case CPER_ARM_CACHE_ERROR:
+ if (type & CPER_ARM_CACHE_ERROR)
printk("%scache level: %d\n", pfx, level);
- break;
- case CPER_ARM_TLB_ERROR:
+
+ if (type & CPER_ARM_TLB_ERROR)
printk("%sTLB level: %d\n", pfx, level);
- break;
- case CPER_ARM_BUS_ERROR:
+
+ if (type & CPER_ARM_BUS_ERROR)
printk("%saffinity level at which the bus error occurred: %d\n",
pfx, level);
- break;
- }
}
if (error_info & CPER_ARM_ERR_VALID_PROC_CONTEXT_CORRUPT) {
diff --git a/include/linux/cper.h b/include/linux/cper.h
index 265b0f8fc0b3..afc6d41b4e67 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -293,11 +293,10 @@ enum {
#define CPER_ARM_INFO_FLAGS_PROPAGATED BIT(2)
#define CPER_ARM_INFO_FLAGS_OVERFLOW BIT(3)
-#define CPER_ARM_CACHE_ERROR 0
-#define CPER_ARM_TLB_ERROR 1
-#define CPER_ARM_BUS_ERROR 2
-#define CPER_ARM_VENDOR_ERROR 3
-#define CPER_ARM_MAX_TYPE CPER_ARM_VENDOR_ERROR
+#define CPER_ARM_CACHE_ERROR BIT(1)
+#define CPER_ARM_TLB_ERROR BIT(2)
+#define CPER_ARM_BUS_ERROR BIT(3)
+#define CPER_ARM_VENDOR_ERROR BIT(4)
#define CPER_ARM_ERR_VALID_TRANSACTION_TYPE BIT(0)
#define CPER_ARM_ERR_VALID_OPERATION_TYPE BIT(1)
--
2.45.2
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2024-06-19 8:45 [RFC] efi/cper: align ARM CPER type with UEFI 2.9A/2.10 specs Mauro Carvalho Chehab
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