6.17-stable review patch. If anyone has any objections, please let me know.
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From: Mauro Carvalho Chehab mchehab+huawei@kernel.org
[ Upstream commit 96b010536ee020e716d28d9b359a4bcd18800aeb ]
Up to UEFI spec 2.9, the type byte of CPER struct for ARM processor 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
That actually aligns with the values already defined on older versions at N.2.4.1. Generic Processor Error Section.
Spec 2.10 also preserve the same encoding as 2.9A.
Adjust CPER and GHES handling code for both generic and ARM processors to properly handle UEFI 2.9A and 2.10 encoding.
Link: https://uefi.org/specs/UEFI/2.10/Apx_N_Common_Platform_Error_Record.html#arm... Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Reviewed-by: Jonathan Cameron Jonathan.Cameron@huawei.com Acked-by: Borislav Petkov (AMD) bp@alien8.de Signed-off-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/apei/ghes.c | 16 +++++++---- drivers/firmware/efi/cper-arm.c | 50 ++++++++++++++++----------------- include/linux/cper.h | 10 +++---- 3 files changed, 39 insertions(+), 37 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 7fca0ede9ecc0..307dc7f62e525 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -22,6 +22,7 @@ #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/acpi.h> +#include <linux/bitfield.h> #include <linux/io.h> #include <linux/interrupt.h> #include <linux/timer.h> @@ -556,6 +557,7 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, { struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata); int flags = sync ? MF_ACTION_REQUIRED : 0; + char error_type[120]; bool queued = false; int sec_sev, i; char *p; @@ -568,9 +570,8 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, p = (char *)(err + 1); for (i = 0; i < err->err_info_num; i++) { struct cper_arm_err_info *err_info = (struct cper_arm_err_info *)p; - bool is_cache = (err_info->type == CPER_ARM_CACHE_ERROR); + bool is_cache = err_info->type & CPER_ARM_CACHE_ERROR; bool has_pa = (err_info->validation_bits & CPER_ARM_INFO_VALID_PHYSICAL_ADDR); - const char *error_type = "unknown error";
/* * The field (err_info->error_info & BIT(26)) is fixed to set to @@ -584,12 +585,15 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, continue; }
- if (err_info->type < ARRAY_SIZE(cper_proc_error_type_strs)) - error_type = cper_proc_error_type_strs[err_info->type]; + cper_bits_to_str(error_type, sizeof(error_type), + FIELD_GET(CPER_ARM_ERR_TYPE_MASK, err_info->type), + cper_proc_error_type_strs, + ARRAY_SIZE(cper_proc_error_type_strs));
pr_warn_ratelimited(FW_WARN GHES_PFX - "Unhandled processor error type: %s\n", - error_type); + "Unhandled processor error type 0x%02x: %s%s\n", + err_info->type, error_type, + (err_info->type & ~CPER_ARM_ERR_TYPE_MASK) ? " with reserved bit(s)" : ""); p += err_info->length; }
diff --git a/drivers/firmware/efi/cper-arm.c b/drivers/firmware/efi/cper-arm.c index 6ff781e47147c..76542a53e2027 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, operation type: %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, operation type: %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, operation type: %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) { @@ -241,6 +232,7 @@ void cper_print_proc_arm(const char *pfx, struct cper_arm_err_info *err_info; struct cper_arm_ctx_info *ctx_info; char newpfx[64], infopfx[ARRAY_SIZE(newpfx) + 1]; + char error_type[120];
printk("%sMIDR: 0x%016llx\n", pfx, proc->midr);
@@ -289,9 +281,15 @@ void cper_print_proc_arm(const char *pfx, newpfx); }
- printk("%serror_type: %d, %s\n", newpfx, err_info->type, - err_info->type < ARRAY_SIZE(cper_proc_error_type_strs) ? - cper_proc_error_type_strs[err_info->type] : "unknown"); + cper_bits_to_str(error_type, sizeof(error_type), + FIELD_GET(CPER_ARM_ERR_TYPE_MASK, err_info->type), + cper_proc_error_type_strs, + ARRAY_SIZE(cper_proc_error_type_strs)); + + printk("%serror_type: 0x%02x: %s%s\n", newpfx, err_info->type, + error_type, + (err_info->type & ~CPER_ARM_ERR_TYPE_MASK) ? " with reserved bit(s)" : ""); + if (err_info->validation_bits & CPER_ARM_INFO_VALID_ERR_INFO) { printk("%serror_info: 0x%016llx\n", newpfx, err_info->error_info); diff --git a/include/linux/cper.h b/include/linux/cper.h index 58f40477c824e..5b1236d8c65bb 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -297,11 +297,11 @@ 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_ERR_TYPE_MASK GENMASK(4,1) +#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)