Hello all, Description of problem: The existing Common Platform Error Record (CPER) memory error format can't fully support 32GiB and 64GiB DIMMs. The UEFI spec has changed to use previously reserved bits in the record provide that support. Kernel processing of CPER memory error records will need to change to reflect the new spec. N.2.5 Memory Error Section Bits <18:21> was set as 'reserved', and now is used as 'extended'. http://www.uefi.org/sites/default/files/resources/2_4_Errata_A.pdf Matt Fleming mentioned to me that Tony Luck recently fixed a compatibility issue with Memory Error Record structure. I ask, how do we want to handle the processing of a CPER memory error record with support for larger DIMMs? -Nigel From: Nigel Croxon <nigel.croxon@xxxxxxx> Date: Tue, 13 Oct 2015 15:21:19 -0400 Subject: [PATCH] CPER: support 32GiB 64GiB DIMMs Description of problem: The existing Common Platform Error Record (CPER) memory error format can't fully support 32GiB and 64GiB DIMMs. The UEFI spec has changed to use previously reserved bits in the record provide that support. Kernel processing of CPER memory error records will need to change to reflect the new spec. UEFI 2.4 Errata A - December, 2013 N.2.5 Memory Error Section Bits <18:21> was set as 'reserved'. Now used as 'extended'. Signed-off-by: Nigel Croxon <nigel.croxon@xxxxxxx> --- include/linux/cper.h | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/include/linux/cper.h b/include/linux/cper.h index dcacb1a..4ece589 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -243,6 +243,10 @@ enum { #define CPER_MEM_VALID_RANK_NUMBER 0x8000 #define CPER_MEM_VALID_CARD_HANDLE 0x10000 #define CPER_MEM_VALID_MODULE_HANDLE 0x20000 +#define CPER_MEM_VALID_EXT_ROW_B16_17 0x40000 +#define CPER_MEM_VALID_BANK_GROUP 0x80000 +#define CPER_MEM_VALID_BANK_ADDRESS 0x100000 +#define CPER_MEM_VALID_CHIP_ID 0x200000 #define CPER_PCIE_VALID_PORT_TYPE 0x0001 #define CPER_PCIE_VALID_VERSION 0x0002 @@ -378,7 +382,7 @@ struct cper_sec_mem_err { __u64 responder_id; __u64 target_id; __u8 error_type; - __u8 reserved; + __u8 extended; __u16 rank; __u16 mem_array_handle; /* card handle in UEFI 2.4 */ __u16 mem_dev_handle; /* module handle in UEFI 2.4 */ -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
