Register MC EDAC with Linux EDAC subsystem

minersrevolt — Fri, 24 May 2024 17:05:26 GMT

I have an S32G-VNP-EVB3 board running Linux using the NXP provided BSP 40. I have enabled the EDAC system in the Linux kernel to montior sbes and dbes however I do not see it in the filesystem. Makes me wonder if EDAC is actually enabled on this board? The amount of available memory seems to indicate that it is; though I could not find the memory node in the device tree to double check. Any way for me to be sure?

Expect to see edac information here,

/sys/devices/system/edac/mc # ls power subsystem uevent

System memory,

/sys/devices/system/edac/mc # cat /proc/meminfo MemTotal: 3500312 kB MemFree: 3442776 kB MemAvailable: 3442020 kB Buffers: 1724 kB Cached: 9168 kB SwapCached: 0 kB Active: 7532 kB Inactive: 3924 kB Active(anon): 64 kB Inactive(anon): 640 kB Active(file): 7468 kB Inactive(file): 3284 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 24 kB Writeback: 0 kB AnonPages: 724 kB Mapped: 2116 kB Shmem: 60 kB KReclaimable: 25168 kB Slab: 33908 kB SReclaimable: 25168 kB SUnreclaim: 8740 kB KernelStack: 1376 kB PageTables: 192 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 1750156 kB Committed_AS: 2520 kB VmallocTotal: 259653632 kB VmallocUsed: 1872 kB VmallocChunk: 0 kB Percpu: 656 kB CmaTotal: 262144 kB CmaFree: 260576 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Hugetlb: 0 kB

Re: Register MC EDAC with Linux EDAC subsystem

minersrevolt — Sat, 25 May 2024 00:22:46 GMT

Is it because this board used inline dram which means the scrubber is obfuscating the results from the MC so the ARMs just dont have access to this information?

Re: Register MC EDAC with Linux EDAC subsystem

chenyin_h — Tue, 28 May 2024 02:36:38 GMT

Hello, @minersrevolt

From BSP perspective, it does not support EDAC at DDR level.

Sorry for your inconvenience.

Best Regards

Chenyin

S32G中的主题 Re: Register MC EDAC with Linux EDAC subsystem

Register MC EDAC with Linux EDAC subsystem

Re: Register MC EDAC with Linux EDAC subsystem

Re: Register MC EDAC with Linux EDAC subsystem