Re: [GIT PULL] EDAC pile for 5.4 -> AMD family 17h, model 70h support

[Borislav Petkov <bp@alien8.de>]

On Tue, Oct 08, 2019 at 07:08:20PM -0400, Jeff God wrote:
> I also wanted to apologise for the text emails line wrapping, I
> haven't found a viable email client alternative...

https://www.kernel.org/doc/html/latest/process/email-clients.html

> I did not see anything in dmesg, and all status files remained 0
> (except flag which was hw)

Nothing here either but my machine is

vendor_id       : AuthenticAMD
cpu family      : 23
model           : 1
model name      : AMD EPYC 7251 8-Core Processor
stepping        : 2

so I'm guessing it needs something else for injection to work on those
models...

> The memory controller banks are 17 (channel 0) and 18 (channel 1) on Family
> 17h Model 7Xh, and these are managed by CPU 0.

Btw, Yazen, we probably need to have an easy way to find out
how the bank mapping is now on SMCA machine when wanting to do
injection. I know we talked about having some of that info in
/sys/devices/system/machinecheck/machinecheckX...

> And even this:
> [  609.681714] mce: [Hardware Error]: Machine check events logged
> [  609.681716] [Hardware Error]: Corrected error, no action required.
> [  609.681720] [Hardware Error]: CPU:0 (17:71:0)
> MC17_STATUS[-|CE|MiscV|AddrV|-|SyndV|CECC|-|-|Scrub]:
> 0x9c2041000000011b
> [  609.681723] [Hardware Error]: Error Addr: 0x000000006d3d483b
> [  609.681724] [Hardware Error]: IPID: 0x0000000000000000, Syndrome:
> 0x0000000000000000
> [  609.681726] [Hardware Error]: Unified Memory Controller Ext. Error
> Code: 0, DRAM ECC error.
> [  609.681743] ------------[ cut here ]------------
> [  609.681748] WARNING: CPU: 4 PID: 2447 at
> drivers/edac/edac_mc.c:1238 edac_mc_handle_error+0x5a6/0x6d0

You can ignore that for now. That's a sanity-check for a driver supplying a 0
for grain.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette