re: panic with AMD EPYC 7313P on 10.0_BETA

[matthew green <mrg%eterna.com.au@localhost>]

Mark Davies writes:
> Trying to boot a Dell Power Edge R6515 that has an AMD EPYC 7313P  with 
> 10.0_BETA from a couple of day ago panics with:
>
>
> panic: kernel diagnostic assertion "rcr4() & CR4_SMAP" failed: file 
> "...sys/arch/x86/x86/patch.c"
>
> backtrace of:
>     vpanic()
>     kern_assert()
>     x86_patch()
>     cpu_boot_secondary_processors()
>     main()
>
> Any suggestions what's going on and how to fix?

perhaps there's a bios setting you have to enable?

i've seen this before, and i just #if 0'd the panic since
i didn't have time to think about it then.

at worst, #if 0 will work around if while missing out on
some modern security features.


.mrg.