re: port-amd64/58410: x86_patch() panic with core ultra processor

[matthew green <mrg%eterna23.net@localhost>]

how did you get a core ultra!  i've been trying to buy one since
i heard about them at the start of the year ;)

>   panic: kernel diagnostic assertion "rcr4() & CR4_SMAP" failed: file "/usr/src/sys/arch/x86/x86/patch.c", line 356
>   trap type 1 code 0 rip 0xffffffff8023415 cs 0x8 rflags 0x202 cr2 0 ilevel 0 rsp 0xffffffff81cd8dc0

can you poke around the bios menus and look for something about
this?  it might be called something protection -- it's basically
a feature where user mappings aren't visible to kernel mappings
by default, kinda like real CPUs that have entirely separate
address spaces for kernel and user spaces, and require special
setup to read/write from user addresses.


.mrg.