Post r337773 EFIRT-boot-panic still happening with r337838 [Was: Re: svn commit: r337838 - head/sys/amd64/amd64]

Sat Sep 1 19:01:41 UTC 2018

On Sat, Sep 01, 2018 at 08:16:15PM +0200, Harry Schmalzbauer wrote:
> I'm testing ALPHA4 on a Ivy bridge machine, without recent firmware 
> update, so no PCID.
I have no idea what is the connection between firware updates and PCID.
Ivy CPUs do have the PCID feature.

> This fix doesn't cover that hardware.
> Setting efi.rt.disabled=1 in loader.conf makes it bootable.
> 
> Without this tweak, the following panic happens:
> Fatal trap 12: Page fault while in kernel mode
> :
> cpuid = 5; apic id = 05
> :
> fault code: supervisor read data, page not present.
> :
Try https://reviews.freebsd.org/D16972