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

[Harry Schmalzbauer]

Am 01.09.2018 um 21:01 schrieb Konstantin Belousov:
> 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.

Sorry, I confused it with INVPCID which is nonsense too.
IBPB was firmware related, but this is completely different to this EFIRT...
Ignore please.



>> 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

Panic vanished, boots fine with D16972-47525, nothing more checked.

Thanks a lot,

-harry