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Date:      Sat, 1 Sep 2018 23:22:14 +0200
From:      Harry Schmalzbauer <freebsd@omnilan.de>
To:        Konstantin Belousov <kostikbel@gmail.com>
Cc:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: Post r337773 EFIRT-boot-panic still happening with r337838 [Was: Re: svn commit: r337838 - head/sys/amd64/amd64]
Message-ID:  <40eab93f-6a64-92fe-15d8-c3a8c36db1a0@omnilan.de>
In-Reply-To: <20180901190129.GE2340@kib.kiev.ua>
References:  <201808151248.w7FCmnfQ012183@repo.freebsd.org> <37ef34d3-3d23-aa08-504c-c9f3c1dc8cf0@omnilan.de> <20180901190129.GE2340@kib.kiev.ua>

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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




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