linux-kernel - RE: [PATCH 0/2] Fix boot hang issue on Ampere Emag server

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Date:   Tue, 7 Feb 2023 08:49:29 +0000
From:   Justin He <Justin.He@....com>
To:     Ard Biesheuvel <ardb@...nel.org>
CC:     Huacai Chen <chenhuacai@...nel.org>,
        "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alexandru Elisei <Alexandru.Elisei@....com>,
        "Jason A. Donenfeld" <Jason@...c4.com>, nd <nd@....com>
Subject: RE: [PATCH 0/2] Fix boot hang issue on Ampere Emag server



> -----Original Message-----
[..]
> > The root cause of the hung IMO might be similar to commit
> > 550b33cfd445296868a478e8413ffb2e963eed32
> > Author: Ard Biesheuvel <ardb@...nel.org>
> > Date:   Thu Nov 10 10:36:20 2022 +0100
> >
> >     arm64: efi: Force the use of SetVirtualAddressMap() on Altra
> > machines
> >
> > Do you agree with the idea if I add Ampere ”eMAG” machine into the
> > list of Using SetVirtualAddressMap() forcibly?
> >
> > Please note that even in previous kernel patch, the efibootmgr -t 10
> > will make kernel hung if I passed "efi=novamap" to the boot parameter.
> >
> 
> Interesting. What does dmidecode return for the family in the type 1 record?

# dmidecode |grep -i family
        Family: eMAG
        Family: ARMv8

The full dmidecode log is at https://pastebin.com/M3MAJtUG


--
Cheers,
Justin (Jia He)