linux-kernel - Re: [PATCH 11/12] powerpc: wiiu: don't enforce flat memory

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Message-ID: <20220908153511.57ceunyusziqfcav@pali>
Date:   Thu, 8 Sep 2022 17:35:11 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     Ash Logan <ash@...quark.com>,
        "paulus@...ba.org" <paulus@...ba.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "benh@...nel.crashing.org" <benh@...nel.crashing.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "j.ne@...teo.net" <j.ne@...teo.net>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 11/12] powerpc: wiiu: don't enforce flat memory

On Thursday 08 September 2022 15:25:14 Christophe Leroy wrote:
> Le 08/08/2022 à 20:40, Pali Rohár a écrit :
> > On Friday 10 June 2022 00:24:20 Pali Rohár wrote:
> >> On Friday 20 May 2022 14:30:02 Pali Rohár wrote:
> >>> + linux-mm
> >>>
> >>> Do you know what are requirements for kernel to support non-contiguous
> >>> memory support and what is needed to enable it for 32-bit powerpc?
> >>
> >> Any hints?
> > 
> > PING?
> > 
> 
> The tree following patches landed in powerpc/next branch, so they should 
> soon be visible in linux-next too:
> 
> fc06755e2562 ("powerpc/32: Drop a stale comment about reservation of 
> gigantic pages")
> b0e0d68b1c52 ("powerpc/32: Allow fragmented physical memory")
> 0115953dcebe ("powerpc/32: Remove wii_memory_fixups()")

Ou, nice! I will try to test it if it allows me to access more than 2GB
of RAM from 4GB DDR3 module with 32-bit addressing mode on P2020 CPU.