linux-kernel - Re: [PATCH v2 0/1] arm/arm64: add support for folded p4d page tables

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Message-ID: <20200123115904.GA10436@hump.haifa.ibm.com>
Date:   Thu, 23 Jan 2020 13:59:04 +0200
From:   Mike Rapoport <rppt@...nel.org>
To:     Will Deacon <will@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Anshuman Khandual <anshuman.khandual@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Marc Zyngier <maz@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        kvmarm@...ts.cs.columbia.edu, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...ux.ibm.com>
Subject: Re: [PATCH v2 0/1] arm/arm64: add support for folded p4d page tables

On Wed, Jan 22, 2020 at 06:50:17PM +0000, Will Deacon wrote:
> On Mon, Jan 13, 2020 at 01:13:22PM +0200, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@...ux.ibm.com>
> > 
> > This is a part of clean up of the page table manipulation code that aims to
> > remove asm-generic/5level-fixup.h and asm-generic/pgtable-nop4d-hack.h
> > 
> > There is a single patch for both arm and arm64 because doing the conversion
> > separately would mean breaking the shared mmu bits in virt/kvm/arm.
> 
> Unfortunately, that's going to be really hard to merge, as the two
> architectures are maintained in different trees and the breadth of this
> patch series is likely to lead to conflicts in both.

I anyway realized that sending these changes arch-by-arch was not so bright
idea, so my intention is to make "v2" include all the changes required to
drop asm-generic/5level-fixup.h and merge it via the -mm tree.
 
> Will

-- 
Sincerely yours,
Mike.