linux-kernel - Re: [PATCH v3 4/4] KVM: arm64: Add support for PUD hugepages at stage 2

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Message-ID: <20180515172200.hw24lgd6qh436xvy@armageddon.cambridge.arm.com>
Date:   Tue, 15 May 2018 18:22:01 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Punit Agrawal <punit.agrawal@....com>
Cc:     kvmarm@...ts.cs.columbia.edu, suzuki.poulose@....com,
        marc.zyngier@....com, Will Deacon <will.deacon@....com>,
        christoffer.dall@....com, linux-kernel@...r.kernel.org,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 4/4] KVM: arm64: Add support for PUD hugepages at
 stage 2

On Mon, May 14, 2018 at 03:43:04PM +0100, Punit Agrawal wrote:
> KVM only supports PMD hugepages at stage 2. Extend the stage 2 fault
> handling to add support for PUD hugepages.
> 
> Addition of pud hugepage support enables additional hugepage
> sizes (e.g., 1G with 4K granule) which can be useful on cores that
> support mapping larger block sizes in the TLB entries.
> 
> Signed-off-by: Punit Agrawal <punit.agrawal@....com>
> Reviewed-by: Christoffer Dall <christoffer.dall@....com>
> Cc: Marc Zyngier <marc.zyngier@....com>
> Cc: Russell King <linux@...linux.org.uk>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will.deacon@....com>
> ---
>  arch/arm/include/asm/kvm_mmu.h         | 19 ++++++++++++
>  arch/arm64/include/asm/kvm_mmu.h       | 15 ++++++++++
>  arch/arm64/include/asm/pgtable-hwdef.h |  4 +++
>  arch/arm64/include/asm/pgtable.h       |  2 ++
>  virt/kvm/arm/mmu.c                     | 40 ++++++++++++++++++++++++--
>  5 files changed, 77 insertions(+), 3 deletions(-)

It looks like I acked an earlier version. I'll ack it again here:

Acked-by: Catalin Marinas <catalin.marinas@....com>