linux-kernel - Re: [PATCH] KVM: arm64: Drop PTE_S2_MEMATTR

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Message-ID: <20200416163605.091fa6eb@why>
Date:   Thu, 16 Apr 2020 16:36:05 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Zenghui Yu <yuzenghui@...wei.com>
Cc:     <kvmarm@...ts.cs.columbia.edu>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <catalin.marinas@....com>,
        <will@...nel.org>, <wanghaibin.wang@...wei.com>
Subject: Re: [PATCH] KVM: arm64: Drop PTE_S2_MEMATTR_MASK

On Wed, 15 Apr 2020 18:57:46 +0800
Zenghui Yu <yuzenghui@...wei.com> wrote:

> The only user of PTE_S2_MEMATTR_MASK macro had been removed since
> commit a501e32430d4 ("arm64: Clean up the default pgprot setting").
> It has been about six years and no one has used it again.
> 
> Let's drop it.
> 
> Signed-off-by: Zenghui Yu <yuzenghui@...wei.com>
> ---
>  arch/arm64/include/asm/pgtable-hwdef.h | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
> index 6bf5e650da78..99315bdca0e6 100644
> --- a/arch/arm64/include/asm/pgtable-hwdef.h
> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
> @@ -190,7 +190,6 @@
>   * Memory Attribute override for Stage-2 (MemAttr[3:0])
>   */
>  #define PTE_S2_MEMATTR(t)	(_AT(pteval_t, (t)) << 2)
> -#define PTE_S2_MEMATTR_MASK	(_AT(pteval_t, 0xf) << 2)
>  
>  /*
>   * EL2/HYP PTE/PMD definitions

Looks good to me. Catalin, Will: do you want to take this directly? If
so please add my:

Acked-by: Marc Zyngier <maz@...nel.org>

Otherwise, I'll route it via the KVM tree.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...