From: Anshuman Khandual <anshuman.khandual@arm.com>
To: Gavin Shan <gshan@redhat.com>, linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, catalin.marinas@arm.com,
will@kernel.org, shan.gavin@gmail.com
Subject: Re: [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT
Date: Thu, 10 Sep 2020 11:47:14 +0530 [thread overview]
Message-ID: <459d0f64-fea9-a060-91a5-17a37834fb1b@arm.com> (raw)
In-Reply-To: <20200908071931.47767-2-gshan@redhat.com>
On 09/08/2020 12:49 PM, Gavin Shan wrote:
> The macro CONT_PTE_SHIFT actually depends on CONT_SHIFT, which has
> been defined in page-def.h, based on CONFIG_ARM64_CONT_SHIFT. Lets
> reflect the dependency.
>
> Signed-off-by: Gavin Shan <gshan@redhat.com>
> ---
> arch/arm64/include/asm/pgtable-hwdef.h | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
> index 8a399e666837..0bd9469f4323 100644
> --- a/arch/arm64/include/asm/pgtable-hwdef.h
> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
> @@ -81,14 +81,12 @@
> /*
> * Contiguous page definitions.
> */
> +#define CONT_PTE_SHIFT (CONT_SHIFT + PAGE_SHIFT)
> #ifdef CONFIG_ARM64_64K_PAGES
> -#define CONT_PTE_SHIFT (5 + PAGE_SHIFT)
> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
> #elif defined(CONFIG_ARM64_16K_PAGES)
> -#define CONT_PTE_SHIFT (7 + PAGE_SHIFT)
> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
> #else
> -#define CONT_PTE_SHIFT (4 + PAGE_SHIFT)
> #define CONT_PMD_SHIFT (4 + PMD_SHIFT)
> #endif
Could not a similar CONT_PMD be created from a new CONFIG_ARM64_CONT_PMD
config option, which would help unify CONT_PMD_SHIFT here as well ?
next prev parent reply other threads:[~2020-09-10 6:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-08 7:19 [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Gavin Shan
2020-09-08 7:19 ` [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT Gavin Shan
2020-09-10 6:17 ` Anshuman Khandual [this message]
2020-09-10 8:31 ` Gavin Shan
2020-09-10 9:28 ` Anshuman Khandual
2020-09-10 9:56 ` Gavin Shan
2020-09-10 5:59 ` [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Anshuman Khandual
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