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Subject: Re: [PATCH v9 5/8] arm64: Move hugetlb related definitions out of
 pgtable.h to page-defs.h
To:     Alexander Duyck <alexander.duyck@gmail.com>,
        virtio-dev@lists.oasis-open.org, kvm@vger.kernel.org,
        mst@redhat.com, catalin.marinas@arm.com, dave.hansen@intel.com,
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        osalvador@suse.de
Cc:     yang.zhang.wz@gmail.com, pagupta@redhat.com,
        konrad.wilk@oracle.com, nitesh@redhat.com, riel@surriel.com,
        lcapitulino@redhat.com, wei.w.wang@intel.com, aarcange@redhat.com,
        ying.huang@intel.com, pbonzini@redhat.com,
        dan.j.williams@intel.com, fengguang.wu@intel.com,
        alexander.h.duyck@linux.intel.com, kirill.shutemov@linux.intel.com
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From:   David Hildenbrand <david@redhat.com>
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Date:   Mon, 9 Sep 2019 10:52:06 +0200
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On 07.09.19 19:25, Alexander Duyck wrote:
> From: Alexander Duyck <alexander.h.duyck@linux.intel.com>
> 
> Move the static definition for things such as HUGETLB_PAGE_ORDER out of
> asm/pgtable.h and place it in page-defs.h. By doing this the includes
> become much easier to deal with as currently arm64 is the only architecture
> that didn't include this definition in the asm/page.h file or a file
> included by it.
> 
> It also makes logical sense as PAGE_SHIFT was already defined in
> page-defs.h so now we also have HPAGE_SHIFT defined there as well.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
> ---
>  arch/arm64/include/asm/page-def.h |    9 +++++++++
>  arch/arm64/include/asm/pgtable.h  |    9 ---------
>  2 files changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/arm64/include/asm/page-def.h b/arch/arm64/include/asm/page-def.h
> index f99d48ecbeef..1c5b079e2482 100644
> --- a/arch/arm64/include/asm/page-def.h
> +++ b/arch/arm64/include/asm/page-def.h
> @@ -20,4 +20,13 @@
>  #define CONT_SIZE		(_AC(1, UL) << (CONT_SHIFT + PAGE_SHIFT))
>  #define CONT_MASK		(~(CONT_SIZE-1))
>  
> +/*
> + * Hugetlb definitions.
> + */
> +#define HUGE_MAX_HSTATE		4
> +#define HPAGE_SHIFT		PMD_SHIFT
> +#define HPAGE_SIZE		(_AC(1, UL) << HPAGE_SHIFT)
> +#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
> +#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
> +

I wonder if you should initially limit "config PAGE_REPORTING" to x86
only and unlock it for the other targets once we actually test it there.
Or did you test PAGE_REPORTING on other architectures as well?

-- 

Thanks,

David / dhildenb