From: Will Deacon <will.deacon@arm.com>
To: Robin Murphy <robin.murphy@arm.com>, akpm@linux-foundation.org
Cc: catalin.marinas@arm.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Subject: Re: [PATCH v3.1 4/4] arm64: mm: Implement pte_devmap support
Date: Wed, 29 May 2019 11:03:38 +0100 [thread overview]
Message-ID: <20190529100338.GB4485@fuggles.cambridge.arm.com> (raw)
In-Reply-To: <13026c4e64abc17133bbfa07d7731ec6691c0bcd.1559050949.git.robin.murphy@arm.com>
On Tue, May 28, 2019 at 02:46:59PM +0100, Robin Murphy wrote:
> In order for things like get_user_pages() to work on ZONE_DEVICE memory,
> we need a software PTE bit to identify device-backed PFNs. Hook this up
> along with the relevant helpers to join in with ARCH_HAS_PTE_DEVMAP.
>
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
>
> Fix to build correctly under all combinations of
> CONFIG_PGTABLE_LEVELS and CONFIG_TRANSPARENT_HUGEPAGE.
>
> arch/arm64/Kconfig | 1 +
> arch/arm64/include/asm/pgtable-prot.h | 1 +
> arch/arm64/include/asm/pgtable.h | 21 +++++++++++++++++++++
> 3 files changed, 23 insertions(+)
Acked-by: Will Deacon <will.deacon@arm.com>
Andrew -- please can you update the previous version of this patch, which
I think you picked up?
Thanks,
Will
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next prev parent reply other threads:[~2019-05-29 10:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-23 15:03 [PATCH v3 0/4] Devmap cleanups + arm64 support Robin Murphy
2019-05-23 15:03 ` [PATCH v3 1/4] mm/memremap: Rename and consolidate SECTION_SIZE Robin Murphy
2019-05-23 15:03 ` [PATCH v3 2/4] mm: clean up is_device_*_page() definitions Robin Murphy
2019-05-23 15:03 ` [PATCH v3 3/4] mm: introduce ARCH_HAS_PTE_DEVMAP Robin Murphy
2019-05-23 15:03 ` [PATCH v3 4/4] arm64: mm: Implement pte_devmap support Robin Murphy
2019-05-24 18:08 ` Will Deacon
2019-05-24 18:38 ` Robin Murphy
2019-05-27 6:23 ` Anshuman Khandual
2019-05-28 13:46 ` [PATCH v3.1 " Robin Murphy
2019-05-29 10:03 ` Will Deacon [this message]
2019-06-26 7:35 ` [PATCH v3 0/4] Devmap cleanups + arm64 support Christoph Hellwig
2019-06-26 12:31 ` Mark Rutland
2019-06-26 15:38 ` Christoph Hellwig
2019-06-26 15:45 ` Jason Gunthorpe
2019-06-27 3:35 ` Andrew Morton
2019-07-04 18:53 ` Andrew Morton
2019-07-04 19:59 ` Jason Gunthorpe
2019-07-04 20:53 ` Andrew Morton
2019-07-04 21:28 ` Jason Gunthorpe
2019-07-05 15:47 ` Jason Gunthorpe
2019-07-04 20:54 ` Robin Murphy
2019-07-04 21:13 ` Andrew Morton
2019-07-05 11:16 ` Robin Murphy
2019-07-04 23:37 ` Dan Williams
2019-07-05 12:32 ` Jason Gunthorpe
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