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Date: Wed, 20 May 2015 11:03:04 +0100
From: Catalin Marinas <catalin.marinas@arm.com>
To: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: rjw@rjwysocki.net, lenb@kernel.org, will.deacon@arm.com,
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Subject: Re: [V4 PATCH 2/6] arm64 : Introduce support for ACPI _CCA object
Message-ID: <20150520100304.GE25313@e104818-lin.cambridge.arm.com>
References: <1431724994-21601-1-git-send-email-Suravee.Suthikulpanit@amd.com>
 <1431724994-21601-3-git-send-email-Suravee.Suthikulpanit@amd.com>
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On Fri, May 15, 2015 at 04:23:10PM -0500, Suravee Suthikulpanit wrote:
> From http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf,
> section 6.2.17 _CCA states that ARM platforms require ACPI _CCA
> object to be specified for DMA-cabpable devices. This patch introduces
> ACPI_MUST_HAVE_CCA in arm64 Kconfig to specify such requirement.
> 
> In case _CCA is missing, arm64 would assign dummy_dma_ops
> to disable DMA capability of the device.
> 
> Signed-off-by: Mark Salter <msalter@redhat.com>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
> CC: Catalin Marinas <catalin.marinas@arm.com>
> CC: Will Deacon <will.deacon@arm.com>
> CC: Arnd Bergmann <arnd@arndb.de>

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