From: Suravee Suthikulanit <suravee.suthikulpanit@amd.com>
Subject: Re: [V4 PATCH 2/6] arm64 : Introduce support for ACPI _CCA object
Date: Wed, 20 May 2015 06:51:34 -0500
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To: Catalin Marinas <catalin.marinas@arm.com>
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On 5/20/2015 5:03 AM, Catalin Marinas wrote:
> 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>
>

Thanks,

Suravee