From mboxrd@z Thu Jan  1 00:00:00 1970
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>
Cc: rjw@rjwysocki.net, lenb@kernel.org, will.deacon@arm.com, bhelgaas@google.com, thomas.lendacky@amd.com, herbert@gondor.apana.org.au, davem@davemloft.net, arnd@arndb.de, al.stone@linaro.org, linaro-acpi@lists.linaro.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, leo.duran@amd.com, hanjun.guo@linaro.org, msalter@redhat.com, grant.likely@linaro.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org

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