Re: [V4 PATCH 2/6] arm64 : Introduce support for ACPI _CCA object

2015-05-20 Thread Suravee Suthikulanit 

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 msal...@redhat.com
Signed-off-by: Suravee Suthikulpanit suravee.suthikulpa...@amd.com
CC: Catalin Marinas catalin.mari...@arm.com
CC: Will Deacon will.dea...@arm.com
CC: Arnd Bergmann a...@arndb.de


Acked-by: Catalin Marinas catalin.mari...@arm.com



Thanks,

Suravee

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Re: [V4 PATCH 2/6] arm64 : Introduce support for ACPI _CCA object

2015-05-16 Thread Paul Bolle 
Just a nit regarding the commit explanation.

On Fri, 2015-05-15 at 16:23 -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.

s/ACPI_MUST_HAVE_CCA/ACPI_CCA_REQUIRED/.

Ie, update the commit explanation to match the change introduced in V2.

 In case _CCA is missing, arm64 would assign dummy_dma_ops
 to disable DMA capability of the device.

Thanks,


Paul Bolle

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