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

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