On Fri, Aug 14, 2015 at 09:12:28AM -0500, Jeremy Linton wrote:

Hello Suravee,

On 08/13/2015 08:45 PM, Suravee Suthikulpanit wrote:

quoted

On 8/13/15 04:51, Jeremy Linton wrote:

quoted

ACPI configurations can now mark devices as noncoherent,
support that choice.

This change was in my earlier revisions for the original patch series to
add ACPI CCA support. At the time, this was pushed back since we were
not sure whether this would be a useful case, and whether such hardware
exists.

Yes, I was made aware of that conversation during the review here.

Basically, the ARM Juno development platform has a mix of coherent and 
noncoherent devices. The EHCI being one of the primary noncoherent 
peripherals. Without which, the usefulness of the platform for 
developing with an ACPI kernel is limited.

Tesed-by: Huang Shijie [off-list ref]