On Sat, 6 Feb 2016, Rafael J. Wysocki wrote:

On Fri, Feb 5, 2016 at 4:05 AM, Shannon Zhao [off-list ref] wrote:

quoted

From: Shannon Zhao <redacted>

ACPI 6.0 introduces a new table STAO to list the devices which are used
by Xen and can't be used by Dom0. On Xen virtual platforms, the physical
UART is used by Xen. So here it hides UART from Dom0.

Signed-off-by: Shannon Zhao <redacted>
Reviewed-by: Stefano Stabellini <redacted>

Well, this doesn't look right to me.

We need to find a nicer way to achieve what you want.

I take that you are talking about how to honor the STAO table in Linux.
Do you have any concrete suggestions?