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Date: Mon, 8 Feb 2016 10:57:01 +0000
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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To: "Rafael J. Wysocki" <rafael@kernel.org>
CC: Shannon Zhao <zhaoshenglong@huawei.com>,
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Subject: Re: [PATCH v4 01/17] Xen: ACPI: Hide UART used by Xen
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On Sat, 6 Feb 2016, Rafael J. Wysocki wrote:
> On Fri, Feb 5, 2016 at 4:05 AM, Shannon Zhao <zhaoshenglong@huawei.com> wrote:
> > From: Shannon Zhao <shannon.zhao@linaro.org>
> >
> > 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 <shannon.zhao@linaro.org>
> > Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> 
> 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?