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Date: Sat, 6 Feb 2016 11:23:07 +0100
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Subject: Re: [PATCH v4 01/17] Xen: ACPI: Hide UART used by Xen
From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Shannon Zhao <zhaoshenglong@huawei.com>
Cc: "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        ard.biesheuvel@linaro.org, stefano.stabellini@citrix.com,
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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.

Thanks,
Rafael