linux-kernel - Re: [PATCH] ACPI, APEI: Fix BERT resources conflict with ACPI NVS area

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Message-ID: <8737fdaca7.fsf@yhuang-dev.intel.com>
Date:   Fri, 17 Feb 2017 08:31:12 +0800
From:   "Huang\, Ying" <ying.huang@...el.com>
To:     Borislav Petkov <bp@...e.de>
Cc:     "Huang\, Ying" <ying.huang@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Tomasz Nowicki <tomasz.nowicki@...aro.org>,
        Tony Luck <tony.luck@...el.com>, Fu Wei <fu.wei@...aro.org>,
        <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI, APEI: Fix BERT resources conflict with ACPI NVS area

Borislav Petkov <bp@...e.de> writes:

> On Thu, Feb 16, 2017 at 06:24:39PM +0800, Huang, Ying wrote:
>> The NVS area is excluded when request the resources, because the NVS
>> area has been marked as busy already.  But the whole BERT memory area is
>> mapped, so we can read from it.
>
> So you're saying the NVS area is part of the BERT area and we can access
> the whole range?

I am not sure whether the NVS area is a part of the BERT area, but
apparently they are overlapped in some way.  We will access the whole
BERT area here via ioremap the whole range.

Best Regards,
Huang, Ying