linux-kernel - Re: [PATCH] x86: add phys addr validity check for /dev/mem mmap

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Message-ID: <515D0DB7.7000001@gmail.com>
Date:	Thu, 04 Apr 2013 13:20:55 +0800
From:	Simon Jeons <simon.jeons@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Frantisek Hrbata <fhrbata@...hat.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	tglx@...utronix.de, mingo@...hat.com, x86@...nel.org,
	oleg@...hat.com, kamaleshb@...ibm.com, hechjie@...ibm.com
Subject: Re: [PATCH] x86: add phys addr validity check for /dev/mem mmap

Hi H.Peter,
On 04/04/2013 09:32 AM, H. Peter Anvin wrote:
> On 04/03/2013 06:17 PM, Simon Jeons wrote:
>> e820 also contain mmio, correct?
> No.

How to check which address is used by mmio? /proc/iomem, correct?

>
>> So cpu should not access address beyond
>> e820 map(RAM+MMIO).
> No.
>
> 	-hpa
>
>

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