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

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Date:	Wed, 03 Apr 2013 18:32:13 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Simon Jeons <simon.jeons@...il.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

On 04/03/2013 06:17 PM, Simon Jeons wrote:
> 
> e820 also contain mmio, correct?

No.

> So cpu should not access address beyond
> e820 map(RAM+MMIO).

No.

	-hpa


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