linux-kernel - Re: [PATCH v5 1/3] x86, mpx: add documentation on Intel MPX

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Message-ID: <530E9CD9.5040600@intel.com>
Date:	Thu, 27 Feb 2014 10:03:05 +0800
From:	Ren Qiaowei <qiaowei.ren@...el.com>
To:	"H. Peter Anvin" <hpa@...or.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>
CC:	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/3] x86, mpx: add documentation on Intel MPX

On 02/27/2014 05:44 AM, H. Peter Anvin wrote:
> On 02/26/2014 11:17 AM, Dave Hansen wrote:
>> On 02/23/2014 05:27 AM, Qiaowei Ren wrote:
>>> +Bounds Directory (BD) and Bounds Tables (BT) are stored in
>>> +application memory and are allocated by the application (in case
>>> +of kernel use, the structures will be in kernel memory). The
>>> +bound directory and each instance of bound table are in contiguous
>>> +linear memory.
>>
>> Hi Qiaowei,
>>
>> Does this mean that if userspace decided to map something in the way of
>> the bounds tables that it would break MPX?
>>
>> Also, in the description, could we s/linear/virtual/?  Linear seems to
>> be the term that Intel likes to use in its documents, but we almost
>> universally call them virtual addresses in the kernel.
>>
>
> It might be useful to clarify, though, just so noone gets confused with
> effective addresses (offsets).
>
Ok. Some words here come from some MPX public documents. I need to go 
through more carefully.

Thanks,
Qiaowei
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