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From: Christoffer Dall <cdall@linaro.org>
To: Raz <raziebe@gmail.com>
Cc: kvmarm@lists.cs.columbia.edu
Subject: Re: MAIR_EL2 Attributes
Date: Tue, 24 Oct 2017 17:41:24 +0200	[thread overview]
Message-ID: <20171024154124.GA91785@lvm> (raw)
In-Reply-To: <CAPB=Z-qpezQAQ84hwpYVvqLuRczx-oMcjQvDQtH-T7u4B9YD6A@mail.gmail.com>

Hi,

On Mon, Oct 23, 2017 at 09:33:28PM +0000, Raz wrote:
> 1. According the documentation of MAIR_EL2 there are 8 attributes but
> in the code you present only 6. Why ?

I just don't think we need those other defines.

> 2. Why there are names to the attributes ? Does it make a difference if I
> assign
> an attribute index 2 or attribute index 0 in the page while the two attr
> 

I'm not entirely sure what you're asking here.

Can you try to explain what the background of your question is?

I think these defines are just the way Linux configures the page tables.


> /*
>  * Memory types available.
>  */
> #define MT_DEVICE_nGnRnE    0
> #define MT_DEVICE_nGnRE        1
> #define MT_DEVICE_GRE        2
> #define MT_NORMAL_NC        3
> #define MT_NORMAL        4
> #define MT_NORMAL_WT        5

-Christoffer

  reply	other threads:[~2017-10-24 15:40 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-23 21:33 MAIR_EL2 Attributes Raz
2017-10-24 15:41 ` Christoffer Dall [this message]
2017-10-25  6:56   ` Raz

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