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* [Qemu-devel] TLB entry with separate addr_{read|write|code}?
@ 2010-04-16  2:49 Jun Koi
  2010-04-16  5:15 ` [Qemu-devel] " Jun Koi
  0 siblings, 1 reply; 2+ messages in thread
From: Jun Koi @ 2010-04-16  2:49 UTC (permalink / raw)
  To: qemu-devel

Hi,

In the TLB entry, why do we need to maintain separately addr_read,
addr_write and addr_code? Is it impossible to have only one for all
the purposes?

As far as I can see in tlb_set_page(), these fields are mutually
exclusive, as they either enable or get invalid value (-1).

Thanks,
Jun

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [Qemu-devel] Re: TLB entry with separate addr_{read|write|code}?
  2010-04-16  2:49 [Qemu-devel] TLB entry with separate addr_{read|write|code}? Jun Koi
@ 2010-04-16  5:15 ` Jun Koi
  0 siblings, 0 replies; 2+ messages in thread
From: Jun Koi @ 2010-04-16  5:15 UTC (permalink / raw)
  To: qemu-devel

On Fri, Apr 16, 2010 at 11:49 AM, Jun Koi <junkoi2004@gmail.com> wrote:
> Hi,
>
> In the TLB entry, why do we need to maintain separately addr_read,
> addr_write and addr_code? Is it impossible to have only one for all
> the purposes?
>
> As far as I can see in tlb_set_page(), these fields are mutually
> exclusive, as they either enable or get invalid value (-1).

Hmm I looked at the code again, and the attributes can be read, write
and execute at the same time.

Thanks,
J

^ permalink raw reply	[flat|nested] 2+ messages in thread
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2010-04-16  2:49 [Qemu-devel] TLB entry with separate addr_{read|write|code}? Jun Koi
2010-04-16  5:15 ` [Qemu-devel] " Jun Koi

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