lkml.org 
[lkml]   [2013]   [Jun]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] ARM: Add support for LPAE style CONTEXTIDR
On Mon, Jun 24, 2013 at 04:15:06PM +0100, Christopher Covington wrote:
> On 06/24/2013 10:53 AM, Will Deacon wrote:
> > On Mon, Jun 24, 2013 at 03:39:09PM +0100, Christopher Covington wrote:
> >> Hi Will,
> >>
> >> On 06/24/2013 10:04 AM, Will Deacon wrote:
> >> [...]
> >>
> >>> What's the advantage of this approach, other than you get an extra byte's
> >>> worth of PID?
> >>
> >> In my view, the real advantage is that the the PID is located where people
> >> reading ARM Architecture Reference Manual are told they can find it.
> >
> > Perhaps, but I'd usually expect a debugger or trace tools to do something
> > with the PID, and they likely expect it to be shifted, so you can't really
> > win.
>
> But reading and implementing the architecture *is* winning! LOL. I'll file a
> ticket with the architecture folks and see what they think.

...aaand that came full circle :)

I think the conclusion is that Linux PID != CONTEXTIDR.PROCID, so there's no
architectural issue here. I'm just trying to keep it easy for the tools.

Will


\
 
 \ /
  Last update: 2013-06-26 19:41    [W:0.079 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site