[PATCH] ARM: NOMMU: Setup VBAR/Hivecs for secondaries cores

afzal mohammed afzal.mohd.ma at gmail.com
Wed Dec 20 19:44:49 PST 2017


Hi,

On Wed, Dec 20, 2017 at 12:22:16PM +0000, Vladimir Murzin wrote:

> >> Additionally, patch is not about Hivec only, but VBAR as well and TBH I
> >> don't follow what is your proposal...
> > 
> > i was referring to the fact that vector remapping can't be done in
> > Cortex-R, as security extension is a requisite for this feature, which
> > Cortex-R don't have on ARMv7.
> 
> For instance, just think of ARMv7A with 1:1 MMU running in SMP...

Hmm, 3 things,
1. MMU on would not take the path being patched here
2. w/ MMU on, currently it is always Hivecs
3. w/ MMU on & 1:1 mapping & due to pt. 2 above, if there is no memory
 @0xFFFF0000, suspect things might go wrong.

afzal



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