From: afzal.mohd.ma@gmail.com (afzal mohammed)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: NOMMU: Setup VBAR/Hivecs for secondaries cores
Date: Thu, 21 Dec 2017 09:14:49 +0530 [thread overview]
Message-ID: <20171221034449.GB3944@afzalpc> (raw)
In-Reply-To: <db12818a-509f-2b28-7df0-dd923d956057@arm.com>
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
prev parent reply other threads:[~2017-12-21 3:44 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-19 10:23 [PATCH] ARM: NOMMU: Setup VBAR/Hivecs for secondaries cores Vladimir Murzin
2017-12-19 11:29 ` afzal mohammed
2017-12-19 14:44 ` Vladimir Murzin
2017-12-20 4:52 ` afzal mohammed
2017-12-20 9:55 ` Vladimir Murzin
2017-12-20 11:49 ` afzal mohammed
2017-12-20 12:01 ` afzal mohammed
2017-12-20 12:22 ` Vladimir Murzin
2017-12-21 4:05 ` afzal mohammed
2017-12-20 12:12 ` afzal mohammed
2017-12-20 12:22 ` Vladimir Murzin
2017-12-21 3:44 ` afzal mohammed [this message]
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