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Re: [Qemu-arm] [PATCH 3/3] target/arm: Make Cortex-M3 and M4 default to


From: Marc-André Lureau
Subject: Re: [Qemu-arm] [PATCH 3/3] target/arm: Make Cortex-M3 and M4 default to 8 PMSA regions
Date: Tue, 11 Jul 2017 13:30:06 -0400 (EDT)

hi

----- Original Message -----
> On 11 July 2017 at 18:18, Marc-André Lureau <address@hidden>
> wrote:
> > ----- Original Message -----
> >> The Cortex-M3 and M4 CPUs always have 8 PMSA MPU regions (this isn't
> >> a configurable option for the hardware).  Make the default value of
> >> the pmsav7-dregion property be set per-cpu, so we don't need to have
> >> every user of these CPUs set it manually.  (The existing default of
> >> 16 is correct for the other PMSAv7 core, the Cortex-R5.)
> >>
> >> Signed-off-by: Peter Maydell <address@hidden>
> >
> > So until now that value was wrong for m3/m4 if I understand correctly.
> 
> Correct. (It was too high, so didn't cause a problem for
> guests typically -- a guest assuming 8 memory regions would
> just not use the registers associated with the extra
> unexpected ones.)

Would be nice to add that to the commit message

in any case:
Reviewed-by: Marc-André Lureau <address@hidden>



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