Re: [Qemu-devel] [PATCH 3/3] target/arm: Make Cortex-M3 and M4 default to 8 PMSA regions

[Peter Maydell]

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.)

thanks
-- PMM