Re: [Qemu-devel] Regarding Cortex-A7 CPU definition

[Deepak kumar Raju <raju.deepakkumar@gmail.com>]

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Hi Peter,

We are emulating the A7 hardware board in QEMU. Currently I have started
with A15 CPU config. I need to enable GIC and generic timer. Can you please
point me to how GIC & generic timer should be enabled considering
vexpress.c emulation board?.
Thanks in advance for the help,

Best Regards,
-Deepak

On Wed, Feb 10, 2016 at 3:43 PM, Peter Maydell <peter.maydell@linaro.org>
wrote:

> On 10 February 2016 at 05:25, Deepak kumar Raju
> <raju.deepakkumar@gmail.com> wrote:
> > Regarding the questions, we have hw board which has Cortex-A7, so we
> thought
> > we have to go with A7 emulation. we were not very sure A15 emulation
> will be
> > almost equivalent to A7 emulation.
> > All we want to do is A7 emulation but now I am understanding that A15
> > emulation should similar to A7 emulation. please correct me.
>
> If you want to emulate the whole hardware board in QEMU,
> then adding the A7 CPU emulation is the right thing (and
> not very hard compared to doing the whole hardware model).
> If you don't care about emulating the hardware because you're
> going to run (say) a Linux kernel on one of QEMU's existing
> models and you mostly care about userspace, then using the
> A15 will be fine -- the two CPUs are basically identical
> for that purpose, and Linux supports both.
>
> If you're running QEMU to use KVM on the ARM hardware,
> then you want "-cpu host", which means "use the best CPU
> type that the kernel can provide" and works on A7 and A15
> hosts.
>
> thanks
> -- PMM
>

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