Re: [Qemu-devel] [PATCH 5/5] Add Cortex-A15 CPU definition

[Peter Maydell]

On 10 February 2012 01:23, Paul Brook <address@hidden> wrote:
>> Add a definition of a Cortex-A15 CPU. Note that for the moment we do
>> not implement any of:
>>  * Large Physical Address Extensions (LPAE)
>>  * Virtualization Extensions
>>  * Generic Timer
>
> Are there feature bits that the guest can check before blindly using them?  I
> assume for at least LPAE and the timer there's a way for the OS to test for
> these features without just poking at them and seing if they explode.
>
> If so it's worth adding coments describing where these diverge from a real
> A15.

There are feature bits, yes, but I've followed the general current
qemu practice of following the feature bits of the real hardware
rather than clearing feature bits for things we don't support
(eg for A9 we are currently claiming TrustZone and ThumbEE when
neither are actually true for QEMU).

-- PMM