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Re: [Xen-devel] [PATCH] xen/arm: remove check for generic timer support for arm64

On 06/02/2014 03:11 PM, Ian Campbell wrote:
> On Mon, 2014-06-02 at 19:38 +0530, Vijay Kilari wrote:
>> On Mon, Jun 2, 2014 at 7:32 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
>>> On Mon, 2014-06-02 at 19:29 +0530, Vijay Kilari wrote:
>>>> However generic timer is required for aarch64 mode.
>>> Do you have an ARM ARM reference for that? If true it would indeed
>>> simplify things, but I was unable to find a statement along those
>>> lines...
>>   Sorry, I too didn't not get any reference for this.
>> But in arm64 where Aarch32 is optional, why should one rely on Aarch32
>> feature register
>> if generic timer is anyway required for Aarch64
> We shouldn't, the bug is that we are checking the AArch32 feature
> register instead of the AArch64 one in this case (see the rest of this
> thread).

AArch64 doesn't have a similar feature bit in AA64PFR*.

Julien Grall

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