Re: [Xen-devel] ARM Generic Timer interrupt

[Oleksandr Tyshchenko <oleksandr.tyshchenko@xxxxxxxxxxxxxxx>]

OK. Thank you for clarifications. I would prefer to leave modified interrupt handler for virtual timer in QNX.

On Tue, May 27, 2014 at 7:12 PM, Julien Grall <julien.grall@xxxxxxxxxx> wrote:

On 05/27/2014 05:05 PM, Stefano Stabellini wrote:
> On Tue, 27 May 2014, Julien Grall wrote:
>> On 05/27/2014 01:11 PM, Stefano Stabellini wrote:
>>> Given that 1) didn't sound right to me, I tried 2) first but I had
>>> issues with the ARM emulator at the time. ÂAnd as an ulterior
>>> confirmation that deactivating it is not how ARM thought that the vtimer
>>> should be used, Linux and KVM do 1) too.
>>
>> I suspect you had issue on the emulator because VCPU can EOI the timer
>> IRQ on another CPU.
>>
>> If so, you will disable the vtimer interrupt forever on this CPU.
>
> I don't think so (unless the vcpu is migrated).
> Keep in mind that the vtimer is a PPI.

Sorry, I meant during VCPU migration.

Regards,

--
Julien Grall

--

Oleksandr Tyshchenko | Embedded Dev
GlobalLogic
www.globallogic.com

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