Re: [RFC 08/17] kvm: arm/arm64: implement kvm_arm_[halt,resume]_guest

Marc Zyngier
2015-07-03T12:14:27Z

On 03/07/15 12:55, Eric Auger wrote:
> Christoffer, Marc,
> On 07/02/2015 03:17 PM, Eric Auger wrote:
>> On halt, the guest is forced to exit and prevented from being
>> re-entered. This is synchronous.
>>
>> Those two operations will be needed for IRQ forwarding setting.
>>
>> Signed-off-by: Eric Auger <eric.auger@linaro.org>
> would you agree to handle this ARM functionality separately from the
> forwarding series?
>
> This includes 2 patch files, that one +
> https://lkml.org/lkml/2015/7/2/288. This functionality is needed for
> forwarding control since when changing the forwarding state we need to
> "freeze" the state of the physical/virtual IRQ to undertake proper
> actions. Stopping the guest makes sure it won't deactivate the virtual
> IRQ while we are doing state change actions.
>
> The forwarding series is quite heterogeneous (VFIO platform driver,
> vgic, irq bypass manager) and I think it would simplify the review process.
>
> Please let me know if you agree. If yes, I will post a separate series.

I don't mind, I trust you to do what's best for these series to be
easily reviewed (if that is at all possible).

The only thing is that this patch implements a feature that will
otherwise be unused, so annotating the functions with __maybe_unused
would avoid warnings.

Thanks,

M.
--
Jazz is not dead. It just smells funny...