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Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl ou
From: |
Avi Kivity |
Subject: |
Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create() |
Date: |
Tue, 14 Aug 2012 16:14:35 +0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 |
On 08/14/2012 02:05 PM, Jan Kiszka wrote:
> On 2012-08-14 13:01, Avi Kivity wrote:
>> On 08/14/2012 10:33 AM, Jan Kiszka wrote:
>>>
>>> KVM_IRQ_LINE is old-style, deprecated, KVM_IRQ_LINE_STATUS (i.e
>>> injection with feedback to allow lost-tick compensation) is the current
>>> standard that other archs should pick up.
>>
>> KVM_IRQ_LINE_STATUS may not make sense on all architectures.
>>
>> I don't think we're really deprecating KVM_IRQ_LINE or discouraging its
>> use. It's not like the kernel-allocated memory slot ioctls.
>
> I do not think it makes sense to provide both interfaces long term
> (provided we ever do a cut). Also, it's almost trivial to provide the
> add-on feature of KVM_IRQ_LINE_STATUS, and it keeps the door open for
> IRQ decoalescing. If there is no way for an arch to detect coalescing,
> it can still return >0 unconditionally.
That's lying. I don't see how anything bad can come out of it, but we
can always be surprised. If we can't support something, let's not claim
we do.
--
error compiling committee.c: too many arguments to function
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), (continued)
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Jan Kiszka, 2012/08/14
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Peter Maydell, 2012/08/14
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Jan Kiszka, 2012/08/14
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Peter Maydell, 2012/08/14
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Jan Kiszka, 2012/08/14
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Peter Maydell, 2012/08/14
- Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Jan Kiszka, 2012/08/14
Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Avi Kivity, 2012/08/14
Re: [Qemu-devel] [PATCH] kvm-all.c: Move init of irqchip_inject_ioctl out of kvm_irqchip_create(), Jan Kiszka, 2012/08/14