On Mon, 2012-06-18 at 17:33 +0300, Avi Kivity wrote:
> On 06/18/2012 05:27 PM, Alex Williamson wrote:
> > On Mon, 2012-06-18 at 13:14 +0300, Avi Kivity wrote:
> >> On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
> >>
> >> >> (vhost,
> >> >> msi-less ivshmem clone)?
> >> >
> >> > I guess vhost c
On 06/18/2012 05:18 PM, Alex Williamson wrote:
>>
>> I don't understand how this works. A level IRQ isn't de-asserted by the
>> EOI, it's de-asserted by its source.
>>
>> Consider the following sequence:
>>
>> deviceguest
>>
>> event
>>assert
>> interrupt
>>
On 06/18/2012 05:27 PM, Alex Williamson wrote:
> On Mon, 2012-06-18 at 13:14 +0300, Avi Kivity wrote:
>> On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
>>
>> >> (vhost,
>> >> msi-less ivshmem clone)?
>> >
>> > I guess vhost can poll eventfd and reinject an interrupt.
>> > Of course to bypass q
On Mon, 2012-06-18 at 14:17 +0300, Michael S. Tsirkin wrote:
> On Mon, Jun 18, 2012 at 02:03:40PM +0300, Avi Kivity wrote:
> > On 06/18/2012 01:55 PM, Michael S. Tsirkin wrote:
> > > On Mon, Jun 18, 2012 at 01:14:13PM +0300, Avi Kivity wrote:
> > >> On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
On Mon, 2012-06-18 at 13:14 +0300, Avi Kivity wrote:
> On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
>
> >> (vhost,
> >> msi-less ivshmem clone)?
> >
> > I guess vhost can poll eventfd and reinject an interrupt.
> > Of course to bypass qemu completely we also need to support reads over
> > io
On Mon, 2012-06-18 at 13:11 +0300, Michael S. Tsirkin wrote:
> On Mon, Jun 18, 2012 at 12:33:01PM +0300, Avi Kivity wrote:
> > On 06/18/2012 11:52 AM, Jan Kiszka wrote:
> > >>
> > >> I don't understand how this works. A level IRQ isn't de-asserted by the
> > >> EOI, it's de-asserted by its source
On Mon, 2012-06-18 at 11:02 +0300, Avi Kivity wrote:
> On 06/16/2012 07:34 PM, Alex Williamson wrote:
> > I'm looking for opinions on this approach. For vfio device assignment
> > we minimally need a way to get EOIs from the in-kernel irqchip out to
> > userspace. Getting that out via an eventfd
On Mon, 2012-06-18 at 08:51 +0300, Michael S. Tsirkin wrote:
> On Sun, Jun 17, 2012 at 03:38:57PM -0600, Alex Williamson wrote:
> > On Sun, 2012-06-17 at 21:44 +0300, Michael S. Tsirkin wrote:
> > > On Sat, Jun 16, 2012 at 10:34:39AM -0600, Alex Williamson wrote:
> > > > I'm looking for opinions on
On Mon, 2012-06-18 at 09:00 +0300, Michael S. Tsirkin wrote:
> On Sun, Jun 17, 2012 at 04:15:44PM -0600, Alex Williamson wrote:
> > On Sun, Jun 17, 2012 at 3:38 PM, Alex Williamson
> > wrote:
> > > On Sun, 2012-06-17 at 21:44 +0300, Michael S. Tsirkin wrote:
> > >> On Sat, Jun 16, 2012 at 10:34:39
On Mon, Jun 18, 2012 at 02:03:40PM +0300, Avi Kivity wrote:
> On 06/18/2012 01:55 PM, Michael S. Tsirkin wrote:
> > On Mon, Jun 18, 2012 at 01:14:13PM +0300, Avi Kivity wrote:
> >> On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
> >>
> >> >> (vhost,
> >> >> msi-less ivshmem clone)?
> >> >
> >>
On 06/18/2012 01:55 PM, Michael S. Tsirkin wrote:
> On Mon, Jun 18, 2012 at 01:14:13PM +0300, Avi Kivity wrote:
>> On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
>>
>> >> (vhost,
>> >> msi-less ivshmem clone)?
>> >
>> > I guess vhost can poll eventfd and reinject an interrupt.
>> > Of course t
On Mon, Jun 18, 2012 at 01:14:13PM +0300, Avi Kivity wrote:
> On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
>
> >> (vhost,
> >> msi-less ivshmem clone)?
> >
> > I guess vhost can poll eventfd and reinject an interrupt.
> > Of course to bypass qemu completely we also need to support reads over
On 06/18/2012 01:11 PM, Michael S. Tsirkin wrote:
>> (vhost,
>> msi-less ivshmem clone)?
>
> I guess vhost can poll eventfd and reinject an interrupt.
> Of course to bypass qemu completely we also need to support reads over
> ioeventfd somehow.
>
eventfd is not suitable for level triggered inte
On Mon, Jun 18, 2012 at 12:33:01PM +0300, Avi Kivity wrote:
> On 06/18/2012 11:52 AM, Jan Kiszka wrote:
> >>
> >> I don't understand how this works. A level IRQ isn't de-asserted by the
> >> EOI, it's de-asserted by its source.
> >>
> >> Consider the following sequence:
> >>
> >> device
On 06/18/2012 11:52 AM, Jan Kiszka wrote:
>>
>> I don't understand how this works. A level IRQ isn't de-asserted by the
>> EOI, it's de-asserted by its source.
>>
>> Consider the following sequence:
>>
>> deviceguest
>>
>> event
>>assert
>> interrupt
>>
On 2012-06-18 10:02, Avi Kivity wrote:
> On 06/16/2012 07:34 PM, Alex Williamson wrote:
>> I'm looking for opinions on this approach. For vfio device assignment
>> we minimally need a way to get EOIs from the in-kernel irqchip out to
>> userspace. Getting that out via an eventfd would allow us to
On 06/16/2012 07:34 PM, Alex Williamson wrote:
> I'm looking for opinions on this approach. For vfio device assignment
> we minimally need a way to get EOIs from the in-kernel irqchip out to
> userspace. Getting that out via an eventfd would allow us to bounce
> all level interrupts out to usersp
On Sun, Jun 17, 2012 at 04:15:44PM -0600, Alex Williamson wrote:
> On Sun, Jun 17, 2012 at 3:38 PM, Alex Williamson
> wrote:
> > On Sun, 2012-06-17 at 21:44 +0300, Michael S. Tsirkin wrote:
> >> On Sat, Jun 16, 2012 at 10:34:39AM -0600, Alex Williamson wrote:
> >> > I'm looking for opinions on thi
On Sun, Jun 17, 2012 at 03:38:57PM -0600, Alex Williamson wrote:
> On Sun, 2012-06-17 at 21:44 +0300, Michael S. Tsirkin wrote:
> > On Sat, Jun 16, 2012 at 10:34:39AM -0600, Alex Williamson wrote:
> > > I'm looking for opinions on this approach. For vfio device assignment
> > > we minimally need a
On Sun, Jun 17, 2012 at 3:38 PM, Alex Williamson
wrote:
> On Sun, 2012-06-17 at 21:44 +0300, Michael S. Tsirkin wrote:
>> On Sat, Jun 16, 2012 at 10:34:39AM -0600, Alex Williamson wrote:
>> > I'm looking for opinions on this approach. For vfio device assignment
>> > we minimally need a way to get
On Sun, 2012-06-17 at 21:44 +0300, Michael S. Tsirkin wrote:
> On Sat, Jun 16, 2012 at 10:34:39AM -0600, Alex Williamson wrote:
> > I'm looking for opinions on this approach. For vfio device assignment
> > we minimally need a way to get EOIs from the in-kernel irqchip out to
> > userspace. Gettin
On Sat, Jun 16, 2012 at 10:34:39AM -0600, Alex Williamson wrote:
> I'm looking for opinions on this approach. For vfio device assignment
> we minimally need a way to get EOIs from the in-kernel irqchip out to
> userspace. Getting that out via an eventfd would allow us to bounce
> all level interr
On 2012-06-16 18:34, Alex Williamson wrote:
> I'm looking for opinions on this approach. For vfio device assignment
> we minimally need a way to get EOIs from the in-kernel irqchip out to
> userspace. Getting that out via an eventfd would allow us to bounce
> all level interrupts out to userspace
I'm looking for opinions on this approach. For vfio device assignment
we minimally need a way to get EOIs from the in-kernel irqchip out to
userspace. Getting that out via an eventfd would allow us to bounce
all level interrupts out to userspace, where we would de-assert the
device interrupt in q
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