Messages in this thread | | | Date | Thu, 01 Apr 2010 19:10:57 +0300 | From | Avi Kivity <> | Subject | Re: [PATCH 0/1] uio_pci_generic: extensions to allow access for non-privileged processes |
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On 04/01/2010 07:06 PM, Tom Lyon wrote: > On Thursday 01 April 2010 08:54:14 am Avi Kivity wrote: > >> On 04/01/2010 06:39 PM, Tom Lyon wrote: >> >>>>> - support for MSI and MSI-X interrupts (the intel 82599 VFs support >>>>> only MSI-X) >>>>> >>>> How does a userspace program receive those interrupts? >>>> >>> Same as other UIO drivers - by read()ing an event counter. >>> >> IIRC the usual event counter is /dev/uioX, what's your event counter now? >> > Exact same mechanism. >
But there are multiple msi-x interrupts, how do you know which one triggered?
>> kvm really wants the event counter to be an eventfd, that allows hooking >> it directly to kvm (which can inject an interrupt on an eventfd_signal), >> can you adapt your patch to do this? >> > My patch does not currently go anywhere near the read/fd logic of /dev/uioX. > I think a separate patch would be appropriate. >
Sure.
-- error compiling committee.c: too many arguments to function
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