VFIO MSIX Query

From	"Saxena, Nitin" <Nitin.Saxena@caviumnetworks.com>
Newsgroups	linux.kernel
Subject	VFIO MSIX Query
Date	2016-05-03 21:20 +0200
Message-ID	<ruO1s-5AX-9@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Show all headers | View raw

Hi,

I am a newbie to VFIO framework and trying to use it for MSIX interrupt handling in my userspace application. My userspace application is like intel's dpdk.

My query is why vfio kernel code does not support msix masking/ unmasking i.e VFIO_SET_ACTION_TRIGGER is not implemented in kernel vfio code for MSIX but its present for legacy INTX?

Another question since MSIX interrupt masking is absent in kernel who is supposed to mask/unmask msix interrupt? does userspace needs to mask/unmask interrupt after getting notified by eventfd. Is there any usecase where MSIX handling is done via VFIO framework?

Thanks,
Nitin 


Regards,
Nitin

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

VFIO MSIX Query "Saxena, Nitin" <Nitin.Saxena@caviumnetworks.com> - 2016-05-03 21:20 +0200

csiph-web