Re: [PATCH v4 4/7] vfio: ap: register IOMMU VFIO notifier

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, 28 Feb 2019 09:48:39 +0100
Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote:

> On 28/02/2019 09:23, Christian Borntraeger wrote:
> > On 22.02.2019 16:29, Pierre Morel wrote:
> >> To be able to use the VFIO interface to facilitate the
> >> mediated device memory pining/unpining we need to register
> >> a notifier for IOMMU.
> > 
> > You might want to add that while we start to pin one guest page for the
> > interrupt indicator byte in the next patch, this is still ok with ballooning
> > as this page will never be used by the guest virtio-balloon driver. So the
> > pinned page will never be freed. And even a broken guest does so, that would
> > not impact the host as the original page is still in control by vfio.
> > 
> 
> Thanks, I ll do.
> 

I recall a comment in qemu that says vfio-ap does not pin any pages.
That one needs to be fixed up as well.

Regards,
Halil

[..]




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux