Re: [Qemu-devel] [PATCH v3 0/4] Balloon inhibit enhancements, vfio restriction

[Michael S. Tsirkin]

On Wed, Aug 08, 2018 at 04:23:04PM -0600, Alex Williamson wrote:
> So again, I think this comes down to new iommu driver support and new
> iommu apis and new vfio apis to enable some sort of atomic update
> interface,

Oh absolutely. My point is some guest OS can start using atomic updates
at any time since it's something IOMMU hardware supports.  Adherence to
a hardware spec would be preferable to adherence to an internal Linux
API.  I appreciate it's not an easy task involving host Linux and QEMU
changes.

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MST