Re: [RFC PATCH v2 04/51] KVM: guest_memfd: Introduce KVM_GMEM_CONVERT_SHARED/PRIVATE ioctls

[Jason Gunthorpe]

On Fri, Jul 18, 2025 at 10:48:55AM +0800, Xu Yilun wrote:
> > If by the time KVM gets the conversion request, the page is unpinned,
> > then we're all good, right?
> 
> Yes, unless guest doesn't unpin the page first by mistake. Guest would
> invoke a fw call tdg.mem.page.release to unpin the page before
> KVM_HC_MAP_GPA_RANGE.

What does guest pinning mean?

Jason