Re: [Xen-devel] Memory Sharing

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 04/02/16 21:04, hanji unit wrote:
> Hello, does Xen support sharing memory pages between multiple domains
> (such as as Dom0, DomU1, DomU2)? The Grant Table hypercalls seem
> limited to:
> 
> IOCTL_GNTALLOC_ALLOC_GREF
> IOCTL_GNTALLOC_DEALLOC_GREF
> IOCTL_GNTALLOC_SET_UNMAP_NOTIFY

These are the ioctls provided by the gntalloc driver.  The grant table
mechanism itself can share any page of guest memory.

If you need to share an already allocated page of userspace memory, the
gntalloc driver would need to be extended with a new ioctl.

David

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel