Re: [PATCH v3 2/3] xen/privcmd: Add IOCTL_PRIVCMD_DM_OP

From: Boris Ostrovsky
Date: Wed Feb 15 2017 - 09:46:43 EST

On 02/13/2017 12:03 PM, Paul Durrant wrote:
> Recently a new dm_op[1] hypercall was added to Xen to provide a mechanism
> for restricting device emulators (such as QEMU) to a limited set of
> hypervisor operations, and being able to audit those operations in the
> kernel of the domain in which they run.
> This patch adds IOCTL_PRIVCMD_DM_OP as gateway for __HYPERVISOR_dm_op.
> NOTE: There is no requirement for user-space code to bounce data through
> locked memory buffers (as with IOCTL_PRIVCMD_HYPERCALL) since
> privcmd has enough information to lock the original buffers
> directly.
> [1];a=commit;h=524a98c2
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

Applied to for-linus-4.11 (with agreed upon adjustments)