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SubjectRe: [PATCH v5] xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE
On 09/05/18 15:16, Paul Durrant wrote:
> My recent Xen patch series introduces a new HYPERVISOR_memory_op to
> support direct priv-mapping of certain guest resources (such as ioreq
> pages, used by emulators) by a tools domain, rather than having to access
> such resources via the guest P2M.
> This patch adds the necessary infrastructure to the privcmd driver and
> Xen MMU code to support direct resource mapping.
> NOTE: The adjustment in the MMU code is partially cosmetic. Xen will now
> allow a PV tools domain to map guest pages either by GFN or MFN, thus
> the term 'mfn' has been swapped for 'pfn' in the lower layers of the
> remap code.
> Signed-off-by: Paul Durrant <>
> Reviewed-by: Boris Ostrovsky <>

Pushed to xen/tip.git for-linus-4.18


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