diff options
| author | Paul Durrant <paul.durrant@citrix.com> | 2018-05-09 14:16:12 +0100 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2018-05-14 15:25:37 +0200 |
| commit | 3ad0876554cafa368f574d4d408468510543e9ff (patch) | |
| tree | 7fade80924630151265270e68355d3f68b029bad /include/xen/interface/xen.h | |
| parent | 4bf2cc9645599382e34b7d0cbe5a13d0de98194e (diff) | |
xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE
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 <paul.durrant@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include/xen/interface/xen.h')
| -rw-r--r-- | include/xen/interface/xen.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h index 4f4830ef8f93..8bfb242f433e 100644 --- a/include/xen/interface/xen.h +++ b/include/xen/interface/xen.h @@ -265,9 +265,10 @@ * * PAT (bit 7 on) --> PWT (bit 3 on) and clear bit 7. */ -#define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */ -#define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */ -#define MMU_PT_UPDATE_PRESERVE_AD 2 /* atomically: *ptr = val | (*ptr&(A|D)) */ +#define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */ +#define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */ +#define MMU_PT_UPDATE_PRESERVE_AD 2 /* atomically: *ptr = val | (*ptr&(A|D)) */ +#define MMU_PT_UPDATE_NO_TRANSLATE 3 /* checked '*ptr = val'. ptr is MA. */ /* * MMU EXTENDED OPERATIONS |