Commit Graph

7 Commits

Author SHA1 Message Date
David Vrabel a4cdb556ca xen/gntdev: add ioctl for grant copy
Add IOCTL_GNTDEV_GRANT_COPY to allow applications to copy between user
space buffers and grant references.

This interface is similar to the GNTTABOP_copy hypercall ABI except
the local buffers are provided using a virtual address (instead of a
GFN and offset).  To avoid userspace from having to page align its
buffers the driver will use two or more ops if required.

If the ioctl returns 0, the application must check the status of each
segment with the segments status field.  If the ioctl returns a -ve
error code (EINVAL or EFAULT), the status of individual ops is
undefined.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2016-01-07 13:21:53 +00:00
Mikko Rapeli a36012be64 xen/gntdev: use types from linux/types.h in userspace headers
__u32, __u64 etc. are preferred for userspace API headers.

Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-10-23 14:20:45 +01:00
Mikko Rapeli 91afb7c373 xen/gntalloc: use types from linux/types.h in userspace headers
__u32, __u64 etc. are preferred for userspace API headers.

Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-10-23 14:20:44 +01:00
Julien Grall a13d7201d7 xen/privcmd: Further s/MFN/GFN/ clean-up
The privcmd code is mixing the usage of GFN and MFN within the same
functions which make the code difficult to understand when you only work
with auto-translated guests.

The privcmd driver is only dealing with GFN so replace all the mention
of MFN into GFN.

The ioctl structure used to map foreign change has been left unchanged
given that the userspace is using it. Nonetheless, add a comment to
explain the expected value within the "mfn" field.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-09-08 18:03:54 +01:00
David Vrabel 564eb714f5 xen: install xen/gntdev.h and xen/gntalloc.h
xen/gntdev.h and xen/gntalloc.h both provide userspace ABIs so they
should be installed.

CC: stable@vger.kernel.org
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2014-02-11 10:12:36 -05:00
David Howells 72503791ed UAPI: (Scripted) Disintegrate include/xen
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
2012-10-09 09:49:15 +01:00
David Howells 4413e16d9d UAPI: (Scripted) Set up UAPI Kbuild files
Set up empty UAPI Kbuild files to be populated by the header splitter.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
2012-10-02 18:01:35 +01:00