with a multi-page head buffer. The new skbuff will not have a
multi-page head buffer, which is a necessary restriction until this is
supported by the internals of the netback driver.
Signed-off-by: Steven Smith <ssmith@xensource.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
Netfront's use of nh.raw and h.raw for storing page+offset is a bit
hinky, and it breaks with upcoming network stack updates which reduce
these fields to sub-pointer sizes. Fortunately, skb offers the "cb"
field specifically for stashing this kind of info, so use it.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
1. rx_lock is a normal spinlock, and tx_lock is an irq spinlock. This
means that in normal use, tx_lock may be taken by an interrupt
routine while rx_lock is held. However, netif_disconnect_backend
takes them in the order tx_lock->rx_lock, which could lead to a
deadlock. Reverse them.
2. rx_lock can also be used in softirq context, so it should be
taken/released with spin_(un)lock_bh.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
drivers are not present. The feature-foo mechanism does not actually
work after save/restore since the fields do not get rewritten. And it
doesn't work when we actually need the guest to be shutdown through
Xen (e.g., on suspend). Since we can quite reasonably assume that the
only entity to screw with control/shutdown is xend, and since the one
place that does that now explicitly handles unenlightened HVM guests,
we can simply strip all this stuff out.
This has the nice benefit of making HVM save/restore with PV drivers
much more reliable.
Signed-off-by: Keir Fraser <keir@xensource.com>
after balloon operations in an HVM guest.
This removes the I/O port hack from the guest OS, and from ioemu.
Also we flush on reservation *increases* as well as decreases. This is
necessary until qemu-dm can demand-fault page mappings into existing
valid buckets.
Signed-off-by: Steven Hand <steven@xensource.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
A character device for accessing (in user-space) pages that have been
granted by other domains.
Signed-off-by: Derek Murray <Derek.Murray@cl.cam.ac.uk>
Fix ioctl interface to be 32/64-bit invariant. Move xen_class
mechanism to common util.c.
Signed-off-by: Keir Fraser <keir@xensource.com>
they may not (and even if they try, can not) restore the BARs. Since
Linux does not do this for us, pciback must do it for itself manually.
Possible todo: Restore all first 64 bytes of the config space?
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
__must_check post-2.6.18.
This implies completely suppressing frontend/backend operations if the
respective bus or device registration failed.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
through to the guest. However, ^O is a useful key in bash and in
Emacs. This patch changes the console to pass a single ^O
through to the guest when it is pressed twice.
Signed-off-by: Ben Pfaff <blp@cs.stanford.edu>
- remove superfluous call to pciback_field_is_dup()
- fix a variable type mismatch in pciback_field_is_dup()
- make readability improvements by using the OFFSET macro
- revises quirk data output via the sysfs quirks node so that
- displayed offset information includes base_offset.
Thanks to Jambunathan K. for giving such specific bug diagnosis.
Signed-off-by: Chris Bookholt <hap10@tycho.ncsc.mil>
