David Vrabel ffac746691 xen: Add RING_COPY_REQUEST() ... commit 454d5d882c7e412b840e3c99010fe81a9862f6fb upstream. Using RING_GET_REQUEST() on a shared ring is easy to use incorrectly (i.e., by not considering that the other end may alter the data in the shared ring while it is being inspected). Safe usage of a request generally requires taking a local copy. Provide a RING_COPY_REQUEST() macro to use instead of RING_GET_REQUEST() and an open-coded memcpy(). This takes care of ensuring that the copy is done correctly regardless of any possible compiler optimizations. Use a volatile source to prevent the compiler from reordering or omitting the copy. This is part of XSA155. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Zefan Li <lizefan@huawei.com>		2016-10-26 23:15:39 +08:00
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hvm	hvc_xen: support PV on HVM consoles	2012-03-13 19:23:32 -04:00
io	xen: Add RING_COPY_REQUEST()	2016-10-26 23:15:39 +08:00
callback.h
elfnote.h	Fix common misspellings	2011-03-31 11:26:23 -03:00
event_channel.h	xen: clean up asm/xen/hypervisor.h	2008-12-16 21:50:31 +01:00
features.h
grant_table.h	xen/granttable: Introducing grant table V2 stucture	2011-11-22 09:23:44 -05:00
memory.h
physdev.h	xen: support pirq_eoi_map	2012-03-20 15:34:07 -04:00
platform.h	xen/acpi-processor: C and P-state driver that uploads said data to hypervisor.	2012-03-14 12:35:42 -04:00
sched.h
vcpu.h
version.h
xen.h	xen/granttable: Introducing grant table V2 stucture	2011-11-22 09:23:44 -05:00
xencomm.h