linux/include/xen/interface
Michael S. Tsirkin 506b02eb1c xen/io: use virt_xxx barriers
include/xen/interface/io/ring.h uses
full memory barriers to communicate with the other side.

For guests compiled with CONFIG_SMP, smp_wmb and smp_mb
would be sufficient, so mb() and wmb() here are only needed if
a non-SMP guest runs on an SMP host.

Switch to virt_xxx barriers which serve this exact purpose.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2016-01-12 20:47:03 +02:00
..
hvm Feature: 2012-10-12 22:20:28 +09:00
io xen/io: use virt_xxx barriers 2016-01-12 20:47:03 +02:00
callback.h ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
elfnote.h xen: sync some headers with xen tree 2014-10-03 12:34:52 +01:00
event_channel.h xen/events: Add the hypervisor interface for the FIFO-based event channels 2014-01-06 10:07:52 -05:00
features.h xen/gntdev: mark userspace PTEs as special on x86 PV guests 2015-01-28 14:04:21 +00:00
grant_table.h xen/gntdev: mark userspace PTEs as special on x86 PV guests 2015-01-28 14:04:21 +00:00
memory.h xen: implement updated XENMEM_add_to_physmap_range ABI 2013-02-19 22:01:55 -05:00
nmi.h x86/xen: properly retrieve NMI reason 2015-01-13 09:39:50 +00:00
physdev.h xen: add support for MSI message groups 2014-03-18 14:40:09 +00:00
platform.h xen: xensyms support 2015-08-20 12:24:25 +01:00
sched.h x86/xen: Support kexec/kdump in HVM guests by doing a soft reset 2015-09-28 14:48:52 +01:00
vcpu.h xen: Support 64-bit PV guest receiving NMIs 2013-08-09 10:55:47 -04:00
version.h xen/acpi: Move the xen_running_on_version_or_later function. 2012-11-28 14:39:31 -05:00
xen-mca.h xen/mce: Add mcelog support for Xen platform 2012-07-19 15:51:36 -04:00
xen.h xen/PMU: Initialization code for Xen PMU 2015-08-20 12:25:20 +01:00
xenpmu.h xen/PMU: Intercept PMU-related MSR and APIC accesses 2015-08-20 12:25:25 +01:00