kernel_optimize_test/include/xen
Stefano Stabellini 2fc136eecd xen/m2p: do not reuse kmap_op->dev_bus_addr
If the caller passes a valid kmap_op to m2p_add_override, we use
kmap_op->dev_bus_addr to store the original mfn, but dev_bus_addr is
part of the interface with Xen and if we are batching the hypercalls it
might not have been written by the hypervisor yet. That means that later
on Xen will write to it and we'll think that the original mfn is
actually what Xen has written to it.

Rather than "stealing" struct members from kmap_op, keep using
page->index to store the original mfn and add another parameter to
m2p_remove_override to get the corresponding kmap_op instead.
It is now responsibility of the caller to keep track of which kmap_op
corresponds to a particular page in the m2p_override (gntdev, the only
user of this interface that passes a valid kmap_op, is already doing that).

CC: stable@kernel.org
Reported-and-Tested-By: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-09-12 11:21:40 -04:00
..
interface xen/pv-on-hvm kexec: shutdown watches from old kernel 2012-07-19 15:52:02 -04:00
acpi.h xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep 2012-05-07 15:33:18 -04:00
balloon.h xen-balloon: convert sysdev_class to a regular subsystem 2011-12-14 15:32:50 -08:00
events.h Revert "xen PVonHVM: move shared_info to MMIO before kexec" 2012-08-16 13:05:25 -04:00
evtchn.h xen: add /dev/xen/evtchn driver 2009-03-30 09:26:49 -07:00
features.h
gntalloc.h xen/gntalloc,gntdev: Add unmap notify ioctl 2011-02-14 14:16:17 -05:00
gntdev.h xen/gntalloc,gntdev: Add unmap notify ioctl 2011-02-14 14:16:17 -05:00
grant_table.h xen/m2p: do not reuse kmap_op->dev_bus_addr 2012-09-12 11:21:40 -04:00
hvc-console.h treewide: use __printf not __attribute__((format(printf,...))) 2011-10-31 17:30:54 -07:00
hvm.h x86/xen: event channels delivery on HVM. 2010-07-22 16:45:59 -07:00
Kbuild xen: add privcmd driver 2010-10-20 16:22:29 -07:00
page.h xen: allow balloon driver to use more than one memory region 2011-09-29 11:12:10 -04:00
platform_pci.h xen: Remove hanging references to CONFIG_XEN_PLATFORM_PCI 2011-11-16 12:13:42 -05:00
privcmd.h xen: fix header export to userspace 2010-11-16 10:57:05 -08:00
swiotlb-xen.h X86 & IA64: adapt for dma_map_ops changes 2012-03-28 16:36:31 +02:00
tmem.h xen/tmem: cleanup 2012-03-20 15:34:18 -04:00
xen-ops.h Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
xen.h xen: move Xen-testing predicates to common header 2009-11-04 08:47:24 -08:00
xenbus_dev.h xenbus: Add support for xenbus backend in stub domain 2012-05-21 09:53:18 -04:00
xenbus.h include/ and checkpatch: prefer __scanf to __attribute__((format(scanf,...) 2012-03-23 16:58:36 -07:00
xencomm.h