linux/drivers/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
..
xen-pciback xen/pciback: Fix proper FLR steps. 2012-09-06 09:22:02 -04:00
xenbus xen/pv-on-hvm kexec: shutdown watches from old kernel 2012-07-19 15:52:02 -04:00
xenfs xen: Add xenbus device driver 2011-12-16 13:29:39 -05:00
Kconfig xen/mce: Add mcelog support for Xen platform 2012-07-19 15:51:36 -04:00
Makefile xen/pcpu: Xen physical cpus online/offline sys interface 2012-07-19 15:51:39 -04:00
acpi.c xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep 2012-05-07 15:33:18 -04:00
balloon.c xen/balloon: Avoid OOM when requesting highmem 2011-11-16 12:13:43 -05:00
biomerge.c xen: using EXPORT_SYMBOL requires including export.h 2012-01-18 15:37:49 -08:00
cpu_hotplug.c xen/bootup: During bootup suppress XENBUS: Unable to read cpu state 2012-02-03 16:05:30 -05:00
events.c Five bug-fixes: 2012-06-15 17:17:15 -07:00
evtchn.c xen/event: Add reference counting to event channels 2011-11-21 17:14:48 -05:00
features.c
gntalloc.c xen-gntalloc: introduce missing kfree 2012-01-03 13:39:04 -05:00
gntdev.c xen/m2p: do not reuse kmap_op->dev_bus_addr 2012-09-12 11:21:40 -04:00
grant-table.c xen/m2p: do not reuse kmap_op->dev_bus_addr 2012-09-12 11:21:40 -04:00
manage.c xen/resume: Fix compile warnings. 2012-04-19 15:12:49 -04:00
mcelog.c xen/mce: add .poll method for mcelog device driver 2012-07-19 15:51:41 -04:00
pci.c xen/pci: Check for PCI bridge before using it. 2012-05-30 10:16:35 -04:00
pcpu.c xen/pcpu: Xen physical cpus online/offline sys interface 2012-07-19 15:51:39 -04:00
platform-pci.c Revert "xen PVonHVM: move shared_info to MMIO before kexec" 2012-08-16 13:05:25 -04:00
privcmd.c xen/privcmd: Remove unused support for arch specific privcmp mmap 2011-12-16 13:29:42 -05:00
privcmd.h xen: Add privcmd device driver 2011-12-16 13:29:31 -05:00
swiotlb-xen.c xen: Use correct masking in xen_swiotlb_alloc_coherent. 2012-09-05 10:50:27 -04:00
sys-hypervisor.c xen: constify all instances of "struct attribute_group" 2012-03-14 12:34:19 -04:00
tmem.c frontswap: s/put_page/store/g s/get_page/load 2012-05-15 11:34:08 -04:00
xen-acpi-processor.c xen/acpi: Fix potential memory leak. 2012-07-19 15:51:42 -04:00
xen-balloon.c Features: 2012-03-22 20:16:14 -07:00
xen-selfballoon.c xen: Add selfballoning memory reservation tunable. 2012-05-21 10:52:53 -04:00
xencomm.c