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* xen: fix grant table bugMichael Abd-El-Malek2008-04-04
| | | | | | | | | | | | | | | | | | | | | | | | | fix memory corruption and crash due to mis-sized grant table. A PV OS has two grant table data structures: the grant table itself and a free list. The free list is composed of an array of pages, which grow dynamically as the guest OS requires more grants. While the grant table contains 8-byte entries, the free list contains 4-byte entries. So we have half as many pages in the free list than in the grant table. There was a bug in the free list allocation code. The free list was indexed as if it was the same size as the grant table. But it's only half as large. So memory got corrupted, and I was seeing crashes in the slab allocator later on. Taken from: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/4018c0da3360 Signed-off-by: Michael Abd-El-Malek <mabdelmalek@cmu.edu> Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Add missing newlines to some uses of dev_<level> messagesJoe Perches2007-10-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Found these while looking at printk uses. Add missing newlines to dev_<level> uses Add missing KERN_<level> prefixes to multiline dev_<level>s Fixed a wierd->weird spelling typo Added a newline to a printk Signed-off-by: Joe Perches <joe@perches.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Roland Dreier <rolandd@cisco.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Greg KH <greg@kroah.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Smart <James.Smart@Emulex.Com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* xenbus_xs.c: fix a use-after-freeAdrian Bunk2007-07-26
| | | | | | | | | This patch fixes an obvious use-after-free spotted by the Coverity checker. Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* xen: add the Xenbus sysfs and virtual device hotplug driverJeremy Fitzhardinge2007-07-18
| | | | | | | | | | | | | | | | This communicates with the machine control software via a registry residing in a controlling virtual machine. This allows dynamic creation, destruction and modification of virtual device configurations (network devices, block devices and CPUS, to name some examples). [ Greg, would you mind giving this a review? Thanks -J ] Signed-off-by: Ian Pratt <ian.pratt@xensource.com> Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Cc: Greg KH <greg@kroah.com>
* xen: Add grant table supportJeremy Fitzhardinge2007-07-18
Add Xen 'grant table' driver which allows granting of access to selected local memory pages by other virtual machines and, symmetrically, the mapping of remote memory pages which other virtual machines have granted access to. This driver is a prerequisite for many of the Xen virtual device drivers, which grant the 'device driver domain' restricted and temporary access to only those memory pages that are currently involved in I/O operations. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Ian Pratt <ian.pratt@xensource.com> Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by: Chris Wright <chrisw@sous-sol.org>