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xen: fixes for 4.14-rc7

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Merge tag 'for-linus-4.14c-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - a fix for the Xen gntdev device repairing an issue in case of partial
   failure of mapping multiple pages of another domain

 - a fix of a regression in the Xen balloon driver introduced in 4.13

 - a build fix for Xen on ARM which will trigger e.g. for Linux RT

 - a maintainers update for pvops (not really Xen, but carrying through
   this tree just for convenience)

* tag 'for-linus-4.14c-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  maintainers: drop Chris Wright from pvops
  arm/xen: don't inclide rwlock.h directly.
  xen: fix booting ballooned down hvm guest
  xen/gntdev: avoid out of bounds access in case of partial gntdev_mmap()
This commit is contained in:
Linus Torvalds 2017-10-27 20:41:05 -07:00
commit 11224e1fc4
4 changed files with 15 additions and 9 deletions
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1
MAINTAINERS
View file

@ -10179,7 +10179,6 @@ F: Documentation/parport*.txt
PARAVIRT_OPS INTERFACE
M: Juergen Gross <jgross@suse.com>
M: Chris Wright <chrisw@sous-sol.org>
M: Alok Kataria <akataria@vmware.com>
M: Rusty Russell <rusty@rustcorp.com.au>
L: virtualization@lists.linux-foundation.org

2
arch/arm/xen/p2m.c
View file

@ -1,7 +1,7 @@
#include <linux/bootmem.h>
#include <linux/gfp.h>
#include <linux/export.h>
#include <linux/rwlock.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/dma-mapping.h>

2
drivers/xen/gntdev.c
View file

@ -1024,6 +1024,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
mutex_unlock(&priv->lock);
if (use_ptemod) {
map->pages_vm_start = vma->vm_start;
err = apply_to_page_range(vma->vm_mm, vma->vm_start,
vma->vm_end - vma->vm_start,
find_grant_ptes, map);
@ -1061,7 +1062,6 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
set_grant_ptes_as_special, NULL);
}
#endif
map->pages_vm_start = vma->vm_start;
}
return 0;

19
drivers/xen/xen-balloon.c
View file

@ -57,7 +57,7 @@ static int register_balloon(struct device *dev);
static void watch_target(struct xenbus_watch *watch,
const char *path, const char *token)
{
unsigned long long new_target;
unsigned long long new_target, static_max;
int err;
static bool watch_fired;
static long target_diff;
@ -72,13 +72,20 @@ static void watch_target(struct xenbus_watch *watch,
* pages. PAGE_SHIFT converts bytes to pages, hence PAGE_SHIFT - 10.
*/
new_target >>= PAGE_SHIFT - 10;
if (watch_fired) {
balloon_set_new_target(new_target - target_diff);
return;
if (!watch_fired) {
watch_fired = true;
err = xenbus_scanf(XBT_NIL, "memory", "static-max", "%llu",
&static_max);
if (err != 1)
static_max = new_target;
else
static_max >>= PAGE_SHIFT - 10;
target_diff = xen_pv_domain() ? 0
: static_max - balloon_stats.target_pages;
}
watch_fired = true;
target_diff = new_target - balloon_stats.target_pages;
balloon_set_new_target(new_target - target_diff);
}
static struct xenbus_watch target_watch = {
.node = "memory/target",