Merge tag 'for-linus-4.14c-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel...
authorLinus Torvalds <torvalds@linux-foundation.org>
Sat, 28 Oct 2017 03:41:05 +0000 (20:41 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 28 Oct 2017 03:41:05 +0000 (20:41 -0700)
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()

MAINTAINERS
arch/arm/xen/p2m.c
drivers/xen/gntdev.c
drivers/xen/xen-balloon.c

index d85c08956875e54b1273e29577bdd9af824b04ec..af0cb69f6a3edf8a483b9091c23dfbc6f54b6503 100644 (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
index e71eefa2e427bf2703ba7f6c7fb7a6577d8ab390..0641ba54ab62ae9786cb12ab88b2666b5c783b7a 100644 (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>
index 82360594fa8e49bcbad179a6bb349564286cf203..57efbd3b053b37ca43816483dd3364c3c48a761e 100644 (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;
index e89136ab851e30c1aff97893615f72f2d5bf3cd7..b437fccd4e624e3b7a8972245e9e992fe77c2993 100644 (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",