Merge tag 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux...

[deliverable/linux.git] / drivers / xen / Kconfig

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index b812462083fcaf8d32c215327d28b7c4b7e6e4da..94d96809e686b9ffd1f83c76681c8c3ff0a7cf92 100644 (file)
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -55,6 +55,23 @@ config XEN_BALLOON_MEMORY_HOTPLUG
 
          In that case step 3 should be omitted.
 
+config XEN_BALLOON_MEMORY_HOTPLUG_LIMIT
+       int "Hotplugged memory limit (in GiB) for a PV guest"
+       default 512 if X86_64
+       default 4 if X86_32
+       range 0 64 if X86_32
+       depends on XEN_HAVE_PVMMU
+       depends on XEN_BALLOON_MEMORY_HOTPLUG
+       help
+         Maxmium amount of memory (in GiB) that a PV guest can be
+         expanded to when using memory hotplug.
+
+         A PV guest can have more memory than this limit if is
+         started with a larger maximum.
+
+         This value is used to allocate enough space in internal
+         tables needed for physical memory administration.
+
 config XEN_SCRUB_PAGES
        bool "Scrub pages before returning them to system"
        depends on XEN_BALLOON