Merge tag 'for-linus-5.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...

[ceph-client.git] / drivers / xen / Kconfig

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index ea6c1e7e3e421a3257c2754ee635705e5e5926b9..41645fe6ad48a2902e5dbb1827b859e0e3e39ecc 100644 (file)
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -325,4 +325,14 @@ config XEN_HAVE_VPMU
 config XEN_FRONT_PGDIR_SHBUF
        tristate
 
+config XEN_UNPOPULATED_ALLOC
+       bool "Use unpopulated memory ranges for guest mappings"
+       depends on X86 && ZONE_DEVICE
+       default XEN_BACKEND || XEN_GNTDEV || XEN_DOM0
+       help
+         Use unpopulated memory ranges in order to create mappings for guest
+         memory regions, including grant maps and foreign pages. This avoids
+         having to balloon out RAM regions in order to obtain physical memory
+         space to create such mappings.
+
 endmenu