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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-09-06 09:59:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-09-06 09:59:27 -0700 |
| commit | 68beef571071014ef34a3beac65fe2af7e8e3cf6 (patch) | |
| tree | 7a6e7b5875e909baf587b947b536512d95d046de /drivers/xen/Kconfig | |
| parent | dd9fb9bb3340c791a2be106fdc895db75f177343 (diff) | |
| parent | 9e2369c06c8a181478039258a4598c1ddd2cadfa (diff) | |
| download | lwn-68beef571071014ef34a3beac65fe2af7e8e3cf6.tar.gz lwn-68beef571071014ef34a3beac65fe2af7e8e3cf6.zip | |
Merge tag 'for-linus-5.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross:
"A small series for fixing a problem with Xen PVH guests when running
as backends (e.g. as dom0).
Mapping other guests' memory is now working via ZONE_DEVICE, thus not
requiring to abuse the memory hotplug functionality for that purpose"
* tag 'for-linus-5.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: add helpers to allocate unpopulated memory
memremap: rename MEMORY_DEVICE_DEVDAX to MEMORY_DEVICE_GENERIC
xen/balloon: add header guard
Diffstat (limited to 'drivers/xen/Kconfig')
| -rw-r--r-- | drivers/xen/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index ea6c1e7e3e42..41645fe6ad48 100644 --- 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 |