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xen: enable XEN_UNPOPULATED_ALLOC as part of xen.config

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PVH dom0 is useless without XEN_UNPOPULATED_ALLOC, as otherwise it will
very likely balloon out all dom0 memory to map foreign and grant pages.

Enable it by default as part of xen.config.  This also requires enabling
MEMORY_HOTREMOVE and ZONE_DEVICE.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Message-ID: <20250514092037.28970-1-roger.pau@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Roger Pau Monne 2025-05-14 11:20:36 +02:00 • committed by Juergen Gross
parent 406251a408
commit d24c6b78ac
1 changed files with 3 additions and 0 deletions
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3
kernel/configs/xen.config
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@ -13,6 +13,8 @@ CONFIG_SCSI=y
CONFIG_FB=y
CONFIG_INPUT_MISC=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_ZONE_DEVICE=y
CONFIG_TTY=y
# Technically not required but otherwise produces
# pretty useless systems starting from allnoconfig
@ -47,3 +49,4 @@ CONFIG_XEN_GNTDEV=m
CONFIG_XEN_GRANT_DEV_ALLOC=m
CONFIG_SWIOTLB_XEN=y
CONFIG_XEN_PRIVCMD=m
CONFIG_XEN_UNPOPULATED_ALLOC=y