From d24c6b78ac550072df359c17e6aadddf079257d0 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne Date: Wed, 14 May 2025 11:20:36 +0200 Subject: [PATCH] xen: enable XEN_UNPOPULATED_ALLOC as part of xen.config MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Juergen Gross Message-ID: <20250514092037.28970-1-roger.pau@citrix.com> Signed-off-by: Juergen Gross --- kernel/configs/xen.config | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/configs/xen.config b/kernel/configs/xen.config index 6878b9a49be8d..1875a0a5047ac 100644 --- a/kernel/configs/xen.config +++ b/kernel/configs/xen.config @@ -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 -- 2.47.2