linux-yocto: add vxn distro feature and Xen PV kernel config

Add 'vxn' to DISTRO_FEATURES in vruntime.conf to enable Xen PV guest
kernel configuration. When set, linux-yocto_virtualization.inc includes
vxn.cfg which enables Xen PVH frontend drivers and the 9p Xen transport
(NET_9P_XEN). The base 9p stack comes from the existing vcontainer
feature via cfg/container.scc.

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

2 files changed, 5 insertions, 2 deletions

diff --git a/recipes-kernel/linux/linux-yocto/vxn.cfg b/recipes-kernel/linux/linux-yocto/vxn.cfg
index 932732dc..4358812c 100644
--- a/recipes-kernel/linux/linux-yocto/vxn.cfg
+++ b/recipes-kernel/linux/linux-yocto/vxn.cfg
@@ -20,5 +20,5 @@ CONFIG_HVC_XEN_FRONTEND=y
 # Framebuffer frontend (not strictly required but useful)
 CONFIG_XEN_FBDEV_FRONTEND=y
 
-# 9pfs frontend for file sharing (trans=xen)
-CONFIG_XEN_9PFS_FRONTEND=y
+# 9pfs Xen transport (base 9p stack comes from cfg/container.scc via vcontainer)
+CONFIG_NET_9P_XEN=y
diff --git a/recipes-kernel/linux/linux-yocto_virtualization.inc b/recipes-kernel/linux/linux-yocto_virtualization.inc
index 89e73c48..8d14ce92 100644
--- a/recipes-kernel/linux/linux-yocto_virtualization.inc
+++ b/recipes-kernel/linux/linux-yocto_virtualization.inc
@@ -112,3 +112,6 @@ KERNEL_FEATURES:append = "${@distro_cond_feature('cgl/features/selinux/selinux.c
 
 # vcontainer
 KERNEL_FEATURES:append = "${@distro_cond_feature('cfg/container.scc', 'vcontainer', d)}"
+
+# vxn: Xen PV guest support for vcontainer-on-Xen
+SRC_URI += "${@bb.utils.contains('DISTRO_FEATURES', 'vxn', ' file://vxn.cfg', '', d)}"