vcontainer: add sanity checks and auto-enable virtfs for QEMU

Fix virtio-9p (virtfs) support for container-cross-install batch
imports which provides ~50x speedup over base64-over-serial.

The issue was that native recipes don't see target DISTRO_FEATURES,
so qemu-system-native wasn't getting virtfs enabled.

Fix by:
- layer.conf: Propagate virtualization to DISTRO_FEATURES_NATIVE when
  vcontainer or virtualization is in target DISTRO_FEATURES
- qemu-system-native: Check DISTRO_FEATURES_NATIVE for virtfs enable
- container-cross-install: Prepend native sysroot to PATH so vrunner
  finds the QEMU with virtfs support

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

1 files changed, 4 insertions, 2 deletions

diff --git a/recipes-devtools/qemu/qemu-system-native_%.bbappend b/recipes-devtools/qemu/qemu-system-native_%.bbappend
index d360af80..b04b6934 100644
--- a/recipes-devtools/qemu/qemu-system-native_%.bbappend
+++ b/recipes-devtools/qemu/qemu-system-native_%.bbappend
@@ -5,6 +5,8 @@
 # Enable virtfs (virtio-9p) for vcontainer cross-architecture container bundling.
 # This is required for the fast batch-import path in container-cross-install.
 #
-# Only applied when "vcontainer" or "virtualization" is in DISTRO_FEATURES.
+# Note: Native recipes don't see target DISTRO_FEATURES directly.
+# The layer.conf propagates virtualization to DISTRO_FEATURES_NATIVE when
+# vcontainer or virtualization is in the target DISTRO_FEATURES.
 
-PACKAGECONFIG:append = " ${@bb.utils.contains_any('DISTRO_FEATURES', 'vcontainer virtualization', 'virtfs', '', d)}"
+PACKAGECONFIG:append = " ${@bb.utils.contains('DISTRO_FEATURES_NATIVE', 'virtualization', 'virtfs', '', d)}"