[PATCH] configure: Fix build dependencies with vhost-vdpa.

[Laurent Vivier <lvivier@redhat.com>]

Following the same logic as for vhost-net-user and vhost-kernel,
enable vhost-net if vhost-net-vdpa is enabled and vhost-net is not
explicitly disabled.
See 299e6f19b3e2 ("vhost-net: revamp configure logic")

Autoselect VHOST if VHOST_VDPA is set
See 21c6b0c87e85 ("configure: simplify vhost condition with Kconfig")
See 2becc36a3e53 ("meson: infrastructure for building emulators"

Problems can be triggered using;
... --enable-vhost-vdpa --disable-vhost-user --disable-vhost-kernel ...

Fixes: 108a64818e69 ("vhost-vdpa: introduce vhost-vdpa backend")
Cc: lulu@redhat.com
Cc: pbonzini@redhat.com
Cc: marcandre.lureau@redhat.com
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
 Kconfig.host | 4 ++++
 configure    | 3 ++-
 meson.build  | 1 +
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Kconfig.host b/Kconfig.host
index 4af19bf70ef9..a9a55a9c315c 100644
--- a/Kconfig.host
+++ b/Kconfig.host
@@ -24,6 +24,10 @@ config VHOST_USER
     bool
     select VHOST
 
+config VHOST_VDPA
+    bool
+    select VHOST
+
 config VHOST_KERNEL
     bool
     select VHOST
diff --git a/configure b/configure
index e8e8e984f245..8ee15810c882 100755
--- a/configure
+++ b/configure
@@ -2494,9 +2494,10 @@ if test "$vhost_net_vdpa" = "yes" && test "$vhost_vdpa" = "no"; then
   error_exit "--enable-vhost-net-vdpa requires --enable-vhost-vdpa"
 fi
 
-# OR the vhost-kernel and vhost-user values for simplicity
+# OR the vhost-kernel, vhost-vdpa and vhost-user values for simplicity
 if test "$vhost_net" = ""; then
   test "$vhost_net_user" = "yes" && vhost_net=yes
+  test "$vhost_net_vdpa" = "yes" && vhost_net=yes
   test "$vhost_kernel" = "yes" && vhost_net=yes
 fi
 
diff --git a/meson.build b/meson.build
index f4d1ab109680..488ca205fad2 100644
--- a/meson.build
+++ b/meson.build
@@ -521,6 +521,7 @@ kconfig_external_symbols = [
   'CONFIG_OPENGL',
   'CONFIG_X11',
   'CONFIG_VHOST_USER',
+  'CONFIG_VHOST_VDPA',
   'CONFIG_VHOST_KERNEL',
   'CONFIG_VIRTFS',
   'CONFIG_LINUX',
-- 
2.26.2