hw/scsi: Introduce VHOST_SCSI_COMMON symbol in Kconfig

Instead of adding 'vhost-scsi-common.c' twice (for VHOST_SCSI and
VHOST_USER_SCSI), have it depend on VHOST_SCSI_COMMON, selected by
both symbols.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230524093744.88442-3-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

hw/scsi/Kconfig

@@ -48,13 +48,19 @@ config VIRTIO_SCSI
     depends on VIRTIO
     select SCSI
 
+config VHOST_SCSI_COMMON
+    bool
+    depends on VIRTIO
+
 config VHOST_SCSI
     bool
     default y
+    select VHOST_SCSI_COMMON
     depends on VIRTIO && VHOST_KERNEL
 
 config VHOST_USER_SCSI
     bool
     # Only PCI devices are provided for now
     default y if VIRTIO_PCI
+    select VHOST_SCSI_COMMON
     depends on VIRTIO && VHOST_USER && LINUX

hw/scsi/meson.build

@@ -17,8 +17,10 @@ specific_scsi_ss = ss.source_set()
 
 virtio_scsi_ss = ss.source_set()
 virtio_scsi_ss.add(files('virtio-scsi.c', 'virtio-scsi-dataplane.c'))
-virtio_scsi_ss.add(when: 'CONFIG_VHOST_SCSI', if_true: files('vhost-scsi-common.c', 'vhost-scsi.c'))
-virtio_scsi_ss.add(when: 'CONFIG_VHOST_USER_SCSI', if_true: files('vhost-scsi-common.c', 'vhost-user-scsi.c'))
+
+virtio_scsi_ss.add(when: 'CONFIG_VHOST_SCSI_COMMON', if_true: files('vhost-scsi-common.c'))
+virtio_scsi_ss.add(when: 'CONFIG_VHOST_SCSI', if_true: files('vhost-scsi.c'))
+virtio_scsi_ss.add(when: 'CONFIG_VHOST_USER_SCSI', if_true: files('vhost-user-scsi.c'))
 specific_scsi_ss.add_all(when: 'CONFIG_VIRTIO_SCSI', if_true: virtio_scsi_ss)
 
 specific_scsi_ss.add(when: 'CONFIG_SPAPR_VSCSI', if_true: files('spapr_vscsi.c'))