hw/vfio: Compile some common objects once

Some files don't rely on any target-specific knowledge
and can be compiled once:

 - helpers.c
 - container-base.c
 - migration.c (removing unnecessary "exec/ram_addr.h")
 - migration-multifd.c
 - cpr.c

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20250308230917.18907-4-philmd@linaro.org>
Link: https://lore.kernel.org/qemu-devel/20250311085743.21724-6-philmd@linaro.org
Signed-off-by: Cédric Le Goater <clg@redhat.com>

hw/vfio/meson.build

@@ -1,12 +1,7 @@
 vfio_ss = ss.source_set()
 vfio_ss.add(files(
-  'helpers.c',
   'common.c',
-  'container-base.c',
   'container.c',
-  'migration.c',
-  'migration-multifd.c',
-  'cpr.c',
 ))
 vfio_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr.c'))
 vfio_ss.add(when: 'CONFIG_IOMMUFD', if_true: files(
@@ -25,3 +20,11 @@ vfio_ss.add(when: 'CONFIG_VFIO_AP', if_true: files('ap.c'))
 vfio_ss.add(when: 'CONFIG_VFIO_IGD', if_true: files('igd.c'))
 
 specific_ss.add_all(when: 'CONFIG_VFIO', if_true: vfio_ss)
+
+system_ss.add(when: 'CONFIG_VFIO', if_true: files(
+  'helpers.c',
+  'container-base.c',
+  'migration.c',
+  'migration-multifd.c',
+  'cpr.c',
+))

hw/vfio/migration.c

@@ -27,7 +27,6 @@
 #include "qapi/error.h"
 #include "qapi/qapi-events-vfio.h"
 #include "exec/ramlist.h"
-#include "exec/ram_addr.h"
 #include "pci.h"
 #include "trace.h"
 #include "hw/hw.h"