hw/s390x/s390-pci-vfio: Avoid including CONFIG_DEVICES in hw/ header

By turning the inline functions into stubs we can avoid the
use of target-specific CONFIG_DEVICES include in a hw/ header,
allowing to build the source files including it as common objects.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Farhan Ali<alifm@linux.ibm.com>
Message-Id: <20260225031658.32095-4-philmd@linaro.org>

hw/s390x/meson.build

@@ -34,6 +34,7 @@ s390x_ss.add(when: 'CONFIG_S390_CCW_VIRTIO', if_true: files(
 ))
 s390x_ss.add(when: 'CONFIG_TERMINAL3270', if_true: files('3270-ccw.c'))
 s390x_ss.add(when: 'CONFIG_VFIO', if_true: files('s390-pci-vfio.c'))
+stub_ss.add(files('s390-pci-vfio-stubs.c'))
 s390x_ss.add(when: 'CONFIG_VFIO_AP', if_false: files('ap-stub.c'))
 
 virtio_ss = ss.source_set()

hw/s390x/s390-pci-vfio-stubs.c

@@ -0,0 +1,32 @@
+/*
+ * s390 vfio-pci stubs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "hw/s390x/s390-pci-vfio.h"
+
+bool s390_pci_update_dma_avail(int fd, unsigned int *avail)
+{
+    return false;
+}
+
+S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
+                                          S390PCIBusDevice *pbdev)
+{
+    return NULL;
+}
+
+void s390_pci_end_dma_count(S390pciState *s, S390PCIDMACount *cnt)
+{
+}
+
+bool s390_pci_get_host_fh(S390PCIBusDevice *pbdev, uint32_t *fh)
+{
+    return false;
+}
+
+void s390_pci_get_clp_info(S390PCIBusDevice *pbdev)
+{
+}

include/hw/s390x/s390-pci-vfio.h

@@ -13,32 +13,12 @@
 #define HW_S390_PCI_VFIO_H
 
 #include "hw/s390x/s390-pci-bus.h"
-#include CONFIG_DEVICES
 
-#ifdef CONFIG_VFIO
 bool s390_pci_update_dma_avail(int fd, unsigned int *avail);
 S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
                                           S390PCIBusDevice *pbdev);
 void s390_pci_end_dma_count(S390pciState *s, S390PCIDMACount *cnt);
 bool s390_pci_get_host_fh(S390PCIBusDevice *pbdev, uint32_t *fh);
 void s390_pci_get_clp_info(S390PCIBusDevice *pbdev);
-#else
-static inline bool s390_pci_update_dma_avail(int fd, unsigned int *avail)
-{
-    return false;
-}
-static inline S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
-                                                        S390PCIBusDevice *pbdev)
-{
-    return NULL;
-}
-static inline void s390_pci_end_dma_count(S390pciState *s,
-                                          S390PCIDMACount *cnt) { }
-static inline bool s390_pci_get_host_fh(S390PCIBusDevice *pbdev, uint32_t *fh)
-{
-    return false;
-}
-static inline void s390_pci_get_clp_info(S390PCIBusDevice *pbdev) { }
-#endif
 
 #endif