[PATCH] hw/ppc/Kconfig: Imply VFIO_PCI

["Cédric Le Goater" <clg@redhat.com>]

When the legacy and iommufd backends were introduced, a set of common
vfio-pci routines were exported in pci.c for both backends to use :

  vfio_pci_pre_reset
  vfio_pci_get_pci_hot_reset_info
  vfio_pci_host_match
  vfio_pci_post_reset

This introduced a build failure on PPC when --without-default-devices
is use because VFIO is always selected in ppc/Kconfig but VFIO_PCI is
not.

Use an 'imply VFIO_PCI' in ppc/Kconfig and bypass compilation of the
VFIO EEH hooks routines defined in hw/ppc/spapr_pci_vfio.c with
CONFIG_VFIO_PCI.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/ppc/spapr_pci_vfio.c | 36 ++++++++++++++++++++++++++++++++++++
 hw/ppc/Kconfig          |  2 +-
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/spapr_pci_vfio.c b/hw/ppc/spapr_pci_vfio.c
index d1d07bec4644da4ae6a99d3357d6d17ff66264de..76b2a3487b5d6f21528e9c301341eb27bc8fec1d 100644
--- a/hw/ppc/spapr_pci_vfio.c
+++ b/hw/ppc/spapr_pci_vfio.c
@@ -26,10 +26,12 @@
 #include "hw/pci/pci_device.h"
 #include "hw/vfio/vfio-common.h"
 #include "qemu/error-report.h"
+#include CONFIG_DEVICES /* CONFIG_VFIO_PCI */
 
 /*
  * Interfaces for IBM EEH (Enhanced Error Handling)
  */
+#ifdef CONFIG_VFIO_PCI
 static bool vfio_eeh_container_ok(VFIOContainer *container)
 {
     /*
@@ -314,3 +316,37 @@ int spapr_phb_vfio_eeh_configure(SpaprPhbState *sphb)
 
     return RTAS_OUT_SUCCESS;
 }
+
+#else
+
+bool spapr_phb_eeh_available(SpaprPhbState *sphb)
+{
+    return false;
+}
+
+void spapr_phb_vfio_reset(DeviceState *qdev)
+{
+}
+
+int spapr_phb_vfio_eeh_set_option(SpaprPhbState *sphb,
+                                  unsigned int addr, int option)
+{
+    return RTAS_OUT_NOT_SUPPORTED;
+}
+
+int spapr_phb_vfio_eeh_get_state(SpaprPhbState *sphb, int *state)
+{
+    return RTAS_OUT_NOT_SUPPORTED;
+}
+
+int spapr_phb_vfio_eeh_reset(SpaprPhbState *sphb, int option)
+{
+    return RTAS_OUT_NOT_SUPPORTED;
+}
+
+int spapr_phb_vfio_eeh_configure(SpaprPhbState *sphb)
+{
+    return RTAS_OUT_NOT_SUPPORTED;
+}
+
+#endif /* CONFIG_VFIO_PCI */
diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig
index 56f0475a8e2e46e433d9df02460aec65e26d77a5..44263a58c4d3202afbe8bb44c67701bded855a57 100644
--- a/hw/ppc/Kconfig
+++ b/hw/ppc/Kconfig
@@ -3,11 +3,11 @@ config PSERIES
     imply PCI_DEVICES
     imply TEST_DEVICES
     imply VIRTIO_VGA
+    imply VFIO_PCI if LINUX   # needed by spapr_pci_vfio.c
     select NVDIMM
     select DIMM
     select PCI
     select SPAPR_VSCSI
-    select VFIO if LINUX   # needed by spapr_pci_vfio.c
     select XICS
     select XIVE
     select MSI_NONBROKEN
-- 
2.42.0