[PATCH v4] kconfig: Add PCIe devices to s390x machines

["Cédric Le Goater" <clg@redhat.com>]

It is useful to extend the number of available PCIe devices to KVM guests
for passthrough scenarios and also to expose these models to a different
(big endian) architecture. Introduce a new config PCIE_DEVICES to select
models, Intel Ethernet adapters and one USB controller. These devices all
support MSI-X which is a requirement on s390x as legacy INTx are not
supported.

Cc: Matthew Rosato <mjrosato@linux.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---

 There could be a more general use of PCIE_DEVICES

 v4: Introduce PCIE_DEVICES
 v3: PCI -> PCI_EXPRESS
 v2: select -> imply
 
 configs/devices/s390x-softmmu/default.mak | 1 +
 hw/net/Kconfig                            | 4 ++--
 hw/pci/Kconfig                            | 3 +++
 hw/s390x/Kconfig                          | 3 ++-
 hw/usb/Kconfig                            | 2 +-
 5 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/configs/devices/s390x-softmmu/default.mak b/configs/devices/s390x-softmmu/default.mak
index f2287a133f36..2d5ff476e32a 100644
--- a/configs/devices/s390x-softmmu/default.mak
+++ b/configs/devices/s390x-softmmu/default.mak
@@ -7,6 +7,7 @@
 #CONFIG_VFIO_CCW=n
 #CONFIG_VIRTIO_PCI=n
 #CONFIG_WDT_DIAG288=n
+#CONFIG_PCIE_DEVICE=n
 
 # Boards:
 #
diff --git a/hw/net/Kconfig b/hw/net/Kconfig
index 98e00be4f937..7fcc0d7faa29 100644
--- a/hw/net/Kconfig
+++ b/hw/net/Kconfig
@@ -41,12 +41,12 @@ config E1000_PCI
 
 config E1000E_PCI_EXPRESS
     bool
-    default y if PCI_DEVICES
+    default y if PCI_DEVICES || PCIE_DEVICES
     depends on PCI_EXPRESS && MSI_NONBROKEN
 
 config IGB_PCI_EXPRESS
     bool
-    default y if PCI_DEVICES
+    default y if PCI_DEVICES || PCIE_DEVICES
     depends on PCI_EXPRESS && MSI_NONBROKEN
 
 config RTL8139_PCI
diff --git a/hw/pci/Kconfig b/hw/pci/Kconfig
index 77f8b005ffb1..fe70902cd821 100644
--- a/hw/pci/Kconfig
+++ b/hw/pci/Kconfig
@@ -8,6 +8,9 @@ config PCI_EXPRESS
 config PCI_DEVICES
     bool
 
+config PCIE_DEVICES
+    bool
+
 config MSI_NONBROKEN
     # selected by interrupt controllers that do not support MSI,
     # or support it and have a good implementation. See commit
diff --git a/hw/s390x/Kconfig b/hw/s390x/Kconfig
index 454e0ff4b613..4c068d7960b9 100644
--- a/hw/s390x/Kconfig
+++ b/hw/s390x/Kconfig
@@ -5,7 +5,8 @@ config S390_CCW_VIRTIO
     imply VFIO_AP
     imply VFIO_CCW
     imply WDT_DIAG288
-    select PCI
+    imply PCIE_DEVICES
+    select PCI_EXPRESS
     select S390_FLIC
     select S390_FLIC_KVM if KVM
     select SCLPCONSOLE
diff --git a/hw/usb/Kconfig b/hw/usb/Kconfig
index 0ec6def4b8b8..0f486764ed69 100644
--- a/hw/usb/Kconfig
+++ b/hw/usb/Kconfig
@@ -36,7 +36,7 @@ config USB_XHCI
 
 config USB_XHCI_PCI
     bool
-    default y if PCI_DEVICES
+    default y if PCI_DEVICES || PCIE_DEVICES
     depends on PCI
     select USB_XHCI
 
-- 
2.41.0