[Qemu-devel] [PATCH qom-next for-next v2 4/6] pci: Unify vmstate_{pci, pcie}_device

["Andreas Färber" <afaerber@suse.de>]

The only difference so far is the size of the config space.

It is always used through either VMSTATE_{PCI,PCIE}_DEVICE() or
pci_device_save(), so the name change for PCIe shouldn't matter.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 hw/pci-bridge/ioh3420.c            |  2 +-
 hw/pci-bridge/xio3130_downstream.c |  2 +-
 hw/pci-bridge/xio3130_upstream.c   |  2 +-
 hw/pci/pci.c                       | 56 ++++++++++++++++++--------------------
 hw/usb/hcd-xhci.c                  |  2 +-
 include/hw/pci/pcie.h              | 10 -------
 6 files changed, 31 insertions(+), 43 deletions(-)

diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
index 0657354..680a13d 100644
--- a/hw/pci-bridge/ioh3420.c
+++ b/hw/pci-bridge/ioh3420.c
@@ -187,7 +187,7 @@ static const VMStateDescription vmstate_ioh3420 = {
     .minimum_version_id_old = 1,
     .post_load = pcie_cap_slot_post_load,
     .fields = (VMStateField[]) {
-        VMSTATE_PCIE_DEVICE(),
+        VMSTATE_PCI_DEVICE(),
         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
         VMSTATE_END_OF_LIST()
diff --git a/hw/pci-bridge/xio3130_downstream.c b/hw/pci-bridge/xio3130_downstream.c
index 9022949..3fa4ec2 100644
--- a/hw/pci-bridge/xio3130_downstream.c
+++ b/hw/pci-bridge/xio3130_downstream.c
@@ -154,7 +154,7 @@ static const VMStateDescription vmstate_xio3130_downstream = {
     .minimum_version_id_old = 1,
     .post_load = pcie_cap_slot_post_load,
     .fields = (VMStateField[]) {
-        VMSTATE_PCIE_DEVICE(),
+        VMSTATE_PCI_DEVICE(),
         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
         VMSTATE_END_OF_LIST()
diff --git a/hw/pci-bridge/xio3130_upstream.c b/hw/pci-bridge/xio3130_upstream.c
index 046b790..0edacc3 100644
--- a/hw/pci-bridge/xio3130_upstream.c
+++ b/hw/pci-bridge/xio3130_upstream.c
@@ -133,7 +133,7 @@ static const VMStateDescription vmstate_xio3130_upstream = {
     .minimum_version_id = 1,
     .minimum_version_id_old = 1,
     .fields = (VMStateField[]) {
-        VMSTATE_PCIE_DEVICE(),
+        VMSTATE_PCI_DEVICE(),
         VMSTATE_STRUCT(parent_obj.parent_obj.exp.aer_log, PCIEPort, 0,
                        vmstate_pcie_aer_log, PCIEAERLog),
         VMSTATE_END_OF_LIST()
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 4c004f5..6461c9d 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -460,6 +460,20 @@ static VMStateInfo vmstate_info_pci_irq_state = {
     .put  = put_pci_irq_state,
 };
 
+static bool pci_device_express_needed(void *opaque, int version_id)
+{
+    PCIDevice *s = opaque;
+
+    return pci_is_express(s);
+}
+
+static bool pci_device_non_express_needed(void *opaque, int version_id)
+{
+    PCIDevice *s = opaque;
+
+    return !pci_is_express(s);
+}
+
 const VMStateDescription vmstate_pci_device = {
     .name = "PCIDevice",
     .version_id = 2,
@@ -467,38 +481,21 @@ const VMStateDescription vmstate_pci_device = {
     .minimum_version_id_old = 1,
     .fields      = (VMStateField []) {
         VMSTATE_INT32_LE(version_id, PCIDevice),
-        VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
-                                   vmstate_info_pci_config,
-                                   PCI_CONFIG_SPACE_SIZE),
-        VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
-				   vmstate_info_pci_irq_state,
-				   PCI_NUM_PINS * sizeof(int32_t)),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-const VMStateDescription vmstate_pcie_device = {
-    .name = "PCIEDevice",
-    .version_id = 2,
-    .minimum_version_id = 1,
-    .minimum_version_id_old = 1,
-    .fields      = (VMStateField []) {
-        VMSTATE_INT32_LE(version_id, PCIDevice),
-        VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
-                                   vmstate_info_pci_config,
-                                   PCIE_CONFIG_SPACE_SIZE),
+        VMSTATE_BUFFER_UNSAFE_INFO_TEST(config, PCIDevice, 0,
+                                        pci_device_non_express_needed,
+                                        vmstate_info_pci_config,
+                                        PCI_CONFIG_SPACE_SIZE),
+        VMSTATE_BUFFER_UNSAFE_INFO_TEST(config, PCIDevice, 0,
+                                        pci_device_express_needed,
+                                        vmstate_info_pci_config,
+                                        PCIE_CONFIG_SPACE_SIZE),
         VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
-				   vmstate_info_pci_irq_state,
-				   PCI_NUM_PINS * sizeof(int32_t)),
+                                   vmstate_info_pci_irq_state,
+                                   PCI_NUM_PINS * sizeof(int32_t)),
         VMSTATE_END_OF_LIST()
     }
 };
 
-static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s)
-{
-    return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device;
-}
-
 void pci_device_save(PCIDevice *s, QEMUFile *f)
 {
     /* Clear interrupt status bit: it is implicit
@@ -506,7 +503,7 @@ void pci_device_save(PCIDevice *s, QEMUFile *f)
      * This makes us compatible with old devices
      * which never set or clear this bit. */
     s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
-    vmstate_save_state(f, pci_get_vmstate(s), s);
+    vmstate_save_state(f, &vmstate_pci_device, s);
     /* Restore the interrupt status bit. */
     pci_update_irq_status(s);
 }
@@ -514,7 +511,8 @@ void pci_device_save(PCIDevice *s, QEMUFile *f)
 int pci_device_load(PCIDevice *s, QEMUFile *f)
 {
     int ret;
-    ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
+
+    ret = vmstate_load_state(f, &vmstate_pci_device, s, s->version_id);
     /* Restore the interrupt status bit. */
     pci_update_irq_status(s);
     return ret;
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index a22861f..167b58d 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -3544,7 +3544,7 @@ static const VMStateDescription vmstate_xhci = {
     .version_id = 1,
     .post_load = usb_xhci_post_load,
     .fields = (VMStateField[]) {
-        VMSTATE_PCIE_DEVICE(),
+        VMSTATE_PCI_DEVICE(),
         VMSTATE_MSIX(parent_obj, XHCIState),
 
         VMSTATE_STRUCT_VARRAY_UINT32(ports, XHCIState, numports, 1,
diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h
index fc4ebd3..41e2f8c 100644
--- a/include/hw/pci/pcie.h
+++ b/include/hw/pci/pcie.h
@@ -130,14 +130,4 @@ void pcie_add_capability(PCIDevice *dev,
 
 void pcie_ari_init(PCIDevice *dev, uint16_t offset, uint16_t nextfn);
 
-extern const VMStateDescription vmstate_pcie_device;
-
-#define VMSTATE_PCIE_DEVICE() {                                      \
-    .name       = "parent_obj",                                      \
-    .size       = sizeof(PCIDevice),                                 \
-    .vmsd       = &vmstate_pcie_device,                              \
-    .flags      = VMS_STRUCT,                                        \
-    .offset     = 0,                                                 \
-}
-
 #endif /* QEMU_PCIE_H */
-- 
1.8.1.4