[v2,09/17] hw/pci-bridge/cxl_downstream: Set default link width and link speed

Commit Message

Jonathan Cameron Oct. 23, 2023, 4:07 p.m. UTC

Without these being set the PCIE Link Capabilities register has
invalid values in these two fields.

Signed-off-by: Jonathan Cameron <[e-mail]>
---
 hw/pci-bridge/cxl_downstream.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Patch

diff --git a/hw/pci-bridge/cxl_downstream.c b/hw/pci-bridge/cxl_downstream.c
index 8d99e1e96d..405a133eef 100644
--- a/hw/pci-bridge/cxl_downstream.c
+++ b/hw/pci-bridge/cxl_downstream.c
@@ -210,6 +210,19 @@  static void cxl_dsp_exitfn(PCIDevice *d)
     pci_bridge_exitfn(d);
 }
 
+static void cxl_dsp_instance_post_init(Object *obj)
+{
+    PCIESlot *s = PCIE_SLOT(obj);
+
+    if (!s->speed) {
+        s->speed = QEMU_PCI_EXP_LNK_2_5GT;
+    }
+
+    if (!s->width) {
+        s->width = QEMU_PCI_EXP_LNK_X1;
+    }
+}
+
 static void cxl_dsp_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -230,6 +243,7 @@  static const TypeInfo cxl_dsp_info = {
     .name = TYPE_CXL_DSP,
     .instance_size = sizeof(CXLDownstreamPort),
     .parent = TYPE_PCIE_SLOT,
+    .instance_post_init = cxl_dsp_instance_post_init,
     .class_init = cxl_dsp_class_init,
     .interfaces = (InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },