pcie: Fast PCIe root ports for new machines

Change the default speed and width for new machine types to the
fastest and widest currently supported.  This should be compatible to
the PCIe 4.0 spec.  Pre-QEMU-4.0 machine types remain at 2.5GT/s, x1
width.

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/pci-bridge/gen_pcie_root_port.c b/hw/pci-bridge/gen_pcie_root_port.c
index ca5418a89dd2f857a040b34a538a7b0cedb52c23..9766edb4459683cbbfc24ed94db3302f892c7443 100644 (file)
--- a/hw/pci-bridge/gen_pcie_root_port.c
+++ b/hw/pci-bridge/gen_pcie_root_port.c
@@ -125,9 +125,9 @@ static Property gen_rp_props[] = {
     DEFINE_PROP_SIZE("pref64-reserve", GenPCIERootPort,
                      res_reserve.mem_pref_64, -1),
     DEFINE_PROP_PCIE_LINK_SPEED("x-speed", PCIESlot,
-                                speed, PCIE_LINK_SPEED_2_5),
+                                speed, PCIE_LINK_SPEED_16),
     DEFINE_PROP_PCIE_LINK_WIDTH("x-width", PCIESlot,
-                                width, PCIE_LINK_WIDTH_1),
+                                width, PCIE_LINK_WIDTH_32),
     DEFINE_PROP_END_OF_LIST()
 };
 

diff --git a/include/hw/compat.h b/include/hw/compat.h
index 70958328fe7a5e219da929948d485d283b4a305f..3ca85b037c042f076da5e58fa45603ae74c506e7 100644 (file)
--- a/include/hw/compat.h
+++ b/include/hw/compat.h
@@ -2,7 +2,15 @@
 #define HW_COMPAT_H
 
 #define HW_COMPAT_3_1 \
-    /* empty */
+    {\
+        .driver   = "pcie-root-port",\
+        .property = "x-speed",\
+        .value    = "2_5",\
+    },{\
+        .driver   = "pcie-root-port",\
+        .property = "x-width",\
+        .value    = "1",\
+    },
 
 #define HW_COMPAT_3_0 \
     /* empty */