Revert "hw/pci: disable pci-bridge's shpc by default"

This reverts commit dc0ae76. Disabling the shpc controller has an undesired side effect. The PCI bridge remains with no attached devices at boot time, and the guest operating systems do not allocate any resources for it, leaving the bridge unusable. Note that the behaviour is dictated by the pci bridge specification. Revert the commit and leave the shpc controller even if is not actually used by any architecture. Slot 0 remains unusable at boot time. Keep shpc off for QEMU 2.9 machines. Signed-off-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
qemu · May 17, 2017 · 2fa3566 · 2fa3566
1 parent 8b12e48
commit 2fa3566
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diff --git a/hw/pci-bridge/pci_bridge_dev.c b/hw/pci-bridge/pci_bridge_dev.c
@@ -163,7 +163,7 @@ static Property pci_bridge_dev_properties[] = {
     DEFINE_PROP_ON_OFF_AUTO(PCI_BRIDGE_DEV_PROP_MSI, PCIBridgeDev, msi,
                             ON_OFF_AUTO_AUTO),
     DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_SHPC, PCIBridgeDev, flags,
-                    PCI_BRIDGE_DEV_F_SHPC_REQ, false),
+                    PCI_BRIDGE_DEV_F_SHPC_REQ, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 

diff --git a/include/hw/compat.h b/include/hw/compat.h
@@ -2,7 +2,11 @@
 #define HW_COMPAT_H
 
 #define HW_COMPAT_2_9 \
-    /* empty */
+    {\
+        .driver   = "pci-bridge",\
+        .property = "shpc",\
+        .value    = "off",\
+    },
 
 #define HW_COMPAT_2_8 \
     {\