1 files changed, 16 insertions, 0 deletions

diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 3a4ab0b4dcca..d5284c491aef 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -14,6 +14,7 @@
 
 #include <asm/xen/hypervisor.h>
 
+#include <xen/features.h>
 #include <xen/events.h>
 #include <asm/xen/pci.h>
 
@@ -184,3 +185,18 @@ int __init pci_xen_init(void)
 #endif
         return 0;
 }
+
+int __init pci_xen_hvm_init(void)
+{
+        if (!xen_feature(XENFEAT_hvm_pirqs))
+                return 0;
+
+#ifdef CONFIG_ACPI
+        /*
+         * We don't want to change the actual ACPI delivery model,
+         * just how GSIs get registered.
+         */
+        __acpi_register_gsi = acpi_register_gsi_xen_hvm;
+#endif
+        return 0;
+}