diff --git a/tools/include/xen-sys/Linux/privcmd.h b/tools/include/xen-sys/Linux/privcmd.h
index bc60e8fd55..607dfa2287 100644
--- a/tools/include/xen-sys/Linux/privcmd.h
+++ b/tools/include/xen-sys/Linux/privcmd.h
@@ -95,6 +95,11 @@ typedef struct privcmd_mmap_resource {
 	__u64 addr;
 } privcmd_mmap_resource_t;
 
+typedef struct privcmd_pcidev_get_gsi {
+	__u32 sbdf;
+	__u32 gsi;
+} privcmd_pcidev_get_gsi_t;
+
 /*
  * @cmd: IOCTL_PRIVCMD_HYPERCALL
  * @arg: &privcmd_hypercall_t
@@ -114,6 +119,8 @@ typedef struct privcmd_mmap_resource {
 	_IOC(_IOC_NONE, 'P', 6, sizeof(domid_t))
 #define IOCTL_PRIVCMD_MMAP_RESOURCE				\
 	_IOC(_IOC_NONE, 'P', 7, sizeof(privcmd_mmap_resource_t))
+#define IOCTL_PRIVCMD_PCIDEV_GET_GSI			\
+	_IOC(_IOC_NONE, 'P', 10, sizeof(privcmd_pcidev_get_gsi_t))
 #define IOCTL_PRIVCMD_UNIMPLEMENTED				\
 	_IOC(_IOC_NONE, 'P', 0xFF, 0)
 
diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h
index 2c4608c09a..924f9a35f7 100644
--- a/tools/include/xenctrl.h
+++ b/tools/include/xenctrl.h
@@ -1642,6 +1642,8 @@ int xc_physdev_unmap_pirq(xc_interface *xch,
                           uint32_t domid,
                           int pirq);
 
+int xc_pcidev_get_gsi(xc_interface *xch, uint32_t sbdf);
+
 /*
  *  LOGGING AND ERROR REPORTING
  */
diff --git a/tools/libs/ctrl/xc_freebsd.c b/tools/libs/ctrl/xc_freebsd.c
index 9dd48a3a08..9019fc6633 100644
--- a/tools/libs/ctrl/xc_freebsd.c
+++ b/tools/libs/ctrl/xc_freebsd.c
@@ -60,6 +60,12 @@ void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
     return ptr;
 }
 
+int xc_pcidev_get_gsi(xc_interface *xch, uint32_t sbdf)
+{
+    errno = ENOSYS;
+    return -1;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libs/ctrl/xc_linux.c b/tools/libs/ctrl/xc_linux.c
index c67c71c08b..92591e49a1 100644
--- a/tools/libs/ctrl/xc_linux.c
+++ b/tools/libs/ctrl/xc_linux.c
@@ -66,6 +66,26 @@ void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
     return ptr;
 }
 
+int xc_pcidev_get_gsi(xc_interface *xch, uint32_t sbdf)
+{
+    int ret;
+    privcmd_pcidev_get_gsi_t dev_gsi = {
+        .sbdf = sbdf,
+        .gsi = 0,
+    };
+
+    ret = ioctl(xencall_fd(xch->xcall),
+                IOCTL_PRIVCMD_PCIDEV_GET_GSI, &dev_gsi);
+
+    if (ret < 0) {
+        PERROR("Failed to get gsi from dev");
+    } else {
+        ret = dev_gsi.gsi;
+    }
+
+    return ret;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libs/ctrl/xc_minios.c b/tools/libs/ctrl/xc_minios.c
index 3dea7a78a5..462af827b3 100644
--- a/tools/libs/ctrl/xc_minios.c
+++ b/tools/libs/ctrl/xc_minios.c
@@ -47,6 +47,12 @@ void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
     return memalign(alignment, size);
 }
 
+int xc_pcidev_get_gsi(xc_interface *xch, uint32_t sbdf)
+{
+    errno = ENOSYS;
+    return -1;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libs/ctrl/xc_netbsd.c b/tools/libs/ctrl/xc_netbsd.c
index 3197993762..1318d4d906 100644
--- a/tools/libs/ctrl/xc_netbsd.c
+++ b/tools/libs/ctrl/xc_netbsd.c
@@ -63,6 +63,12 @@ void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
     return valloc(size);
 }
 
+int xc_pcidev_get_gsi(xc_interface *xch, uint32_t sbdf)
+{
+    errno = ENOSYS;
+    return -1;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libs/ctrl/xc_solaris.c b/tools/libs/ctrl/xc_solaris.c
index 5128f3f0f4..049e28d55c 100644
--- a/tools/libs/ctrl/xc_solaris.c
+++ b/tools/libs/ctrl/xc_solaris.c
@@ -32,6 +32,12 @@ void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
     return memalign(alignment, size);
 }
 
+int xc_pcidev_get_gsi(xc_interface *xch, uint32_t sbdf)
+{
+    errno = ENOSYS;
+    return -1;
+}
+
 /*
  * Local variables:
  * mode: C