Add support to parse mdev class id table.

Signed-off-by: Jason Wang <jasow...@redhat.com>
---
 drivers/vfio/mdev/vfio_mdev.c     |  2 ++
 scripts/mod/devicetable-offsets.c |  3 +++
 scripts/mod/file2alias.c          | 10 ++++++++++
 3 files changed, 15 insertions(+)

diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c
index fd2a4d9a3f26..891cf83a2d9a 100644
--- a/drivers/vfio/mdev/vfio_mdev.c
+++ b/drivers/vfio/mdev/vfio_mdev.c
@@ -125,6 +125,8 @@ static struct mdev_class_id id_table[] = {
        { 0 },
 };
 
+MODULE_DEVICE_TABLE(mdev, id_table);
+
 static struct mdev_driver vfio_mdev_driver = {
        .name   = "vfio_mdev",
        .probe  = vfio_mdev_probe,
diff --git a/scripts/mod/devicetable-offsets.c 
b/scripts/mod/devicetable-offsets.c
index 054405b90ba4..6cbb1062488a 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -231,5 +231,8 @@ int main(void)
        DEVID(wmi_device_id);
        DEVID_FIELD(wmi_device_id, guid_string);
 
+       DEVID(mdev_class_id);
+       DEVID_FIELD(mdev_class_id, id);
+
        return 0;
 }
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index c91eba751804..d365dfe7c718 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1335,6 +1335,15 @@ static int do_wmi_entry(const char *filename, void 
*symval, char *alias)
        return 1;
 }
 
+/* looks like: "mdev:cN" */
+static int do_mdev_entry(const char *filename, void *symval, char *alias)
+{
+       DEF_FIELD(symval, mdev_class_id, id);
+
+       sprintf(alias, "mdev:c%02X", id);
+       return 1;
+}
+
 /* Does namelen bytes of name exactly match the symbol? */
 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
 {
@@ -1407,6 +1416,7 @@ static const struct devtable devtable[] = {
        {"typec", SIZE_typec_device_id, do_typec_entry},
        {"tee", SIZE_tee_client_device_id, do_tee_entry},
        {"wmi", SIZE_wmi_device_id, do_wmi_entry},
+       {"mdev", SIZE_mdev_class_id, do_mdev_entry},
 };
 
 /* Create MODULE_ALIAS() statements.
-- 
2.19.1

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