[PATCH v2 2/7] firmware: coreboot: Generate aliases for coreboot modules

Nícolas F. R. A. Prado
2024-01-12T13:21:22Z

Generate aliases for coreboot modules to allow automatic module probing.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---

(no changes since v1)

include/linux/mod_devicetable.h | 8 ++++++++
scripts/mod/devicetable-offsets.c | 3 +++
scripts/mod/file2alias.c | 10 ++++++++++
3 files changed, 21 insertions(+)

diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index f458469c5ce5..24e0dcfde809 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -960,4 +960,12 @@ struct vchiq_device_id {
char name[32];
};

+/**
+ * struct coreboot_device_id - Identifies a coreboot table entry
+ * @tag: tag ID
+ */
+struct coreboot_device_id {
+ __u32 tag;
+};
+
#endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index e91a3c38143b..518200813d4e 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -274,5 +274,8 @@ int main(void)
DEVID(vchiq_device_id);
DEVID_FIELD(vchiq_device_id, name);

+ DEVID(coreboot_device_id);
+ DEVID_FIELD(coreboot_device_id, tag);
+
return 0;
}
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 4829680a0a6d..5d1c61fa5a55 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1494,6 +1494,15 @@ static int do_vchiq_entry(const char *filename, void *symval, char *alias)
return 1;
}

+/* Looks like: coreboot:tN */
+static int do_coreboot_entry(const char *filename, void *symval, char *alias)
+{
+ DEF_FIELD(symval, coreboot_device_id, tag);
+ sprintf(alias, "coreboot:t%08X", tag);
+
+ return 1;
+}
+
/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
{
@@ -1575,6 +1584,7 @@ static const struct devtable devtable[] = {
{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
{"cdx", SIZE_cdx_device_id, do_cdx_entry},
{"vchiq", SIZE_vchiq_device_id, do_vchiq_entry},
+ {"coreboot", SIZE_coreboot_device_id, do_coreboot_entry},
};

/* Create MODULE_ALIAS() statements.
--
2.43.0