[PATCH v12 17/25] platform/x86/intel/pmt: Register enumeration functions with resctrl

[Tony Luck <tony.luck@intel.com>]

INTEL_PMT_TELEMETRY is a loadable module, but resctrl is built-in and cannot
call PMT functions directly.

Use ".probe_type = PROBE_FORCE_SYNCHRONOUS" to ensure sequential, synchronous
calls to per-device .probe() functions.  Register the telemetry enumeration
function pointers at the end of pmt_telem_init() when all .probe() functions
have run and enumeration is complete.

Unregister at the start of pmt_telem_exit() before teardown of the
auxiliary drivers.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
v12:
	No change
---
 drivers/platform/x86/intel/pmt/telemetry.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/pmt/telemetry.c b/drivers/platform/x86/intel/pmt/telemetry.c
index 953f35b6daec..bf0c9295feb3 100644
--- a/drivers/platform/x86/intel/pmt/telemetry.c
+++ b/drivers/platform/x86/intel/pmt/telemetry.c
@@ -427,16 +427,30 @@ static struct auxiliary_driver pmt_telem_aux_driver = {
 	.id_table	= pmt_telem_id_table,
 	.remove		= pmt_telem_remove,
 	.probe		= pmt_telem_probe,
+	.driver		= {
+		.probe_type = PROBE_FORCE_SYNCHRONOUS,
+	},
 };
 
 static int __init pmt_telem_init(void)
 {
-	return auxiliary_driver_register(&pmt_telem_aux_driver);
+	int ret;
+
+	ret = auxiliary_driver_register(&pmt_telem_aux_driver);
+
+	if (ret)
+		return ret;
+
+	intel_aet_register_enumeration(THIS_MODULE, intel_pmt_get_regions_by_feature,
+				       intel_pmt_put_feature_group);
+
+	return 0;
 }
 module_init(pmt_telem_init);
 
 static void __exit pmt_telem_exit(void)
 {
+	intel_aet_unregister_enumeration();
 	auxiliary_driver_unregister(&pmt_telem_aux_driver);
 	xa_destroy(&telem_array);
 }
-- 
2.55.0