[PATCH v8 12/16] 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.  Register the telemetry enumeration function
pointers at pmt_telemetry module .probe(), and unregister them at module
.remove().

Note that checkpatch complains about the #include of <asm/resctrl.h>.
This is needed rather than <linux/resctrl.h> to get the function stub
definitions when CONFIG_X86_CPU_RESCTRL=n.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
v8:
	Move register/unregister calls to .probe()/.remove()

 drivers/platform/x86/intel/pmt/telemetry.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/platform/x86/intel/pmt/telemetry.c b/drivers/platform/x86/intel/pmt/telemetry.c
index daa6da9bad2a..fa4033f94d2f 100644
--- a/drivers/platform/x86/intel/pmt/telemetry.c
+++ b/drivers/platform/x86/intel/pmt/telemetry.c
@@ -25,6 +25,8 @@
 #include <linux/uaccess.h>
 #include <linux/xarray.h>
 
+#include <asm/resctrl.h>
+
 #include "class.h"
 
 #define TELEM_SIZE_OFFSET	0x0
@@ -365,6 +367,8 @@ static void pmt_telem_remove(struct auxiliary_device *auxdev)
 	struct pmt_telem_priv *priv = auxiliary_get_drvdata(auxdev);
 	int i;
 
+	intel_aet_unregister_enumeration();
+
 	mutex_lock(&ep_lock);
 	for (i = 0; i < priv->num_entries; i++) {
 		struct intel_pmt_entry *entry = &priv->entry[i];
@@ -405,6 +409,8 @@ static int pmt_telem_probe(struct auxiliary_device *auxdev, const struct auxilia
 		intel_pmt_get_features(entry);
 	}
 
+	intel_aet_register_enumeration(THIS_MODULE, intel_pmt_get_regions_by_feature,
+				       intel_pmt_put_feature_group);
 	return 0;
 abort_probe:
 	pmt_telem_remove(auxdev);
-- 
2.54.0