platform/x86/intel/pmt/discovery: Get telemetry attributes

Add intel_pmt_get_features() in PMT Discovery to enable the PMT Telemetry
driver to obtain attributes of the aggregated telemetry spaces it
enumerates. The function gathers feature flags and associated data (like
the number of RMIDs) from each PMT entry, laying the groundwork for a
future kernel interface that will allow direct access to telemetry regions
based on their capabilities.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20250703022832.1302928-14-david.e.box@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/intel_vsec.h b/include/linux/intel_vsec.h
index 4bd0c6e7857c..f185e9c01c90 100644
--- a/include/linux/intel_vsec.h
+++ b/include/linux/intel_vsec.h
@@ -4,6 +4,7 @@
 
 #include <linux/auxiliary_bus.h>
 #include <linux/bits.h>
+#include <linux/intel_pmt_features.h>
 
 /*
  * VSEC_CAP_UNUSED is reserved. It exists to prevent zero initialized
@@ -166,6 +167,21 @@ struct oobmsm_plat_info {
 	u8 function_number;
 };
 
+struct telemetry_region {
+	struct oobmsm_plat_info	plat_info;
+	void __iomem		*addr;
+	size_t			size;
+	u32			guid;
+	u32			num_rmids;
+};
+
+struct pmt_feature_group {
+	enum pmt_feature_id	id;
+	int			count;
+	struct kref		kref;
+	struct telemetry_region	regions[];
+};
+
 int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent,
 		       struct intel_vsec_device *intel_vsec_dev,
 		       const char *name);