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path: root/drivers/platform/x86/intel/pmt/Kconfig
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9 daysplatform/x86/intel/pmt: fix build dependency for kunit testArnd Bergmann
When INTEL_PMT_TELEMETRY is in a loadable module, the discovery test cannot be built-in: x86_64-linux-ld: drivers/platform/x86/intel/pmt/discovery-kunit.o: in function `test_intel_pmt_get_regions_by_feature': discovery-kunit.c:(.text+0x29d): undefined reference to `intel_pmt_get_regions_by_feature' x86_64-linux-ld: discovery-kunit.c:(.text+0x2c3): undefined reference to `intel_pmt_put_feature_group' Add a Kconfig dependency to prevent this. Fixes: b9707d46a959 ("platform/x86/intel/pmt: KUNIT test for PMT Enhanced Discovery API") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20250714081559.4056777-1-arnd@kernel.org Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
2025-07-03platform/x86/intel/pmt: KUNIT test for PMT Enhanced Discovery APIDavid E. Box
Adds a KUNIT test for the intel_pmt_get_regions_by_feature() API. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://lore.kernel.org/r/20250703022832.1302928-16-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>
2025-07-03platform/x86/intel/pmt/discovery: Get telemetry attributesDavid E. Box
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>
2025-07-03platform/x86/intel/pmt: Add PMT Discovery driverDavid E. Box
This patch introduces a new driver to enumerate and expose Intel Platform Monitoring Technology (PMT) capabilities via a simple discovery mechanism. The PMT Discovery driver parses hardware-provided discovery tables from Intel Out of Band Management Services Modules (OOBMSM) and extracts feature information for various providers (such as TPMI, Telemetry, Crash Log, etc). This unified interface simplifies the process of determining which manageability and telemetry features are supported by a given platform. This new feature is described in the Intel Platform Monitoring Technology 3.0 specification, section 6.6 Capability. Key changes and additions: New file drivers/platform/x86/intel/pmt/discovery.c: – Implements the discovery logic to map the discovery resource, read the feature discovery table, and validate feature parameters. New file drivers/platform/x86/intel/pmt/features.c: – Defines feature names, layouts, and associated capability masks. – Provides a mapping between raw hardware attributes and sysfs representations for easier integration with user-space tools. New header include/linux/intel_pmt_features.h: – Declares constants, masks, and feature identifiers used across the PMT framework. Sysfs integration: – Feature attributes are exposed under /sys/class/intel_pmt. – Each device is represented by a subfolder within the intel_pmt class, named using its DBDF (Domain:Bus:Device.Function), e.g.: features-0000:00:03.1 – Example directory layout for a device: /sys/class/intel_pmt/features-0000:00:03.1/ ├── accelerator_telemetry ├── crash_log ├── per_core_environment_telemetry ├── per_core_performance_telemetry ├── per_rmid_energy_telemetry ├── per_rmid_perf_telemetry ├── tpmi_control ├── tracing └── uncore_telemetry By exposing PMT feature details through sysfs and integrating with the existing PMT class, this driver paves the way for more streamlined integration of PMT-based manageability and telemetry tools. Link: https://www.intel.com/content/www/us/en/content-details/710389/intel-platform-monitoring-technology-intel-pmt-external-specification.html Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://lore.kernel.org/r/20250703022832.1302928-9-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>
2021-12-22platform/x86/intel: Move intel_pmt from MFD to Auxiliary BusDavid E. Box
Intel Platform Monitoring Technology (PMT) support is indicated by presence of an Intel defined PCIe Designated Vendor Specific Extended Capabilities (DVSEC) structure with a PMT specific ID. The current MFD implementation creates child devices for each PMT feature, currently telemetry, watcher, and crashlog. However DVSEC structures may also be used by Intel to indicate support for other features. The Out Of Band Management Services Module (OOBMSM) uses DVSEC to enumerate several features, including PMT. In order to support them it is necessary to modify the intel_pmt driver to handle the creation of the child devices more generically. To that end, modify the driver to create child devices for any VSEC/DVSEC features on supported devices (indicated by PCI ID). Additionally, move the implementation from MFD to the Auxiliary bus. VSEC/DVSEC features are really multifunctional PCI devices, not platform devices as MFD was designed for. Auxiliary bus gives more flexibility by allowing the definition of custom structures that can be shared between associated auxiliary devices and the parent device. Also, rename the driver from intel_pmt to intel_vsec to better reflect the purpose. This series also removes the current runtime pm support which was not complete to begin with. None of the current devices require runtime pm. However the support will be replaced when a device is added that requires it. Reviewed-by: Mark Gross <markgross@kernel.org> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://lore.kernel.org/r/20211208015015.891275-4-david.e.box@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-06platform/x86/intel: Move Intel PMT drivers to new subfolderDavid E. Box
Move all Intel Platform Monitoring Technology drivers to drivers/platform/x86/intel/pmt. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20210727164928.3171521-1-david.e.box@linux.intel.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>