Re: [PATCH 00/22] platform/x86/intel: Add ACPI PMT discovery support and enable NVL PMC telemetry

[srinivas pandruvada <srinivas.pandruvada@linux.intel.com>]

On Thu, 2026-03-12 at 18:51 -0700, David E. Box wrote:
> This series adds ACPI-based PMT discovery support and wires it into
> the
> Intel PMC telemetry stack for Nova Lake S.

I think this series is v7, missing patch prefix for versions.

Thanks,
Srinivas

> 
> Today, PMT discovery flow is primarily PCI-oriented. Some platforms
> expose
> PMT discovery via ACPI _DSD, and PMC telemetry needs to consume that
> path
> for both standalone and companion-device cases. This series addresses
> that
> in three logical steps:
> 
>     1. Prepare intel_vsec for ACPI-backed discovery
>     2. Refactor PMT class handling so discovery source is
>        abstracted (PCI or ACPI)
>     3. Add/enable PMC consumers using ACPI discovery, including NVL
>        SSRAM support
> 
> Patches 1–6 were previously posted here:
> https://lore.kernel.org/all/20260303051953.1453372-1-david.e.box@linux.intel.com/
> 
> Series layout
> 
>     01-06: intel_vsec cleanup/generalization for ACPI-capable
> discovery
>            plumbing. Previous changelog up to V7 included.
>            Major patches:
>            Patch 6 - adds ACPI support in VSEC driver
> 
>     07-12: PMT class refactor and ACPI discovery-source support
>            Major patches:
>            Patch 12 - adds ACPI support in PMT driver
> 
>     13-22: PMC driver integration
>            Major patches:
>            Patch 14 - adds new ACPI platform driver
>            Patch 20 - adds ACPI discovery support in ssram driver
>            Patch 22 - adds NVL IDs for SSRAM discovery
> 
> David E. Box (20):
>   platform/x86/intel/vsec: Refactor base_addr handling
>   platform/x86/intel/vsec: Make driver_data info const
>   platform/x86/intel/vsec: Decouple add/link helpers from PCI
>   platform/x86/intel/vsec: Switch exported helpers from pci_dev to
>     device
>   platform/x86/intel/vsec: Return real error codes from registration
>     path
>   platform/x86/intel/vsec: Plumb ACPI PMT discovery tables through
> vsec
>   platform/x86/intel/pmt: Add pre/post decode hooks around header
>     parsing
>   platform/x86/intel/pmt/crashlog: Split init into pre-decode
>   platform/x86/intel/pmt/telemetry: Move overlap check to post-decode
>     hook
>   platform/x86/intel/pmt: Move header decode into common helper
>   platform/x86/intel/pmt: Pass discovery index instead of resource
>   platform/x86/intel/pmt: Unify header fetch and add ACPI source
>   platform/x86/intel/pmc: Add PMC SSRAM Kconfig description
>   platform/x86/intel/pmc: Add ACPI PWRM telemetry driver for Nova
> Lake S
>   platform/x86/intel/pmc/ssram: Rename probe and PCI ID table for
>     consistency
>   platform/x86/intel/pmc/ssram: Refactor DEVID/PWRMBASE extraction
> into
>     helper
>   platform/x86/intel/pmc/ssram: Add PCI platform data
>   platform/x86/intel/pmc/ssram: Add ACPI discovery scaffolding
>   platform/x86/intel/pmc/ssram: Make PMT registration optional
>   platform/x86/intel/pmc: Add NVL PCI IDs for SSRAM telemetry
> discovery
> 
> Xi Pardee (2):
>   platform/x86/intel/pmc/ssram: Use fixed-size static pmc array
>   platform/x86/intel/pmc/ssram: Refactor memory barrier for reentrant
>     probe
> 
>  drivers/gpu/drm/xe/xe_debugfs.c               |   2 +-
>  drivers/gpu/drm/xe/xe_hwmon.c                 |   2 +-
>  drivers/gpu/drm/xe/xe_vsec.c                  |   7 +-
>  drivers/gpu/drm/xe/xe_vsec.h                  |   4 +-
>  drivers/platform/x86/intel/pmc/Kconfig        |  25 ++
>  drivers/platform/x86/intel/pmc/Makefile       |   2 +
>  drivers/platform/x86/intel/pmc/core.c         |   4 +-
>  drivers/platform/x86/intel/pmc/core.h         |  17 ++
>  .../platform/x86/intel/pmc/pwrm_telemetry.c   | 227 ++++++++++++++++
>  .../platform/x86/intel/pmc/ssram_telemetry.c  | 254 ++++++++++++++--
> --
>  drivers/platform/x86/intel/pmt/class.c        | 170 ++++++++++--
>  drivers/platform/x86/intel/pmt/class.h        |  25 +-
>  drivers/platform/x86/intel/pmt/crashlog.c     |  16 +-
>  drivers/platform/x86/intel/pmt/discovery.c    |   4 +-
>  drivers/platform/x86/intel/pmt/telemetry.c    |  45 +---
>  drivers/platform/x86/intel/pmt/telemetry.h    |  12 +-
>  drivers/platform/x86/intel/sdsi.c             |   5 +-
>  drivers/platform/x86/intel/vsec.c             | 121 +++++----
>  drivers/platform/x86/intel/vsec_tpmi.c        |   8 +-
>  include/linux/intel_vsec.h                    |  39 ++-
>  20 files changed, 784 insertions(+), 205 deletions(-)
>  create mode 100644 drivers/platform/x86/intel/pmc/pwrm_telemetry.c
> 
> 
> base-commit: 11439c4635edd669ae435eec308f4ab8a0804808