platform/x86/intel/vsec: Prep for ACPI PMT discovery

From:		"David E. Box" <david.e.box-AT-linux.intel.com>
To:		thomas.hellstrom-AT-linux.intel.com, rodrigo.vivi-AT-intel.com, irenic.rajneesh-AT-gmail.com, ilpo.jarvinen-AT-linux.intel.com, srinivas.pandruvada-AT-linux.intel.com, intel-xe-AT-lists.freedesktop.org, dri-devel-AT-lists.freedesktop.org, xi.pardee-AT-linux.intel.com
Subject:		[PATCH v2 0/6] platform/x86/intel/vsec: Prep for ACPI PMT discovery
Date:		Wed, 21 Jan 2026 17:49:41 -0800
Message-ID:		<20260122014948.3158069-1-david.e.box@linux.intel.com>
Cc:		"David E. Box" <david.e.box-AT-linux.intel.com>, hansg-AT-kernel.org, linux-kernel-AT-vger.kernel.org, platform-driver-x86-AT-vger.kernel.org
Archive-link:		Article

This series updates intel_vsec to improve const-correctness, decouple
helper APIs from PCI, enhance error handling, and plumb ACPI-based Intel
Platform Monitoring Technology (PMT) discovery through the vsec layer. It
is preparatory infrastructure for follow-on PMT core/telemetry and
PMC/SSRAM series that add ACPI discovery and support for new platforms.

The series is organized as follows:

Patches 1-2 refactor and improve const-correctness of base_addr handling.
Patch 1 makes base_addr an explicit parameter throughout the call chain,
clarifying ownership and removing conditional logic. Patch 2 then makes the
platform info data structure read-only, preventing unintended modifications
to shared driver data.

Patches 3-4 decouple the vsec layer from PCI-specific types, updating
helper APIs and data structures to use generic struct device instead of
struct pci_dev.  This enables vsec to work with both PCI and ACPI parent
devices.

Patch 5 enhances error visibility by returning meaningful error codes from
the registration path instead of collapsing to boolean success/failure.

Patch 6 adds infrastructure for ACPI-based PMT discovery, allowing client
drivers to consume discovery data from either PCI or ACPI sources.

David E. Box (6):
  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

 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                  |   2 +-
 drivers/platform/x86/intel/pmc/core.c         |   4 +-
 .../platform/x86/intel/pmc/ssram_telemetry.c  |   2 +-
 drivers/platform/x86/intel/pmt/class.c        |   8 +-
 drivers/platform/x86/intel/pmt/class.h        |   5 +-
 drivers/platform/x86/intel/pmt/discovery.c    |   4 +-
 drivers/platform/x86/intel/pmt/telemetry.c    |  13 +-
 drivers/platform/x86/intel/pmt/telemetry.h    |  12 +-
 drivers/platform/x86/intel/sdsi.c             |   5 +-
 drivers/platform/x86/intel/vsec.c             | 114 +++++++++++-------
 drivers/platform/x86/intel/vsec_tpmi.c        |  10 +-
 include/linux/intel_vsec.h                    |  39 ++++--
 15 files changed, 136 insertions(+), 93 deletions(-)


base-commit: 0f61b1860cc3f52aef9036d7235ed1f017632193
-- 
2.43.0