linux.git/drivers/platform/x86/intel/pmc, branch master Linux kernel source tree Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files) 2026-07-03T05:38:17+00:00 Uwe Kleine-König (The Capable Hub) u.kleine-koenig@baylibre.com 2026-06-30T09:24:36+00:00 995832b2cebe6969d1b42635db698803ee31294d Replace the #include of <linux/mod_devicetable.h> by the more specific <linux/device-id/*.h> where applicable. For most cases the include can be dropped completely, only a few drivers need one or two headers added. Acked-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com> 
Replace the #include of <linux/mod_devicetable.h> by the more specific
<linux/device-id/*.h> where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
platform/x86/intel/pmc: Add NVL PCI IDs for SSRAM telemetry discovery 2026-06-14T23:13:17+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:56+00:00 50022e56dc89fbf1ec22826edf03dc2e5b9076cc Add Nova Lake S PMC device IDs to enable binding of the SSRAM telemetry driver on NVL platforms, and map them to the ACPI-based discovery policy. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://patch.msgid.link/fc0e8bb00e2765fb7d145fef2ed1b0236b935c08.1781294741.git.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> 
Add Nova Lake S PMC device IDs to enable binding of the SSRAM telemetry
driver on NVL platforms, and map them to the ACPI-based discovery policy.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://patch.msgid.link/fc0e8bb00e2765fb7d145fef2ed1b0236b935c08.1781294741.git.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>
platform/x86/intel/pmc/ssram: Make PMT registration optional 2026-06-14T23:13:15+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:55+00:00 8a3607ece59fcf84cf4129bdf683cb09122e6b51 The SSRAM telemetry driver extracts essential PMC device ID and power management base address information that intel_pmc_core depends on for core functionality. If PMT registration failure prevents this critical data from being available, intel_pmc_core operation would break entirely. Therefore, PMT registration failures must not block access to this data. Change the behavior to log a warning when PMT registration fails but continue with successful driver initialization, ensuring the primary telemetry data remains accessible to dependent drivers. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://patch.msgid.link/4f4c324977951f6082bf2218c8b911e1ae7e0a7b.1781294741.git.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> 
The SSRAM telemetry driver extracts essential PMC device ID and power
management base address information that intel_pmc_core depends on for core
functionality. If PMT registration failure prevents this critical data from
being available, intel_pmc_core operation would break entirely. Therefore,
PMT registration failures must not block access to this data.

Change the behavior to log a warning when PMT registration fails but
continue with successful driver initialization, ensuring the primary
telemetry data remains accessible to dependent drivers.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://patch.msgid.link/4f4c324977951f6082bf2218c8b911e1ae7e0a7b.1781294741.git.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>
platform/x86/intel/pmc/ssram: Add ACPI discovery scaffolding 2026-06-14T23:13:14+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:54+00:00 08b94937c78aaa144e3afff659c6112bffea6bf0 Prepare the SSRAM telemetry driver for ACPI-based discovery by adding support for reading telemetry regions from ACPI _DSD properties. Add pmc_ssram_telemetry_acpi_init() to parse _DSD for telemetry discovery tables and register them with the Intel VSEC framework. Extend ssram_type with a p_index field to specify which PMC index each ACPI device owns (unlike PCI which discovers all three PMCs from one device). At this stage, no platform IDs are wired to use ACPI discovery - existing devices continue using the PCI path. Follow-on patches will add platform support. Assisted-by: Claude:claude-sonnet-4-5 Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com> Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://patch.msgid.link/54850d175993ee38aef99707f954492d24684dcc.1781294741.git.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> 
Prepare the SSRAM telemetry driver for ACPI-based discovery by adding
support for reading telemetry regions from ACPI _DSD properties.

Add pmc_ssram_telemetry_acpi_init() to parse _DSD for telemetry discovery
tables and register them with the Intel VSEC framework. Extend ssram_type
with a p_index field to specify which PMC index each ACPI device owns
(unlike PCI which discovers all three PMCs from one device).

At this stage, no platform IDs are wired to use ACPI discovery - existing
devices continue using the PCI path. Follow-on patches will add platform
support.

Assisted-by: Claude:claude-sonnet-4-5
Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://patch.msgid.link/54850d175993ee38aef99707f954492d24684dcc.1781294741.git.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>
platform/x86/intel/pmc/ssram: Switch to static array with per-index probe state 2026-06-14T23:13:12+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:53+00:00 e3c9200a9c0e05532c495956883ba11fe23a3df0 Replace devm-allocated pmc_ssram_telems pointer with a fixed-size static array and introduce per-index probe state tracking. This prepares the driver for later per-device probe handling where tying the PMC tracking storage to one probed PCI device is no longer suitable. The previous single global device_probed flag cannot describe the state of individual PMC indices when multiple devices can be probed independently. Replace it with per-index state (UNPROBED, PROBING, PRESENT, ABSENT) and a staging cache that publishes discovered values only after probe completes. This avoids races between probe/unbind and concurrent readers. Use marked state accesses with release/acquire ordering to prevent compiler and CPU reordering issues across concurrent probe/unbind cycles. This patch was substantially rewritten in later revisions. Originally developed from earlier work by Xi Pardee. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Assisted-by: Claude:claude-sonnet-4-5 Link: https://patch.msgid.link/a2cccf532bec04fcc370819890d936212bc1b14c.1781294741.git.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> 
Replace devm-allocated pmc_ssram_telems pointer with a fixed-size static
array and introduce per-index probe state tracking.

This prepares the driver for later per-device probe handling where tying
the PMC tracking storage to one probed PCI device is no longer suitable.

The previous single global device_probed flag cannot describe the state of
individual PMC indices when multiple devices can be probed independently.
Replace it with per-index state (UNPROBED, PROBING, PRESENT, ABSENT) and a
staging cache that publishes discovered values only after probe completes.
This avoids races between probe/unbind and concurrent readers.

Use marked state accesses with release/acquire ordering to prevent compiler
and CPU reordering issues across concurrent probe/unbind cycles.

This patch was substantially rewritten in later revisions. Originally
developed from earlier work by Xi Pardee.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Assisted-by: Claude:claude-sonnet-4-5
Link: https://patch.msgid.link/a2cccf532bec04fcc370819890d936212bc1b14c.1781294741.git.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>
platform/x86/intel/pmc/ssram: Refactor DEVID/PWRMBASE extraction into helper 2026-06-14T23:13:10+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:52+00:00 f79e57e2677c7641e94d5a38d4b2c2165f5c385c Move DEVID/PWRMBASE extraction into pmc_ssram_get_devid_pwrmbase(). This is a preparatory refactor to place functionality in a common helper for reuse by a subsequent patch. Additionally add missing bits.h include and define SSRAM_BASE_ADDR_MASK for the address extraction mask. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://patch.msgid.link/75ca738c88729f37f286f342c1fe8ff86f7eafe7.1781294741.git.david.e.box@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
Move DEVID/PWRMBASE extraction into pmc_ssram_get_devid_pwrmbase().

This is a preparatory refactor to place functionality in a common helper
for reuse by a subsequent patch. Additionally add missing bits.h
include and define SSRAM_BASE_ADDR_MASK for the address extraction mask.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/75ca738c88729f37f286f342c1fe8ff86f7eafe7.1781294741.git.david.e.box@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
platform/x86/intel/pmc/ssram: Add PCI platform data 2026-06-14T23:13:08+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:51+00:00 d936dd2c605a17ab41826c1e7f738424d3d0bbfd Add per-device platform data for SSRAM telemetry PCI IDs and route probe through a method selector driven by id->driver_data. This is a preparatory refactor for follow-on discovery methods while preserving current behavior: all supported IDs continue to use the PCI initialization path. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://patch.msgid.link/1c6180097b20dbe1337828bf6d3667854d63583a.1781294741.git.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> 
Add per-device platform data for SSRAM telemetry PCI IDs and route probe
through a method selector driven by id->driver_data.

This is a preparatory refactor for follow-on discovery methods while
preserving current behavior: all supported IDs continue to use the PCI
initialization path.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://patch.msgid.link/1c6180097b20dbe1337828bf6d3667854d63583a.1781294741.git.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>
platform/x86/intel/pmc/ssram: Rename probe and PCI ID table for consistency 2026-06-14T23:13:07+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:50+00:00 90fd47d0d8109ef1301a60a44a7f85581a1e6efe Rename intel_pmc_ssram_telemetry_probe() to pmc_ssram_telemetry_probe() and intel_pmc_ssram_telemetry_pci_ids[] to pmc_ssram_telemetry_pci_ids[], updating the MODULE_DEVICE_TABLE() and pci_driver wiring accordingly. This aligns the symbol names with the driver filename and module name, reduces redundant intel_ prefixes, and improves readability. No functional behavior changes are intended. Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://patch.msgid.link/6d3935858214fdd0f530f9a7c08a387fa4e5e8cd.1781294741.git.david.e.box@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
Rename intel_pmc_ssram_telemetry_probe() to pmc_ssram_telemetry_probe() and
intel_pmc_ssram_telemetry_pci_ids[] to pmc_ssram_telemetry_pci_ids[],
updating the MODULE_DEVICE_TABLE() and pci_driver wiring accordingly.

This aligns the symbol names with the driver filename and module name,
reduces redundant intel_ prefixes, and improves readability. No functional
behavior changes are intended.

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://patch.msgid.link/6d3935858214fdd0f530f9a7c08a387fa4e5e8cd.1781294741.git.david.e.box@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
platform/x86/intel/pmc: Add ACPI PWRM telemetry driver for Nova Lake S 2026-06-14T23:13:05+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:49+00:00 adc5d98d9ff8b5d37e89e11a2ac5512595541329 Add an ACPI-based PMC PWRM telemetry driver for Nova Lake S. The driver locates PMT discovery data in _DSD under the Intel VSEC UUID, parses it, and registers telemetry regions with the PMT/VSEC framework so PMC telemetry is exposed via existing PMT interfaces. Export pmc_parse_telem_dsd() and pmc_find_telem_guid() to support ACPI discovery in other PMC drivers (e.g., ssram_telemetry) without duplicating ACPI parsing logic. Also export acpi_disc_t typedef from core.h for callers to properly declare discovery table arrays. Selected by INTEL_PMC_CORE. Existing PCI functionality is preserved. Assisted-by: GitHub-Copilot:claude-opus-4.7 Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://patch.msgid.link/09b8211d8a5a79fa019ee2397137a6a43cf19430.1781294741.git.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> 
Add an ACPI-based PMC PWRM telemetry driver for Nova Lake S. The driver
locates PMT discovery data in _DSD under the Intel VSEC UUID, parses it,
and registers telemetry regions with the PMT/VSEC framework so PMC
telemetry is exposed via existing PMT interfaces.

Export pmc_parse_telem_dsd() and pmc_find_telem_guid() to support ACPI
discovery in other PMC drivers (e.g., ssram_telemetry) without duplicating
ACPI parsing logic. Also export acpi_disc_t typedef from core.h for callers
to properly declare discovery table arrays.

Selected by INTEL_PMC_CORE. Existing PCI functionality is preserved.

Assisted-by: GitHub-Copilot:claude-opus-4.7
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://patch.msgid.link/09b8211d8a5a79fa019ee2397137a6a43cf19430.1781294741.git.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>
platform/x86/intel/pmc: Add PMC SSRAM Kconfig description 2026-06-14T23:13:03+00:00 David E. Box david.e.box@linux.intel.com 2026-06-12T21:01:48+00:00 8ba4cf60c5ce4a3073126a6cbb09475010f8fa52 Add a proper description for the intel_pmc_ssram driver. Signed-off-by: David E. Box <david.e.box@linux.intel.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://patch.msgid.link/bd7ba2f98450751af1de054dac0469acc1138513.1781294741.git.david.e.box@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
Add a proper description for the intel_pmc_ssram driver.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/bd7ba2f98450751af1de054dac0469acc1138513.1781294741.git.david.e.box@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>