From d727eb1c3ede7c21f885ded1f1ad65b47434a9b9 Mon Sep 17 00:00:00 2001 From: Xi Pardee Date: Mon, 4 May 2026 21:33:34 -0700 Subject: [PATCH] platform/x86/intel/pmc: Enable Pkgc blocking residency counter MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Enable the Package C-state blocking counter in the PMT telemetry region. This counter reports the number of 10 µs intervals during which a Package C-state 10.2/3 entry was blocked for the specified reasons. Signed-off-by: Xi Pardee Link: https://patch.msgid.link/20260505043342.2573556-4-xi.pardee@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- drivers/platform/x86/intel/pmc/core.c | 15 +++++++++++++++ drivers/platform/x86/intel/pmc/core.h | 8 ++++++++ 2 files changed, 23 insertions(+) diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c index 7681c444f4bd..94ae098a155a 100644 --- a/drivers/platform/x86/intel/pmc/core.c +++ b/drivers/platform/x86/intel/pmc/core.c @@ -1099,6 +1099,16 @@ static int pmc_core_pkgc_ltr_blocker_show(struct seq_file *s, void *unused) } DEFINE_SHOW_ATTRIBUTE(pmc_core_pkgc_ltr_blocker); +static int pmc_core_pkgc_blocker_residency_show(struct seq_file *s, void *unused) +{ + struct pmc_dev *pmcdev = s->private; + + return pmc_core_pkgc_counters_show(s, pmcdev->pc_ep, + pmcdev->pkgc_blocker_offset, + pmcdev->pkgc_blocker_counters); +} +DEFINE_SHOW_ATTRIBUTE(pmc_core_pkgc_blocker_residency); + static int pmc_core_lpm_latch_mode_show(struct seq_file *s, void *unused) { struct pmc_dev *pmcdev = s->private; @@ -1386,6 +1396,8 @@ void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_de pmcdev->pc_ep = ep; pmcdev->pkgc_ltr_blocker_counters = pmc_dev_info->pkgc_ltr_blocker_counters; pmcdev->pkgc_ltr_blocker_offset = pmc_dev_info->pkgc_ltr_blocker_offset; + pmcdev->pkgc_blocker_counters = pmc_dev_info->pkgc_blocker_counters; + pmcdev->pkgc_blocker_offset = pmc_dev_info->pkgc_blocker_offset; } } @@ -1515,6 +1527,9 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev, struct pmc_dev_info debugfs_create_file("pkgc_ltr_blocker_show", 0444, pmcdev->dbgfs_dir, pmcdev, &pmc_core_pkgc_ltr_blocker_fops); + debugfs_create_file("pkgc_blocker_residency_show", 0444, + pmcdev->dbgfs_dir, pmcdev, + &pmc_core_pkgc_blocker_residency_fops); } } diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h index a20aab73c140..829b1dee3f63 100644 --- a/drivers/platform/x86/intel/pmc/core.h +++ b/drivers/platform/x86/intel/pmc/core.h @@ -455,6 +455,8 @@ struct pmc { * * @pkgc_ltr_blocker_counters: Array of PKGC LTR blocker counters * @pkgc_ltr_blocker_offset: Offset to PKGC LTR blockers in telemetry region + * @pkgc_blocker_counters: Array of PKGC blocker counters + * @pkgc_blocker_offset: Offset to PKGC blocker in telemetry region * * pmc_dev contains info about power management controller device. */ @@ -480,6 +482,8 @@ struct pmc_dev { const char **pkgc_ltr_blocker_counters; u32 pkgc_ltr_blocker_offset; + const char **pkgc_blocker_counters; + u32 pkgc_blocker_offset; }; enum pmc_index { @@ -495,6 +499,7 @@ enum pmc_index { * @dmu_guids: List of Die Management Unit GUID * @pc_guid: GUID for telemetry region to read PKGC blocker info * @pkgc_ltr_blocker_offset: Offset to PKGC LTR blockers in telemetry region + * @pkgc_blocker_offset:Offset to PKGC blocker in telemetry region * @regmap_list: Pointer to a list of pmc_info structure that could be * available for the platform. When set, this field implies * SSRAM support. @@ -502,6 +507,7 @@ enum pmc_index { * specific attributes of the primary PMC * @sub_req_show: File operations to show substate requirements * @pkgc_ltr_blocker_counters: Array of PKGC LTR blocker counters + * @pkgc_blocker_counters: Array of PKGC blocker counters * @suspend: Function to perform platform specific suspend * @resume: Function to perform platform specific resume * @init: Function to perform platform specific init action @@ -512,10 +518,12 @@ struct pmc_dev_info { u32 *dmu_guids; u32 pc_guid; u32 pkgc_ltr_blocker_offset; + u32 pkgc_blocker_offset; struct pmc_info *regmap_list; const struct pmc_reg_map *map; const struct file_operations *sub_req_show; const char **pkgc_ltr_blocker_counters; + const char **pkgc_blocker_counters; void (*suspend)(struct pmc_dev *pmcdev); int (*resume)(struct pmc_dev *pmcdev); int (*init)(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info);