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platform/x86/intel/pmc: Enable Pkgc blocking residency counter

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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 <xi.pardee@linux.intel.com>
Link: https://patch.msgid.link/20260505043342.2573556-4-xi.pardee@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Xi Pardee 2026-05-04 21:33:34 -07:00 committed by Ilpo Järvinen
parent 38c79dd63b
commit d727eb1c3e
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
2 changed files with 23 additions and 0 deletions
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15
drivers/platform/x86/intel/pmc/core.c
View File

@ -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);
}
}

8
drivers/platform/x86/intel/pmc/core.h
View File

@ -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);