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platform/x86/intel/pmc: Show live substate requirements

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While debugging runtime s0ix, we do need to check which required IPs
are not power gated. This patch adds code to show live substate status
vs requirements in sys/kernel/debug/pmc_core/substate_requirements to
help runtime s0ix debug.

Signed-off-by: Kane Chen <kane.chen@intel.com>
Link: https://lore.kernel.org/r/20240719122807.3853292-1-kane.chen@intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Kane Chen 2024-07-19 20:28:07 +08:00 committed by Hans de Goede
parent 4c29e80ab8
commit a6fe07ce52
1 changed files with 11 additions and 1 deletions
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12
drivers/platform/x86/intel/pmc/core.c
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@ -794,13 +794,15 @@ static void pmc_core_substate_req_header_show(struct seq_file *s, int pmc_index)
pmc_for_each_mode(i, mode, pmcdev)
seq_printf(s, " %9s |", pmc_lpm_modes[mode]);
seq_printf(s, " %9s |\n", "Status");
seq_printf(s, " %9s |", "Status");
seq_printf(s, " %11s |\n", "Live Status");
}
static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused)
{
struct pmc_dev *pmcdev = s->private;
u32 sts_offset;
u32 sts_offset_live;
u32 *lpm_req_regs;
unsigned int mp, pmc_index;
int num_maps;
@ -815,6 +817,7 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused)
maps = pmc->map->lpm_sts;
num_maps = pmc->map->lpm_num_maps;
sts_offset = pmc->map->lpm_status_offset;
sts_offset_live = pmc->map->lpm_live_status_offset;
lpm_req_regs = pmc->lpm_req_regs;
/*
@ -832,6 +835,7 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused)
for (mp = 0; mp < num_maps; mp++) {
u32 req_mask = 0;
u32 lpm_status;
u32 lpm_status_live;
const struct pmc_bit_map *map;
int mode, idx, i, len = 32;
@ -846,6 +850,9 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused)
/* Get the last latched status for this map */
lpm_status = pmc_core_reg_read(pmc, sts_offset + (mp * 4));
/* Get the runtime status for this map */
lpm_status_live = pmc_core_reg_read(pmc, sts_offset_live + (mp * 4));
/* Loop over elements in this map */
map = maps[mp];
for (i = 0; map[i].name && i < len; i++) {
@ -872,6 +879,9 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused)
/* In Status column, show the last captured state of this agent */
seq_printf(s, " %9s |", lpm_status & bit_mask ? "Yes" : " ");
/* In Live status column, show the live state of this agent */
seq_printf(s, " %11s |", lpm_status_live & bit_mask ? "Yes" : " ");
seq_puts(s, "\n");
}
}