Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-01 10:42:11 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

platform/x86:intel/pmc: Add support to show ltr_ignore value

Browse Source 
Add a column in ltr_show output to show if the IP has been ignored.
A mutex lock is used to protect the critical section as other processes
might try to write to the LTR ignore register at the same time.

Signed-off-by: Xi Pardee <xi.pardee@intel.com>
Link: https://lore.kernel.org/r/20240624203218.2428475-6-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 2024-06-24 13:32:14 -07:00 committed by Ilpo Järvinen
parent 4455e2b1c8
commit 438aef8270
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/platform/x86/intel/pmc/core.c
View File

@ -623,13 +623,24 @@ static int pmc_core_ltr_show(struct seq_file *s, void *unused)
for (i = 0; i < ARRAY_SIZE(pmcdev->pmcs); ++i) {
struct pmc *pmc;
const struct pmc_bit_map *map;
u32 ltr_ign_reg;
pmc = pmcdev->pmcs[i];
if (!pmc)
continue;
scoped_guard(mutex, &pmcdev->lock)
ltr_ign_reg = pmc_core_reg_read(pmc, pmc->map->ltr_ignore_offset);
map = pmc->map->ltr_show_sts;
for (index = 0; map[index].name; index++) {
bool ltr_ign_data;
if (index > pmc->map->ltr_ignore_max)
ltr_ign_data = false;
else
ltr_ign_data = ltr_ign_reg & BIT(index);
decoded_snoop_ltr = decoded_non_snoop_ltr = 0;
ltr_raw_data = pmc_core_reg_read(pmc,
map[index].bit_mask);
@ -647,10 +658,10 @@ static int pmc_core_ltr_show(struct seq_file *s, void *unused)
decoded_snoop_ltr = val * convert_ltr_scale(scale);
}
seq_printf(s, "%d\tPMC%d:%-32s\tLTR: RAW: 0x%-16x\tNon-Snoop(ns): %-16llu\tSnoop(ns): %-16llu\n",
seq_printf(s, "%d\tPMC%d:%-32s\tLTR: RAW: 0x%-16x\tNon-Snoop(ns): %-16llu\tSnoop(ns): %-16llu\tLTR_IGNORE: %d\n",
ltr_index, i, map[index].name, ltr_raw_data,
decoded_non_snoop_ltr,
decoded_snoop_ltr);
decoded_snoop_ltr, ltr_ign_data);
ltr_index++;
}
}