Unverified Commit 438aef82 authored by Xi Pardee's avatar Xi Pardee Committed by Ilpo Järvinen
Browse files

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



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: default avatarXi Pardee <xi.pardee@intel.com>
Link: https://lore.kernel.org/r/20240624203218.2428475-6-xi.pardee@linux.intel.com


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent 4455e2b1

drivers/platform/x86/intel/pmc/core.c

+13 −2
Original line number Diff line number Diff line
@@ -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++;

		}

	}