From 438aef8270579d4f8dee976709f015deb084e665 Mon Sep 17 00:00:00 2001 From: Xi Pardee Date: Mon, 24 Jun 2024 13:32:14 -0700 Subject: [PATCH] platform/x86:intel/pmc: Add support to show ltr_ignore value MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Link: https://lore.kernel.org/r/20240624203218.2428475-6-xi.pardee@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- drivers/platform/x86/intel/pmc/core.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c index fdf2859daeaaa..c15163409e95b 100644 --- a/drivers/platform/x86/intel/pmc/core.c +++ b/drivers/platform/x86/intel/pmc/core.c @@ -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++; } } -- 2.47.2