diff options
Diffstat (limited to 'drivers/iommu/intel-iommu-debugfs.c')
| -rw-r--r-- | drivers/iommu/intel-iommu-debugfs.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c index 3eb1fe240fb0..cf1ebb98e418 100644 --- a/drivers/iommu/intel-iommu-debugfs.c +++ b/drivers/iommu/intel-iommu-debugfs.c @@ -372,6 +372,66 @@ static int domain_translation_struct_show(struct seq_file *m, void *unused) } DEFINE_SHOW_ATTRIBUTE(domain_translation_struct); +static void invalidation_queue_entry_show(struct seq_file *m, + struct intel_iommu *iommu) +{ + int index, shift = qi_shift(iommu); + struct qi_desc *desc; + int offset; + + if (ecap_smts(iommu->ecap)) + seq_puts(m, "Index\t\tqw0\t\t\tqw1\t\t\tqw2\t\t\tqw3\t\t\tstatus\n"); + else + seq_puts(m, "Index\t\tqw0\t\t\tqw1\t\t\tstatus\n"); + + for (index = 0; index < QI_LENGTH; index++) { + offset = index << shift; + desc = iommu->qi->desc + offset; + if (ecap_smts(iommu->ecap)) + seq_printf(m, "%5d\t%016llx\t%016llx\t%016llx\t%016llx\t%016x\n", + index, desc->qw0, desc->qw1, + desc->qw2, desc->qw3, + iommu->qi->desc_status[index]); + else + seq_printf(m, "%5d\t%016llx\t%016llx\t%016x\n", + index, desc->qw0, desc->qw1, + iommu->qi->desc_status[index]); + } +} + +static int invalidation_queue_show(struct seq_file *m, void *unused) +{ + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + unsigned long flags; + struct q_inval *qi; + int shift; + + rcu_read_lock(); + for_each_active_iommu(iommu, drhd) { + qi = iommu->qi; + shift = qi_shift(iommu); + + if (!qi || !ecap_qis(iommu->ecap)) + continue; + + seq_printf(m, "Invalidation queue on IOMMU: %s\n", iommu->name); + + raw_spin_lock_irqsave(&qi->q_lock, flags); + seq_printf(m, " Base: 0x%llx\tHead: %lld\tTail: %lld\n", + (u64)virt_to_phys(qi->desc), + dmar_readq(iommu->reg + DMAR_IQH_REG) >> shift, + dmar_readq(iommu->reg + DMAR_IQT_REG) >> shift); + invalidation_queue_entry_show(m, iommu); + raw_spin_unlock_irqrestore(&qi->q_lock, flags); + seq_putc(m, '\n'); + } + rcu_read_unlock(); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(invalidation_queue); + #ifdef CONFIG_IRQ_REMAP static void ir_tbl_remap_entry_show(struct seq_file *m, struct intel_iommu *iommu) @@ -490,6 +550,8 @@ void __init intel_iommu_debugfs_init(void) debugfs_create_file("domain_translation_struct", 0444, intel_iommu_debug, NULL, &domain_translation_struct_fops); + debugfs_create_file("invalidation_queue", 0444, intel_iommu_debug, + NULL, &invalidation_queue_fops); #ifdef CONFIG_IRQ_REMAP debugfs_create_file("ir_translation_struct", 0444, intel_iommu_debug, NULL, &ir_translation_struct_fops); |