Log SBDF headers only when there are actual IRTEs to log. This is particularly important for the total volume of output when the ACPI tables describe far more than just the existing devices. On my Rome system so far there was one line for every function of every device on all 256 buses of segment 0, with extremely few exceptions (like the IOMMUs themselves).
Also only log one of the "per-device" or "shared" overall headers. Signed-off-by: Jan Beulich <[email protected]> --- v4: New. --- a/xen/drivers/passthrough/amd/iommu_intr.c +++ b/xen/drivers/passthrough/amd/iommu_intr.c @@ -883,7 +883,8 @@ int __init amd_setup_hpet_msi(struct msi } static void dump_intremap_table(const struct amd_iommu *iommu, - union irte_cptr tbl) + union irte_cptr tbl, + const struct ivrs_mappings *ivrs_mapping) { unsigned int count; @@ -892,19 +893,25 @@ static void dump_intremap_table(const st for ( count = 0; count < INTREMAP_ENTRIES; count++ ) { - if ( iommu->ctrl.ga_en ) - { - if ( !tbl.ptr128[count].raw[0] && !tbl.ptr128[count].raw[1] ) + if ( iommu->ctrl.ga_en + ? !tbl.ptr128[count].raw[0] && !tbl.ptr128[count].raw[1] + : !tbl.ptr32[count].raw ) continue; + + if ( ivrs_mapping ) + { + printk(" %04x:%02x:%02x:%u:\n", iommu->seg, + PCI_BUS(ivrs_mapping->dte_requestor_id), + PCI_SLOT(ivrs_mapping->dte_requestor_id), + PCI_FUNC(ivrs_mapping->dte_requestor_id)); + ivrs_mapping = NULL; + } + + if ( iommu->ctrl.ga_en ) printk(" IRTE[%03x] %016lx_%016lx\n", count, tbl.ptr128[count].raw[1], tbl.ptr128[count].raw[0]); - } else - { - if ( !tbl.ptr32[count].raw ) - continue; printk(" IRTE[%03x] %08x\n", count, tbl.ptr32[count].raw); - } } } @@ -916,13 +923,8 @@ static int dump_intremap_mapping(const s if ( !ivrs_mapping ) return 0; - printk(" %04x:%02x:%02x:%u:\n", iommu->seg, - PCI_BUS(ivrs_mapping->dte_requestor_id), - PCI_SLOT(ivrs_mapping->dte_requestor_id), - PCI_FUNC(ivrs_mapping->dte_requestor_id)); - spin_lock_irqsave(&(ivrs_mapping->intremap_lock), flags); - dump_intremap_table(iommu, ivrs_mapping->intremap_table); + dump_intremap_table(iommu, ivrs_mapping->intremap_table, ivrs_mapping); spin_unlock_irqrestore(&(ivrs_mapping->intremap_lock), flags); process_pending_softirqs(); @@ -932,17 +934,22 @@ static int dump_intremap_mapping(const s static void dump_intremap_tables(unsigned char key) { - unsigned long flags; - - printk("--- Dumping Per-dev IOMMU Interrupt Remapping Table ---\n"); + if ( !shared_intremap_table ) + { + printk("--- Dumping Per-dev IOMMU Interrupt Remapping Table ---\n"); - iterate_ivrs_entries(dump_intremap_mapping); + iterate_ivrs_entries(dump_intremap_mapping); + } + else + { + unsigned long flags; - printk("--- Dumping Shared IOMMU Interrupt Remapping Table ---\n"); + printk("--- Dumping Shared IOMMU Interrupt Remapping Table ---\n"); - spin_lock_irqsave(&shared_intremap_lock, flags); - dump_intremap_table(list_first_entry(&amd_iommu_head, struct amd_iommu, - list), - shared_intremap_table); - spin_unlock_irqrestore(&shared_intremap_lock, flags); + spin_lock_irqsave(&shared_intremap_lock, flags); + dump_intremap_table(list_first_entry(&amd_iommu_head, struct amd_iommu, + list), + shared_intremap_table, NULL); + spin_unlock_irqrestore(&shared_intremap_lock, flags); + } } _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
