dmar: support for parsing Remapping Hardware Static Affinity structure
Add support for parsing Remapping Hardware Static Affinity (RHSA) structure.
This enables identifying the association between remapping hardware units and
the corresponding proximity domain. This enables to allocate transalation
structures closer to the remapping hardware unit.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 22b02c6..5779565 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -348,6 +348,26 @@
}
#endif
+static int __init
+dmar_parse_one_rhsa(struct acpi_dmar_header *header)
+{
+ struct acpi_dmar_rhsa *rhsa;
+ struct dmar_drhd_unit *drhd;
+
+ rhsa = (struct acpi_dmar_rhsa *)header;
+ for_each_drhd_unit(drhd)
+ if (drhd->reg_base_addr == rhsa->base_address) {
+ int node = acpi_map_pxm_to_node(rhsa->proximity_domain);
+
+ if (!node_online(node))
+ node = -1;
+ drhd->iommu->node = node;
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
static void __init
dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
{
@@ -467,7 +487,7 @@
#endif
break;
case ACPI_DMAR_HARDWARE_AFFINITY:
- /* We don't do anything with RHSA (yet?) */
+ ret = dmar_parse_one_rhsa(entry_header);
break;
default:
printk(KERN_WARNING PREFIX
@@ -677,6 +697,8 @@
iommu->agaw = agaw;
iommu->msagaw = msagaw;
+ iommu->node = -1;
+
/* the registers might be more than one page */
map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap),
cap_max_fault_reg_offset(iommu->cap));