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authorSuresh Siddha <suresh.b.siddha@intel.com>2009-10-02 11:01:21 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-10-05 07:55:22 +0100
commitee34b32d8c2950f66038c8975747ef9aec855289 (patch)
tree572eef281a2b41b3e5ca5d6889752f5e7736526b /drivers/pci
parente0fc7e0b4b5e69616f10a894ab9afff3c64be74e (diff)
downloadop-kernel-dev-ee34b32d8c2950f66038c8975747ef9aec855289.zip
op-kernel-dev-ee34b32d8c2950f66038c8975747ef9aec855289.tar.gz
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>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/dmar.c24
1 files changed, 23 insertions, 1 deletions
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 @@ found:
}
#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 @@ parse_dmar_table(void)
#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 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
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));
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