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dmar: support for parsing Remapping Hardware Static Affinity structure

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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>
This commit is contained in:
Suresh Siddha 2009-10-02 11:01:21 -07:00 committed by David Woodhouse
parent e0fc7e0b4b
commit ee34b32d8c
2 changed files with 24 additions and 1 deletions
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24
drivers/pci/dmar.c
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@ -348,6 +348,26 @@ int dmar_find_matched_atsr_unit(struct pci_dev *dev)
}
#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));

1
include/linux/intel-iommu.h
View File

@ -332,6 +332,7 @@ struct intel_iommu {
#ifdef CONFIG_INTR_REMAP
struct ir_table *ir_table; /* Interrupt remapping info */
#endif
int node;
};
static inline void __iommu_flush_cache(