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Commit ee34b32d authored by Suresh Siddha's avatar Suresh Siddha Committed by David Woodhouse
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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: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent e0fc7e0b

drivers/pci/dmar.c

+23 −1
Original line number Diff line number Diff line
@@ -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));

include/linux/intel-iommu.h

+1 −0
Original line number Diff line number Diff line
@@ -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(