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iommu/vt-d: Use device numa domain if RHSA is missing 

If there are multiple NUMA domains but the RHSA is missing in ACPI/DMAR
table, we could default to the device NUMA domain as fall back.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Link: https://lore.kernel.org/r/20200904010303.2961-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20200922060843.31546-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2020-09-22 14:08:43 +08:00 committed by Joerg Roedel
parent c7eb900f5f
commit d2ef096249
1 changed files with 35 additions and 2 deletions
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37
drivers/iommu/intel/iommu.c
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@ -700,12 +700,47 @@ static int domain_update_iommu_superpage(struct dmar_domain *domain,
return fls(mask);
}
static int domain_update_device_node(struct dmar_domain *domain)
{
struct device_domain_info *info;
int nid = NUMA_NO_NODE;
assert_spin_locked(&device_domain_lock);
if (list_empty(&domain->devices))
return NUMA_NO_NODE;
list_for_each_entry(info, &domain->devices, link) {
if (!info->dev)
continue;
/*
* There could possibly be multiple device numa nodes as devices
* within the same domain may sit behind different IOMMUs. There
* isn't perfect answer in such situation, so we select first
* come first served policy.
*/
nid = dev_to_node(info->dev);
if (nid != NUMA_NO_NODE)
break;
}
return nid;
}
/* Some capabilities may be different across iommus */
static void domain_update_iommu_cap(struct dmar_domain *domain)
{
domain_update_iommu_coherency(domain);
domain->iommu_snooping = domain_update_iommu_snooping(NULL);
domain->iommu_superpage = domain_update_iommu_superpage(domain, NULL);
/*
* If RHSA is missing, we should default to the device numa domain
* as fall back.
*/
if (domain->nid == NUMA_NO_NODE)
domain->nid = domain_update_device_node(domain);
}
struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
@ -5085,8 +5120,6 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
if (type == IOMMU_DOMAIN_DMA)
intel_init_iova_domain(dmar_domain);
domain_update_iommu_cap(dmar_domain);
domain = &dmar_domain->domain;
domain->geometry.aperture_start = 0;
domain->geometry.aperture_end =