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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2020-09-22 14:08:43 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-09-24 10:59:55 +0200 |
| commit | d2ef0962492c3be3563e53a431c285678849b3c1 (patch) | |
| tree | f401a7424d955dcfa2920de6de812ca75940da8a /drivers/iommu | |
| parent | c7eb900f5f45eeab1ea1bed997a2a12d8b5907bc (diff) | |
| download | linux-d2ef0962492c3be3563e53a431c285678849b3c1.tar.bz2 | |
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index f8177c59d229..077b69ff680b 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -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 = |