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| author | Allen Kay <allen.m.kay@intel.com> | 2011-10-14 12:32:17 -0700 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2011-10-19 12:06:20 +0100 |
| commit | 8140a95d228efbcd64d84150e794761a32463947 (patch) | |
| tree | 5eb55b8a23f8f015ddfcb6b6e0f8e7db9a9456da /drivers/iommu/intel-iommu.c | |
| parent | 292827cb164ad00cc7689a21283b1261c0b6daed (diff) | |
| download | blackbird-obmc-linux-8140a95d228efbcd64d84150e794761a32463947.tar.gz blackbird-obmc-linux-8140a95d228efbcd64d84150e794761a32463947.zip | |
intel-iommu: set iommu_superpage on VM domains to lowest common denominator
set dmar->iommu_superpage field to the smallest common denominator
of super page sizes supported by all active VT-d engines. Initialize
this field in intel_iommu_domain_init() API so intel_iommu_map() API
will be able to use iommu_superpage field to determine the appropriate
super page size to use.
Signed-off-by: Allen Kay <allen.m.kay@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 237ef52c8c76..e5883602cb35 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -580,17 +580,18 @@ static void domain_update_iommu_snooping(struct dmar_domain *domain) static void domain_update_iommu_superpage(struct dmar_domain *domain) { - int i, mask = 0xf; + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu = NULL; + int mask = 0xf; if (!intel_iommu_superpage) { domain->iommu_superpage = 0; return; } - domain->iommu_superpage = 4; /* 1TiB */ - - for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { - mask |= cap_super_page_val(g_iommus[i]->cap); + /* set iommu_superpage to the smallest common denominator */ + for_each_active_iommu(iommu, drhd) { + mask &= cap_super_page_val(iommu->cap); if (!mask) { break; } @@ -3748,6 +3749,7 @@ static int intel_iommu_domain_init(struct iommu_domain *domain) vm_domain_exit(dmar_domain); return -ENOMEM; } + domain_update_iommu_cap(dmar_domain); domain->priv = dmar_domain; return 0; |
