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| author | Lu Baolu | 2018-07-14 09:46:54 +0200 |
|---|---|---|
| committer | Joerg Roedel | 2018-07-20 14:44:23 +0200 |
| commit | 562831747f6299abd481b5b00bd4fa19d5c8a259 (patch) | |
| tree | 48c52168f4d8d570bb79a2b30749d1c4cc142ca7 /drivers/iommu/intel-iommu.c | |
| parent | iommu/vt-d: Remove unnecessary WARN_ON() (diff) | |
| download | kernel-qcow2-linux-562831747f6299abd481b5b00bd4fa19d5c8a259.tar.gz kernel-qcow2-linux-562831747f6299abd481b5b00bd4fa19d5c8a259.tar.xz kernel-qcow2-linux-562831747f6299abd481b5b00bd4fa19d5c8a259.zip | |
iommu/vt-d: Global PASID name space
This adds the system wide PASID name space for the PASID
allocation. Currently we are using per IOMMU PASID name
spaces which are not suitable for some use cases. For an
example, one application (associated with a PASID) might
talk to two physical devices simultaneously while the two
devices could reside behind two different IOMMU units.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Liu Yi L <yi.l.liu@intel.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 497ef94c5a8c..fa15ed036ddc 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -53,6 +53,7 @@ #include <asm/iommu.h> #include "irq_remapping.h" +#include "intel-pasid.h" #define ROOT_SIZE VTD_PAGE_SIZE #define CONTEXT_SIZE VTD_PAGE_SIZE @@ -3293,6 +3294,18 @@ static int __init init_dmars(void) } for_each_active_iommu(iommu, drhd) { + /* + * Find the max pasid size of all IOMMU's in the system. + * We need to ensure the system pasid table is no bigger + * than the smallest supported. + */ + if (pasid_enabled(iommu)) { + u32 temp = 2 << ecap_pss(iommu->ecap); + + intel_pasid_max_id = min_t(u32, temp, + intel_pasid_max_id); + } + g_iommus[iommu->seq_id] = iommu; intel_iommu_init_qi(iommu); |