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| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2020-05-16 08:20:47 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-18 15:37:25 +0200 |
| commit | 56722a4398a306585ca3ed39ff54fc907af98618 (patch) | |
| tree | ca3d9b5b24d21ce590646e848460d5a2f9c92430 /drivers/iommu/intel-iommu.c | |
| parent | iommu/vt-d: Add nested translation helper function (diff) | |
| download | linux-56722a4398a306585ca3ed39ff54fc907af98618.tar.xz linux-56722a4398a306585ca3ed39ff54fc907af98618.zip | |
iommu/vt-d: Add bind guest PASID support
When supporting guest SVA with emulated IOMMU, the guest PASID
table is shadowed in VMM. Updates to guest vIOMMU PASID table
will result in PASID cache flush which will be passed down to
the host as bind guest PASID calls.
For the SL page tables, it will be harvested from device's
default domain (request w/o PASID), or aux domain in case of
mediated device.
.-------------. .---------------------------.
| vIOMMU | | Guest process CR3, FL only|
| | '---------------------------'
.----------------/
| PASID Entry |--- PASID cache flush -
'-------------' |
| | V
| | CR3 in GPA
'-------------'
Guest
------| Shadow |--------------------------|--------
v v v
Host
.-------------. .----------------------.
| pIOMMU | | Bind FL for GVA-GPA |
| | '----------------------'
.----------------/ |
| PASID Entry | V (Nested xlate)
'----------------\.------------------------------.
| | |SL for GPA-HPA, default domain|
| | '------------------------------'
'-------------'
Where:
- FL = First level/stage one page tables
- SL = Second level/stage two page tables
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200516062101.29541-5-baolu.lu@linux.intel.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 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 7e85c09eec71..f42c548f8421 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5780,6 +5780,10 @@ const struct iommu_ops intel_iommu_ops = { .is_attach_deferred = intel_iommu_is_attach_deferred, .def_domain_type = device_def_domain_type, .pgsize_bitmap = INTEL_IOMMU_PGSIZES, +#ifdef CONFIG_INTEL_IOMMU_SVM + .sva_bind_gpasid = intel_svm_bind_gpasid, + .sva_unbind_gpasid = intel_svm_unbind_gpasid, +#endif }; static void quirk_iommu_igfx(struct pci_dev *dev) |