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| author |   Jacob Pan <jacob.jun.pan@linux.intel.com> | 2020-05-16 14:20:47 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2020-05-18 15:37:25 +0200 |
| commit | 56722a4398a306585ca3ed39ff54fc907af98618 (patch) | |
| tree | ca3d9b5b24d21ce590646e848460d5a2f9c92430 /include/linux/intel-svm.h | |
| parent | iommu/vt-d: Add nested translation helper function (diff) | |
| download | linux-dev-56722a4398a306585ca3ed39ff54fc907af98618.tar.xz linux-dev-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 'include/linux/intel-svm.h')
| -rw-r--r-- | include/linux/intel-svm.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h index d7c403d0dd27..1b47ca46373e 100644 --- a/include/linux/intel-svm.h +++ b/include/linux/intel-svm.h @@ -44,6 +44,18 @@ struct svm_dev_ops { * do such IOTLB flushes automatically. */ #define SVM_FLAG_SUPERVISOR_MODE (1<<1) +/* + * The SVM_FLAG_GUEST_MODE flag is used when a PASID bind is for guest + * processes. Compared to the host bind, the primary differences are: + * 1. mm life cycle management + * 2. fault reporting + */ +#define SVM_FLAG_GUEST_MODE (1<<2) +/* + * The SVM_FLAG_GUEST_PASID flag is used when a guest has its own PASID space, + * which requires guest and host PASID translation at both directions. + */ +#define SVM_FLAG_GUEST_PASID (1<<3) #ifdef CONFIG_INTEL_IOMMU_SVM |