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| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2020-05-16 08:20:46 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-18 15:37:25 +0200 |
| commit | b0d1f8741b812352fe0e5f3b2381427085f23e19 (patch) | |
| tree | 21bca423e213b53d2c6f835ca2198be1676b861f /drivers/iommu/intel-iommu.c | |
| parent | iommu/vt-d: Use a helper function to skip agaw for SL (diff) | |
| download | linux-b0d1f8741b812352fe0e5f3b2381427085f23e19.tar.xz linux-b0d1f8741b812352fe0e5f3b2381427085f23e19.zip | |
iommu/vt-d: Add nested translation helper function
Nested translation mode is supported in VT-d 3.0 Spec.CH 3.8.
With PASID granular translation type set to 0x11b, translation
result from the first level(FL) also subject to a second level(SL)
page table translation. This mode is used for SVA virtualization,
where FL performs guest virtual to guest physical translation and
SL performs guest physical to host physical translation.
This patch adds a helper function for setting up nested translation
where second level comes from a domain and first level comes from
a guest PGD.
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>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20200516062101.29541-4-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 | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 8027f21073eb..7e85c09eec71 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -296,31 +296,6 @@ static inline void context_clear_entry(struct context_entry *context) static struct dmar_domain *si_domain; static int hw_pass_through = 1; -/* si_domain contains mulitple devices */ -#define DOMAIN_FLAG_STATIC_IDENTITY BIT(0) - -/* - * This is a DMA domain allocated through the iommu domain allocation - * interface. But one or more devices belonging to this domain have - * been chosen to use a private domain. We should avoid to use the - * map/unmap/iova_to_phys APIs on it. - */ -#define DOMAIN_FLAG_LOSE_CHILDREN BIT(1) - -/* - * When VT-d works in the scalable mode, it allows DMA translation to - * happen through either first level or second level page table. This - * bit marks that the DMA translation for the domain goes through the - * first level page table, otherwise, it goes through the second level. - */ -#define DOMAIN_FLAG_USE_FIRST_LEVEL BIT(2) - -/* - * Domain represents a virtual machine which demands iommu nested - * translation mode support. - */ -#define DOMAIN_FLAG_NESTING_MODE BIT(3) - #define for_each_domain_iommu(idx, domain) \ for (idx = 0; idx < g_num_of_iommus; idx++) \ if (domain->iommu_refcnt[idx]) |