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| author | Petr Mladek <pmladek@suse.com> | 2021-11-02 10:39:27 +0100 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2021-11-02 10:39:27 +0100 |
| commit | 40e64a88dadcfa168914065baf7f035de957bbe0 (patch) | |
| tree | 06c8c4a9e6c1b478aa6851794c6a33bec1ce6ec4 /drivers/iommu/intel/pasid.c | |
| parent | 24a1dffbecafeb00d8830985eb7a318e37aabc4e (diff) | |
| parent | 6a7ca80f4033c9cf3003625b2ef8b497f4ec44da (diff) | |
| download | linux-40e64a88dadcfa168914065baf7f035de957bbe0.tar.gz linux-40e64a88dadcfa168914065baf7f035de957bbe0.tar.bz2 linux-40e64a88dadcfa168914065baf7f035de957bbe0.zip | |
Merge branch 'for-5.16-vsprintf-pgp' into for-linus
Diffstat (limited to 'drivers/iommu/intel/pasid.c')
| -rw-r--r-- | drivers/iommu/intel/pasid.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c index 9ec374e17469..07c390aed1fe 100644 --- a/drivers/iommu/intel/pasid.c +++ b/drivers/iommu/intel/pasid.c @@ -517,7 +517,7 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev, if (WARN_ON(!pte)) return; - if (!(pte->val[0] & PASID_PTE_PRESENT)) + if (!pasid_pte_is_present(pte)) return; did = pasid_get_domain_id(pte); @@ -540,6 +540,10 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev, devtlb_invalidation_with_pasid(iommu, dev, pasid); } +/* + * This function flushes cache for a newly setup pasid table entry. + * Caller of it should not modify the in-use pasid table entries. + */ static void pasid_flush_caches(struct intel_iommu *iommu, struct pasid_entry *pte, u32 pasid, u16 did) @@ -591,6 +595,10 @@ int intel_pasid_setup_first_level(struct intel_iommu *iommu, if (WARN_ON(!pte)) return -EINVAL; + /* Caller must ensure PASID entry is not in use. */ + if (pasid_pte_is_present(pte)) + return -EBUSY; + pasid_clear_entry(pte); /* Setup the first level page table pointer: */ @@ -690,6 +698,10 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu, return -ENODEV; } + /* Caller must ensure PASID entry is not in use. */ + if (pasid_pte_is_present(pte)) + return -EBUSY; + pasid_clear_entry(pte); pasid_set_domain_id(pte, did); pasid_set_slptr(pte, pgd_val); @@ -729,6 +741,10 @@ int intel_pasid_setup_pass_through(struct intel_iommu *iommu, return -ENODEV; } + /* Caller must ensure PASID entry is not in use. */ + if (pasid_pte_is_present(pte)) + return -EBUSY; + pasid_clear_entry(pte); pasid_set_domain_id(pte, did); pasid_set_address_width(pte, iommu->agaw); |