diff options
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 64 |
1 files changed, 32 insertions, 32 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index dc8afcefd3cc..d8b42b0a2539 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1714,6 +1714,38 @@ static int setup_gcr3_table(struct protection_domain *domain, int pasids) return 0; } +static u64 *__get_gcr3_pte(u64 *root, int level, u32 pasid, bool alloc) +{ + int index; + u64 *pte; + + while (true) { + + index = (pasid >> (9 * level)) & 0x1ff; + pte = &root[index]; + + if (level == 0) + break; + + if (!(*pte & GCR3_VALID)) { + if (!alloc) + return NULL; + + root = (void *)get_zeroed_page(GFP_ATOMIC); + if (root == NULL) + return NULL; + + *pte = iommu_virt_to_phys(root) | GCR3_VALID; + } + + root = iommu_phys_to_virt(*pte & PAGE_MASK); + + level -= 1; + } + + return pte; +} + static void set_dte_entry(struct amd_iommu *iommu, struct iommu_dev_data *dev_data) { @@ -2737,38 +2769,6 @@ int amd_iommu_flush_tlb(struct iommu_domain *dom, u32 pasid) return ret; } -static u64 *__get_gcr3_pte(u64 *root, int level, u32 pasid, bool alloc) -{ - int index; - u64 *pte; - - while (true) { - - index = (pasid >> (9 * level)) & 0x1ff; - pte = &root[index]; - - if (level == 0) - break; - - if (!(*pte & GCR3_VALID)) { - if (!alloc) - return NULL; - - root = (void *)get_zeroed_page(GFP_ATOMIC); - if (root == NULL) - return NULL; - - *pte = iommu_virt_to_phys(root) | GCR3_VALID; - } - - root = iommu_phys_to_virt(*pte & PAGE_MASK); - - level -= 1; - } - - return pte; -} - static int __set_gcr3(struct protection_domain *domain, u32 pasid, unsigned long cr3) { |