summaryrefslogtreecommitdiff
path: root/include/linux/intel-iommu.h
diff options
context:
space:
mode:
authorLu Baolu <baolu.lu@linux.intel.com>2018-12-10 04:58:57 +0300
committerJoerg Roedel <jroedel@suse.de>2018-12-11 12:45:57 +0300
commit4f2ed183cfebf42b29ed8fe442169de97bc0fe61 (patch)
tree6879596b09b13ad63dfd3c71da01aee71ac12314 /include/linux/intel-iommu.h
parent0bbeb01a4fafbf8422e5c8882d461d6ac4f71e15 (diff)
downloadlinux-4f2ed183cfebf42b29ed8fe442169de97bc0fe61.tar.xz
iommu/vt-d: Move page table helpers into header
So that they could also be used in other source files. Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Kevin Tian <kevin.tian@intel.com> Cc: Liu Yi L <yi.l.liu@intel.com> Cc: Sanjay Kumar <sanjay.k.kumar@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Ashok Raj <ashok.raj@intel.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/intel-iommu.h')
-rw-r--r--include/linux/intel-iommu.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 8c9b6063d275..b4da61385ebf 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -590,6 +590,49 @@ static inline void __iommu_flush_cache(
clflush_cache_range(addr, size);
}
+/*
+ * 0: readable
+ * 1: writable
+ * 2-6: reserved
+ * 7: super page
+ * 8-10: available
+ * 11: snoop behavior
+ * 12-63: Host physcial address
+ */
+struct dma_pte {
+ u64 val;
+};
+
+static inline void dma_clear_pte(struct dma_pte *pte)
+{
+ pte->val = 0;
+}
+
+static inline u64 dma_pte_addr(struct dma_pte *pte)
+{
+#ifdef CONFIG_64BIT
+ return pte->val & VTD_PAGE_MASK;
+#else
+ /* Must have a full atomic 64-bit read */
+ return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK;
+#endif
+}
+
+static inline bool dma_pte_present(struct dma_pte *pte)
+{
+ return (pte->val & 3) != 0;
+}
+
+static inline bool dma_pte_superpage(struct dma_pte *pte)
+{
+ return (pte->val & DMA_PTE_LARGE_PAGE);
+}
+
+static inline int first_pte_in_page(struct dma_pte *pte)
+{
+ return !((unsigned long)pte & ~VTD_PAGE_MASK);
+}
+
extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);