Changeset 89475 in vbox for trunk

Timestamp:

Jun 3, 2021 5:15:53 AM (4 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

144831

Message:

Intel IOMMU: bugref:9967 x86.h: Macros for getting page base and offset masks (for upcoming changes and will replace similar macros in AMD IOMMU code as well).

File:

• trunk/include/iprt/x86.h (modified) (1 diff)

trunk/include/iprt/x86.h

@@ -1970 +1970 @@
 #define X86_IS_CANONICAL(a_u64Addr)         ((uint64_t)(a_u64Addr) + UINT64_C(0x800000000000) < UINT64_C(0x1000000000000))
 
+/**
+ * Gets the page base mask given the page shift.
+ */
+#define X86_GET_PAGE_BASE_MASK(a_cShift)    (UINT64_C(0xffffffffffffffff) << (a_cShift))
+
+/**
+ * Gets the page offset mask given the page shift.
+ */
+#define X86_GET_PAGE_OFFSET_MASK(a_cShift)  (~X86_GET_PAGE_BASE_MASK(a_cShift))
+
 
 /** @name Page Table Entry