Changeset 100357 in vbox for trunk/include

Timestamp:

Jul 4, 2023 7:00:26 AM (18 months ago)

Author:

vboxsync

Message:

Runtime/RTR0MemObj*: Add PhysHighest parameter to RTR0MemObjAllocCont to indicate the maximum allowed physical address for an allocation, bugref:10457 [second attempt]

File:

• trunk/include/iprt/memobj.h (modified) (5 diffs)

trunk/include/iprt/memobj.h

@@ -281 +281 @@
 /**
  * Allocates page aligned virtual kernel memory with contiguous physical backing
- * below 4GB (default tag).
+ * (default tag).
  *
  * The physical memory backing the allocation is fixed.
@@ -288 +288 @@
  * @param   pMemObj         Where to store the ring-0 memory object handle.
  * @param   cb              Number of bytes to allocate. This is rounded up to nearest page.
+ * @param   PhysHighest     The highest permitable address (inclusive).
+ *                          Pass NIL_RTHCPHYS if any address is acceptable.
  * @param   fExecutable     Flag indicating whether it should be permitted to
  *                          executed code in the memory object.  The user must
@@ -293 +295 @@
  *                          allocation to actually make it executable.
  */
-#define RTR0MemObjAllocCont(pMemObj, cb, fExecutable) \
-    RTR0MemObjAllocContTag((pMemObj), (cb), (fExecutable), RTMEM_TAG)
-
-/**
- * Allocates page aligned virtual kernel memory with contiguous physical backing
- * below 4GB (custom tag).
+#define RTR0MemObjAllocCont(pMemObj, cb, PhysHigest, fExecutable) \
+    RTR0MemObjAllocContTag((pMemObj), (cb), (PhysHigest), (fExecutable), RTMEM_TAG)
+
+/**
+ * Allocates page aligned virtual kernel memory with contiguous physical
+ * backing (custom tag).
  *
  * The physical memory backing the allocation is fixed.
@@ -305 +307 @@
  * @param   pMemObj         Where to store the ring-0 memory object handle.
  * @param   cb              Number of bytes to allocate. This is rounded up to nearest page.
+ * @param   PhysHighest     The highest permitable address (inclusive).
+ *                          Pass NIL_RTHCPHYS if any address is acceptable.
  * @param   fExecutable     Flag indicating whether it should be permitted to
  *                          executed code in the memory object.  The user must
@@ -311 +315 @@
  * @param   pszTag          Allocation tag used for statistics and such.
  */
-RTR0DECL(int) RTR0MemObjAllocContTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag);
+RTR0DECL(int) RTR0MemObjAllocContTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, bool fExecutable, const char *pszTag);
 
 /**