Changeset 26999 in vbox for trunk/include/VBox

Timestamp:

Mar 3, 2010 5:00:05 PM (15 years ago)

Author:

vboxsync

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

58307

Message:

Guest Additions: memory ballooning for guests without support for RTR0MemObjAllocPhysNC() (does not work yet)

Location:

trunk/include/VBox

Files:

• VBoxGuest.h (modified) (1 diff)
• VBoxGuestLib.h (modified) (1 diff)

trunk/include/VBox/VBoxGuest.h

@@ -270 +270 @@
 
 
-/** IOCTL to VBoxGuest to check memory ballooning. */
-#define VBOXGUEST_IOCTL_CTL_CHECK_BALLOON_MASK      VBOXGUEST_IOCTL_CODE_(7, 100)
+/** IOCTL to VBoxGuest to check memory ballooning.
+ * The guest kernel module / device driver will ask the host for the current size of
+ * the balloon and adjust the size or return with VERR_NO_PHYS_MEMORY. In the latter
+ * case the user-level application is responsible for allocating memory in userland
+ * and call the kernel module again doing VBOXGUEST_IOCTL_CHANGE_BALLOON */
+#define VBOXGUEST_IOCTL_CHECK_BALLOON               VBOXGUEST_IOCTL_CODE_(7, 100)
+
+
+/** IOCTL to VBoxGuest to supply or revoke one chunk for ballooning. The guest kernel
+ * module / device driver will lock down supplied memory or unlock reclaimed memory
+ * and then forward the physical addresses of the changed balloon chunk to the host. */
+#define VBOXGUEST_IOCTL_CHANGE_BALLOON              VBOXGUEST_IOCTL_CODE_(8, sizeof(VBoxGuestChangeBalloonInfo))
+
+/** Information about a memory chunk used to inflate or deflate the balloon. */
+typedef struct VBoxGuestChangeBalloonInfo
+{
+    /** Address of  */
+    uint64_t u64ChunkAddr;
+    /** true = inflate, false = deflate */
+    bool     fInflate;
+} VBoxGuestChangeBalloonInfo;
+AssertCompileSize(VBoxGuestChangeBalloonInfo, 12);
 
 

trunk/include/VBox/VBoxGuestLib.h

@@ -468 +468 @@
  * @{ */
 VBGLR3DECL(int) VbglR3MemBalloonRefresh(uint32_t *pu32Size);
+VBGLR3DECL(int) VbglR3MemBalloonChange(void *pv, bool fInflate);
 /** @}  */