Changeset 18617 in vbox for trunk/include/VBox

Timestamp:

Apr 1, 2009 10:11:29 PM (16 years ago)

Author:

vboxsync

Message:

PGM,EM: Handle out of memory situations more gracefully - part 1. New debugger commands: .pgmerror and .pgmerroroff.

Location:

trunk/include/VBox

Files:

• param.h (modified) (3 diffs)
• vm.h (modified) (3 diffs)

trunk/include/VBox/param.h

@@ -48 +48 @@
  * @{
  */
-
 /** Initial address of Hypervisor Memory Area.
  * MUST BE PAGE TABLE ALIGNED! */
@@ -79 +78 @@
 /** The default size of the below 4GB RAM hole. */
 #define MM_RAM_HOLE_SIZE_DEFAULT    (512U * _1M)
+/** @} */
 
+
+/** @defgroup   grp_vbox_param_pgm  Page Manager Parameters
+ * @ingroup grp_vbox_param
+ * @{
+ */
+/** The number of handy pages.
+ * This should be a power of two. */
+#define PGM_HANDY_PAGES             128
+/** The threshold at which allocation of more handy pages is flagged. */
+#define PGM_HANDY_PAGES_SET_FF      32
+/** The threshold at which we will allocate more when in ring-3.
+ * This is must be smaller than both PGM_HANDY_PAGES_SET_FF and
+ * PGM_HANDY_PAGES_MIN. */
+#define PGM_HANDY_PAGES_R3_ALLOC    8
+/** The threshold at which we will allocate more when in ring-0 or raw mode.
+ * The idea is that we should never go below this threshold while in ring-0 or
+ * raw mode because of PGM_HANDY_PAGES_RZ_TO_R3. However, should this happen and
+ * we are actually out of memory, we will have 8 page to get out of whatever
+ * code we're executing.
+ *
+ * This is must be smaller than both PGM_HANDY_PAGES_SET_FF and
+ * PGM_HANDY_PAGES_MIN. */
+#define PGM_HANDY_PAGES_RZ_ALLOC    8
+/** The threshold at which we force return to R3 ASAP.
+ * The idea is that this should be large enough to get out of any code and up to
+ * the main EM loop when we are out of memory.
+ * This must be less or equal to PGM_HANDY_PAGES_MIN. */
+#define PGM_HANDY_PAGES_RZ_TO_R3    24
+/** The minimum number of handy pages (after allocation).
+ * This must be greater or equal to PGM_HANDY_PAGES_SET_FF.
+ * Another name would be PGM_HANDY_PAGES_EXTRA_RESERVATION or _PARANOIA. :-) */
+#define PGM_HANDY_PAGES_MIN         32
 /** @} */
 
@@ -87 +119 @@
  * @{
  */
-
 /** VMM stack size. */
 #define VMM_STACK_SIZE              8192U
-
 /** @} */
 

trunk/include/VBox/vm.h

@@ -211 +211 @@
 /** PGM needs to allocate handy pages. */
 #define VM_FF_PGM_NEED_HANDY_PAGES      RT_BIT_32(18)
+/** PGM is out of memory.
+ * Abandon all loops and code paths which can be resumed and get up to the EM
+ * loops. */
+#define VM_FF_PGM_NO_MEMORY             RT_BIT_32(19)
 /** Check the interupt and trap gates */
-#define VM_FF_TRPM_SYNC_IDT             RT_BIT_32(19)
+#define VM_FF_TRPM_SYNC_IDT             RT_BIT_32(20)
 /** Check Guest's TSS ring 0 stack */
-#define VM_FF_SELM_SYNC_TSS             RT_BIT_32(20)
+#define VM_FF_SELM_SYNC_TSS             RT_BIT_32(21)
 /** Check Guest's GDT table */
-#define VM_FF_SELM_SYNC_GDT             RT_BIT_32(21)
+#define VM_FF_SELM_SYNC_GDT             RT_BIT_32(22)
 /** Check Guest's LDT table */
-#define VM_FF_SELM_SYNC_LDT             RT_BIT_32(22)
+#define VM_FF_SELM_SYNC_LDT             RT_BIT_32(23)
 /** Inhibit interrupts pending. See EMGetInhibitInterruptsPC(). */
-#define VM_FF_INHIBIT_INTERRUPTS        RT_BIT_32(23)
+#define VM_FF_INHIBIT_INTERRUPTS        RT_BIT_32(24)
 
 /** CSAM needs to scan the page that's being executed */
-#define VM_FF_CSAM_SCAN_PAGE            RT_BIT_32(24)
+#define VM_FF_CSAM_SCAN_PAGE            RT_BIT_32(26)
 /** CSAM needs to do some homework. */
-#define VM_FF_CSAM_PENDING_ACTION       RT_BIT_32(25)
+#define VM_FF_CSAM_PENDING_ACTION       RT_BIT_32(27)
 
 /** Force return to Ring-3. */
@@ -242 +246 @@
 /** High priority pre-execution actions. */
 #define VM_FF_HIGH_PRIORITY_PRE_MASK    (VM_FF_TERMINATE | VM_FF_DBGF | VM_FF_INTERRUPT_APIC | VM_FF_INTERRUPT_PIC | VM_FF_TIMER | VM_FF_DEBUG_SUSPEND \
-                                        | VM_FF_PGM_SYNC_CR3 | VM_FF_PGM_SYNC_CR3_NON_GLOBAL | VM_FF_SELM_SYNC_TSS | VM_FF_TRPM_SYNC_IDT | VM_FF_SELM_SYNC_GDT | VM_FF_SELM_SYNC_LDT | VM_FF_PGM_NEED_HANDY_PAGES)
+                                        | VM_FF_PGM_SYNC_CR3 | VM_FF_PGM_SYNC_CR3_NON_GLOBAL | VM_FF_SELM_SYNC_TSS | VM_FF_TRPM_SYNC_IDT | VM_FF_SELM_SYNC_GDT | VM_FF_SELM_SYNC_LDT | VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_PGM_NO_MEMORY)
 /** High priority pre raw-mode execution mask. */
-#define VM_FF_HIGH_PRIORITY_PRE_RAW_MASK (VM_FF_PGM_SYNC_CR3 | VM_FF_PGM_SYNC_CR3_NON_GLOBAL | VM_FF_SELM_SYNC_TSS | VM_FF_TRPM_SYNC_IDT | VM_FF_SELM_SYNC_GDT | VM_FF_SELM_SYNC_LDT | VM_FF_PGM_NEED_HANDY_PAGES \
-                                        | VM_FF_INHIBIT_INTERRUPTS)
+#define VM_FF_HIGH_PRIORITY_PRE_RAW_MASK (VM_FF_PGM_SYNC_CR3 | VM_FF_PGM_SYNC_CR3_NON_GLOBAL | VM_FF_SELM_SYNC_TSS | VM_FF_TRPM_SYNC_IDT | VM_FF_SELM_SYNC_GDT | VM_FF_SELM_SYNC_LDT \
+                                         | VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_INHIBIT_INTERRUPTS | VM_FF_PGM_NO_MEMORY)
 /** High priority post-execution actions. */
-#define VM_FF_HIGH_PRIORITY_POST_MASK   (VM_FF_PDM_CRITSECT | VM_FF_CSAM_PENDING_ACTION)
+#define VM_FF_HIGH_PRIORITY_POST_MASK   (VM_FF_PDM_CRITSECT | VM_FF_CSAM_PENDING_ACTION | VM_FF_PGM_NO_MEMORY)
 /** Normal priority post-execution actions. */
-#define VM_FF_NORMAL_PRIORITY_POST_MASK (VM_FF_TERMINATE | VM_FF_DBGF | VM_FF_RESET | VM_FF_CSAM_SCAN_PAGE)
+#define VM_FF_NORMAL_PRIORITY_POST_MASK (VM_FF_TERMINATE | VM_FF_DBGF | VM_FF_RESET | VM_FF_CSAM_SCAN_PAGE | VM_FF_PGM_NO_MEMORY)
 /** Normal priority actions. */
 #define VM_FF_NORMAL_PRIORITY_MASK      (VM_FF_REQUEST | VM_FF_PDM_QUEUES | VM_FF_PDM_DMA | VM_FF_REM_HANDLER_NOTIFY)
-/** Flags to check before resuming guest execution. */
+/** Flags to clear before resuming guest execution. */
 #define VM_FF_RESUME_GUEST_MASK         (VM_FF_TO_R3)
+/** Flags that causes the HWACCM loops to go back to ring-3. */
+#define VM_FF_HWACCM_TO_R3_MASK         (VM_FF_TO_R3 | VM_FF_TIMER | VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_PGM_NO_MEMORY)
 /** All the forced flags. */
 #define VM_FF_ALL_MASK                  (~0U)
 /** All the forced flags. */
-#define VM_FF_ALL_BUT_RAW_MASK          (~(VM_FF_HIGH_PRIORITY_PRE_RAW_MASK | VM_FF_CSAM_PENDING_ACTION | VM_FF_PDM_CRITSECT))
+#define VM_FF_ALL_BUT_RAW_MASK          (~(VM_FF_HIGH_PRIORITY_PRE_RAW_MASK | VM_FF_CSAM_PENDING_ACTION | VM_FF_PDM_CRITSECT) | VM_FF_PGM_NO_MEMORY)
 
 /** @} */
@@ -357 +363 @@
 #else
 # define VMCPU_FF_ISPENDING(pVM, idCpu, fFlags) VM_FF_ISPENDING(pVM, fFlags)
+#endif
+
+/** @def VM_FF_ISPENDING
+ * Checks if one or more force action in the specified set is pending while one
+ * or more other ones are not.
+ *
+ * @param   pVM     VM Handle.
+ * @param   fFlags  The flags to check for.
+ * @param   fExcpt  The flags that should not be set.
+ */
+#define VM_FF_IS_PENDING_EXCEPT(pVM, fFlags, fExcpt)            ( ((pVM)->fForcedActions & (fFlags)) && !((pVM)->fForcedActions & (fExcpt)) )
+
+/** @def VMCPU_FF_IS_PENDING_EXCEPT
+ * Checks if one or more force action in the specified set is pending for given
+ * VCPU while one or more other ones are not.
+ *
+ * @param   pVM     VM Handle.
+ * @param   idCpu   Virtual CPU ID.
+ * @param   fFlags  The flags to check for.
+ * @param   fExcpt  The flags that should not be set.
+ */
+#ifdef VBOX_WITH_SMP_GUESTS
+# define VMCPU_FF_IS_PENDING_EXCEPT(pVM, idCpu, fFlags, fExcpt) ( ((pVM)->aCpu[idCpu].fForcedActions & (fFlags)) && !((pVM)->aCpu[idCpu].fForcedActions & (fExcpt)) )
+#else
+# define VMCPU_FF_IS_PENDING_EXCEPT(pVM, idCpu, fFlags, fExcpt) VM_FF_ISPENDING(pVM, fFlags, fExcpt)
 #endif