Changeset 75683 in vbox for trunk/src

Timestamp:

Nov 23, 2018 11:08:15 AM (6 years ago)

Author:

vboxsync

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

126878

Message:

VMM: Nested VMX: bugref:9180 Implement monitor-trap flag VM-exit.

Location:

trunk/src/VBox/VMM

Files:

• VMMAll/IEMAll.cpp (modified) (3 diffs)
• VMMAll/IEMAllCImplVmxInstr.cpp.h (modified) (2 diffs)
• VMMR3/EM.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMAll/IEMAll.cpp

@@ -983 +983 @@
 IEM_STATIC VBOXSTRICTRC     iemVmxVmexitInitIpi(PVMCPU pVCpu);
 IEM_STATIC VBOXSTRICTRC     iemVmxVmexitIntWindow(PVMCPU pVCpu);
+IEM_STATIC VBOXSTRICTRC     iemVmxVmexitMtf(PVMCPU pVCpu);
 IEM_STATIC VBOXSTRICTRC     iemVmxVirtApicAccessMem(PVMCPU pVCpu, uint16_t offAccess, size_t cbAccess, void *pvData, uint32_t fAccess);
 IEM_STATIC VBOXSTRICTRC     iemVmxVmexitApicAccess(PVMCPU pVCpu, uint16_t offAccess, uint32_t fAccess);
@@ -15809 +15810 @@
  * @returns Strict VBox status code.
  * @param   pVCpu           The cross context virtual CPU structure of the calling EMT.
- * @param   uExitReason     The VM-exit reason.
- * @param   uExitQual       The VM-exit qualification.
- *
  * @thread  EMT(pVCpu)
  */
@@ -15818 +15816 @@
     IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_VMX_VMEXIT_MASK);
     VBOXSTRICTRC rcStrict = iemVmxVmexitIntWindow(pVCpu);
+    if (pVCpu->iem.s.cActiveMappings)
+        iemMemRollback(pVCpu);
+    return iemExecStatusCodeFiddling(pVCpu, rcStrict);
+}
+
+
+/**
+ * Interface for HM and EM to emulate VM-exits Monitor-Trap Flag (MTF).
+ *
+ * @returns Strict VBox status code.
+ * @param   pVCpu           The cross context virtual CPU structure of the calling EMT.
+ * @thread  EMT(pVCpu)
+ */
+VMM_INT_DECL(VBOXSTRICTRC)  IEMExecVmxVmexitMtf(PVMCPU pVCpu)
+{
+    IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_VMX_VMEXIT_MASK);
+    VBOXSTRICTRC rcStrict = iemVmxVmexitMtf(pVCpu);
     if (pVCpu->iem.s.cActiveMappings)
         iemMemRollback(pVCpu);

trunk/src/VBox/VMM/VMMAll/IEMAllCImplVmxInstr.cpp.h

@@ -1748 +1748 @@
     PVMXVVMCS pVmcs = pVCpu->cpum.GstCtx.hwvirt.vmx.CTX_SUFF(pVmcs);
 
-    /* Activity-state: VM-exits occur before changing the activity state, nothing further to do */
+    /*
+     * Activity state.
+     * Most VM-exits will occur in the active state. However, if the first instruction
+     * following the VM-entry is a HLT instruction, and the MTF VM-execution control is set,
+     * the VM-exit will be from the HLT activity state.
+     *
+     * See Intel spec. 25.5.2 "Monitor Trap Flag".
+     */
+    /** @todo NSTVMX: Does triple-fault VM-exit reflect a shutdown activity state or
+     *        not? */
+    EMSTATE enmActivityState = EMGetState(pVCpu);
+    switch (enmActivityState)
+    {
+        case EMSTATE_HALTED:    pVmcs->u32GuestActivityState = VMX_VMCS_GUEST_ACTIVITY_HLT;     break;
+        default:                pVmcs->u32GuestActivityState = VMX_VMCS_GUEST_ACTIVITY_ACTIVE;  break;
+    }
 
     /* Interruptibility-state. */
@@ -3002 +3017 @@
 
 /**
+ * VMX VM-exit handler for VM-exits due to Monitor-Trap Flag (MTF).
+ *
+ * @returns Strict VBox status code.
+ * @param   pVCpu   The cross context virtual CPU structure.
+ */
+IEM_STATIC VBOXSTRICTRC iemVmxVmexitMtf(PVMCPU pVCpu)
+{
+    /*
+     * The MTF VM-exit can occur even when the MTF VM-execution control is
+     * not set (e.g. when VM-entry injects an MTF pending event), so do not
+     * check for it here.
+     */
+    iemVmxVmcsSetExitQual(pVCpu, 0);
+    return iemVmxVmexit(pVCpu, VMX_EXIT_MTF);
+}
+
+
+/**
  * VMX VM-exit handler for VM-exits due to INVLPG.
  *
+ * @returns Strict VBox status code.
  * @param   pVCpu           The cross context virtual CPU structure.
  * @param   GCPtrPage       The guest-linear address of the page being invalidated.

trunk/src/VBox/VMM/VMMR3/EM.cpp

@@ -2261 +2261 @@
 
         /*
+         * VMX Nested-guest monitor-trap flag (MTF) VM-exit.
+         */
+#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
+        if (VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_MTF))
+        {
+            rc2 = VBOXSTRICTRC_VAL(IEMExecVmxVmexitMtf(pVCpu));
+            UPDATE_RC();
+        }
+#endif
+
+        /*
          * Allocate handy pages.
          */
@@ -2363 +2374 @@
         /* check that we got them all  */
         AssertCompile(VM_FF_HIGH_PRIORITY_PRE_MASK == (VM_FF_TM_VIRTUAL_SYNC | VM_FF_DBGF | VM_FF_CHECK_VM_STATE | VM_FF_DEBUG_SUSPEND | VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_PGM_NO_MEMORY | VM_FF_EMT_RENDEZVOUS));
-        AssertCompile(VMCPU_FF_HIGH_PRIORITY_PRE_MASK == (VMCPU_FF_TIMER | VMCPU_FF_INTERRUPT_APIC | VMCPU_FF_UPDATE_APIC | VMCPU_FF_INTERRUPT_PIC | VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL | VMCPU_FF_INHIBIT_INTERRUPTS | VMCPU_FF_DBGF | VMCPU_FF_INTERRUPT_NESTED_GUEST | VM_WHEN_RAW_MODE(VMCPU_FF_SELM_SYNC_TSS | VMCPU_FF_TRPM_SYNC_IDT | VMCPU_FF_SELM_SYNC_GDT | VMCPU_FF_SELM_SYNC_LDT, 0)));
+        AssertCompile(VMCPU_FF_HIGH_PRIORITY_PRE_MASK == (VMCPU_FF_TIMER | VMCPU_FF_INTERRUPT_APIC | VMCPU_FF_UPDATE_APIC | VMCPU_FF_INTERRUPT_PIC | VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL | VMCPU_FF_INHIBIT_INTERRUPTS | VMCPU_FF_DBGF | VMCPU_FF_INTERRUPT_NESTED_GUEST | VMCPU_FF_VMX_MTF | VM_WHEN_RAW_MODE(VMCPU_FF_SELM_SYNC_TSS | VMCPU_FF_TRPM_SYNC_IDT | VMCPU_FF_SELM_SYNC_GDT | VMCPU_FF_SELM_SYNC_LDT, 0)));
     }