Changeset 78976 in vbox for trunk/include/VBox

Timestamp:

Jun 5, 2019 6:22:44 AM (6 years ago)

Author:

vboxsync

Message:

cpum.h: Nested VMX: bugref:9180 Add CPUMIsGuestVmxXcptInterceptSet.

File:

• trunk/include/VBox/vmm/cpum.h (modified) (1 diff)

trunk/include/VBox/vmm/cpum.h

@@ -2101 +2101 @@
 
 /**
+ * Checks whether the given exception causes a VM-exit.
+ *
+ * The exception type include hardware exceptions, software exceptions (#BP, #OF)
+ * and privileged software exceptions (#DB generated by INT1/ICEBP).
+ *
+ * Software interrupts do -not- cause VM-exits and hence must not be used with this
+ * function.
+ *
+ * @returns @c true if the exception causes a VM-exit, @c false otherwise.
+ * @param   pVCpu       The cross context virtual CPU structure of the calling EMT.
+ * @param   pCtx        Pointer to the context.
+ * @param   uVector     The exception vector.
+ * @param   uErrCode    The error code associated with the exception. Pass 0 if not
+ *                      applicable.
+ */
+DECLINLINE(bool) CPUMIsGuestVmxXcptInterceptSet(PCVMCPU pVCpu, PCCPUMCTX pCtx, uint8_t uVector, uint32_t uErrCode)
+{
+    Assert(uVector <= X86_XCPT_LAST);
+
+    RT_NOREF(pVCpu);
+    PCVMXVVMCS pVmcs = pCtx->hwvirt.vmx.CTX_SUFF(pVmcs);
+    Assert(pVmcs);
+    Assert(CPUMIsGuestInVmxNonRootMode(pCtx));
+
+    /* NMIs have a dedicated VM-execution control for causing VM-exits. */
+    if (uVector == X86_XCPT_NMI)
+        return RT_BOOL(pVmcs->u32PinCtls & VMX_PIN_CTLS_NMI_EXIT);
+
+    /* Page-faults are subject to masking using its error code. */
+    uint32_t fXcptBitmap = pVmcs->u32XcptBitmap;
+    if (uVector == X86_XCPT_PF)
+    {
+        uint32_t const fXcptPFMask  = pVmcs->u32XcptPFMask;
+        uint32_t const fXcptPFMatch = pVmcs->u32XcptPFMatch;
+        if ((uErrCode & fXcptPFMask) != fXcptPFMatch)
+            fXcptBitmap ^= RT_BIT(X86_XCPT_PF);
+    }
+
+    /* Consult the exception bitmap for all other exceptions. */
+    if (fXcptBitmap & RT_BIT(uVector))
+        return true;
+    return false;
+}
+
+/**
  * Implements VMSucceed for VMX instruction success.
  *