Changeset 73774 in vbox for trunk/include

Timestamp:

Aug 20, 2018 8:36:16 AM (6 years ago)

Author:

vboxsync

Message:

hm_vmx.h: Nested VMX: bugref:9180 Add VMCS field access-type, type and HMVmxIsVmcsFieldReadOnly.

File:

• trunk/include/VBox/vmm/hm_vmx.h (modified) (2 diffs)

trunk/include/VBox/vmm/hm_vmx.h

@@ -1781 +1781 @@
 
 
-/** @name VMCS field encoding: Widths
+/** @name VMCS field encoding: Access.
+ * @{ */
+typedef enum
+{
+    VMXVMCSFIELDACCESS_FULL = 0,
+    VMXVMCSFIELDACCESS_HIGH
+} VMXVMCSFIELDACCESS;
+AssertCompileSize(VMXVMCSFIELDACCESS, 4);
+/** @} */
+
+
+/** @name VMCS field encoding: Type.
+ * @{ */
+typedef enum
+{
+    VMXVMCSFIELDTYPE_CONTROL = 0,
+    VMXVMCSFIELDTYPE_VMEXIT_INFO,
+    VMXVMCSFIELDTYPE_GUEST_STATE,
+    VMXVMCSFIELDTYPE_HOST_STATE
+} VMXVMCSFIELDTYPE;
+AssertCompileSize(VMXVMCSFIELDTYPE, 4);
+/** @} */
+
+
+/** @name VMCS field encoding: Width.
  * @{ */
 typedef enum
@@ -2844 +2868 @@
     return (uFieldEnc >> 13) & 0x3;
 }
+
+
+/**
+ * Returns whether the given VMCS field is a read-only VMCS field or not.
+ *
+ * @returns @c true if it's a read-only field, @c false otherwise.
+ * @param   uFieldEnc   The VMCS field encoding.
+ *
+ * @remarks Warning! This function does not verify the encoding is for a valid and
+ *          supported VMCS field.
+ */
+DECLINLINE(bool) HMVmxIsVmcsFieldReadOnly(uint32_t uFieldEnc)
+{
+    /* See Intel spec. B.4.2 "Natural-Width Read-Only Data Fields". */
+    return (RT_BF_GET(uFieldEnc, VMX_BF_VMCS_ENC_TYPE) == VMXVMCSFIELDTYPE_VMEXIT_INFO);
+}
 /** @} */