Changeset 92449 in vbox for trunk/src/VBox/VMM/VMMAll/NEMAllNativeTemplate-win.cpp.h

Timestamp:

Nov 16, 2021 10:37:10 AM (3 years ago)

Author:

vboxsync

Message:

VMM/NEM: Add NEMHCGetFeatures() to return a bitmask of features supported by the native NEM backend and make use of it in CPUMR3CpuId to determine whether to pass through xsave/xrstor support to the guest, bugref:9044

File:

• trunk/src/VBox/VMM/VMMAll/NEMAllNativeTemplate-win.cpp.h (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/NEMAllNativeTemplate-win.cpp.h

@@ -5118 +5118 @@
 }
 
+
+/**
+ * Returns features supported by the NEM backend.
+ *
+ * @returns Flags of features supported by the native NEM backend.
+ * @param   pVM             The cross context VM structure.
+ */
+VMM_INT_DECL(uint32_t) NEMHCGetFeatures(PVMCC pVM)
+{
+    RT_NOREF(pVM);
+    /** @todo Make use of the WHvGetVirtualProcessorXsaveState/WHvSetVirtualProcessorXsaveState
+     * interface added in 2019 to enable passthrough of xsave/xrstor (and depending) features to the guest. */
+    /** @todo Is NEM_FEAT_F_FULL_GST_EXEC always true? */
+    return NEM_FEAT_F_NESTED_PAGING | NEM_FEAT_F_FULL_GST_EXEC;
+}