config-tools: add NVMX_ENABLED feature and GUEST_FLAG_NVMX_ENABLED flag

NVMX_ENABLED: ACRN is built to support nested virtualization if set.

GUEST_FLAG_NVMX_ENABLED: indicates that the VMX capability can be present
in this guest to run nested VMs.

Tracked-On: #5923
Signed-off-by: Zide Chen <zide.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

misc/config_tools/schema/VMtypes.xsd

@@ -36,7 +36,8 @@
 - ``GUEST_FLAG_IO_COMPLETION_POLLING`` specify that the hypervisor needs
   IO polling to completion
 - ``GUEST_FLAG_HIDE_MTRR`` specify that MTRR is hidden from the VM
-- ``GUEST_FLAG_RT`` specify that the VM is an RT-VM (real-time)</xs:documentation>
+- ``GUEST_FLAG_RT`` specify that the VM is an RT-VM (real-time)
+- ``GUEST_FLAG_NVMX_ENABLED`` specify that the VM supports nested virtualization</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:string">
     <xs:enumeration value="" />
@@ -47,6 +48,7 @@
     <xs:enumeration value="GUEST_FLAG_IO_COMPLETION_POLLING" />
     <xs:enumeration value="GUEST_FLAG_HIDE_MTRR" />
     <xs:enumeration value="GUEST_FLAG_RT" />
+    <xs:enumeration value="GUEST_FLAG_NVMX_ENABLED" />
   </xs:restriction>
 </xs:simpleType>
 

misc/config_tools/schema/config.xsd

@@ -123,6 +123,11 @@ support RDT or CDP, setting this option to ``y`` is ignored.</xs:documentation>
         <xs:documentation>Enable Hyper-V.</xs:documentation>
       </xs:annotation>
     </xs:element>
+    <xs:element name="NVMX_ENABLED" type="Boolean" default="n">
+      <xs:annotation>
+        <xs:documentation>Enable nested virtualization.</xs:documentation>
+      </xs:annotation>
+    </xs:element>
     <xs:element name="IOMMU_ENFORCE_SNP" type="Boolean" default="n">
       <xs:annotation>
         <xs:documentation>Specify if the IOMMU enforces snoop behavior
@@ -158,6 +163,7 @@ Machine Check Error on Page Size Change.</xs:documentation>
     </xs:element>
   </xs:all>
   <xs:assert test="not (RDT/RDT_ENABLED = 'y' and PSRAM/PSRAM_ENABLED = 'y')"/>
+  <xs:assert test="not (NVMX_ENABLED = 'y' and not (SCHEDULER = 'SCHED_NOOP'))"/>
 </xs:complexType>
 
 <xs:complexType name="MemoryOptionsType">

misc/config_tools/xforms/config_common.xsl

@@ -95,6 +95,10 @@
       <xsl:with-param name="key" select="'HYPERV_ENABLED'" />
     </xsl:call-template>
 
+    <xsl:call-template name="boolean-by-key">
+      <xsl:with-param name="key" select="'NVMX_ENABLED'" />
+    </xsl:call-template>
+
     <xsl:call-template name="boolean-by-key">
       <xsl:with-param name="key" select="'ACPI_PARSE_ENABLED'" />
     </xsl:call-template>