Merge pull request #69225 from ousleyp/cnv-35107

CNV#35107: bugfix in VM memory overhead section

Author: ousleyp

modules/virt-cluster-resource-requirements.adoc

@@ -34,14 +34,19 @@ Additionally, {VirtProductName} environment resources require a total of 2179 Mi
 .Virtual machine memory overhead
 
 ----
-Memory overhead per virtual machine ≈ (1.002 * requested memory) + 146 MiB  \
-              + 8 MiB * (number of vCPUs) \ <1>
-              + 16 MiB * (number of graphics devices) <2>
+Memory overhead per virtual machine ≈ (1.002 × requested memory) \
+              + 218 MiB \ <1>
+              + 8 MiB × (number of vCPUs) \ <2>
+              + 16 MiB × (number of graphics devices) \ <3>
+              + (additional memory overhead) <4>
 ----
-<1> Number of virtual CPUs requested by the virtual machine
-<2> Number of virtual graphics cards requested by the virtual machine
-
-If your environment includes a Single Root I/O Virtualization (SR-IOV) network device or a Graphics Processing Unit (GPU), allocate 1 GiB additional memory overhead for each device.
+<1> Required for the processes that run in the `virt-launcher` pod.
+<2> Number of virtual CPUs requested by the virtual machine.
+<3> Number of virtual graphics cards requested by the virtual machine.
+<4> Additional memory overhead:
+* If your environment includes a Single Root I/O Virtualization (SR-IOV) network device or a Graphics Processing Unit (GPU), allocate 1 GiB additional memory overhead for each device.
+* If Secure Encrypted Virtualization (SEV) is enabled, add 256 MiB.
+* If Trusted Platform Module (TPM) is enabled, add 53 MiB.
 
 [discrete]
 [id="CPU-overhead_{context}"]