[PATCH 0/1][kinetic/linux-azure] Azure: Performance improvement for TDX

[Tim Gardner]

https://bugs.launchpad.net/bugs/2004090

SRU Justification

[Impact]

ms_hyperv_init_platform() hides HV_MSR_REFERENCE_TSC_AVAILABLE for TDX guests in
favor of Invariant-TSC. In this case, we should also downgrade the rating of
hyperv_cs_msr.rating, so Invariant-TSC can be used by default.

[Fix]

https://github.com/dcui/tdx.git 367f18c06ac999c2822b0c24f50a87994635d4bd

[Where things could go wrong]

TDX guests may perform worse.