On 6/14/22 14:19, Vitaly Kuznetsov wrote:
The latest version: https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/tlfs/datatypes/hv_vmx_enlightened_vmcs has it, actually. It was missing before (compare with e.g. 6.0b version here: https://github.com/MicrosoftDocs/Virtualization-Documentation/raw/live/tlfs/Hypervisor%20Top%20Level%20Functional%20Specification%20v6.0b.pdf) but AFAIR TSC scaling wasn't advertised by genuine Hyper-V either. Interestingly enough, eVMCS version didn't change when these fields were added, it is still '1'. I even have a patch in my stash (attached). I didn't send it out because it wasn't properly tested with different Hyper-V versions. -- Vitaly
Anirudh, can you check if Vitaly's patches work for you? Paolo
