DOS ain't dead

Why CPUID hypervisor flag is set? (Miscellaneous)

posted by tkchia , 11.08.2021, 18:29

Hello CandyMan,

> Does anyone know why the processor returns
> CPUID.00000001h.ECX = 0xFE9AE383 and the flag set
> (Bit 31: Running on a hypervisor) on a real CPU?
> (Windows OS, CPU = Intel Xeon ES-2680, family 6, model 62, stepping 4).

No idea. Perhaps some hypervisor is indeed installed by the Windows setup? Try calling cpuid leaf 0x40000000 ( https://sandpile.org/x86/cpuid.htm#level_4000_0000h ) and see what it says...

Thank you!

---
https://gitlab.com/tkchia · https://codeberg.org/tkchia · 😴 "MOV AX,0D500H+CMOS_REG_D+NMI"

Complete thread:

• Why CPUID hypervisor flag is set? - CandyMan, 11.08.2021, 17:31 (Miscellaneous)
  • Why CPUID hypervisor flag is set? - tkchia, 11.08.2021, 18:29
    • Why CPUID hypervisor flag is set? - Rugxulo, 11.08.2021, 22:31
  • Why CPUID hypervisor flag is set? - alexfru, 12.08.2021, 09:35
    • Why CPUID hypervisor flag is set? - RayeR, 14.08.2021, 15:38
      • Why CPUID hypervisor flag is set? - alexfru, 16.08.2021, 03:15
        • Why CPUID hypervisor flag is set? - RayeR, 16.08.2021, 03:29
          • Why CPUID hypervisor flag is set? - alexfru, 16.08.2021, 07:20