sinakarvandi/vmcs-auditor

VMCS Auditor provides almost all of Intel's VMCS Layout checklist based on Bochs Emulator.

vmcs-auditor's Issues

[Question] About the timing to call CheckVMXState

Hi, I have met error code 0x7 after executing vmlaunch, so I tried to use VMCS-Auditor to find out the reason.

I call CheckVMXState before executing VMLaunch, and it prints "VMFAIL: VMCS EXEC CTRL: VMX proc-based controls allowed 1-settings", so I check the value of vm->vmexec_ctrls2 and VMX_CHECKS_USE_MSR_VMX_PROCBASED_CTRLS_HI, which are 0x94006172 and 0x401e172. And the difference value 0x90000000 is what I add, means CPU_BASED_CTL2_ENABLE_VMFUNC and CPU_BASED_CTL2_ENABLE_VIRT_EXCEPTION.

I guess the reason of VMX_CHECKS_USE_MSR_VMX_PROCBASED_CTRLS_HI not equal to vmexec_ctrls2 is the value that I write to msr[VMCS_32BIT_CONTROL_PROCESSOR_BASED_VMEXEC_CONTROLS 0x4002] is not really loaded because of executing CheckVMXState befor VMLaunch.

As well as I think this error is not the real reason causes vmlanuch failed.

Hoping for your answer, thanks!