I want to test if my processor support VMFUNC which is described as:
>
>
> The IA32_VMX_VMFUNC MSR exists only on processors that support the
> 1-setting of the “activate secondary controls” VM-execution control (only if*
> bit 63 of the IA32_VMX_PROCBASED_CTLS MSR is 1*) and the 1-setting of the
> “enable VM functions” secondary processor-based VM-execution control (only
> if* bit 45 of the IA32_VMX_PROCBASED_CTLS2 MSR is 1*).
So in order to do that, I need to use rdmsr as follows:
//IA32_VMX_PROCBASED_CTLS
> __asm__ __volatile__("rdmsr" : "=a" (eax), "=d" (edx) : "c" (0x482));
//IA32_VMX_PROCBASED_CTLS 2
__asm__ __volatile__("rdmsr" : "=a" (eax), "=d" (edx) : "c" (0x48B));
But both the rdmsr instruction would cause a #GP, even when I run it from
the native linux as a root user and without xen running.
So is there a way to use the rdmsr in dom0?
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