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Re: [Xen-devel] Status of nestedhvm (on Intel)

And it's documented in A.6 (Appendix A).

The IA32_VMX_MISC MSR (index 485H) consists of the following fields:

On Fri, May 4, 2012 at 9:02 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>>> On 04.05.12 at 17:49, Christian Tramnitz <chris.ace@xxxxxxx> wrote:
> Ian Campbell <Ian.Campbell <at> citrix.com> writes:
>> AFAIK it is going to be an (experimental) feature in 4.2.
> Short follow-up: I haven't tried with Hyper-V yet, but on current (today's
> unstable.hg) Xen 4.2 at least ESXi does not work. VMX flag is visible, but
> during load ESXi 5u1 crashes and Xen log shows:
> (XEN) vvmx.c:1366:d8 VMX MSR 485 not fully supported yet.
> (XEN) hvm.c:1143:d8 All CPUs offline -- powering off.
> Does anyone have an idea what MSR 485 does? It is not documented in "Intel
> 64 and IA-32 Architectures Software Developer's Manual"...

xen/include/asm-x86/msr-index.h says

#define MSR_IA32_VMX_MISC                       0x485


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