Re: [Qemu-devel] [PATCH] i386/kvm: expose HV_CPUID_ENLIGHTMENT_INFO.EAX and HV_CPUID_NESTED_FEATURES.EAX as feature words

[Roman Kagan]

On Mon, Nov 26, 2018 at 02:59:58PM +0100, Vitaly Kuznetsov wrote:
> It was found that QMP users of QEMU (e.g. libvirt) may need
> HV_CPUID_ENLIGHTMENT_INFO.EAX/HV_CPUID_NESTED_FEATURES.EAX information. In
> particular, 'hv_tlbflush' and 'hv_evmcs' enlightenments are only exposed in
> HV_CPUID_ENLIGHTMENT_INFO.EAX.
> 
> HV_CPUID_NESTED_FEATURES.EAX is exposed for two reasons: convenience
> (we don't need to export it from hyperv_handle_properties() and as
> future-proof for Enlightened MSR-Bitmap, PV EPT invalidation and
> direct virtual flush features.
> 
> Signed-off-by: Vitaly Kuznetsov <address@hidden>
> ---
>  target/i386/cpu.c | 30 +++++++++++++++++
>  target/i386/cpu.h |  2 ++
>  target/i386/kvm.c | 85 +++++++++++++++++++++++++----------------------
>  3 files changed, 77 insertions(+), 40 deletions(-)

Reviewed-by: Roman Kagan <address@hidden>