RE: [PATCH v2 1/2] X86/Hyper-V: Add Guest IDLE MSR support

[Michael Kelley (EOSG)]

From: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>  Sent: Friday, September 21, 2018 12:25 AM
> 
> Hyper-V may expose a HV_X64_MSR_GUEST_IDLE MSR. We can read
> HYPERV_CPUID_FEATURES eax to check it. Read this MSR can
> trigger the guest's transition to the idle power state which
> can be exited by an IPI even if IF flag is disabled.
> 
> Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
> Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> Cc: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>
> Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
> ---
>  arch/x86/include/asm/hyperv-tlfs.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 

Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>