linux-kernel - RE: [PATCH v3 6/7] x86/hyper-v: detect nested features

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Message-ID: <DM5PR2101MB10303386AACC2FE30227B7B9DCD20@DM5PR2101MB1030.namprd21.prod.outlook.com>
Date:   Tue, 13 Mar 2018 23:11:50 +0000
From:   "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
CC:     "x86@...nel.org" <x86@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Mohammed Gamal <mmorsy@...hat.com>,
        Cathy Avery <cavery@...hat.com>, Bandan Das <bsd@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v3 6/7] x86/hyper-v: detect nested features

> -----Original Message-----
> From: Vitaly Kuznetsov <vkuznets@...hat.com>
> Sent: Friday, March 9, 2018 6:03 AM
> To: kvm@...r.kernel.org
> Cc: x86@...nel.org; Paolo Bonzini <pbonzini@...hat.com>; Radim Krčmář
> <rkrcmar@...hat.com>; KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Stephen Hemminger <sthemmin@...rosoft.com>; Michael
> Kelley (EOSG) <Michael.H.Kelley@...rosoft.com>; Mohammed Gamal
> <mmorsy@...hat.com>; Cathy Avery <cavery@...hat.com>; Bandan Das <bsd@...hat.com>;
> linux-kernel@...r.kernel.org
> Subject: [PATCH v3 6/7] x86/hyper-v: detect nested features
> 
> TLFS 5.0 says: "Support for an enlightened VMCS interface is reported with
> CPUID leaf 0x40000004. If an enlightened VMCS interface is supported,
>  additional nested enlightenments may be discovered by reading the CPUID
> leaf 0x4000000A (see 2.4.11)."
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>