linux-kernel - Re: [PATCH] KVM: x86: Add Intel CPUID.1F cpuid emulation support

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Message-ID: <20190422165615.GD1236@linux.intel.com>
Date:   Mon, 22 Apr 2019 09:56:15 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:     Like Xu <like.xu@...ux.intel.com>, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: x86: Add Intel CPUID.1F cpuid emulation support

On Mon, Apr 22, 2019 at 11:53:33AM -0400, Konrad Rzeszutek Wilk wrote:
> On Mon, Apr 22, 2019 at 02:40:34PM +0800, Like Xu wrote:
> > Expose Intel V2 Extended Topology Enumeration Leaf to guest only when
> > host system has multiple software-visible die within each package.
> 
> Is there some doc on this?

It's in recent versions of the SDM, in the massive "Information Returned
by CPUID Instruction" table.