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Date: Tue, 10 Aug 2021 08:05:10 +0200
From: "Gerd Hoffmann" <kraxel@redhat.com>
To: devel@edk2.groups.io, ashish.kalra@amd.com
Cc: Tom Lendacky <thomas.lendacky@amd.com>, dovmurik@linux.vnet.ibm.com,
	brijesh.singh@amd.com, tobin@ibm.com, jejb@linux.ibm.com,
	jordan.l.justen@intel.com, ard.biesheuvel@arm.com,
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Subject: Re: [edk2-devel] [PATCH v6 1/6] OvmfPkg/BaseMemEncryptLib: Detect SEV live migration feature.
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  Hi,

> > I still really don't understand the need for the CPUID loop. KVM only ever
> > programs CPUID function 0x40000000, right?

Nope.  When you enable hyper-v emulation features you'll go find the kvm
cpuid @ 0x40000000 and the hyper-v cpuid @ 0x40000100 (or the other way
around, not sure).

take care,
  Gerd