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Re: [Qemu-devel] [RFC PATCH v4 00/20] x86: Secure Encrypted Virtualizati

From: Eduardo Habkost
Subject: Re: [Qemu-devel] [RFC PATCH v4 00/20] x86: Secure Encrypted Virtualization (AMD)
Date: Wed, 8 Mar 2017 18:27:15 -0300
User-agent: Mutt/1.7.1 (2016-10-04)

On Wed, Mar 08, 2017 at 03:51:07PM -0500, Brijesh Singh wrote:
> This RFC series provides support for AMD's new Secure Encrypted 
> Virtualization (SEV) feature. This RFC is based KVM RFC [1].
> SEV is an extension to the AMD-V architecture which supports running
> multiple VMs under the control of a hypervisor. The SEV feature allows
> the memory contents of a virtual machine (VM) to be transparently encrypted
> with a key unique to the guest VM. The memory controller contains a
> high performance encryption engine which can be programmed with multiple
> keys for use by a different VMs in the system. The programming and
> management of these keys is handled by the AMD Secure Processor firmware
> which exposes a commands for these tasks.
> The KVM RFC introduced a new ioctl (KVM_MEMORY_ENCRYPTION_OP) which can be
> used by qemu to issue the SEV commands to assist performing common hypervisor
> activities such as a launching, running, snapshooting, migration and debugging
> guests.
> The following links provide additional details:
> AMD Memory Encryption whitepaper:
> http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2013/12/AMD_Memory_Encryption_Whitepaper_v7-Public.pdf
> AMD64 Architecture Programmer's Manual:
>     http://support.amd.com/TechDocs/24593.pdf
>     SME is section 7.10
>     SEV is section 15.34

I am looking for detailed CPUID documentation, and latest version
of Volume 3 I can find
(http://support.amd.com/TechDocs/24594.pdf) is from June 2015 and
doesn't include CPUID Fn8000_001F.

Is there a public updated version of AMD64 Architecture
Programmer's Manual Volume 3 including SEV CPUID info?

> Secure Encrypted Virutualization Key Management:
> http://support.amd.com/TechDocs/55766_SEV-KM API_Specification.pdf
> KVM Forum slides:
> http://www.linux-kvm.org/images/7/74/02x08A-Thomas_Lendacky-AMDs_Virtualizatoin_Memory_Encryption_Technology.pdf
> KVM RFC link:
> [1] http://marc.info/?l=linux-mm&m=148846752931115&w=2
> Video of the KVM Forum Talk:
> https://www.youtube.com/watch?v=RcvQ1xN55Ew


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