On 03/08/2017 03:27 PM, Eduardo Habkost wrote:
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?
Right now the SEV specific CPUID is in AMD64 APM volume 2 [1].
[1] http://support.amd.com/TechDocs/24593.pdf
I will ask around to check when documentation team will update volume 3 to
include this CPUID.
~ Brijesh
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
[...]
