Re: [Part2 PATCH v6 00/38] x86: Secure Encrypted Virtualization (AMD)

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Hi Herbert and Paolo,


On 10/19/17 9:33 PM, Brijesh Singh wrote:
> This part of Secure Encryted Virtualization (SEV) patch series focuses on KVM
> changes required to create and manage SEV guests.
>
> SEV is an extension to the AMD-V architecture which supports running encrypted
> virtual machine (VMs) under the control of a hypervisor. Encrypted VMs have their
> pages (code and data) secured such that only the guest itself has access to
> unencrypted version. Each encrypted VM is associated with a unique encryption key;
> if its data is accessed to a different entity using a different key the encrypted
> guest's data will be incorrectly decrypted, leading to unintelligible data.
> This security model ensures that hypervisor will no longer able to inspect or
> alter any guest code or data.
>
> The key management of this feature is handled by a separate processor known as
> the AMD Secure Processor (AMD-SP) which is present on AMD SOCs. The SEV Key
> Management Specification (see below) provides a set of commands which can be
> used by hypervisor to load virtual machine keys through the AMD-SP driver.

Since the PSP patches touches both the CCP and KVM driver, hence I was
wondering if you guys have any thought on how PSP patches will be
merged? I am talking about Patch 9 to 20 from this series. I have
ensured that patches apply cleanly on both kvm/master and
cryptodev-2.6/master. We can do this in one of two ways:

- Paolo can merge the PSP support through the KVM branch

or

- Herbert can create a topic branch with PSP changes and Paolo can use
that topic branch.

Any visibility will help my next submission. thank you.

-Brijesh




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