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From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: "Singh, Brijesh" <brijesh.singh@amd.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH v3 00/11] Add AMD SEV guest live migration support
Date: Fri, 12 Jul 2019 11:52:15 -0400
Message-ID: <20190712155215.GA12840@char.us.oracle.com> (raw)
In-Reply-To: <20190710201244.25195-1-brijesh.singh@amd.com>

On Wed, Jul 10, 2019 at 08:12:59PM +0000, Singh, Brijesh wrote:
> The series add support for AMD SEV guest live migration commands. To protect the
> confidentiality of an SEV protected guest memory while in transit we need to
> use the SEV commands defined in SEV API spec [1].
> 
> SEV guest VMs have the concept of private and shared memory. Private memory
> is encrypted with the guest-specific key, while shared memory may be encrypted
> with hypervisor key. The commands provided by the SEV FW are meant to be used
> for the private memory only. The patch series introduces a new hypercall.
> The guest OS can use this hypercall to notify the page encryption status.
> If the page is encrypted with guest specific-key then we use SEV command during
> the migration. If page is not encrypted then fallback to default.
> 

I am bit lost. Why can't the hypervisor keep track of hypervisor key pages
and treat all other pages as owned by the guest and hence using the guest-specific
key?


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-10 20:12 Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 01/11] KVM: SVM: Add KVM_SEV SEND_START command Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 02/11] KVM: SVM: Add KVM_SEND_UPDATE_DATA command Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 03/11] KVM: SVM: Add KVM_SEV_SEND_FINISH command Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 04/11] KVM: SVM: Add support for KVM_SEV_RECEIVE_START command Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 05/11] KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 06/11] KVM: SVM: Add KVM_SEV_RECEIVE_FINISH command Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 07/11] KVM: x86: Add AMD SEV specific Hypercall3 Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 08/11] KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 09/11] KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 10/11] mm: x86: Invoke hypercall when page encryption status is changed Singh, Brijesh
2019-07-10 20:13 ` [PATCH v3 11/11] KVM: x86: Introduce KVM_SET_PAGE_ENC_BITMAP ioctl Singh, Brijesh
2019-07-12 15:52 ` Konrad Rzeszutek Wilk [this message]
2019-07-12 16:31   ` [PATCH v3 00/11] Add AMD SEV guest live migration support Singh, Brijesh

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