From: David Gibson <david@gibson.dropbear.id.au>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: pair@us.ibm.com, cohuck@redhat.com, brijesh.singh@amd.com,
kvm@vger.kernel.org, David Hildenbrand <david@redhat.com>,
qemu-devel@nongnu.org, frankja@linux.ibm.com,
pragyansri.pathi@intel.com, mst@redhat.com,
mdroth@linux.vnet.ibm.com, pasic@linux.ibm.com,
borntraeger@de.ibm.com, andi.kleen@intel.com, thuth@redhat.com,
Eduardo Habkost <ehabkost@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Greg Kurz <groug@kaod.org>,
qemu-s390x@nongnu.org, jun.nakajima@intel.com,
berrange@redhat.com, Marcelo Tosatti <mtosatti@redhat.com>,
qemu-ppc@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH v7 02/13] confidential guest support: Introduce new confidential guest support class
Date: Fri, 29 Jan 2021 13:32:09 +1100 [thread overview]
Message-ID: <20210129023209.GH6951@yekko.fritz.box> (raw)
In-Reply-To: <20210121090807.GA3072@work-vm>
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On Thu, Jan 21, 2021 at 09:08:07AM +0000, Dr. David Alan Gilbert wrote:
> * David Gibson (david@gibson.dropbear.id.au) wrote:
> > On Mon, Jan 18, 2021 at 06:51:24PM +0000, Dr. David Alan Gilbert wrote:
> > > * David Gibson (david@gibson.dropbear.id.au) wrote:
> > > > Several architectures have mechanisms which are designed to protect guest
> > > > memory from interference or eavesdropping by a compromised hypervisor. AMD
> > > > SEV does this with in-chip memory encryption and Intel's MKTME can do
> > > ^^^^^
> > > (and below) My understanding is that it's Intel TDX that's the VM
> > > equivalent.
> >
> > I thought MKTME could already do memory encryption and TDX extended
> > that to... more? I'll adjust the comment to say TDX anyway, since
> > that seems to be the newer name.
>
> My understanding was MKTME does the memory encryption, but doesn't
> explicitly wire that into VMs or attestation of VMs or anything like
> that. TDX wires that encryption to VMs and provides all the other glue
> that goes with attestation and the like.
Ok.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2021-01-29 5:10 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 23:57 [PATCH v7 00/13] Generalize memory encryption models David Gibson
2021-01-13 23:57 ` [PATCH v7 01/13] qom: Allow optional sugar props David Gibson
2021-01-13 23:58 ` [PATCH v7 02/13] confidential guest support: Introduce new confidential guest support class David Gibson
2021-01-14 9:34 ` Daniel P. Berrangé
2021-01-14 10:42 ` David Gibson
2021-01-18 18:51 ` Dr. David Alan Gilbert
2021-01-21 1:06 ` David Gibson
2021-01-21 9:08 ` Dr. David Alan Gilbert
2021-01-29 2:32 ` David Gibson [this message]
2021-01-13 23:58 ` [PATCH v7 03/13] sev: Remove false abstraction of flash encryption David Gibson
2021-01-15 12:54 ` Cornelia Huck
2021-01-18 2:59 ` David Gibson
2021-01-13 23:58 ` [PATCH v7 04/13] confidential guest support: Move side effect out of machine_set_memory_encryption() David Gibson
2021-01-15 12:56 ` Cornelia Huck
2021-01-13 23:58 ` [PATCH v7 05/13] confidential guest support: Rework the "memory-encryption" property David Gibson
2021-01-15 13:06 ` Cornelia Huck
2021-01-13 23:58 ` [PATCH v7 06/13] sev: Add Error ** to sev_kvm_init() David Gibson
2021-01-13 23:58 ` [PATCH v7 07/13] confidential guest support: Introduce cgs "ready" flag David Gibson
2021-01-14 8:55 ` Greg Kurz
2021-01-15 13:12 ` Cornelia Huck
2021-01-18 19:47 ` Dr. David Alan Gilbert
2021-01-19 8:16 ` Cornelia Huck
2021-02-02 1:41 ` David Gibson
2021-01-29 6:30 ` David Gibson
2021-01-13 23:58 ` [PATCH v7 08/13] confidential guest support: Move SEV initialization into arch specific code David Gibson
2021-01-15 13:24 ` Cornelia Huck
2021-01-18 3:03 ` David Gibson
2021-01-18 8:03 ` Cornelia Huck
2021-01-29 3:12 ` David Gibson
2021-01-13 23:58 ` [PATCH v7 09/13] confidential guest support: Update documentation David Gibson
2021-01-14 10:07 ` Greg Kurz
2021-01-15 15:36 ` Cornelia Huck
2021-01-29 2:36 ` David Gibson
2021-01-13 23:58 ` [PATCH v7 10/13] spapr: Add PEF based confidential guest support David Gibson
2021-01-14 10:39 ` Greg Kurz
2021-01-29 6:23 ` David Gibson
2021-01-15 15:41 ` Cornelia Huck
2021-01-29 2:43 ` David Gibson
2021-01-13 23:58 ` [PATCH v7 11/13] spapr: PEF: prevent migration David Gibson
2021-01-13 23:58 ` [PATCH v7 12/13] confidential guest support: Alter virtio default properties for protected guests David Gibson
2021-01-13 23:58 ` [PATCH v7 13/13] s390: Recognize confidential-guest-support option David Gibson
2021-01-14 9:10 ` Christian Borntraeger
2021-01-14 9:19 ` Christian Borntraeger
2021-01-14 9:24 ` Christian Borntraeger
2021-01-15 0:13 ` David Gibson
2021-01-14 11:45 ` David Gibson
2021-01-15 16:36 ` Cornelia Huck
2021-01-18 17:06 ` Christian Borntraeger
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