Re: [PATCH v2 1/8] docs: documentation and schema for the new TPM Proxy model
On 5/13/20 12:45 PM, Stefan Berger wrote:
[...]
I think users need to understand that a pSeries guest will not benefit from this but only
a pSeries guest that is a secure virtual machine that needs special hardware to run and
where there is an Ultravisor. Everyone would want more security for their pSeries guest,
especially if it comes for free. Unfortunately this is not the case and one needs new
hardware...
True. I propose this wording:
<span class="since">Since 6.4.0</span>, a new model
called
<code>spapr-tpm-proxy</code> was added for pSeries guests. This
model
only works with the 'passthrough' backend. It creates a TPM Proxy
device that communicates with an existing TPM Resource Manager in the host,
for example /dev/tpmrm0, to enable secure virtual machine support for the
guest with the help of an Ultravisor. Adding a TPM Proxy to a pSeries guest
brings no security benefits unless the guest is running in a PPC64 host that
has Ultravisor support and access to a TPM Resource Manager. Only one TPM
Proxy device is allowed per guest, but a TPM Proxy device can be added
together
with other TPM devices.
If you agree, I'll use a similar text in the news.xml changes (patch 8/8) as well.
Thanks,
DHB
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> DHB