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The data in question are 'cbitpos' denoting which addressing bit is the
encryption bit and 'reduced_phys_bits' denoting how many physical
address space we lose by turning on the encryption. Both of these are
hypervisor dependent and thus will be the same for all the guest
residing on the same host, but need to be specified for future migration
purposes.
But given we can probe them from domain capabilities, we don't need the
user to provide them and thus enhancing cli user experience. This
requires a new _SEV domaincapabilities XML class to be created so that
we can query the specific properties.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Policy is a 4-byte bitfield used to turn on/off certain behaviour within
the SEV firmware. For a detailed table of supported flags, see
https://libvirt.org/formatdomain.html#launchSecurity.
Most of the flags are related to advanced features (some of them don't
even exist at the moment), except for the first 2 bits which determine
whether debug mode should be turned on and whether the same key should
be used to encrypt memory of multiple guests respectively.
>From security POV, most users will probably want separate keys for
individual guests, thus the value 0x03 was selected as the policy
default.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Introduce both the launchSecurity XML and parser classes. While at it,
add launchSecurity as a property instance to the Guest class too.
The parser requires the 'type' argument to be mandatory since in the
future it will determine different code paths, therefore
'--launchSecurity foo=bar' is incorrect.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Erik Skultety <eskultet@redhat.com>
SupportCache.check_support(SUPPORT_FOOBAR, args) becomes
SupportCache.foobar(args)
And SupportCache absorbs the caching infrastructure from
VirtinstConnection.
For now we add some hackery to hide the API change from callers, but
this will be undone in the next patch
The memory hotplug changes only work on libvirt 5.3.0, among a few
other pieces. Still do the XML compare but skip domain define if
the new check_version_define comparison fails.
The <domain> XML it alters is called <seclabel>, and security is
really generic sounding. Add the alias and switch the documentation
over to prefer --seclabel
There can be more than 1 <memoryBacking><hugepages><page> element.
Adjust the cli options to match:
- hugepages.page[0-9]*.size
- hugepages.page[0-9]*.unit
- hugepages.page[0-9]*.nodeset
