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feat(instances): a shut-off VM with a TPM migrates with its TPM state

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A shut-off VM with TPM state, as every Windows 11 VM, was refused for
migration: the state is a file of the source host, and an offline move
would start it there with a new TPM. Such a VM now migrates as a shut-off
VM with disks to copy does: its UEFI variables are copied, it is started
paused, its CPUs never run, migrates live, which carries the TPM state,
and is shut off on the destination. A shut-off VM with a saved state is
refused before any of that, for every way it moves: started paused, it
would resume and then lose the saved memory.

The clone tab says that a clone gets a new, empty TPM, and the destroy
page that the TPM state goes with the VM.
This commit is contained in:
catborise 2026-11-01 17:27:38 +03:00
parent e35342bff1
commit dbc7e688ac
11 changed files with 168 additions and 105 deletions
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11
vrtManager/tests/test_migration.py
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@ -225,17 +225,6 @@ class ShutOffMigrationTestCase(unittest.TestCase):
self.assertEqual(source.instance.calls, [])
self.assertEqual(source.instance.undefined, libvirt.VIR_DOMAIN_UNDEFINE_KEEP_NVRAM)
def test_a_vm_with_tpm_state_is_refused(self):
"""That state stays on the source host: the VM would start on the
destination with a new TPM."""
host = FakeHost()
xml = "<domain><devices><tpm model='tpm-crb'><backend type='emulator' version='2.0'/></tpm></devices></domain>"
source = FakeSource(5, xml=xml)
with self.assertRaisesRegex(util.OperationError, "migrate it live"):
destination(host).moveto(source, "vm", live=False, unsafe=False, offline=True)
self.assertEqual(host.defined, [])
self.assertIsNone(source.instance.undefined)
def test_a_tpm_without_local_state_moves(self):
xml = "<domain><devices><tpm model='tpm-tis'><backend type='passthrough'/></tpm></devices></domain>"
host = FakeHost()