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| -rw-r--r-- | doc/source/admin/configuration/hypervisor-kvm.rst | 10 | ||||
| -rw-r--r-- | releasenotes/notes/bug-1845986-95cbede0a296b088.yaml | 21 |
2 files changed, 31 insertions, 0 deletions
diff --git a/doc/source/admin/configuration/hypervisor-kvm.rst b/doc/source/admin/configuration/hypervisor-kvm.rst index b0bd8ecc5d..2802ba84cb 100644 --- a/doc/source/admin/configuration/hypervisor-kvm.rst +++ b/doc/source/admin/configuration/hypervisor-kvm.rst @@ -684,6 +684,16 @@ explained above. Impermanent limitations ----------------------- +The following image metadata options are incompatible with the feature due to +`bug #1845986 <https://bugs.launchpad.net/nova/+bug/1845986>`__. + +- ``hw_scsi_model=virtio-scsi`` and either ``hw_disk_bus=scsi`` or + ``hw_cdrom_bus=scsi`` +- ``hw_video_model=virtio`` +- ``hw_qemu_guest_agent=yes`` + +This limitation will be resolved in the future. + The following limitations may be removed in the future as the hardware, firmware, and various layers of software receive new features: diff --git a/releasenotes/notes/bug-1845986-95cbede0a296b088.yaml b/releasenotes/notes/bug-1845986-95cbede0a296b088.yaml new file mode 100644 index 0000000000..cbb54cc1ac --- /dev/null +++ b/releasenotes/notes/bug-1845986-95cbede0a296b088.yaml @@ -0,0 +1,21 @@ +--- +issues: + - | + The support for guest RAM encryption using AMD SEV (Secure Encrypted + Virtualization) added in Train is incompatible with a number of image + metadata options: + + - ``hw_scsi_model=virtio-scsi`` and either ``hw_disk_bus=scsi`` or + ``hw_cdrom_bus=scsi`` + - ``hw_video_model=virtio`` + - ``hw_qemu_guest_agent=yes`` + + When used together, the guest kernel can malfunction with repeated warnings + like:: + + NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [system-udevd:272] + + This will be resolved in a future patch release. For more information, + refer to `bug 1845986`__ + + __ https://bugs.launchpad.net/nova/+bug/1845986 |