** Description changed:

+ [Impact]
+ 
+  * Libvirt (and other management software on top of qemu/kvm) probes
+    capabilities of the current platform, this breaks on arm with the 
+    current builds making it unable to use KVM on this platform through the 
+    management stack.
+ 
+  * The fix ensures that probing with -machine none won't break on 
+    platforms with different -cpu support (differs per platform)
+ 
+ [Test Case]
+ 
+  * We will run the regression tests to cover any implications to !arm
+  * The openstack Team will re-run their tests that uncovered the issue to 
+    confirm that execution on arm is not affected by the bug anymore (nor 
+    showing new issues).
+ 
+ [Regression Potential]
+ 
+  * The fix only affects "-machine none" cases which are sort of exclusive 
+    for probing which was formerly broken. Therefore there should not be 
+    any regressions, but if any then on non-arm machines in rgard to that 
+    probing.
+    Any reboot of a machine with libvirt re-probing capabilities would 
+    reveal that - so we should be safe after testing is ok.
+ 
+ [Other Info]
+  
+  * n/a
+ 
+ ---
+ 
  bionic ussuri - arm64 (aarch64)
  
  QEMU emulator version 4.2.0 (Debian 1:4.2-3ubuntu6.3~cloud0)
  
  Error in log is: nova.exception.InternalError: Nova requires QEMU
  version 2.11.0 or greater
  
  This error may be a red herring as this particular version of nova does
  not display capabilities for aarch64, only armv6l
  
  https://pastebin.ubuntu.com/p/JmPsDSwHBv/
  
  If I downgrade to the version in the train cloud-archive (1:4.0+dfsg-
  0ubuntu9.8~cloud0) then nova-compute service starts - this problem is
  not present in focal, which also has version also has 1:4.2-3ubuntu6.3

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https://bugs.launchpad.net/bugs/1891203

Title:
  arm64 - services not running that should be - missing capabilities

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