** Tags added: kvm sru-20210412

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https://bugs.launchpad.net/bugs/1845687

Title:
  memory test in ubuntu_kvm_unit tests fails Xenial linux-kvm

Status in ubuntu-kernel-tests:
  Triaged
Status in linux-kvm package in Ubuntu:
  New
Status in linux-kvm source package in Xenial:
  New
Status in linux-kvm source package in Eoan:
  Won't Fix

Bug description:
  Series: Xenial
  Kernel: 4.4.0-1059.66 linux-kvm

  specifically clfushopt and clwb

  09/23 08:43:08 DEBUG|     utils:0116| Running 'kvm-ok'
  09/23 08:43:08 DEBUG|     utils:0153| [stdout] INFO: /dev/kvm exists
  09/23 08:43:08 DEBUG|     utils:0153| [stdout] KVM acceleration can be used
  09/23 08:43:08 DEBUG|     utils:0116| Running 
'/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/memory'
  09/23 08:43:08 DEBUG|     utils:0153| [stdout] BUILD_HEAD=e2c275c4
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] timeout -k 1s --foreground 90s 
/usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device 
isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device 
pci-testdev -machine accel=kvm -kernel /tmp/tmp.HnxXwZrpQ9 -smp 1 -cpu host # 
-initrd /tmp/tmp.SL7FtNHKpq
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] enabling apic
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] PASS: clflush (present)
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] PASS: sfence (present)
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] PASS: lfence (present)
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] PASS: mfence (present)
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] FAIL: clflushopt (ABSENT)
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] FAIL: clwb (ABSENT)
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] PASS: invalid clwb
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] PASS: pcommit (ABSENT)
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] SUMMARY: 8 tests, 2 unexpected 
failures
  09/23 08:43:09 DEBUG|     utils:0153| [stdout] FAIL memory (8 tests, 2 
unexpected failures)

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