When comparing the Focal 5.4 generic AMD64 kernel test output and Focal 5.4 KVM AMD64 kernel test output, you can see the generic kernel will pass with:
PASS: clflush (present) PASS: sfence (present) PASS: lfence (present) PASS: mfence (present) PASS: clflushopt (ABSENT) PASS: clwb (ABSENT) PASS: invalid clwb PASS: pcommit (ABSENT) SUMMARY: 8 tests PASS memory (8 tests) Instead the KVM kernel will fail with: FAIL: clflushopt (ABSENT) FAIL: clwb (ABSENT) I wonder what's the difference here. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oracle in Ubuntu. https://bugs.launchpad.net/bugs/1831449 Title: memory in ubuntu_kvm_unit_tests fails (clflushopt / clwb ABSENT) Status in ubuntu-kernel-tests: Triaged Status in linux-kvm package in Ubuntu: Confirmed Status in linux-oracle package in Ubuntu: Confirmed Bug description: FAIL: clflushopt (ABSENT) FAIL: clwb (ABSENT) Test output: Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/memory' BUILD_HEAD=32db322d timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 --no-reboot -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.SOyUkPCNxP -smp 1 -cpu max # -initrd /tmp/tmp.DiAWwvk2jC enabling apic PASS: clflush (present) PASS: sfence (present) PASS: lfence (present) PASS: mfence (present) FAIL: clflushopt (ABSENT) FAIL: clwb (ABSENT) PASS: invalid clwb PASS: pcommit (ABSENT) SUMMARY: 8 tests, 2 unexpected failures FAIL memory (8 tests, 2 unexpected failures) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1831449/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
