pmu test from ubuntu_kvm_unit_tests failed with N-6.8 openstack

[Po-Hsu Lin]

Issue found on openstack AMD64 with Noble OEM 6.8.0-1006.6

This issue is hardware specific, sometime it will pass on the openstack AMD64 VM because the hardware is different.

With a newer kernel the behaviour is a bit different than bug 2002643, failed sub-tests are:
 FAIL: AMD: instructions-5
 FAIL: AMD: all counters
 FAIL: AMD: overflow: cntr-0
 FAIL: AMD: overflow: cntr-1
 FAIL: AMD: overflow: cntr-2
 FAIL: AMD: overflow: cntr-3
 FAIL: AMD: overflow: cntr-4
 FAIL: AMD: overflow: cntr-5
 FAIL: AMD: K7: overflow: cntr-0
 FAIL: AMD: K7: overflow: cntr-1
 FAIL: AMD: K7: overflow: cntr-2
 FAIL: AMD: K7: overflow: cntr-3
 FAIL pmu (77 tests, 12 unexpected failures, 10 skipped)

Test log:
 Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/pmu'
 BUILD_HEAD=b04954c9
 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.cDwMu5PlTd -smp 1 -cpu max # -initrd /tmp/tmp.FiwIUBEb7A
 enabling apic
 smp: waiting for 0 APs
 paging enabled
 cr0 = 80010011
 cr3 = 1007000
 cr4 = 20
 PASS: Expected #GP on RDPMC(64)
 PMU version: 0
 GP counters: 6
 GP counter width: 48
 Mask length: 6
 Fixed counters: 0
 Fixed counter width: 0
 PASS: AMD: core cycles-0
 PASS: AMD: core cycles-1
 PASS: AMD: core cycles-2
 PASS: AMD: core cycles-3
 PASS: AMD: core cycles-4
 PASS: AMD: core cycles-5
 PASS: AMD: instructions-0
 PASS: AMD: instructions-1
 PASS: AMD: instructions-2
 PASS: AMD: instructions-3
 PASS: AMD: instructions-4
 FAIL: AMD: instructions-5
 PASS: AMD: branches-0
 PASS: AMD: branches-1
 PASS: AMD: branches-2
 PASS: AMD: branches-3
 PASS: AMD: branches-4
 PASS: AMD: branches-5
 PASS: AMD: branch misses-0
 PASS: AMD: branch misses-1
 PASS: AMD: branch misses-2
 PASS: AMD: branch misses-3
 PASS: AMD: branch misses-4
 PASS: AMD: branch misses-5
 PASS: AMD: rdpmc: cntr-0
 SKIP: AMD: rdpmc: fast-0
 PASS: AMD: rdpmc: cntr-1
 SKIP: AMD: rdpmc: fast-1
 PASS: AMD: rdpmc: cntr-2
 SKIP: AMD: rdpmc: fast-2
 PASS: AMD: rdpmc: cntr-3
 SKIP: AMD: rdpmc: fast-3
 PASS: AMD: rdpmc: cntr-4
 SKIP: AMD: rdpmc: fast-4
 PASS: AMD: rdpmc: cntr-5
 SKIP: AMD: rdpmc: fast-5
 FAIL: AMD: all counters
 FAIL: AMD: overflow: cntr-0
 FAIL: AMD: overflow: cntr-1
 FAIL: AMD: overflow: cntr-2
 FAIL: AMD: overflow: cntr-3
 FAIL: AMD: overflow: cntr-4
 FAIL: AMD: overflow: cntr-5
 PASS: AMD: cmask
 PASS: AMD: running counter wrmsr: cntr
 PASS: AMD: K7: core cycles-0
 PASS: AMD: K7: core cycles-1
 PASS: AMD: K7: core cycles-2
 PASS: AMD: K7: core cycles-3
 PASS: AMD: K7: instructions-0
 PASS: AMD: K7: instructions-1
 PASS: AMD: K7: instructions-2
 PASS: AMD: K7: instructions-3
 PASS: AMD: K7: branches-0
 PASS: AMD: K7: branches-1
 PASS: AMD: K7: branches-2
 PASS: AMD: K7: branches-3
 PASS: AMD: K7: branch misses-0
 PASS: AMD: K7: branch misses-1
 PASS: AMD: K7: branch misses-2
 PASS: AMD: K7: branch misses-3
 PASS: AMD: K7: rdpmc: cntr-0
 SKIP: AMD: K7: rdpmc: fast-0
 PASS: AMD: K7: rdpmc: cntr-1
 SKIP: AMD: K7: rdpmc: fast-1
 PASS: AMD: K7: rdpmc: cntr-2
 SKIP: AMD: K7: rdpmc: fast-2
 PASS: AMD: K7: rdpmc: cntr-3
 SKIP: AMD: K7: rdpmc: fast-3
 PASS: AMD: K7: all counters
 FAIL: AMD: K7: overflow: cntr-0
 FAIL: AMD: K7: overflow: cntr-1
 FAIL: AMD: K7: overflow: cntr-2
 FAIL: AMD: K7: overflow: cntr-3
 PASS: AMD: K7: cmask
 PASS: AMD: K7: running counter wrmsr: cntr
 SUMMARY: 77 tests, 12 unexpected failures, 10 skipped
 FAIL pmu (77 tests, 12 unexpected failures, 10 skipped)