pmu in ubuntu_kvm_unit_tests failed on K-oracle

[Po-Hsu Lin]

Open a new bug as it's failing differently than bug 1853797

Issue found on K-oracle-5.19.0-1008.8, with instance VM.DenseIO2.8 and VM.Standard2.1 only

One sub test failed with "FAIL: all counters", and terminates with "Unhandled exception 13 #GP at ip 00000000004014b2" eventually. (Otherwise we should see a statistic in the end)

Test log:
Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/pmu'
 BUILD_HEAD=d6421940
 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.LTG8ocvzKB -smp 1 -cpu max # -initrd /tmp/tmp.OziYPxAsvW
 enabling apic
 smp: waiting for 0 APs
 paging enabled
 cr0 = 80010011
 cr3 = 1007000
 cr4 = 20
 PMU version: 2
 GP counters: 4
 GP counter width: 48
 Mask length: 7
 Fixed counters: 3
 Fixed counter width: 48
 PASS: core cycles-0
 PASS: core cycles-1
 PASS: core cycles-2
 PASS: core cycles-3
 PASS: instructions-0
 PASS: instructions-1
 PASS: instructions-2
 PASS: instructions-3
 PASS: ref cycles-0
 PASS: ref cycles-1
 PASS: ref cycles-2
 PASS: ref cycles-3
 PASS: llc references-0
 PASS: llc references-1
 PASS: llc references-2
 PASS: llc references-3
 PASS: llc misses-0
 PASS: llc misses-1
 PASS: llc misses-2
 PASS: llc misses-3
 PASS: branches-0
 PASS: branches-1
 PASS: branches-2
 PASS: branches-3
 PASS: branch misses-0
 PASS: branch misses-1
 PASS: branch misses-2
 PASS: branch misses-3
 PASS: fixed-0
 PASS: fixed-1
 PASS: fixed-2
 PASS: rdpmc: cntr-0
 PASS: rdpmc: fast-0
 PASS: rdpmc: cntr-1
 PASS: rdpmc: fast-1
 PASS: rdpmc: cntr-2
 PASS: rdpmc: fast-2
 PASS: rdpmc: cntr-3
 PASS: rdpmc: fast-3
 PASS: rdpmc: fixed cntr-0
 PASS: rdpmc: fixed fast-0
 PASS: rdpmc: fixed cntr-1
 PASS: rdpmc: fixed fast-1
 PASS: rdpmc: fixed cntr-2
 PASS: rdpmc: fixed fast-2
 FAIL: all counters
 PASS: overflow: cntr-0
 PASS: overflow: status-0
 PASS: overflow: status clear-0
 PASS: overflow: irq-0
 PASS: overflow: cntr-1
 PASS: overflow: status-1
 PASS: overflow: status clear-1
 PASS: overflow: irq-1
 PASS: overflow: cntr-2
 PASS: overflow: status-2
 PASS: overflow: status clear-2
 PASS: overflow: irq-2
 PASS: overflow: cntr-3
 PASS: overflow: status-3
 PASS: overflow: status clear-3
 PASS: overflow: irq-3
 PASS: overflow: cntr-4
 PASS: overflow: status-4
 PASS: overflow: status clear-4
 PASS: overflow: irq-4
 PASS: cmask
 PASS: running counter wrmsr: cntr
 PASS: running counter wrmsr: status
 Unhandled exception 13 #GP at ip 00000000004014b2
 error_code=0000 rflags=00010002 cs=00000008
 rax=0000000000514375 rcx=0000000000000345 rdx=0000000000514360 rbx=0000000015dd7834
 rbp=00000000005135a0 rsi=0000000000411b52 rdi=0000000000514375
  r8=0000000000000020 r9=00000000000003f8 r10=000000000000000d r11=000000000000000a
 r12=000000001901a6a0 r13=00000000e34ff472 r14=0000000000000000 r15=0000000000000000
 cr0=0000000080010011 cr2=0000000000000000 cr3=0000000001007000 cr4=0000000000000020
 cr8=0000000000000000
  STACK: @4014b2 400227
 FAIL pmu