5.0.0-rc3 : Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries

[Dennis Clarke]

Very strange messages from qemu 5.0.0-rc3 wherein I try to run :

$ /usr/local/bin/qemu-system-ppc64 --version
QEMU emulator version 4.2.93
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
$
$
$ /usr/local/bin/qemu-system-ppc64 \
> -machine pseries-4.1 -cpu power9 -smp 4 -m 12G -accel tcg \
> -drive file=/home/ppc64/ppc64le.qcow2 \
> -device virtio-net-pci,netdev=usernet \
> -netdev user,id=usernet,hostfwd=tcp::10000-:22 \
> -serial stdio -display none -vga none
qemu-system-ppc64: warning: TCG doesn't support requested feature, 
cap-cfpc=workaround
qemu-system-ppc64: warning: TCG doesn't support requested feature, 
cap-sbbc=workaround
qemu-system-ppc64: warning: TCG doesn't support requested feature, 
cap-ibs=workaround


SLOF **********************************************************************
QEMU Starting
 Build Date = Mar 27 2020 13:57:26
 FW Version = git-8e012d6fddb62be8
 Press "s" to enter Open Firmware.

C0240
Populating /vdevice methods
Populating /vdevice/vty@71000000
Populating /vdevice/nvram@71000001
Populating /vdevice/v-scsi@71000002
       SCSI: Looking for devices
          8000000000000000 DISK     : "QEMU     QEMU HARDDISK    2.5+"
          8200000000000000 CD-ROM   : "QEMU     QEMU CD-ROM      2.5+"
C05A0
No NVRAM common partition, re-initializing...
Scanning USB
Using default console: /vdevice/vty@71000000

  Welcome to Open Firmware

  Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
  This program and the accompanying materials are made available
  under the terms of the BSD License available at
  http://www.opensource.org/licenses/bsd-license.php


Trying to load:  from: /vdevice/v-scsi@71000002/disk@8000000000000000 
...   Successfully loaded
Welcome to GRUB!
.
.
.
etc
etc

Populating /vdevice methods
Populating /vdevice/vty@71000000
Populating /vdevice/nvram@71000001
Loading Linux 5.5.0-1-powerpc64le ...
Loading initial ramdisk ...
OF stdout device is: /vdevice/vty@71000000
Preparing to boot Linux version 5.5.0-1-powerpc64le 
(address@hidden) (gcc version 9.3.0 (Debian 9.3.0-8)) #1 
SMP Debian 5.5.13-2 (2020-03-30)
Detected machine type: 0000000000000101
command line: BOOT_IMAGE=/boot/vmlinux-5.5.0-1-powerpc64le 
root=UUID=349c875e-f9c9-4fdd-9023-7f4a11bdd6c6 ro verbose
Max number of cores passed to firmware: 2048 (NR_CPUS = 2048)
Calling ibm,client-architecture-support... done
memory layout at init:
  memory_limit : 0000000000000000 (16 MB aligned)
  alloc_bottom : 0000000005180000
  alloc_top    : 0000000030000000
  alloc_top_hi : 0000000300000000
  rmo_top      : 0000000030000000
  ram_top      : 0000000300000000
instantiating rtas at 0x000000002fff0000... done
prom_hold_cpus: skipped
copying OF device tree...
Building dt strings...
Building dt structure...
Device tree strings 0x0000000005190000 -> 0x0000000005190b3e
Device tree struct  0x00000000051a0000 -> 0x00000000051b0000
Quiescing Open Firmware ...
Booting Linux via __start() @ 0x0000000002000000 ...
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
[    0.000000] radix-mmu: Page sizes from device-tree:
[    0.000000] radix-mmu: Page size shift = 12 AP=0x0
[    0.000000] radix-mmu: Page size shift = 16 AP=0x5
[    0.000000] radix-mmu: Page size shift = 21 AP=0x1
[    0.000000] radix-mmu: Page size shift = 30 AP=0x2
[    0.000000] radix-mmu: Activating Kernel Userspace Execution Prevention
[    0.000000] radix-mmu: Activating Kernel Userspace Access Prevention
[    0.000000] radix-mmu: Mapped 0x0000000000000000-0x0000000040000000 
with 1.00 GiB pages (exec)
[    0.000000] radix-mmu: Mapped 0x0000000040000000-0x0000000300000000 
with 1.00 GiB pages
[    0.000000] lpar: Using radix MMU under hypervisor
[    0.000000] Linux version 5.5.0-1-powerpc64le 
(address@hidden) (gcc version 9.3.0 (Debian 9.3.0-8)) #1 
SMP Debian 5.5.13-2 (2020-03-30)
[    0.000000] Found initrd at 0xc000000003700000:0xc0000000051783ed
[    0.000000] Using pSeries machine description
[    0.000000] printk: bootconsole [udbg0] enabled
[    0.000000] Partition configured for 4 cpus.
[    0.000000] CPU maps initialized for 1 thread per core
[    0.000000] -----------------------------------------------------
[    0.000000] phys_mem_size     = 0x300000000
[    0.000000] dcache_bsize      = 0x80
[    0.000000] icache_bsize      = 0x80
[    0.000000] cpu_features      = 0x0001c06f8f4f91a7
[    0.000000]   possible        = 0x0001fbefcf5fb1a7
[    0.000000]   always          = 0x00000003800081a1
[    0.000000] cpu_user_features = 0xdc0065c2 0xaee00000
[    0.000000] mmu_features      = 0xbc006041
[    0.000000] firmware_features = 0x00000005455a445f
[    0.000000] vmalloc start     = 0xc008000000000000
[    0.000000] IO start          = 0xc00a000000000000
[    0.000000] vmemmap start     = 0xc00c000000000000
[    0.000000] -----------------------------------------------------
[    0.000000] numa:   NODE_DATA [mem 0x2fffcaf80-0x2fffcffff]
[    0.000000] rfi-flush: fallback displacement flush available
[    0.000000] rfi-flush: ori type flush available
[    0.000000] rfi-flush: mttrig type flush available
[    0.000000] link-stack-flush: software flush enabled.
[    0.000000] count-cache-flush: full software flush sequence enabled.
[    0.000000] stf-barrier: eieio barrier available
[    0.000000] PCI host bridge /pci@800000020000000  ranges:
[    0.000000]   IO 0x0000200000000000..0x000020000000ffff -> 
0x0000000000000000
[    0.000000]  MEM 0x0000200080000000..0x00002000ffffffff -> 
0x0000000080000000
[    0.000000]  MEM 0x0000210000000000..0x000021ffffffffff -> 
0x0000210000000000
[    0.000000] PPC64 nvram contains 65536 bytes
[    0.000000] barrier-nospec: using ORI speculation barrier
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x00000002ffffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x00000002ffffffff]
[    0.000000] Initmem setup node 0 [mem 
0x0000000000000000-0x00000002ffffffff]
[    0.000000] percpu: Embedded 11 pages/cpu s632472 r0 d88424 u720896
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 196416
[    0.000000] Policy zone: Normal
[    0.000000] Kernel command line: 
BOOT_IMAGE=/boot/vmlinux-5.5.0-1-powerpc64le 
root=UUID=349c875e-f9c9-4fdd-9023-7f4a11bdd6c6 ro verbose
[    0.000000] Dentry cache hash table entries: 2097152 (order: 8, 
16777216 bytes, linear)
[    0.000000] Inode-cache hash table entries: 1048576 (order: 7, 
8388608 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 12418688K/12582912K available (11264K kernel 
code, 1600K rwdata, 2624K rodata, 4736K init, 1352K bss, 164224K 
reserved, 0K cma-reserved)
[    0.000000] random: get_random_u64 called from 
__kmem_cache_create+0x58/0x740 with crng_init=0
[    0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] ftrace: allocating 28675 entries in 11 pages
[    0.000000] ftrace: allocated 11 pages with 3 groups
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=2048 to 
nr_cpu_ids=4.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay 
is 25 jiffies.
[    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
[    0.000000] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
[    0.000000] xive: Using IRQ range [0-1f]
[    0.000000] xive: Interrupt handling initialized with spapr backend
[    0.000000] xive: Using priority 6 for all interrupts
[    0.000000] xive: Using 64kB queues
[    0.000525] time_init: 56 bit decrementer (max: 7fffffffffffff)
[    0.002726] clocksource: timebase: mask: 0xffffffffffffffff 
max_cycles: 0x761537d007, max_idle_ns: 440795202126 ns
[    0.004710] clocksource: timebase mult[1f40000] shift[24] registered
[    0.090358] Console: colour dummy device 80x25
[    0.094701] printk: console [hvc0] enabled
[    0.094701] printk: console [hvc0] enabled
[    0.099729] printk: bootconsole [udbg0] disabled
[    0.099729] printk: bootconsole [udbg0] disabled
[    0.112865] pid_max: default: 32768 minimum: 301
[    0.119961] LSM: Security Framework initializing
[    0.127988] Yama: disabled by default; enable with sysctl kernel.yama.*
[    0.148839] AppArmor: AppArmor initialized
[    0.149375] TOMOYO Linux initialized
[    0.158678] Mount-cache hash table entries: 32768 (order: 2, 262144 
bytes, linear)
[    0.159197] Mountpoint-cache hash table entries: 32768 (order: 2, 
262144 bytes, linear)
[    0.483616] EEH: pSeries platform initialized
[    0.488261] POWER9 performance monitor hardware support registered
[    0.496769] rcu: Hierarchical SRCU implementation.
[    0.558027] smp: Bringing up secondary CPUs ...
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
[    0.738980] smp: Brought up 1 node, 4 CPUs
[    0.747706] numa: Node 0 CPUs: 0-3
[    0.749018] Using standard scheduler topology
[    0.905423] devtmpfs: initialized
[    1.816384] clocksource: jiffies: mask: 0xffffffff max_cycles: 
0xffffffff, max_idle_ns: 7645041785100000 ns
[    1.817309] futex hash table entries: 1024 (order: 1, 131072 bytes, 
linear)
[    1.857065] thermal_sys: Registered thermal governor 'fair_share'
[    1.857921] thermal_sys: Registered thermal governor 'step_wise'
[    1.895866] NET: Registered protocol family 16
[    1.924385] audit: initializing netlink subsys (disabled)
[    1.938267] audit: type=2000 audit(1587083800.680:1): 
state=initialized audit_enabled=0 res=1
[    1.956212] cpuidle: using governor ladder
[    1.957459] cpuidle: using governor menu
Linux ppc64le
#1 SMP Debian 5.[    2.727145] PCI: Probing PCI hardware
[    2.780671] PCI host bridge to bus 0000:00
[    2.787552] pci_bus 0000:00: root bus resource [io  0x10000-0x1ffff] 
(bus address [0x0000-0xffff])
[    2.788360] pci_bus 0000:00: root bus resource [mem 
0x200080000000-0x2000ffffffff] (bus address [0x80000000-0xffffffff])
[    2.788571] pci_bus 0000:00: root bus resource [mem 
0x210000000000-0x21ffffffffff]
[    2.790515] pci_bus 0000:00: root bus resource [bus 00-ff]
[    2.808505] pci 0000:00:00.0: No hypervisor support for SR-IOV on 
this device, IOV BARs disabled.
[    2.854092] IOMMU table initialized, virtual merging enabled
[    2.860422] pci 0000:00:00.0: Adding to iommu group 0
[    2.903913] EEH: No capable adapters found: recovery disabled.
[    3.079477] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[    3.079713] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[    4.461384] iommu: Default domain type: Translated
[    4.488421] vgaarb: loaded
[    4.501689] SCSI subsystem initialized
[    4.618325] clocksource: Switched to clocksource timebase
[    5.150313] VFS: Disk quotas dquot_6.6.0
[    5.152315] VFS: Dquot-cache hash table entries: 8192 (order 0, 65536 
bytes)
[    5.198533] AppArmor: AppArmor Filesystem Enabled
[    5.338112] NET: Registered protocol family 2
[    5.385420] tcp_listen_portaddr_hash hash table entries: 8192 (order: 
1, 131072 bytes, linear)
[    5.386926] TCP established hash table entries: 131072 (order: 4, 
1048576 bytes, linear)
[    5.390389] TCP bind hash table entries: 65536 (order: 4, 1048576 
bytes, linear)
[    5.393419] TCP: Hash tables configured (established 131072 bind 65536)
[    5.403808] UDP hash table entries: 8192 (order: 2, 262144 bytes, linear)
[    5.405660] UDP-Lite hash table entries: 8192 (order: 2, 262144 
bytes, linear)
[    5.421035] NET: Registered protocol family 1
[    5.423887] NET: Registered protocol family 44
[    5.425650] PCI: CLS 0 bytes, default 128
[    5.458087] Trying to unpack rootfs image as initramfs...
[    6.231873] random: fast init done
[    9.616205] Freeing initrd memory: 27072K
[    9.703593] Initialise system trusted keyrings
[    9.718828] Key type blacklist registered
[    9.723737] workingset: timestamp_bits=38 max_order=18 bucket_order=0
[    9.763905] zbud: loaded
[    9.788372] Platform Keyring initialized
[    9.788839] Key type asymmetric registered
[    9.789479] Asymmetric key parser 'x509' registered
[    9.791146] Block layer SCSI generic (bsg) driver version 0.4 loaded 
(major 252)
[    9.795462] io scheduler mq-deadline registered
[    9.856723] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    9.894938] Non-volatile memory driver v1.3
[    9.895272] Linux agpgart interface v0.103
[    9.919065] mousedev: PS/2 mouse device common for all mice
[    9.932806] rtc-generic rtc-generic: registered as rtc0
[    9.956046] ledtrig-cpu: registered to indicate activity on CPUs
[    9.958099] drop_monitor: Initializing network drop monitor service
[    9.989419] NET: Registered protocol family 10
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
[   12.850737] Segment Routing with IPv6
[   12.885129] mip6: Mobile IPv6
[   12.887781] NET: Registered protocol family 17
[   12.909432] mpls_gso: MPLS GSO support
[   12.918382] drmem: No dynamic reconfiguration memory found
[   13.069665] registered taskstats version 1
[   13.070319] Loading compiled-in X.509 certificates
[   13.854520] Loaded X.509 cert 'Debian Secure Boot CA: 
6ccece7e4c6c0d1f6149f3dd27dfcc5cbb419ea1'
[   13.857411] Loaded X.509 cert 'Debian Secure Boot Signer: 00a7468def'
[   13.876826] zswap: loaded using pool lzo/zbud
[   13.892945] Key type ._fscrypt registered
[   13.893252] Key type .fscrypt registered
[   13.902473] AppArmor: AppArmor sha1 policy hashing enabled
[   13.941327] rtc-generic rtc-generic: setting system clock to 
2020-04-17T00:36:53 UTC (1587083813)
[   14.228844] Freeing unused kernel memory: 4736K
[   14.229208] This architecture does not have kernel memory protection.
[   14.230822] Run /init as init process
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Loading, please wait...
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Starting version 245.4-4
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
Opcode 1f 12 0f 00 (7c6003e4) leaked temporaries
[   22.500375] virtio: module verification failed: signature and/or 
required key missing - tainting kernel
[   22.715435] virtio-pci 0000:00:00.0: enabling device (0100 -> 0103)
[   22.731815] virtio-pci 0000:00:00.0: ibm,query-pe-dma-windows(2026) 0 
8000000 20000000 returned 0
[   22.743739] virtio-pci 0000:00:00.0: ibm,create-pe-dma-window(2027) 0 
8000000 20000000 10 22 returned 0 (liobn = 0x80000001 starting addr = 
8000000 0)
[   22.823732] synth uevent: /devices/vio: failed to send uevent
[   22.824210] vio vio: uevent: failed to send synthetic uevent
[   24.314881] ibmvscsi 71000002: SRP_VERSION: 16.a
[   24.319685] ibmvscsi 71000002: Maximum ID: 64 Maximum LUN: 32 Maximum 
Channel: 3
[   24.320311] scsi host0: IBM POWER Virtual SCSI Adapter 1.5.9
[   24.430089] ibmvscsi 71000002: partner initialization complete
[   24.433769] ibmvscsi 71000002: host srp version: 16.a, host partition 
qemu (0), OS 2, max io 2097152
[   24.435087] ibmvscsi 71000002: sent SRP login
[   24.436436] ibmvscsi 71000002: SRP_LOGIN succeeded
[   24.547986] scsi 0:0:0:0: Direct-Access     QEMU     QEMU HARDDISK 
2.5+ PQ: 0 ANSI: 5
[   24.647821] scsi 0:0:2:0: CD-ROM            QEMU     QEMU CD-ROM 
2.5+ PQ: 0 ANSI: 5
[   24.674478] virtio_net virtio0 enp0s0: renamed from eth0
[   25.780025] sd 0:0:0:0: [sda] 134217728 512-byte logical blocks: 
(68.7 GB/64.0 GiB)
[   25.783520] sd 0:0:0:0: [sda] Write Protect is off
[   25.787620] sd 0:0:0:0: [sda] Write cache: enabled, read cache: 
enabled, doesn't support DPO or FUA
[   25.920212]  sda: sda1 sda2 sda3
[   25.981505] sd 0:0:0:0: [sda] Attached SCSI disk
[   25.987134] sr 0:0:2:0: Power-on or device reset occurred
[   25.996980] sr 0:0:2:0: [sr0] scsi3-mmc drive: 16x/50x cd/rw xa/form2 
cdda tray
[   25.999657] cdrom: Uniform CD-ROM driver Revision: 3.20
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top 
... done.
Begin: Running /scripts/local-premount ... done.
Begin: Will now check root file system ... fsck from util-linux 2.34
[/sbin/fsck.ext4 (1) -- /dev/sda2] fsck.ext4 -a -C0 /dev/sda2
/dev/sda2: clean, 37500/3432448 files, 709209/13712640 blocks
done.
[   31.363068] random: crng init done
[   31.513355] EXT4-fs (sda2): mounted filesystem with ordered data 
mode. Opts: (null)
done.
Begin: Running /scripts/local-bottom ... done.
Begin: Running /scripts/init-bottom ... done.
[   34.754019] Not activating Mandatory Access Control as 
/sbin/tomoyo-init does not exist.
[   36.014739] systemd[1]: Inserted module 'autofs4'
[   36.526153] systemd[1]: systemd 245.4-4 running in system mode. (+PAM 
+AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP 
+GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN 
+PCRE2 default-hierarchy=hybrid)
[   36.540558] systemd[1]: Detected architecture ppc64-le.

Welcome to Debian GNU/Linux bullseye/sid!

[   37.143996] systemd[1]: Set hostname to <titan>.
[   41.742740] systemd[1]: /lib/systemd/system/dbus.socket:5: 
ListenStream= references a path below legacy directory /var/run/, 
updating /var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; 
please update the unit file accordingly.
[   42.467335] systemd[1]: Created slice system-getty.slice.
[  OK  ] Created slice system-getty.slice.
[   42.492126] systemd[1]: Created slice system-modprobe.slice.
[  OK  ] Created slice system-modprobe.slice.
[   42.502642] systemd[1]: Created slice system-serial\x2dgetty.slice.
[  OK  ] Created slice system-serial\x2dgetty.slice.
[   42.516066] systemd[1]: Created slice User and Session Slice.
[  OK  ] Created slice User and Session Slice.
[   42.531499] systemd[1]: Started Dispatch Password Requests to Console 
Directory Watch.
[  OK  ] Started Dispatch Password …ts to Console Directory Watch.
[   42.545482] systemd[1]: Started Forward Password Requests to Wall 
Directory Watch.
[  OK  ] Started Forward Password R…uests to Wall Directory Watch.
[   42.613352] systemd[1]: Set up automount Arbitrary Executable File 
Formats File System Automount Point.
[  OK  ] Set up automount Arbitrary…s File System Automount Point.
[   42.623744] systemd[1]: Reached target Local Encrypted Volumes.
[  OK  ] Reached target Local Encrypted Volumes.
[   42.626871] systemd[1]: Reached target Paths.
[  OK  ] Reached target Paths.
[   42.629147] systemd[1]: Reached target Remote File Systems.
[  OK  ] Reached target Remote File Systems.
[   42.631513] systemd[1]: Reached target Slices.
[  OK  ] Reached target Slices.
[   42.655650] systemd[1]: Listening on Syslog Socket.
[  OK  ] Listening on Syslog Socket.
[   42.662459] systemd[1]: Listening on fsck to fsckd communication Socket.
[  OK  ] Listening on fsck to fsckd communication Socket.
[   42.671083] systemd[1]: Listening on initctl Compatibility Named Pipe.
[  OK  ] Listening on initctl Compatibility Named Pipe.
[   42.724709] systemd[1]: Listening on Journal Audit Socket.
[  OK  ] Listening on Journal Audit Socket.
[   42.731117] systemd[1]: Listening on Journal Socket (/dev/log).
[  OK  ] Listening on Journal Socket (/dev/log).
[   42.737526] systemd[1]: Listening on Journal Socket.
[  OK  ] Listening on Journal Socket.
[   42.744915] systemd[1]: Listening on udev Control Socket.
[  OK  ] Listening on udev Control Socket.
[   42.750322] systemd[1]: Listening on udev Kernel Socket.
[  OK  ] Listening on udev Kernel Socket.
[   42.845052] systemd[1]: Mounting Huge Pages File System...
         Mounting Huge Pages File System...
[   42.895230] systemd[1]: Mounting POSIX Message Queue File System...
         Mounting POSIX Message Queue File System...
[   42.941071] systemd[1]: Mounting Kernel Debug File System...
         Mounting Kernel Debug File System...
[   42.992594] systemd[1]: Mounting Kernel Trace File System...
         Mounting Kernel Trace File System...
[   43.124098] systemd[1]: Starting Set the console keyboard layout...
         Starting Set the console keyboard layout...
[   43.259549] systemd[1]: Starting Create list of static device nodes 
for the current kernel...
         Starting Create list of st…odes for the current kernel...
[   43.377450] systemd[1]: Starting Load Kernel Module drm...
         Starting Load Kernel Module drm...
[   43.430149] systemd[1]: Condition check resulted in Set Up Additional 
Binary Formats being skipped.
[   43.433333] systemd[1]: Condition check resulted in File System Check 
on Root Device being skipped.
[   43.566369] systemd[1]: Starting Journal Service...
         Starting Journal Service...
[   43.755792] systemd[1]: Starting Load Kernel Modules...
         Starting Load Kernel Modules...
[   43.881133] systemd[1]: Starting Remount Root and Kernel File Systems...
         Starting Remount Root and Kernel File Systems...
[   43.951638] systemd[1]: Starting udev Coldplug all Devices...
         Starting udev Coldplug all Devices...
[   44.044430] systemd[1]: Mounted Huge Pages File System.
[  OK  ] Mounted Huge Pages File System.
[   44.054156] systemd[1]: Mounted POSIX Message Queue File System.
[  OK  ] Mounted POSIX Message Queue File System.
[   44.060983] systemd[1]: Mounted Kernel Debug File System.
[  OK  ] Mounted Kernel Debug File System.
[   44.067699] systemd[1]: Mounted Kernel Trace File System.
[  OK  ] Mounted Kernel Trace File System.
[   44.112254] systemd[1]: Finished Create list of static device nodes 
for the current kernel.
[  OK  ] Finished Create list of st… nodes for the current kernel.
[   45.392183] systemd[1]: Finished Load Kernel Modules.
[  OK  ] Finished Load Kernel Modules.
[   45.404817] systemd[1]: Condition check resulted in FUSE Control File 
System being skipped.
[   45.407500] systemd[1]: Condition check resulted in Kernel 
Configuration File System being skipped.
[   45.493293] systemd[1]: Starting Apply Kernel Variables...
         Starting Apply Kernel Variables...
[   45.574298] systemd[1]: modprobe@drm.service: Succeeded.
[   45.597987] systemd[1]: Finished Load Kernel Module drm.
[  OK  ] Finished Load Kernel Module drm.
[   46.210142] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro
[   46.313004] systemd[1]: Finished Apply Kernel Variables.
[  OK  ] Finished Apply Kernel Variables.
[   46.340589] systemd[1]: Finished Remount Root and Kernel File Systems.
[  OK  ] Finished Remount Root and Kernel File Systems.
[   46.369395] systemd[1]: Condition check resulted in Rebuild Hardware 
Database being skipped.
[   46.370513] systemd[1]: Condition check resulted in Platform 
Persistent Storage Archival being skipped.
[   46.426639] systemd[1]: Starting Load/Save Random Seed...
         Starting Load/Save Random Seed...
[   46.541735] systemd[1]: Starting Create System Users...
         Starting Create System Users...
[   47.493353] systemd[1]: Finished Load/Save Random Seed.
[  OK  ] Finished Load/Save Random Seed.
[   47.891603] systemd[1]: Finished Create System Users.
[  OK  ] Finished Create System Users.
[   48.015581] systemd[1]: Starting Create Static Device Nodes in /dev...
         Starting Create Static Device Nodes in /dev...
[   49.011121] systemd[1]: Finished Set the console keyboard layout.
[  OK  ] Finished Set the console keyboard layout.
[   49.042222] systemd[1]: Finished Create Static Device Nodes in /dev.
[  OK  ] Finished Create Static Device Nodes in /dev.
[   49.048555] systemd[1]: Reached target Local File Systems (Pre).
[  OK  ] Reached target Local File Systems (Pre).
[   49.051241] systemd[1]: Reached target Local File Systems.
[  OK  ] Reached target Local File Systems.
[   49.106095] systemd[1]: Starting Load AppArmor profiles...
         Starting Load AppArmor profiles...
[   49.163506] systemd[1]: Starting Set console font and keymap...
         Starting Set console font and keymap...
[   49.170472] systemd[1]: Condition check resulted in Store a System 
Token in an EFI Variable being skipped.
[   49.172574] systemd[1]: Condition check resulted in Commit a 
transient machine-id on disk being skipped.
[   49.217255] systemd[1]: Starting udev Kernel Device Manager...
         Starting udev Kernel Device Manager...
[   49.371412] synth uevent: /devices/vio: failed to send uevent
[   49.371571] vio vio: uevent: failed to send synthetic uevent
[   49.491657] systemd[1]: Finished udev Coldplug all Devices.
[  OK  ] Finished udev Coldplug all Devices.
[   49.628324] systemd[1]: Starting Helper to synchronize boot up for 
ifupdown...
         Starting Helper to synchronize boot up for ifupdown...
[   50.233143] systemd[1]: Finished Helper to synchronize boot up for 
ifupdown.
[  OK  ] Finished Helper to synchronize boot up for ifupdown.
[   50.454205] systemd[1]: Finished Set console font and keymap.
[  OK  ] Finished Set console font and keymap.
[   51.063745] systemd[1]: Started udev Kernel Device Manager.
[  OK  ] Started udev Kernel Device Manager.
[   52.366549] audit: type=1400 audit(1587083851.928:2): 
apparmor="STATUS" operation="profile_load" profile="unconfined" 
name="/usr/bin/man" pid=248 comm="apparmor_parser"
[   52.367512] audit: type=1400 audit(1587083851.936:3): 
apparmor="STATUS" operation="profile_load" profile="unconfined" 
name="man_filter" pid=248 comm="apparmor_parser"
[   52.375409] audit: type=1400 audit(1587083851.936:4): 
apparmor="STATUS" operation="profile_load" profile="unconfined" 
name="man_groff" pid=248 comm="apparmor_parser"
[   52.383058] audit: type=1400 audit(1587083851.940:5): 
apparmor="STATUS" operation="profile_load" profile="unconfined" 
name="lsb_release" pid=246 comm="apparmor_parser"
[   52.391144] audit: type=1400 audit(1587083851.956:6): 
apparmor="STATUS" operation="profile_load" profile="unconfined" 
name="nvidia_modprobe" pid=249 comm="apparmor_parser"
[   52.391422] audit: type=1400 audit(1587083851.956:7): 
apparmor="STATUS" operation="profile_load" profile="unconfined" 
name="nvidia_modprobe//kmod" pid=249 comm="apparmor_parser"
[   52.585958] systemd[1]: Finished Load AppArmor profiles.
[  OK  ] Finished Load AppArmor profiles.
[   52.922455] systemd[1]: Starting Raise network interfaces...
         Starting Raise network interfaces...
[ ***  ] (2 of 4) A start job is running for /dev/hvc0 (13s / 1min 30s)
[   56.082364] sd 0:0:0:0: Attached scsi generic sg0 type 0
[  *** ] (2 of 4) A start job is running for /dev/hvc0 (14s / 1min 30s)
[  OK  ] Found device /dev/hvc0.
[   58.286241] systemd[1]: Found device Virtio network device.
[  OK  ] Found device Virtio network device.
[   58.362930] systemd[1]: Started ifup for enp0s0.
[  OK  ] Started ifup for enp0s0.
[   60.156215] systemd[1]: Finished Raise network interfaces.
[  OK  ] Finished Raise network interfaces.
[   60.184923] systemd[1]: Reached target Network.
[  OK  ] Reached target Network.
[   61.462957] systemd[1]: Found device QEMU_HARDDISK 3.
[  OK  ] Found device QEMU_HARDDISK 3.
[   61.510296] systemd[1]: Activating swap 
/dev/disk/by-uuid/06e2749e-8e25-414c-8271-ab99dc676037...
         Activating swap /dev/disk/…8e25-414c-8271-ab99dc676037...
[   61.865681] Adding 12249024k swap on /dev/sda3.  Priority:-2 
extents:1 across:12249024k FS
[   61.981665] systemd[1]: Activated swap 
/dev/disk/by-uuid/06e2749e-8e25-414c-8271-ab99dc676037.
[  OK  ] Activated swap /dev/disk/b…e-8e25-414c-8271-ab99dc676037.
[   62.008105] systemd[1]: Reached target Swap.
[  OK  ] Reached target Swap.
[    **] A start job is running for Journal Service (22s / 1min 31s)
[  OK  ] Started Journal Service.
         Starting Flush Journal to Persistent Storage...
[   65.578217] systemd-journald[204]: Received client request to flush 
runtime journal.
[  OK  ] Finished Flush Journal to Persistent Storage.
         Starting Create Volatile Files and Directories...
[  OK  ] Finished Create Volatile Files and Directories.
         Starting Network Time Synchronization...
         Starting Update UTMP about System Boot/Shutdown...
[  OK  ] Finished Update UTMP about System Boot/Shutdown.
[  OK  ] Started Network Time Synchronization.
[  OK  ] Reached target System Initialization.
[  OK  ] Started Daily Cleanup of Temporary Directories.
[  OK  ] Reached target System Time Set.
[  OK  ] Reached target System Time Synchronized.
[  OK  ] Started Daily apt download activities.
[  OK  ] Started Daily apt upgrade and clean activities.
[  OK  ] Started Periodic ext4 Onli…ata Check for All Filesystems.
[  OK  ] Started Daily rotation of log files.
[  OK  ] Started Daily man-db regeneration.
[  OK  ] Reached target Timers.
[  OK  ] Listening on D-Bus System Message Bus Socket.
[  OK  ] Reached target Sockets.
[  OK  ] Reached target Basic System.
[  OK  ] Started Regular background program processing daemon.
[  OK  ] Started D-Bus System Message Bus.
         Starting Remove Stale Onli…t4 Metadata Check Snapshots...
         Starting System Logging Service...
         Starting OpenBSD Secure Shell server...
         Starting Login Service...
         Starting Permit User Sessions...
[  OK  ] Finished Permit User Sessions.
[  OK  ] Started Getty on tty1.
[  OK  ] Started Serial Getty on hvc0.
[  OK  ] Reached target Login Prompts.
[  OK  ] Started System Logging Service.
[  OK  ] Finished Remove Stale Onli…ext4 Metadata Check Snapshots.
[  OK  ] Started OpenBSD Secure Shell server.

Debian GNU/Linux bullseye/sid titan hvc0

titan login:
titan login: root
Password:
Linux titan 5.5.0-1-powerpc64le #1 SMP Debian 5.5.13-2 (2020-03-30) ppc64le

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Apr 16 14:02:37 UTC 2020 on hvc0
root@titan:~#
root@titan:~# pwd
/root
root@titan:~#
root@titan:~# ls -lap
total 20
drwx------  2 root root 4096 Apr 16 14:03 ./
drwxr-xr-x 18 root root 4096 Apr 16 10:43 ../
-rw-------  1 root root  773 Apr 17 00:06 .bash_history
-rw-r--r--  1 root root  570 Jan 31  2010 .bashrc
-rw-r--r--  1 root root  290 Apr 16 10:48 .profile
root@titan:~#
root@titan:~# cat /proc/cpuinfo
processor       : 0
cpu             : POWER9 (architected), altivec supported
clock           : 1000.000000MHz
revision        : 2.0 (pvr 004e 1200)

processor       : 1
cpu             : POWER9 (architected), altivec supported
clock           : 1000.000000MHz
revision        : 2.0 (pvr 004e 1200)

processor       : 2
cpu             : POWER9 (architected), altivec supported
clock           : 1000.000000MHz
revision        : 2.0 (pvr 004e 1200)

processor       : 3
cpu             : POWER9 (architected), altivec supported
clock           : 1000.000000MHz
revision        : 2.0 (pvr 004e 1200)

timebase        : 512000000
platform        : pSeries
model           : IBM pSeries (emulated by qemu)
machine         : CHRP IBM pSeries (emulated by qemu)
MMU             : Radix
root@titan:~#

From this point onwards I see an endless stream of :

Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
.
.
.

No idea what that is .. but it doesn't look friendly.

Also I did compile qemu with --enable-debug --disable-strip and the
performance is truely horrific.  I can only assume that those options
are the cause. Any thoughts from anyone would be wonderful.



--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional