 |
| Hercules IBM Z/Architecture Mainframe Emulator Console |
 |
| IBM S/390 Picture courtesy of The Computer Sheds |
Inspired by Astr0baby's blog post and Jeff Sipek's guide, I decided to install Ubuntu 18 "Bionic Beaver" Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-36-generic s390x) on a Hercules-emulated IBM S/390 Mainframe computer running on OpenSUSE Tumbleweed inside a Oracle VirtualBox appliance. This is the first mainframe-class machine emulated at SANYALnet Labs.
Hercules 4.0 Hyperion mainframe emulator was used for the guest S/390. "Hercules is an open source software implementation of the mainframe System/370 and ESA/390 architectures, in addition to the latest 64-bit z/Architecture." - Hercules official web page.
OpenSUSE Packages
Packages installed in preparation of OpenSUSE Tumbleweed as the build and execution environment for Hercules hypervisor include the following. The standard zypper package management tool for OpenSUSE was used.
# zypper install bridge-utils uml-utilities tunctl net-tools-deprecated ipcalc git cmake vde2 libcap-progs libpcap-devel libpcap1 pcapdump pcapinfo
# zypper install -t pattern devel_C_C++
HOST NETWORK SETUP
OpenSUSE Tumbleweed; IP: 10.100.0.22/24
Guest: S/390, IP Address 10.100.0.23/24
Gateway: 10.100.0.1
DNS: 8.8.8.8 (google DNS)
 |
| Ubuntu s390x Installer Error accessing Archive Mirrors over Internet |
# systemctl disable firewalld
# systemctl stop firewalld
-
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| #!/bin/bash | |
| # --- | |
| # bridge-tap-vde-setup.sh | |
| # --- | |
| # Bridge, VDE and Tun/Tap Network Device Setup Script to run emulators. | |
| # The best place to execute this is probably from /etc/network/if-up.d/ | |
| # (assuming Network Manager is running, not dhcpcd or other dhcp clients) | |
| # | |
| # Two configuration items are below, make sure to set them correctly. | |
| # *** IMPORTANT *** Default DNS also needs to be manually configured on some | |
| # systems, e.g. for Ubuntu edit /etc/systemd/resolved.conf | |
| # | |
| # Uses gawk and ipcalc; make sure they are installed. | |
| # Writes some dubiously helpful information to kernel log, use dmesg to view. | |
| # | |
| # Attempts to disable firewall, clears out iptables, and sets up IPv4 forwarding | |
| # | |
| # To see what it accomplished (or not), look at kernel log (dmesg) | |
| # | |
| # Tested on OpenSUSE Tumbleweed and Raspbian hosts with Hercules IBM S/390 | |
| # Mainframe and AlphaVM Free DEC Alphaserver ES40 guests running concurrently. | |
| # Some form of this script is running on numerous hobbyist servers of mine, | |
| # including a MX Linux server hosting over 33 SIMH VAX and PDP instances | |
| # talking DECnet and IP on two different VDE switches | |
| # | |
| # Please understand and tweak as you need; it basically aims to do this: | |
| # | |
| # ---- | |
| # ----------|tun0| <--> IBM S/390 emulator | |
| # | ---- (Hercules sets this up using /dev/net/tun) | |
| # ------- | |
| # |Network| | |
| # |Adapter| | |
| # | | | |
| # ------- | |
| # | ------ | |
| # ----------|bridge| | |
| # |br-ip | | |
| # ------ | |
| # | -------- | |
| # |--------|inettap0| <--> For use by any emulator | |
| # | -------- | |
| # | | |
| # | ---------- | |
| # --------|VDE Switch| (Virtual Distributed Ethernet switch) | |
| # ---------- | |
| # | | |
| # | ----------- | |
| # |-|vde-ip-tap0| <--> Available to more emulators | |
| # | ----------- | |
| # | | |
| # | ----------- | |
| # |-|vde-ip-tap1| <--> AlphaServer ES40 emulator | |
| # | ----------- | |
| # | | |
| # |-... update script to keep adding | |
| # | more vde tap interfaces as needed. | |
| # | |
| # More details: | |
| # http://supratim-sanyal.blogspot.com/2018/10/bionic-beaver-on-zarchitecture-my.html | |
| # | |
| # Licensed under "THE BEER-WARE LICENSE" (Revision 42): | |
| # Supratim Sanyal <https://goo.gl/FqzyBW> wrote this file. As long as | |
| # you retain this notice you can do whatever you want with this stuff. | |
| # If we meet some day, and you think this stuff is worth it, you can buy | |
| # me a beer in return. | |
| # --- | |
| # ---- | |
| # Edit DEVICE to physical interface that has the IP address which will be moved | |
| # to a bridge, and TAP and VDE plug interfaces made available from the bridge | |
| # ---- | |
| DEVICE="eth0" | |
| # ---- | |
| # Edit LOCALUSER to username of the user running simulators | |
| # ---- | |
| LOCALUSER="system" | |
| # ------------------------------------------------------------------------------ | |
| # No more changes should be required from here | |
| # ------------------------------------------------------------------------------ | |
| echo ${0}: Start | tee /dev/kmsg | |
| # ---- | |
| # Exit if we're called for the loopback | |
| # ---- | |
| if [ "${DEVICE}" = lo ]; then | |
| echo ${0}: Doing nothing and exiting for interface ${DEVICE} | tee /dev/kmsg | |
| exit 0 | |
| fi | |
| # ---- | |
| # Make sure the NIC exists | |
| # ---- | |
| if [ ! -d "/sys/class/net/${DEVICE}" ]; then | |
| echo ${0}: ${DEVICE} does not exist | tee /dev/kmsg | |
| echo ${0}: Please check config parameter | tee /dev/kmsg | |
| exit 1 | |
| fi | |
| # ---- | |
| # Make sure the local username exists | |
| # ---- | |
| if ! id "${LOCALUSER}" &>/dev/null; then | |
| echo ${0}: User ${LOCALUSER} does not exist | tee /dev/kmsg | |
| echo ${0}: Please check config parameter | tee /dev/kmsg | |
| exit 1 | |
| fi | |
| # ---- | |
| # Make sure uncommon utilities are installed | |
| # ---- | |
| if ! type -P "gawk" &>/dev/null; then | |
| echo ${0}: gawk utility does not exist | tee /dev/kmsg | |
| echo ${0}: Please install all the requirements | tee /dev/kmsg | |
| exit 1 | |
| fi | |
| if ! type -P "ipcalc" &>/dev/null; then | |
| echo ${0}: ipcalc utility does not exist | tee /dev/kmsg | |
| echo ${0}: Please install all the requirements | tee /dev/kmsg | |
| exit 1 | |
| fi | |
| if ! type -P "vde_switch" &>/dev/null; then | |
| echo ${0}: vde2 does not seem to be installed | tee /dev/kmsg | |
| echo ${0}: Please install all the requirements | tee /dev/kmsg | |
| exit 1 | |
| fi | |
| # ---- | |
| # Make sure an IP address is assigned to the interface | |
| # ---- | |
| HOSTIPANDMASK=`ip addr show dev ${DEVICE} | grep inet | head -1 | cut -f 6 -d " "` | |
| if [ -z "${HOSTIPANDMASK}" ]; then | |
| echo ${0}: ${DEVICE} has no IP address | tee /dev/kmsg | |
| echo ${0}: Exiting for ${DEVICE} | tee /dev/kmsg | |
| # We exit with normal status because if this script is invoked from | |
| # if-up.d it is invoked multiple times, sometimes with no IP | |
| # on DEVICE, which is OK. | |
| exit 0 | |
| fi | |
| echo ${0}: ${DEVICE} address and netmask ${HOSTIPANDMASK} | tee /dev/kmsg | |
| # --- | |
| # All checks passed; do not allow repeat invokations from here on | |
| # --- | |
| if test -r "/run/bridge-tap-vde-setup-lock"; then | |
| echo ${0}: Already set up for adapter `cat /run/bridge-tap-vde-setup-lock` | tee /dev/kmsg | |
| exit 0 | |
| else | |
| echo ${0}: ${DEVICE} address and netmask ${HOSTIPANDMASK} > /run/bridge-tap-vde-setup-lock | |
| fi | |
| HOSTIP=`echo ${HOSTIPANDMASK}|cut -f 1 -d "/"` | |
| HOSTNETMASK=`echo ${HOSTIPANDMASK}|cut -f 2 -d "/"` | |
| HOSTBCASTADDR=`ip addr show dev ${DEVICE} | grep inet | head -1 | cut -f 8 -d " "` | |
| HOSTDEFAULTGATEWAY=`route -n | grep ^0.0.0.0 | gawk -- '{ print $2 }'` | |
| NETWORK=`ipcalc $HOSTIP/$HOSTNETMASK | grep Network | cut -f 2 -d ":" | cut -f 1 -d "/" | tr -d '[:space:]'` | |
| echo ${0}: ---- GATHERED INFORMATION ----- | tee /dev/kmsg | |
| echo ${0}: NETWORK INTERFACE=${DEVICE} | tee /dev/kmsg | |
| echo ${0}: HOSTIP=$HOSTIP HOSTNETMASK=$HOSTNETMASK | tee /dev/kmsg | |
| echo ${0}: NETWORK=$NETWORK HOSTBCASTADDR=$HOSTBCASTADDR HOSTDEFAULTGATEWAY=$HOSTDEFAULTGATEWAY | tee /dev/kmsg | |
| echo ${0}: ------------------------------- | tee /dev/kmsg | |
| # --- | |
| # set up for Hercules IBM S/390 emulator which uses TUN interface not TAP | |
| # --- | |
| # Enable IPv4 packet forwarding | |
| sysctl -w net.ipv4.ip_forward=1 | |
| sysctl -w net.ipv4.conf.all.proxy_arp=1 | |
| # Make sure firewall is stopped and disabled (one of the following should work | |
| # if a firewall is installed, otherwise these will produce ignorable errors ... | |
| systemctl stop firewalld | |
| systemctl disable firewalld | |
| ufw disable | |
| # Flush and clear iptables | |
| iptables-restore -v --wait 2 << IPTABLES-RULES | |
| *filter | |
| :INPUT ACCEPT [0:0] | |
| :FORWARD ACCEPT [0:0] | |
| :OUTPUT ACCEPT [0:0] | |
| COMMIT | |
| IPTABLES-RULES | |
| # --- | |
| # end set up for Hercules IBM S/390 emulator which uses TUN interface not TAP | |
| # --- | |
| # --- | |
| # Create a TAP network interface for tap/pcap hungry emulators | |
| # --- | |
| ip tuntap add inettap0 mode tap user ${LOCALUSER} | |
| # --- | |
| # Also create a VDE switch with TAP plugs for use by simuators | |
| # --- | |
| vde_switch -t vde-ip-tap0 -s /tmp/vde-ip.ctl -m 666 --mgmt /tmp/vde-ip.mgmt --mgmtmode 666 --daemon # spare plug | |
| vde_plug2tap -s /tmp/vde-ip.ctl -m 666 -d vde-ip-tap1 # AlphaServer ES40 | |
| #vde_plug2tap -s /tmp/vde-ip.ctl -m 666 -d vde-ip-tap2 # spare plug | |
| #vde_plug2tap -s /tmp/vde-ip.ctl -m 666 -d vde-ip-tap3 # spare plug | |
| # Create a Bridge | |
| ip link add name br-ip type bridge | |
| brctl stp br-ip on | |
| # Bridge the NIC ${DEVICE}, the TAP device and VDE Switch TAP0 plug | |
| ip link set ${DEVICE} master br-ip | |
| ip link set inettap0 master br-ip | |
| ip link set vde-ip-tap0 master br-ip | |
| # Remove obsolete default route and move the IP address from ${DEVICE} to | |
| # the bridge | |
| ip route delete default via $HOSTDEFAULTGATEWAY dev ${DEVICE} | |
| ip addr flush dev ${DEVICE} | |
| ip addr add ${HOSTIPANDMASK} broadcast $HOSTBCASTADDR dev br-ip | |
| # Bring everything back up | |
| ip link set dev inettap0 up | |
| ip link set vde-ip-tap0 up | |
| ip link set vde-ip-tap1 up | |
| #ip link set vde-ip-tap2 up | |
| #ip link set vde-ip-tap3 up | |
| #... | |
| ip link set dev br-ip up | |
| # Reset the default route to via the bridge interface which now has the IP | |
| ip route add default via $HOSTDEFAULTGATEWAY dev br-ip | |
| echo ${0}: ---- NETWORK RECONFIGURED, WAITING TO SETTLE DOWN ---- | tee /dev/kmsg | |
| sleep 15 | |
| sync;sync;sync | |
| echo ${0}: ---- AFTER BRIDGE AND TAP ---- | tee /dev/kmsg | |
| ip addr | tee /dev/kmsg | |
| echo ${0}: --- ROUTE --- | tee /dev/kmsg | |
| route -n | tee /dev/kmsg | |
| echo ${0}: --- BRIDGE --- | tee /dev/kmsg | |
| brctl show | tee /dev/kmsg | |
| echo ${0}: --- IPTABLES --- | tee /dev/kmsg | |
| iptables -L | tee /dev/kmsg | |
| echo ${0}: --- PING TEST --- | tee /dev/kmsg | |
| PINGOK=0 | |
| for i in {1..15} | |
| do | |
| ping -c 1 -w 5 google.com | tee /dev/kmsg | |
| if [ "$?" -eq 0 ]; then | |
| PINGOK=1 | |
| echo ${0}: Internet becomes reachable on ping try $i | tee /dev/kmsg | |
| break | |
| else | |
| echo ${0}: Internet unreachable on ping try $i | tee /dev/kmsg | |
| sleep 1 | |
| fi | |
| done | |
| if [ "${PINGOK}" -eq 0 ]; then | |
| echo ${0}: WARNING Cannot reach the internet or DNS issue | tee /dev/kmsg | |
| fi | |
| # -- | |
| # We can now attach simulators | |
| # -- | |
| sync;sync;sync | |
| echo ${0}: Normal Exit | tee /dev/kmsg | |
| exit 0 |
-
The following was added to /etc/init.d/after.local to get the network setup script to execute at boot time:
#!/bin/bash
#
# --
# /etc/init.d/after.local
# --
touch /forcefsck
/root/netsetup/bridge-tap-vde-setup.sh > /tmp/bridge-tap-vde-setup.sh 2>&1
sync
exit 0
Also the after-local service was enabled for /etc/init.d/after.local script to execute at boot-time:
# systemctl enable after-local.service
# systemctl start after-local.service
IBM S/390 Mainframe in Hercules and Ubuntu 18 (s390x) installation
 |
| Hercules startup and CD-ROM boot command |
Astr0baby's instructions were followed for rest of the installation of Ubuntu 18 s390x on the guest. The full command to mount the downloaded distribution CD-ROM ISO image on OpenSUSE's /mnt directory is:
$ sudo mount -t iso9660 -o loop ubuntu-18.04.1-server-s390x.iso /mnt
The following hercules.cnf file was used:
-
-
Hercules had to be launched from OpenSUSE root account; even sudo from a user account did not work for letting Hercules access the tun adapter completely for networking. This is despite setting permissions on the /dev/net/tun, /use/local/bin/hercifc etc. as described in "Hercules Version 4: TCP/IP networking with Hercules".
Since any desired Ubuntu packages could be installed later, only the "SSH server" option was selected in addition to the Ubuntu base install in the installation software selection options screen.
The actual Ubuntu 18.04 s390x installation turned out to be uneventful. It followed a similar path to Ubuntu installation on x64. Automatic post-installation reboot did not work as Hercules stopped with halt when the guest operating system shut down for reboot. Exiting and relaunching the emulator and booting the guest operating system worked fine. Here is a video captured during the installation process:
Automatic boot-up of guest Ubuntu s390x on startup of Hercules hypervisor was achieved by creating a file "hercules.rc" in the same directory as "hercules.cnf" with a line containing the same command used at the Hercules prompt to boot manually:
ipl 120
Pressing ESC in the Hercules console screen toggles between a "graphical" view of the S/390 showing processor registers, the processor status word/flags, CPU usage, disk and network I/O etc. as in the example at the top of this post.
Anything typed in starting with a period at the Hercules console's "herc ====>" prompt is sent on to the virtual guest directly (i.e. not processed by the emulator itself). Therefore, even if SSH access to the Ubuntu s390x guest is unavailable, it is possible to login to Ubuntu s390x by entering .username and .password starting with a period (i.e. a dot) at the beginning on the Hercules console, and execute Linux commands by typing them in starting with dots the same way.
It is exciting to be able to run a mainframe version of Ubuntu as a hobbyist system!
-
-
Download
You can download free snippets of the experiment's session logs from my google drive. In addition. here are some random images of screenshots taken during having all this fun!
-
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| ARCHMODE z/Arch | |
| #ARCHLVL z/Arch | |
| #ALRF ENABLE (deprecated) | |
| archlvl ENABLE asn_lx_reuse | |
| CCKD RA=2,RAQ=4,RAT=2,WR=2,GCINT=5,GCPARM=0,NOSTRESS=0,TRACE=0,FREEPEND=-1 | |
| CNSLPORT 3270 | |
| CONKPALV (3,1,10) | |
| CPUMODEL 3090 | |
| CPUSERIAL 012345 | |
| DIAG8CMD ENABLE | |
| ECPSVM YES | |
| LOADPARM 0A95DB.. | |
| LPARNAME HERCULES | |
| MAINSIZE 1024 | |
| MOUNTED_TAPE_REINIT DISALLOW | |
| NUMCPU 2 | |
| OSTAILOR Z/OS | |
| PANRATE 80 | |
| PGMPRDOS LICENSED | |
| SHCMDOPT NODIAG8 | |
| SYSEPOCH 1900 | |
| TIMERINT 50 | |
| TZOFFSET +1400 | |
| YROFFSET 0 | |
| # .-----------------------Device number | |
| # | .-----------------Device type | |
| # | | .---------File name and parameters | |
| # | | | | |
| # V V V | |
| #--- ---- -------------------- | |
| # Display Terminals | |
| 0700 3270 | |
| 0701 3270 | |
| # dasd | |
| 0120 3390 ./dasd/ubuntu.disk | |
| ## console | |
| ##001F 3270 | |
| # | |
| ## terminal | |
| ##0009 3215 | |
| # | |
| ## reader | |
| ##000C 3505 ./rdr/kernel.debian ./rdr/parmfile.debian ./rdr/initrd.debian autopad eof | |
| # | |
| ## printer | |
| ##000E 1403 ./prt/print00e.txt crlf | |
| # | |
| ## dasd | |
| ##0120 3390 ./dasd/3390.LINUX.0120 | |
| ##0121 3390 ./dasd/3390.LINUX.0121 | |
| # | |
| ## tape | |
| ##0581 3420 | |
| # network s390 realbox | |
| 0A00,0A01 CTCI -n /dev/net/tun -t 1500 10.100.0.23 10.100.0.22 |
-
Hercules had to be launched from OpenSUSE root account; even sudo from a user account did not work for letting Hercules access the tun adapter completely for networking. This is despite setting permissions on the /dev/net/tun, /use/local/bin/hercifc etc. as described in "Hercules Version 4: TCP/IP networking with Hercules".
Since any desired Ubuntu packages could be installed later, only the "SSH server" option was selected in addition to the Ubuntu base install in the installation software selection options screen.
The actual Ubuntu 18.04 s390x installation turned out to be uneventful. It followed a similar path to Ubuntu installation on x64. Automatic post-installation reboot did not work as Hercules stopped with halt when the guest operating system shut down for reboot. Exiting and relaunching the emulator and booting the guest operating system worked fine. Here is a video captured during the installation process:
Automatic boot-up of guest Ubuntu s390x on startup of Hercules hypervisor was achieved by creating a file "hercules.rc" in the same directory as "hercules.cnf" with a line containing the same command used at the Hercules prompt to boot manually:
ipl 120
Anything typed in starting with a period at the Hercules console's "herc ====>" prompt is sent on to the virtual guest directly (i.e. not processed by the emulator itself). Therefore, even if SSH access to the Ubuntu s390x guest is unavailable, it is possible to login to Ubuntu s390x by entering .username and .password starting with a period (i.e. a dot) at the beginning on the Hercules console, and execute Linux commands by typing them in starting with dots the same way.
It is exciting to be able to run a mainframe version of Ubuntu as a hobbyist system!
-
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| ➤ ssh ibmuser@10.100.0.23 | |
| Welcome to Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-36-generic s390x) | |
| * Documentation: https://help.ubuntu.com | |
| * Management: https://landscape.canonical.com | |
| * Support: https://ubuntu.com/advantage | |
| System information as of Sat Oct 20 13:28:17 BST 2018 | |
| System load: 1.71 Processes: 104 | |
| Usage of /: 73.1% of 2.19GB Users logged in: 0 | |
| Memory usage: 21% IP address for slca00: 10.100.0.23 | |
| Swap usage: 0% | |
| 0 packages can be updated. | |
| 0 updates are security updates. | |
| Last login: Sat Oct 20 13:17:08 2018 from 10.100.0.22 | |
| To run a command as administrator (user "root"), use "sudo <command>". | |
| See "man sudo_root" for details. | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ uname -a | |
| Linux s390x 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:13:24 UTC 2018 s390x s390x s390x GNU/Linux | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ cat /proc/cpuinfo | |
| vendor_id : IBM/S390 | |
| # processors : 2 | |
| bogomips per cpu: 192307.00 | |
| max thread id : 0 | |
| features : esan3 zarch stfle msa ldisp eimm edat etf3eh highgprs sie | |
| facilities : 0 1 2 3 6 7 8 9 10 11 13 16 17 18 19 20 21 22 23 24 25 26 27 28 30 31 32 33 34 35 36 40 41 42 43 45 47 49 52 66 75 76 77 | |
| cache0 : level=1 type=Data scope=Private size=512K line_size=256 associativity=-1 | |
| cache1 : level=1 type=Instruction scope=Private size=512K line_size=256 associativity=-1 | |
| processor 0: version = 00, identification = 012345, machine = 3090 | |
| processor 1: version = 00, identification = 112345, machine = 3090 | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ cat /proc/ioports | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ free -h | |
| total used free shared buff/cache available | |
| Mem: 797M 68M 92M 280K 635M 677M | |
| Swap: 105M 0B 105M | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ df -h | |
| Filesystem Size Used Avail Use% Mounted on | |
| udev 393M 0 393M 0% /dev | |
| tmpfs 80M 280K 80M 1% /run | |
| /dev/dasda1 2.2G 1.9G 205M 91% / | |
| tmpfs 399M 0 399M 0% /dev/shm | |
| tmpfs 5.0M 0 5.0M 0% /run/lock | |
| tmpfs 399M 0 399M 0% /sys/fs/cgroup | |
| tmpfs 80M 0 80M 0% /run/user/1000 | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ cat /proc/interrupts | |
| CPU0 CPU1 | |
| EXT: 370136 360776 | |
| I/O: 98294 73850 | |
| AIO: 0 0 | |
| CLK: 252482 254795 [EXT] Clock Comparator | |
| EXC: 117522 105843 [EXT] External Call | |
| EMS: 0 0 [EXT] Emergency Signal | |
| TMR: 0 0 [EXT] CPU Timer | |
| TAL: 0 0 [EXT] Timing Alert | |
| PFL: 0 0 [EXT] Pseudo Page Fault | |
| DSD: 0 0 [EXT] DASD Diag | |
| VRT: 0 0 [EXT] Virtio | |
| SCP: 132 138 [EXT] Service Call | |
| IUC: 0 0 [EXT] IUCV | |
| CMS: 0 0 [EXT] CPU-Measurement: Sampling | |
| CMC: 0 0 [EXT] CPU-Measurement: Counter | |
| FTP: 0 0 [EXT] HMC FTP Service | |
| CIO: 5 4 [I/O] Common I/O Layer Interrupt | |
| QAI: 0 0 [I/O] QDIO Adapter Interrupt | |
| DAS: 32030 26348 [I/O] DASD | |
| C15: 0 0 [I/O] 3215 | |
| C70: 0 0 [I/O] 3270 | |
| TAP: 0 0 [I/O] Tape | |
| VMR: 0 0 [I/O] Unit Record Devices | |
| LCS: 0 0 [I/O] LCS | |
| CTC: 66259 47498 [I/O] CTC | |
| APB: 0 0 [I/O] AP Bus | |
| ADM: 0 0 [I/O] EADM Subchannel | |
| CSC: 0 0 [I/O] CHSC Subchannel | |
| PCI: 0 0 [I/O] PCI Interrupt | |
| MSI: 0 0 [I/O] MSI Interrupt | |
| VIR: 0 0 [I/O] Virtual I/O Devices | |
| VAI: 0 0 [I/O] Virtual I/O Devices AI | |
| NMI: 0 0 [NMI] Machine Check | |
| RST: 0 1 [CPU] CPU Restart | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ | |
| ibmuser@s390x:~$ |
-
Download
You can download free snippets of the experiment's session logs from my google drive. In addition. here are some random images of screenshots taken during having all this fun!
