[Bug 1723914] Re: ubuntu-kvm-unit test failed with emulator test on ppc64le

ChristianEhrhardt 1723914 at bugs.launchpad.net
Wed Apr 4 11:02:53 UTC 2018 

SRU Template prepared

Once ppa is built:
- Regression tests
- per case tests

Note: test build in ppa at https://launchpad.net/~ci-train-ppa-
service/+archive/ubuntu/3224

** Description changed:

+ [Impact]
+ 
+  * on start of qemu-system-ppc64 MSR_SF is not set correctly
+    So it doesn't start 64bit as it should
+ 
+  * Todays guests usually work around this and are fine, but it is 
+    incorrect and might be an issue down the road. Furthermore this is also 
+    a fixup to some verification tests at the same time.
+ 
+ [Test Case]
+ 
+  * 1. deploy xenial + HWE kernel on a ppc64el box
+    2. sudo apt-get install qemu-kvm -y
+    3. git clone --depth=1 https://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
+    4. cd kvm-unit-tests
+    5. ./configure --endian=little; make
+    6. sudo ppc64_cpu --smt=off
+    7. sudo ./run_tests -v
+ 
+ [Regression Potential]
+ 
+  * The changes are ppc only and provided by IBM so the potential risk is
+    retained to the owner of the Area.
+    Further the change is very small, so it has a very low amount of being 
+    misunderstood.
+ 
+ [Other Info]
+ 
+  * n/a
+ 
+ ---
+ 
+ 
  Similar to bug 1723904, bug 1712803.
  The failed "emulator" test from kvm-unit-test will pass with qemu-2.7.1 built from source.
  
  ubuntu at modoc:~/kvm-unit-tests$ sudo /bin/bash -c "TESTNAME=emulator TIMEOUT=90s ACCEL= ./powerpc/run powerpc/emulator.elf -smp 1
  > "
  timeout -k 1s --foreground 90s /usr/bin/qemu-system-ppc64 -nodefaults -machine pseries,accel=kvm -bios powerpc/boot_rom.bin -display none -serial stdio -kernel powerpc/emulator.elf -smp 1 # -initrd /tmp/tmp.BJ2sE7V2Jc
  FAIL: emulator: 64bit: detected
  PASS: emulator: invalid: exception
  PASS: emulator: lswx: alignment
  PASS: emulator: lswi: alignment
  SUMMARY: 4 tests, 1 unexpected failures
  
  EXIT: STATUS=3
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1
  ProcVersionSignature: User Name 4.10.0-37.41~16.04.1-generic 4.10.17
  Uname: Linux 4.10.0-37-generic ppc64le
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: ppc64el
  Date: Mon Oct 16 10:10:46 2017
  ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcLoadAvg: 0.00 0.00 0.57 1/1457 83356
  ProcLocks:
-  1: POSIX  ADVISORY  WRITE 1604 00:14:19651 0 EOF
-  2: POSIX  ADVISORY  WRITE 2937 00:14:55331 0 EOF
-  3: FLOCK  ADVISORY  WRITE 3046 00:14:67623 0 EOF
-  4: POSIX  ADVISORY  WRITE 3124 00:14:57398 0 EOF
-  5: POSIX  ADVISORY  WRITE 3047 00:14:87068 0 EOF
+  1: POSIX  ADVISORY  WRITE 1604 00:14:19651 0 EOF
+  2: POSIX  ADVISORY  WRITE 2937 00:14:55331 0 EOF
+  3: FLOCK  ADVISORY  WRITE 3046 00:14:67623 0 EOF
+  4: POSIX  ADVISORY  WRITE 3124 00:14:57398 0 EOF
+  5: POSIX  ADVISORY  WRITE 3047 00:14:87068 0 EOF
  ProcSwaps:
-  Filename				Type		Size	Used	Priority
-  /swap.img                               file		8388544	0	-1
+  Filename				Type		Size	Used	Priority
+  /swap.img                               file		8388544	0	-1
  ProcVersion: Linux version 4.10.0-37-generic (buildd at bos01-ppc64el-026) (gcc version 5.4.0 20160609 (User Name/IBM 5.4.0-6ubuntu1~16.04.4) ) #41~16.04.1-User Name SMP Fri Oct 6 22:44:24 UTC 2017
  SourcePackage: linux-hwe
  UpgradeStatus: No upgrade log present (probably fresh install)
  cpu_cores: Number of cores present = 20
  cpu_coreson: Number of cores online = 20
  cpu_smt: SMT is off

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https://bugs.launchpad.net/bugs/1723914

Title:
  ubuntu-kvm-unit test failed with emulator test on ppc64le

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  Confirmed
Status in qemu package in Ubuntu:
  New
Status in linux source package in Xenial:
  New
Status in qemu source package in Xenial:
  Triaged
Status in linux source package in Artful:
  New
Status in qemu source package in Artful:
  Fix Released

Bug description:
  [Impact]

   * on start of qemu-system-ppc64 MSR_SF is not set correctly
     So it doesn't start 64bit as it should

   * Todays guests usually work around this and are fine, but it is 
     incorrect and might be an issue down the road. Furthermore this is also 
     a fixup to some verification tests at the same time.

  [Test Case]

   * 1. deploy xenial + HWE kernel on a ppc64el box
     2. sudo apt-get install qemu-kvm -y
     3. git clone --depth=1 https://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
     4. cd kvm-unit-tests
     5. ./configure --endian=little; make
     6. sudo ppc64_cpu --smt=off
     7. sudo ./run_tests -v

  [Regression Potential]

   * The changes are ppc only and provided by IBM so the potential risk is
     retained to the owner of the Area.
     Further the change is very small, so it has a very low amount of being 
     misunderstood.

  [Other Info]

   * n/a

  ---

  
  Similar to bug 1723904, bug 1712803.
  The failed "emulator" test from kvm-unit-test will pass with qemu-2.7.1 built from source.

  ubuntu at modoc:~/kvm-unit-tests$ sudo /bin/bash -c "TESTNAME=emulator TIMEOUT=90s ACCEL= ./powerpc/run powerpc/emulator.elf -smp 1
  > "
  timeout -k 1s --foreground 90s /usr/bin/qemu-system-ppc64 -nodefaults -machine pseries,accel=kvm -bios powerpc/boot_rom.bin -display none -serial stdio -kernel powerpc/emulator.elf -smp 1 # -initrd /tmp/tmp.BJ2sE7V2Jc
  FAIL: emulator: 64bit: detected
  PASS: emulator: invalid: exception
  PASS: emulator: lswx: alignment
  PASS: emulator: lswi: alignment
  SUMMARY: 4 tests, 1 unexpected failures

  EXIT: STATUS=3

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1
  ProcVersionSignature: User Name 4.10.0-37.41~16.04.1-generic 4.10.17
  Uname: Linux 4.10.0-37-generic ppc64le
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: ppc64el
  Date: Mon Oct 16 10:10:46 2017
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcLoadAvg: 0.00 0.00 0.57 1/1457 83356
  ProcLocks:
   1: POSIX  ADVISORY  WRITE 1604 00:14:19651 0 EOF
   2: POSIX  ADVISORY  WRITE 2937 00:14:55331 0 EOF
   3: FLOCK  ADVISORY  WRITE 3046 00:14:67623 0 EOF
   4: POSIX  ADVISORY  WRITE 3124 00:14:57398 0 EOF
   5: POSIX  ADVISORY  WRITE 3047 00:14:87068 0 EOF
  ProcSwaps:
   Filename				Type		Size	Used	Priority
   /swap.img                               file		8388544	0	-1
  ProcVersion: Linux version 4.10.0-37-generic (buildd at bos01-ppc64el-026) (gcc version 5.4.0 20160609 (User Name/IBM 5.4.0-6ubuntu1~16.04.4) ) #41~16.04.1-User Name SMP Fri Oct 6 22:44:24 UTC 2017
  SourcePackage: linux-hwe
  UpgradeStatus: No upgrade log present (probably fresh install)
  cpu_cores: Number of cores present = 20
  cpu_coreson: Number of cores online = 20
  cpu_smt: SMT is off

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