Public bug reported:

In testing qemu 10.1 we've seen them start to fail on armhf and ppc64
(only there)

https://autopkgtest.ubuntu.com/packages/e/edk2/questing/armhf
https://autopkgtest.ubuntu.com/packages/e/edk2/questing/ppc64el

An example log is
https://autopkgtest.ubuntu.com/results/autopkgtest-questing/questing/ppc64el/e/edk2/20250818_045238_153f0@/log.gz


With a porterbox setup the good case is reproducible like this:

     sudo apt install -y ovmf ovmf-ia32 python3-pexpect qemu-efi-aarch64 
qemu-efi-arm qemu-efi-loongarch64 qemu-efi-riscv64 qemu-system-arm 
qemu-system-loongarch64 qemu-system-riscv64 qemu-system-x86
     apt source edk2
     cd edk2-2025.02/
     PYTHONPATH=./debian/python python3 debian/tests/shell.py
     PYTHONPATH=./debian/python python3 debian/tests/shell.py 2>&1 | tee -a 
~/compare-10.0.log
     ...
     works fine


Switching to the qemu 10.1 (and by dependency glibc) from proposed makes
this reproducible.


The error (or red herring) is

  241s ERROR:target/riscv/pmu.c:216:riscv_pmu_icount_update_priv: assertion 
failed: (newpriv <= PRV_S)
  241s Bail out! ERROR:target/riscv/pmu.c:216:riscv_pmu_icount_update_priv: 
assertion failed: (newpriv <= PRV_S)
  251s ERROR

PMU again - really? - /me is shaking the fist!


And inside the test that is

251s ======================================================================
251s ERROR: test_riscv64 (__main__.BootToShellTest.test_riscv64)
251s ----------------------------------------------------------------------
251s Traceback (most recent call last):
251s   File "/tmp/autopkgtest.RPBps3/build.f20/src/debian/tests/shell.py", line 
100, in run_cmd_check_shell
251s     i = child.expect(
251s         [
251s     ...<3 lines>...
251s             timeout=TEST_TIMEOUT,
251s     )
251s   File "/usr/lib/python3/dist-packages/pexpect/spawnbase.py", line 354, in 
expect
251s     return self.expect_list(compiled_pattern_list,
251s            ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
251s             timeout, searchwindowsize, async_)
251s             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
251s   File "/usr/lib/python3/dist-packages/pexpect/spawnbase.py", line 383, in 
expect_list
251s     return exp.expect_loop(timeout)
251s            ~~~~~~~~~~~~~~~^^^^^^^^^
251s   File "/usr/lib/python3/dist-packages/pexpect/expect.py", line 179, in 
expect_loop
251s     return self.eof(e)
251s            ~~~~~~~~^^^
251s   File "/usr/lib/python3/dist-packages/pexpect/expect.py", line 122, in eof
251s     raise exc

AFAICS this very much comes down to

251s args: [b'/usr/bin/qemu-system-riscv64', b'-no-user-config',
b'-nodefaults', b'-m', b'256', b'-smp',
b'1,sockets=1,cores=1,threads=1', b'-display', b'none', b'-serial',
b'stdio', b'-machine', b'virt', b'-device', b'virtio-serial-device',
b'-drive', b'file=/usr/share/qemu-efi-
riscv64/RISCV_VIRT_CODE.fd,if=pflash,format=raw,unit=0,readonly=on',
b'-drive',
b'file=/tmp/tmpr31gjfit,if=pflash,format=raw,unit=1,readonly=off']


From here I have two log filed for 10.0 and 10.1 which we can compare, but the 
diff shows no interesting Delta until the bug happens.
I need to modify the test to keep the artifacts around and allow it to be ran 
directly.

We can steal the test drive from the test (will attach) and then isolate
the command:

Command:
qemu-system-riscv64 -no-user-config -nodefaults -m 256 -smp 
'1,sockets=1,cores=1,threads=1' -display 'none' -serial 'stdio' -machine 'virt' 
-device 'virtio-serial-device' -drive 
'file=/usr/share/qemu-efi-riscv64/RISCV_VIRT_CODE.fd,if=pflash,format=raw,unit=0,readonly=on'
 -drive 'file=/tmp/testdrive,if=pflash,format=raw,unit=1,readonly=off'


Riddles: At least in automation they only fail on armhf and ppc64 (?!?)
?

** Affects: edk2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: server-todo

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https://bugs.launchpad.net/bugs/2120835

Title:
  EDK2 tests for riscv emulation fail against qemu 10.1 (but only on
  ppc64 and armhf)

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