Re: pkg/59820 (QEMU 10.1.2 no longer work with `-smp 2` (or more) with NVMM (qemu 10.1.1 -> 10.1.2 regression))

[leot%NetBSD.org@localhost]

Synopsis: QEMU 10.1.2 no longer work with `-smp 2` (or more) with NVMM (qemu 10.1.1 -> 10.1.2 regression)

State-Changed-From-To: open->closed
State-Changed-By: leot%NetBSD.org@localhost
State-Changed-When: Sat, 06 Dec 2025 20:20:02 +0000
State-Changed-Why:
This is an actual upstream issue and affects also other accelerators.

It is known as https://gitlab.com/qemu-project/qemu/-/issues/3178 and
QEMU 10.1.3 will contain that fix and it was backeported in
qemu-10.1.2nb2.

Bisected by building upstream qemu v1.10.1 (working), v1.10.2 (not working)
and v10.1.3 (working) and then by skimming the commit messages between
v10.1.2 and v10.1.3.

Upstream QEMU was configured via:

./configure --target-list=x86_64-softmmu --disable-alsa --disable-bochs --disable-capstone --disable-curl --disable-curses --disable-dbus-display --disable-docs --disable-gnutls --disable-gtk --disable-guest-agent --disable-iconv --disable-opengl --disable-oss --disable-pixman --disable-png --disable-sdl --disable-spice --disable-spice-protocol --disable-vnc

...and it also needed the first snippet of patch-target_i386_nvmm_nvmm-all.c otherwise
it will not build.