applied (subset): [PATCH qemu-server v4 0/9] add hotplug tests and fix uncovered bugs

[Fiona Ebner <f.ebner@proxmox.com>]

On Fri, 23 Oct 2026 15:01:03 +0200, Dominik Csapak wrote:
> Recently it was uncovered that hotplugging scsiX >= 14 does not work
> in all situations. Inspired by this, this attempts to add some hotplug
> regression tests by simulating the qmp/hmp environment, recording the
> calls and testing against some invariants.
> 
> This uncovered three additional bugs in the hotplug code:
> * hotplugging a tablet device into an aarch64 vm fails
> * hot unplugging a tablet device into an aarch64 vm left over the keyboard
> * failure to hotplug a disk with iothreads leaves the iothread behind
> 
> [...]

Applied all but 9/9, thanks! The patch 8/9 was accidentally squashed
into a single one compared to v3, so I split it up again and also
adapted a comment in vm_devices_list(). I made 2/9 actually factor out
the battle-tested existing diff helper instead of replacing it with a
new implementation as discussed off-list. In 3/9 I changed the
function and variable names, to avoid the generic 'machine', to make
it explicit that the function is intended for the basic machine types
only. Also added a follow-up to rename the variable in
windows_get_pinned_machine_version().

[1/9] tests: factor out useful commandline mocks for reuse
      commit: a70e9fbb5eb316bcc058f9e3fe69299bd9d9fc7a
[2/9] tests: factor out the diff generation
      commit: a398a2dcedb0a10e2234a6277c1b2310742542cc
[3/9] machine: factor out helper for expanding basic type
      commit: 955c6cf52fd6874224f6a2aca4925b38df2e97c0
[4/9] tests: hotplug: add initial hotplug test harness
      commit: 7b56914c501c8672076f9aa54542dbf36f32ea6c
[5/9] tests: hotplug: add some test cases
      commit: 1f52f2d67051ac36119d868cc49fc00597d8219f
[6/9] tests: hotplug: add test case for adding scsi14 on qemu 11.1
      commit: 2eefb638907a7faf7c03dd68eecdf7a6c16bc32f
[7/9] tests: hotplug: add cases for known defects
      commit: 9fe5b18562017ac8f81425055811a20aab2d06d4
[8/9] hotplug: fix hot unplugging tablet on aarch64
      commit: e4bc59136214050797fc2fc90b54de908b81fdce
[8.5/9] hotplug: fix vm_deviceplug call for 'tablet' and 'keyboard' on aarch64
      commit: 1b4fbc2cbe036270f50866a036ae774d89317e50