Christian Brauner
6bfa7aa050
On PCIe machine types (q35, virt), QMP device_add is always hotplug — even with vCPUs stopped. The root PCIe bus (pcie.0) does not support hotplugging; only pcie-root-port bridges do. Pre-allocate enough root ports in the QEMU config file for all devices that will be set up via QMP, plus 10 spare ports for future runtime hotplug. Add ARCHITECTURE_NEEDS_PCIE_ROOT_PORTS macro to guard PCIe-specific setup on x86, ARM, RISC-V, and LoongArch (the architectures whose QEMU machine type is q35 or virt). Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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