This is on top of patchset generating ACPI tables in qemu. Please review and consider for 1.7.
Changes from v2: - split new code out to a separate file: acpi/pcihp.c this way we can reuse it for q35 later - rebased on top of the latest acpi-build patchset Changes from v1: - fixed some bugs - fixed migration and cross version compatibility - rebased to latest bits This adds support for device hotplug behind pci bridges, by generating ACPI tables describing the current hierarchy. Bridge devices themselves need to be pre-configured on qemu command line. How to use: Describe buses on command line. E.g.: -device pci-bridge,id=bar,chassis_nr=1 -device virtio-net,netdev=bur,addr=0x1,id=far,bus=bar use monitor command for hotplug: device_del far We don't currently use QOM properties to generate this info since: - info about hotpluggability of devices is lacking - we need to list all devices and buses in a predictable order For now, add a pci core function to do the above predictable order walk. This is on top of acpi patchset posted previously. with a small patch adding a core function to walk all pci buses, on top. Can also be found in my git tree git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git acpi-bridges Portability: - Non x86 (or any Linux) platforms don't need any of this code. They can keep happily using SHPC the way they always did. Things to note: - Extensive use of glib completely removes pointer math: we use g_array_append_vals exclusively. - As was the case previously, systems that lack working iasl are detected at configure time, pre-generated hex files in source tree are used in this case. This addresses the concern with iasl/big-endian systems. - Cross version migration: when running with -M 1.6 and older, new hotplug functionality is unavailable. All ACPI table generation is disabled. We present FW_CFG interface compatible with 1.6. Michael S. Tsirkin (4): pci: add pci_for_each_bus_depth_first pcihp: generalization of piix4 acpi piix4: add acpi pci hotplug support acpi-build: enable hotplug for PCI bridges include/hw/acpi/pcihp.h | 72 ++++++++++ include/hw/i386/pc.h | 5 + include/hw/pci/pci.h | 14 ++ hw/acpi/pcihp.c | 312 +++++++++++++++++++++++++++++++++++++++++++ hw/acpi/piix4.c | 75 +++++++++-- hw/i386/acpi-build.c | 346 ++++++++++++++++++++++++++++++++++++++---------- hw/pci/pci.c | 28 ++++ hw/acpi/Makefile.objs | 2 +- hw/i386/acpi-dsdt.dsl | 34 +++-- hw/i386/ssdt-pcihp.dsl | 11 +- 10 files changed, 794 insertions(+), 105 deletions(-) create mode 100644 include/hw/acpi/pcihp.h create mode 100644 hw/acpi/pcihp.c -- MST