This series is an attempt to provide device memory hotplug support on ARM virt platform. This is based on Eric's recent works here[1] and carries some of the pc-dimm related patches dropped from his series.
The kernel support for arm64 memory hot add was added recently by Robin and hence the guest kernel should be => 5.0-rc1. NVDIM support is not included currently as we still have an unresolved issue while hot adding NVDIMM[2]. However NVDIMM cold plug patches can be included, but not done for now, for keeping it simple. This makes use of GED device to sent hotplug ACPI events to the Guest. GED code is based on Nemu. Thanks to the efforts of Samuel and Sebastien to add the hardware-reduced support to Nemu using GED device[3]. (Please shout if I got the author/signed-off wrong for those patches or missed any names). Thanks, Shameer [1] https://patchwork.kernel.org/cover/10837565/ [2] https://patchwork.kernel.org/cover/10783589/ [3] https://github.com/intel/nemu/blob/topic/virt-x86/hw/acpi/ged.c v2 --> v2 Addressed comments from Igor and Eric, -Made virt acpi device platform independent and moved to hw/acpi/generic_event_device.c -Moved ged specific code into hw/acpi/generic_event_device.c -Introduced an opt-in feature "fdt" to resolve device-memory being treated as early boot memory. -Dropped patch #1 from v2. RFC --> v2 -Use GED device instead of GPIO for ACPI hotplug events. -Removed NVDIMM support for now. -Includes dropped patches from Eric's v9 series. Eric Auger (1): hw/arm/virt: Add memory hotplug framework Samuel Ortiz (3): hw/acpi: Do not create memory hotplug method when handler is not defined hw/arm/virt: Add virtual ACPI device hw/acpi: Add ACPI Generic Event Device Support Shameer Kolothum (6): hw/acpi: Make ACPI IO address space configurable hw/arm/virt: Add ACPI support for device memory cold-plug hw/arm/virt-acpi-build: Add PC-DIMM in SRAT hw/arm/virt: Introduce opt-in feature "fdt" hw/arm/boot: Expose the PC-DIMM nodes in the DT hw/arm/virt: Init GED device and enable memory hotplug default-configs/arm-softmmu.mak | 5 + hw/acpi/Kconfig | 4 + hw/acpi/Makefile.objs | 1 + hw/acpi/generic_event_device.c | 313 +++++++++++++++++++++++++++++++++ hw/acpi/memory_hotplug.c | 34 ++-- hw/arm/boot.c | 44 +++++ hw/arm/virt-acpi-build.c | 27 +++ hw/arm/virt.c | 121 ++++++++++++- hw/i386/acpi-build.c | 3 +- include/hw/acpi/generic_event_device.h | 68 +++++++ include/hw/acpi/memory_hotplug.h | 8 +- include/hw/arm/virt.h | 5 + 12 files changed, 614 insertions(+), 19 deletions(-) create mode 100644 hw/acpi/generic_event_device.c create mode 100644 include/hw/acpi/generic_event_device.h -- 2.7.4
