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). This is sanity tested on a HiSilicon ARM64 platform and appreciate any further testing. 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 [4] http://lists.infradead.org/pipermail/linux-arm-kernel/2019-May/651763.html v6 --> v7 - Added 4.2 machine support and restricted GED creation for < 4.2 This is to address the migration test fail reported by Eric. - Included "tests: Update DSDT ACPI table.." patch(#10) from Eric to fix the "make check" bios-tables-test failure. v5 --> v6 -Addressed comments from Eric. -Added R-by from Eric and Igor. v4 --> v5 -Removed gsi/ged-irq routing in virt. -Added Migration support. -Dropped support for DT coldplug case based on the discussions here[4] -Added system_powerdown support through GED. v3 --> v4 Addressed comments from Igor and Eric, -Renamed "virt-acpi" to "acpi-ged". -Changed ged device parent to TYPE_DEVICE. -Introduced DT memory node property "hotpluggable" to resolve device memory being treated as early boot memory issue(patch #7). -Combined patches #3 and #9 from v3 into #3. v2 --> v3 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 (2): hw/arm/virt: Add memory hotplug framework tests: Update DSDT ACPI table for arm/virt board with PCDIMM related changes Samuel Ortiz (2): hw/acpi: Do not create memory hotplug method when handler is not defined hw/acpi: Add ACPI Generic Event Device Support Shameer Kolothum (6): hw/acpi: Make ACPI IO address space configurable hw/arm/virt: Add 4.2 machine type hw/arm/virt: Enable device memory cold/hot plug with ACPI boot hw/arm/virt-acpi-build: Add PC-DIMM in SRAT hw/acpi: Add system power down support to GED hw/arm: Use GED for system_powerdown event hw/acpi/Kconfig | 4 + hw/acpi/Makefile.objs | 1 + hw/acpi/generic_event_device.c | 352 +++++++++++++++++++++++++ hw/acpi/memory_hotplug.c | 35 +-- hw/arm/Kconfig | 4 + hw/arm/virt-acpi-build.c | 58 ++-- hw/arm/virt.c | 99 ++++++- hw/core/machine.c | 3 + hw/i386/acpi-build.c | 3 +- include/hw/acpi/generic_event_device.h | 106 ++++++++ include/hw/acpi/memory_hotplug.h | 9 +- include/hw/arm/virt.h | 4 + include/hw/boards.h | 3 + tests/data/acpi/virt/DSDT | Bin 18476 -> 18493 bytes 14 files changed, 625 insertions(+), 56 deletions(-) create mode 100644 hw/acpi/generic_event_device.c create mode 100644 include/hw/acpi/generic_event_device.h -- 2.17.1