Re: [PATCH-for-4.2 v11 00/11] ARM virt: ACPI memory hotplug support

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Sep 18, 2019 at 02:06:22PM +0100, Shameer Kolothum wrote:
> 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.
> 
> Note:
> Attempted adding dimm_pxm test case to bios-tables-test for arm/virt.
> But noticed the issue decribed here[5]. This is under investigation 
> now.
> 
> Thanks,
> Shameer


Which tree is this going through? Mine or ARM?


> [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
> [5] https://www.mail-archive.com/qemu-devel@nongnu.org/msg632651.html
> 
> v10 --> v11
> -Changed patch #10 to update bios-tables-test-allowed-diff.h with a
>  list of expected ACPI tables.
> -GED document changed to rst format (patch #9)
> -Addressed comments from Igor (patch #3 & #5)
> -Igor's R-by to #7, #8 & #11.
> 
> v9 --> v10
>  -Fix for "make check" failure on x86_64(Patch #1).
>  -Minor updates based on Eric's comments.
>  -Dropped patch "hw/arm/virt: Add 4.2 machine type" as this is already
>   in master now.
>  -Added R-by tags by Eric.
> 
> v8 --> v9
>  -Changes related to GED being a TYPE_SYS_BUS_DEVICE now.
>  -Re-arranged patches 8 and 9.
>  -Added GED ABI documentation(patch #10).
>  -Added numamem and memhp tests to arm/virt(#11 and #12)
>  -Dropped few R-by tags as code has changed a bit.
>  -Please see Individual patch history for details.
>  
> v7 --> v8
>  -Addressed comments from Igor.Please see individual patches.
>  -Updated bios-tables-test-allowed-diff.h to avoid "make check"
>   failure (patch #6) and dropped patch #10
>  -Added Igor's R-by to patches 4 & 5.
>  -Dropped Erics's R-by from patch #9 for now.
> 
> 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 (1):
>   hw/arm/virt: Add memory hotplug framework
> 
> 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 (8):
>   hw/acpi: Make ACPI IO address space configurable
>   hw/arm/virt: Enable device memory cold/hot plug with ACPI boot
>   hw/arm/virt-acpi-build: Add PC-DIMM in SRAT
>   hw/arm: Factor out powerdown notifier from GPIO
>   hw/arm: Use GED for system_powerdown event
>   docs/specs: Add ACPI GED documentation
>   tests: Update ACPI tables list for upcoming arm/virt tests
>   tests: Add bios tests to arm/virt
> 
>  docs/specs/acpi_hw_reduced_hotplug.rst |  70 ++++++
>  docs/specs/index.rst                   |   1 +
>  hw/acpi/Kconfig                        |   4 +
>  hw/acpi/Makefile.objs                  |   1 +
>  hw/acpi/generic_event_device.c         | 311 +++++++++++++++++++++++++
>  hw/acpi/memory_hotplug.c               |  43 ++--
>  hw/arm/Kconfig                         |   4 +
>  hw/arm/virt-acpi-build.c               |  35 ++-
>  hw/arm/virt.c                          | 124 +++++++++-
>  hw/i386/acpi-build.c                   |   7 +-
>  hw/i386/pc.c                           |   3 +
>  include/hw/acpi/acpi_dev_interface.h   |   1 +
>  include/hw/acpi/generic_event_device.h | 103 ++++++++
>  include/hw/acpi/memory_hotplug.h       |   9 +-
>  include/hw/arm/virt.h                  |   5 +
>  include/hw/i386/pc.h                   |   3 +
>  tests/bios-tables-test-allowed-diff.h  |  16 ++
>  tests/bios-tables-test.c               |  49 ++++
>  18 files changed, 748 insertions(+), 41 deletions(-)
>  create mode 100644 docs/specs/acpi_hw_reduced_hotplug.rst
>  create mode 100644 hw/acpi/generic_event_device.c
>  create mode 100644 include/hw/acpi/generic_event_device.h
> 
> -- 
> 2.17.1
>