Re: [Qemu-devel] [RESEND PATCH v4 00/10] QEmu memory hot unplug support.

[Igor Mammedov]

On Wed, 5 Nov 2014 13:49:45 +0800
Tang Chen <address@hidden> wrote:

> This patch-set implements memory hot-remove for QEmu. 
> 
> Rebased on Igor's asynchronize hotplug framework (qemu v2.1.2, the latest).
As I've wrote before, there were hot-unplug patches merged last month,
see for reference 
http://lists.nongnu.org/archive/html/qemu-devel/2014-09/msg05195.html
and this series could benefit from them.

So please look take in account not addressed yet comments on V3
and rebase on current master instead of stable 2.1.2.

> 
> Approach: QEmu sets GPE status bit, then triggers SCI to notify guest os.
> Guest os checks device status, and free memory resource if possible,
> then generate OST.
> 
> NOTE: In this version, memory hot-remove is independent from _OST, 
>       following Igor's comments. Will implement _OST for memory hot-remove
>       soon if this part is OK.
> 
> Change log v3 -> v4 (RESEND):
> 1. Add new patch 1 ~ 4, fix some small problems in coding.
> 2. In patch 9, make memory hot-remove independent from _OST.
> 3. In patch 9, add comment for is_removing flag to document.
> 4. In patch 10, use macro instead of number.
> 5. Remove original patch 8 and 12 to coincident with asynchronize
>    hotplug framework.
> 
> Hu Tao (4):
>   acpi, piix4: Add memory hot unplug support for piix4.
>   pc: Add memory hot unplug support for pc machine.
>   pc-dimm: Add pc_dimm_unrealize() for memory hot unplug support.
>   pc, acpi bios: Add memory hot unplug interface.
> 
> Tang Chen (6):
>   acpi, mem-hotplug: Use PC_DIMM_SLOT_PROP in acpi_memory_plug_cb().
>   acpi, mem-hotplug: Add acpi_memory_get_slot_status_descriptor() to get
>     MemStatus.
>   acpi, mem-hotplug: Add acpi_memory_hotplug_sci() to rise sci for
>     memory hotplug.
>   acpi, mem-hotplug: Add acpi_memory_unplug_cb() to implement memory
>     unplug.
>   acpi, ich9: Add memory hot unplug support for ich9.
>   acpi: Add hardware implementation for memory hot unplug.
> 
>  docs/specs/acpi_mem_hotplug.txt  |  8 +++--
>  hw/acpi/ich9.c                   | 12 +++++++
>  hw/acpi/memory_hotplug.c         | 71 
> +++++++++++++++++++++++++++++++---------
>  hw/acpi/piix4.c                  |  6 +++-
>  hw/i386/pc.c                     | 31 ++++++++++++++++++
>  hw/i386/ssdt-mem.dsl             |  5 +++
>  hw/i386/ssdt-misc.dsl            | 13 +++++++-
>  hw/isa/lpc_ich9.c                |  5 +--
>  hw/mem/pc-dimm.c                 | 10 ++++++
>  include/hw/acpi/ich9.h           |  2 ++
>  include/hw/acpi/memory_hotplug.h |  3 ++
>  include/hw/acpi/pc-hotplug.h     |  2 ++
>  12 files changed, 146 insertions(+), 22 deletions(-)
>