[PATCH 00/86] refactor main RAM allocation to use hostmem backend

[Igor Mammedov]

Series removes ad hoc RAM allocation API (memory_region_allocate_system_memory)
and consolidates it around hostmem backend. It allows to
 * resolve conflicts between global -mem-prealloc and hostmem's "policy" option
   fixing premature allocation before binding policy is applied
 * simplify complicated memory allocation routines which had to deal with 2 ways
   to allocate RAM.
 * it allows to reuse hostmem backends of a choice for main RAM without adding
   extra CLI options to duplicate hostmem features.
   Recent case was -mem-shared, to enable vhost-user on targets that don't
   support hostmem backends [1] (ex: s390)
 * move RAM allocation from individual boards into generic machine code and
   provide them with prepared MemoryRegion.
 * clean up deprecated NUMA features which were tied to the old API (see 
patches)
    - "numa: remove deprecated -mem-path fallback to anonymous RAM"
    - "numa: remove deprecated implicit RAM distribution between nodes"
    - "forbid '-numa node,mem' for 5.0 and newer machine types"

Conversion introduces a new machine.ram-memdev property and wrapper code that
aliases global -mem-path and -mem-alloc into automatically created hostmem
backend properties (provided ram-memdev was not set explicitly by user).
And then follows bulk of trivial patches that incrementally convert individual
boards to using machine.ram-memdev provided MemoryRegion.

Board conversion typically involves:
 * providing MachineClass::default_ram_size and MachineClass::default_ram_id
   so generic code could create default backend if user didn't explicitly 
provide
   ram-memdev or -m options
 * dropping memory_region_allocate_system_memory() call
 * using covinience MachineState::ram MemoryRegion, which points to MemoryRegion
   allocated by ram-memdev
On top of that for some boards:
 * added missing ram_size checks (typically it were boards with fixed ram size)
 * ram_size fixups were replaced by checks and hard errors, forcing user to
   provide correct "-m" values instead of ignoring it and continuing running.
   
After all boards are converted the old API is removed and memory allocation
routines are cleaned up.

git tree for testing:
  https://github.com/imammedo/qemu convert_main_ram_to_memdev_v1

Igor Mammedov (86):
  numa: remove not needed check
  numa: properly check if numa is supported
  numa: remove deprecated -mem-path fallback to anonymous RAM
  machine: introduce ram-memdev property
  machine: alias -mem-path and -mem-prealloc into memory-foo backend
  machine: introduce convenience MachineState::ram
  initialize MachineState::ram in NUMA case
  alpha:dp264: use memdev for RAM
  arm:aspeed: convert valid RAM sizes to data
  arm:aspeed: actually check RAM size
  hw:aspeed: drop warning and bogus ram_size fixup
  arm:aspeed: use memdev for RAM
  arm:collie: use memdev for RAM
  arm:cubieboard: use memdev for RAM
  arm:digic_boards: use memdev for RAM
  arm:highbank: use memdev for RAM
  arm:imx25_pdk: drop RAM size fixup
  arm:imx25_pdk: use memdev for RAM
  arm:integratorcp: use memdev for RAM
  arm:kzm: drop RAM size fixup
  arm:kzm: use memdev for RAM
  arm:mcimx6ul-evk: use memdev for RAM
  arm:mcimx7d-sabre: use memdev for RAM
  arm:mps2-tz: use memdev for RAM
  arm:mps2: use memdev for RAM
  arm:musicpal: use memdev for RAM
  arm:nseries: use memdev for RAM
  arm:omap_sx1: use memdev for RAM
  arm:palm: use memdev for RAM
  arm:raspi: use memdev for RAM
  arm:sabrelite: use memdev for RAM
  arm:sbsa-ref: use memdev for RAM
  arm:versatilepb: use memdev for RAM
  arm:vexpress: use memdev for RAM
  arm:virt: use memdev for RAM
  arm:xilinx_zynq: drop RAM size fixup
  arm:xilinx_zynq: use memdev for RAM
  arm:xlnx-versal-virt: use memdev for RAM
  arm:xlnx-zcu102: use memdev for RAM
  s390x:s390-virtio-ccw: use memdev for RAM
  null-machine: use memdev for RAM
  cris:axis_dev88: use memdev for RAM
  hppa: drop RAM size fixup
  hppa: use memdev for RAM
  x86:microvm: use memdev for RAM
  x86:pc: use memdev for RAM
  lm32:lm32_boards: use memdev for RAM
  lm32:milkymist: use memdev for RAM
  m68k:an5206: use memdev for RAM
  m68k:mcf5208: use memdev for RAM
  m68k:next-cube: use memdev for RAM
  mips:boston-cube: use memdev for RAM
  mips:mips_fulong2e: drop RAM size fixup
  mips:mips_fulong2e: use memdev for RAM
  mips:mips_jazz: use memdev for RAM
  mips:mips_malta: use memdev for RAM
  mips:mips_mipssim: use memdev for RAM
  mips:mips_r4k: use memdev for RAM
  ppc:e500: drop RAM size fixup
  ppc:e500: use memdev for RAM
  ppc:mac_newworld: use memdev for RAM
  ppc:mac_oldworld: use memdev for RAM
  ppc:pnv: use memdev for RAM
  ppc:ppc405_boards: add RAM size checks
  ppc:ppc405_boards: use memdev for RAM
  ppc:ppc440_bamboo/sam460ex: drop RAM size fixup
  ppc:ppc440_bamboo/sam460ex: use memdev for RAM
  ppc:prep: use memdev for RAM
  ppc:spapr: use memdev for RAM
  ppc:virtex_ml507: remove unused arguments
  ppc:virtex_ml507: use memdev for RAM
  sparc:leon3: use memdev for RAM
  sparc:sun4m: use memdev for RAM
  sparc:niagara: use memdev for RAM
  remove no longer used memory_region_allocate_system_memory()
  post conversion default_ram_id cleanup
  exec: cleanup qemu_minrampagesize()/qemu_maxrampagesize()
  exec: drop bogus mem_path from qemu_ram_alloc_from_fd()
  make mem_path local variable
  hostmem: introduce "prealloc-threads" property
  hostmem: fix strict bind policy
  numa: forbid '-numa node,mem' for 5.0 and newer machine types
  tests:numa-test: make top level args dynamic and g_autofree(cli)
    cleanups
  tests:numa-test: use explicit memdev to specify node RAM
  numa: make exit() usage consistent
  numa: remove deprecated implicit RAM distribution between nodes

 hw/alpha/alpha_sys.h          |   2 +-
 include/hw/boards.h           |  51 ++++---------
 include/hw/misc/aspeed_sdmc.h |   2 +
 include/hw/ppc/ppc4xx.h       |   9 +--
 include/sysemu/hostmem.h      |  20 ++++-
 include/sysemu/numa.h         |   5 +-
 include/sysemu/sysemu.h       |   2 -
 backends/hostmem-file.c       |   8 --
 backends/hostmem-memfd.c      |   1 -
 backends/hostmem-ram.c        |   2 -
 backends/hostmem.c            |  53 ++++++++++----
 exec.c                        |  66 ++---------------
 hw/alpha/dp264.c              |   2 +-
 hw/alpha/typhoon.c            |   8 +-
 hw/arm/aspeed.c               |  13 +---
 hw/arm/collie.c               |  15 ++--
 hw/arm/cubieboard.c           |  25 ++-----
 hw/arm/digic_boards.c         |  35 +++++----
 hw/arm/highbank.c             |  10 +--
 hw/arm/imx25_pdk.c            |  13 ++--
 hw/arm/integratorcp.c         |   9 +--
 hw/arm/kzm.c                  |  13 ++--
 hw/arm/mcimx6ul-evk.c         |  25 +++----
 hw/arm/mcimx7d-sabre.c        |  25 +++----
 hw/arm/mps2-tz.c              |  13 +++-
 hw/arm/mps2.c                 |  13 +++-
 hw/arm/musicpal.c             |  16 ++--
 hw/arm/nseries.c              |  31 ++++----
 hw/arm/omap_sx1.c             |  18 +++--
 hw/arm/palm.c                 |  18 +++--
 hw/arm/raspi.c                |  32 +++-----
 hw/arm/sabrelite.c            |  23 ++----
 hw/arm/sbsa-ref.c             |   8 +-
 hw/arm/versatilepb.c          |   7 +-
 hw/arm/vexpress.c             |  14 ++--
 hw/arm/virt.c                 |   9 +--
 hw/arm/xilinx_zynq.c          |  20 +++--
 hw/arm/xlnx-versal-virt.c     |   7 +-
 hw/arm/xlnx-zcu102.c          |   7 +-
 hw/core/machine.c             |  41 +++++++++--
 hw/core/null-machine.c        |   7 +-
 hw/core/numa.c                | 167 +++++++++---------------------------------
 hw/cris/axis_dev88.c          |   8 +-
 hw/hppa/machine.c             |  10 +--
 hw/i386/microvm.c             |  12 ++-
 hw/i386/pc.c                  |  20 +++--
 hw/i386/pc_piix.c             |   2 +-
 hw/i386/pc_q35.c              |   2 +-
 hw/lm32/lm32_boards.c         |  36 +++++----
 hw/lm32/milkymist.c           |  19 +++--
 hw/m68k/an5206.c              |   5 +-
 hw/m68k/mcf5208.c             |   5 +-
 hw/m68k/next-cube.c           |   5 +-
 hw/mips/boston.c              |  11 ++-
 hw/mips/mips_fulong2e.c       |  15 ++--
 hw/mips/mips_jazz.c           |   7 +-
 hw/mips/mips_malta.c          |  10 +--
 hw/mips/mips_mipssim.c        |   9 +--
 hw/mips/mips_r4k.c            |  12 +--
 hw/misc/aspeed_sdmc.c         | 112 +++++++++++-----------------
 hw/ppc/e500.c                 |  17 ++---
 hw/ppc/e500plat.c             |   1 +
 hw/ppc/mac_newworld.c         |   6 +-
 hw/ppc/mac_oldworld.c         |   6 +-
 hw/ppc/mpc8544ds.c            |   1 +
 hw/ppc/pnv.c                  |   8 +-
 hw/ppc/ppc405_boards.c        |  45 +++++++-----
 hw/ppc/ppc440_bamboo.c        |  12 ++-
 hw/ppc/ppc4xx_devs.c          |  30 ++++----
 hw/ppc/prep.c                 |  15 ++--
 hw/ppc/sam460ex.c             |   6 +-
 hw/ppc/spapr.c                |  17 +----
 hw/ppc/virtex_ml507.c         |  18 ++---
 hw/s390x/s390-virtio-ccw.c    |   7 +-
 hw/sparc/leon3.c              |   6 +-
 hw/sparc/sun4m.c              |  73 +++++++++---------
 hw/sparc64/niagara.c          |   7 +-
 qemu-deprecated.texi          |  33 ---------
 qemu-options.hx               |  20 ++---
 tests/numa-test.c             |  90 +++++++++++++----------
 vl.c                          |  37 +++++++++-
 81 files changed, 713 insertions(+), 907 deletions(-)

-- 
2.7.4