[Qemu-devel] [PATCH v4 00/42] ACPI refactoring: replace template patching with C AML API

[Igor Mammedov]

changes since v3:
 * drop acpi_def_block() for now
 * exclude PCI refactoring
 * minor ammends as requested on list
 * not much tested, but XP boots.

changes since v2:
  * rename acpi prefixes in API to aml
  * reverse conversion order from bottom->top to top->bottom
  * introduce internal Aml garbage collector and 2 API functions
    to initialize and cleanup it up
  * replace acpi_argX() helpers with a single aml_arg(X) helper
    do the same for acpi_localX() helpers.
  * add 3 internal allocators, for allocating dummy Aml struct
    for helpers aml_alloc(), aml_opcode(OPCODE) for simple Aml
    elements and aml_bundle(opcode, kind) for complex elements
    that require post-processing after element has been composed
  * amend spec references to ACPI 1.0b and later if AML element
    was introduced later
  * various codestyle fixes
  * rebase on top of PCI tree

changes since RFC:
  * conflicts with vmgenid (broken) patches, so it's not based on PCI tree
  * rebased on top of today's master +
    [PATCH v5 0/5] pc: acpi: various fixes and cleanups +
    some patches from PCI tree that above series depends on
  * small cleanups
  * droped [42/47] acpi: make tables linker-loader available to other targets
    since Michael has a cleaner similar patch(es) in PCI tree,
    so reuse them (not included in here)
  * move SMC device from DSDT to SSDT and create it only when
    applesmc device is present.


This series refactors SSDT runtime composing and gets rid of:
    * patching AML templates, with related pointer arithmetic magic
    * manual AML composition, i.e. creating AML terms practically
      byte by byte
    * using AML templates for SSDT creation, reducing dependency on IASL.
      as result of above, QEMU source tree doesn't have to carry
      'binary' template blobs that used to be part of SSDT.
    * hand-crafted PCI0._CRSes for pc/q35 machines in DSDT with
      manual hole punching of reserved resources
and adds following:
    * introduces ASL like API for creating AML objects using ASL
      like constructs/terms. API: 
          * provides a necessary minimum set of terms/helpers to
            replace currently used SSDT templates.
          * simplifies AML composition and keeps track of AML
            object contexts, transparently managing their 
            (de)allocation and merging into parent context,
            making composition of SSDT 'almost' like writing
            native ASL definition of the table.
          * hides pointer arithmetic from user when composing
            SSDT.
    * dynamically creates unified PCI0._CRS in SSDT for pc/q35
      machines allowing to reserve resources at runtime vs
      current compile time
    * while adding new API, make it target independed CONFIG_ACPI
      and also make some other utilities for composing ACPI tables
      target independed (i.e. utils on which API depends) so that
      they could be reused for ARM target later without moving
      stuff around uncessarily.
    * trims SSDT by not creating objects that are not present
      (S[34] Package if disabled, pvpanic, applesmc)

As result of replacing AML templates with ASL API, codebase
reduces on ~1900LOC even with net addition of API 1050LOC counted in.


Tested with XPsp3, WS2012R2, RHEL6/7 guests. 

Git tree for playing with:
    https://github.com/imammedo/qemu/commits/ASL_API_v4



Igor Mammedov (42):
  acpi: introduce AML composer aml_append()
  acpi: add aml_scope() term
  pc: acpi-build: use aml_scope() for \_SB scope
  acpi: add aml_device() term
  acpi: add aml_method() term
  acpi: add aml_if() term
  acpi: add aml_name() & aml_name_decl() term
  acpi: add aml_int() term
  acpi: add aml_return() term
  acpi: add aml_arg() term
  acpi: add aml_store() term
  acpi: add aml_and() term
  acpi: add aml_notify() term
  acpi: add aml_call1(), aml_call2(), aml_call3(), aml_call4() helpers
  acpi: add aml_package() term
  pc: acpi-build: generate _S[345] packages dynamically
  acpi: add aml_buffer() term
  acpi: add aml_resource_template() helper
  acpi: add aml_io() helper
  acpi: include PkgLength size only when requested
  acpi: add aml_operation_region() term
  acpi: add aml_field() & aml_named_field() terms
  acpi: add aml_local() term
  acpi: add aml_string() term
  pc: acpi-build: generate pvpanic device description dynamically
  acpi: add aml_varpackage() term
  acpi: add aml_equal() term
  acpi: add aml_processor() term
  acpi: add aml_eisaid() term
  pc: acpi-build: drop template patching and CPU hotplug objects
    dynamically
  pc: acpi-build: create CPU hotplug IO region dynamically
  acpi: add aml_reserved_field() term
  pc: acpi-build: drop template patching and memory hotplug objects
    dynamically
  pc: acpi-build: create memory hotplug IO region dynamically
  acpi: add aml_word_bus_number(), aml_word_io(), aml_dword_memory(),
    aml_qword_memory() terms
  pc: pcihp: expose MMIO base and len as properties
  pc: acpi-build: reserve PCIHP MMIO resources
  pc: acpi-build: create PCI0._CRS dynamically
  pc: acpi-build: drop remaining ssdt_misc template
  acpi: add acpi_irq_no_flags() term
  pc: export applesmc IO port/len
  pc: acpi-build: drop template patching and create Device(SMC)
    dynamically

 hw/acpi/aml-build.c               | 681 ++++++++++++++++++++++++++++++++++++--
 hw/acpi/pcihp.c                   |  18 +-
 hw/acpi/piix4.c                   |   2 +-
 hw/i386/Makefile.objs             |   5 +-
 hw/i386/acpi-build.c              | 503 ++++++++++++++++++----------
 hw/i386/acpi-dsdt-cpu-hotplug.dsl |  17 +-
 hw/i386/acpi-dsdt-isa.dsl         |  11 -
 hw/i386/acpi-dsdt-mem-hotplug.dsl |  36 +-
 hw/i386/acpi-dsdt-pci-crs.dsl     |  92 -----
 hw/i386/acpi-dsdt.dsl             |  46 ---
 hw/i386/q35-acpi-dsdt.dsl         |  19 --
 hw/i386/ssdt-mem.dsl              |  77 -----
 hw/i386/ssdt-misc.dsl             | 122 -------
 hw/i386/ssdt-proc.dsl             |  63 ----
 hw/misc/applesmc.c                |   5 +-
 include/hw/acpi/aml-build.h       | 190 ++++++++++-
 include/hw/acpi/pc-hotplug.h      |   1 +
 include/hw/acpi/pcihp.h           |   7 +-
 include/hw/isa/isa.h              |  11 +-
 19 files changed, 1205 insertions(+), 701 deletions(-)
 delete mode 100644 hw/i386/acpi-dsdt-pci-crs.dsl
 delete mode 100644 hw/i386/ssdt-mem.dsl
 delete mode 100644 hw/i386/ssdt-misc.dsl
 delete mode 100644 hw/i386/ssdt-proc.dsl

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1.8.3.1