[PATCH v2 00/35] acpi: refactor error prone build_header() and packed structures usage in ACPI tables

[Igor Mammedov <imammedo@redhat.com>]

v2:
  - drop test related patches, they will be sent as a separate series
  - fix bios_loader pointer initialization ordering when using TPM1.2
  - extend commit message of [1/35] and add extra comment about
    table length patching 

Highlights:
  * drop pointer arithmetic in ACPI tables code
  * use endian agnostic API
  * simplifies review of tables. /in most cases just line by line comparision with spec/

Series replaces build_header() with acpi_init_table()/acpi_table_composed()
API that hides pointer/offset arithmetic from user, to prevent
errors caused by it [1].
While doing above, it was necessary to split table header from
packed structure that was describing the table, which is
counter-productive since it still leaves packed structure drawbacks.
So that sort of forced me to rewrite tables that were composed with
help of packed structures to preferred build_append_int_noprefix() API.
In cases where refactoring to build_append_int_noprefix() was small,
it was squashed with acpi_init_table()/acpi_table_composed() patch.
Conversion reduced code size quite a bit despite me adding doc comments
for every table row.

1) commits
   bb9feea43179 x86: acpi: use offset instead of pointer when using build_header()
   4d027afeb3a9 Virt: ACPI: fix qemu assert due to re-assigned table data address

Link to repo:
   https://gitlab.com/imammedo/qemu/-/commits/acpi_build_header_refactoring_v2

CC: mst@redhat.com



Igor Mammedov (35):
  acpi: add helper routines to initialize ACPI tables
  acpi: build_rsdt: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: build_xsdt: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: build_slit: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: build_fadt: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: build_tpm2: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: acpi_build_hest: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: build_mcfg: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: build_hmat: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: nvdimm_build_nfit: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: nvdimm_build_ssdt: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: vmgenid_build_acpi: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: x86: build_dsdt: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: build_hpet: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: build_tpm_tcpa: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: arm/x86: build_srat: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: use build_append_int_noprefix() API to compose SRAT table
  acpi: build_dmar_q35: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: build_waet: use acpi_init_table()/acpi_table_composed() instead
    of build_header()
  acpi: build_amd_iommu: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: madt: arm/x86: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: x86: remove dead code
  acpi: x86: set enabled when composing _MAT entries
  acpi: x86: madt: use build_append_int_noprefix() API to compose MADT
    table
  acpi: arm/virt: madt: use build_append_int_noprefix() API to compose
    MADT table
  acpi: build_dsdt_microvm: use acpi_init_table()/acpi_table_composed()
    instead of build_header()
  acpi: arm: virt: build_dsdt: use
    acpi_init_table()/acpi_table_composed() instead of build_header()
  acpi: arm: virt: build_iort: use
    acpi_init_table()/acpi_table_composed() instead of build_header()
  acpi: arm/virt: convert build_iort() to endian agnostic
    build_append_FOO() API
  acpi: arm/virt: build_spcr: fix invalid cast
  acpi: arm/virt: build_spcr: use
    acpi_init_table()/acpi_table_composed() instead of build_header()
  acpi: arm/virt: build_gtdt: use
    acpi_init_table()/acpi_table_composed() instead of build_header()
  acpi: build_facs: use build_append_int_noprefix() API to compose table
  acpi: remove no longer used build_header()
  acpi: AcpiGenericAddress no longer used to map/access fields of MMIO,
    drop packed attribute

 include/hw/acpi/acpi-defs.h          | 528 +------------------------
 include/hw/acpi/acpi_dev_interface.h |   3 +-
 include/hw/acpi/aml-build.h          |  21 +-
 include/hw/i386/pc.h                 |   7 +-
 hw/acpi/acpi-x86-stub.c              |   3 +-
 hw/acpi/aml-build.c                  | 193 ++++++----
 hw/acpi/cpu.c                        |  17 +-
 hw/acpi/ghes.c                       |  10 +-
 hw/acpi/hmat.c                       |  14 +-
 hw/acpi/nvdimm.c                     |  64 ++--
 hw/acpi/pci.c                        |  18 +-
 hw/acpi/vmgenid.c                    |  16 +-
 hw/arm/virt-acpi-build.c             | 550 +++++++++++++++------------
 hw/i386/acpi-build.c                 | 284 ++++++++------
 hw/i386/acpi-common.c                | 158 ++++----
 hw/i386/acpi-microvm.c               |  13 +-
 16 files changed, 750 insertions(+), 1149 deletions(-)

-- 
2.27.0