[PATCH v4 00/21] Workaround Windows failing to find 64bit SMBIOS entry point with SeaBIOS

[Igor Mammedov]

Changelog:
 v4:
   * rebase on top of current master due to conflict with
     new SMBIOS table 9 commits
   * add extra patch with comments about obscure legacy entries counting
 v3:
   * whitespace missed by checkpatch
   * fix idndent in QAPI
   * reorder 17/20 before 1st 'auto' can be used
   * pick up acks
 v2:
   * QAPI style fixes (Markus Armbruster <armbru@redhat.com>)
   * squash 11/19 into 10/19 (Ani Sinha <anisinha@redhat.com>)
   * split '[PATCH 09/19] smbios: build legacy mode code only for 'pc' machine'
     in 3 smaller patches, to make it more readable
       smbios: add smbios_add_usr_blob_size() helper                            
      
       smbios: rename/expose structures/bitmaps used by both legacy and modern 
code                                                                  
       smbios: build legacy mode code only for 'pc' machine
   * pick up acks

Windows (10) bootloader when running on top of SeaBIOS, fails to find
SMBIOSv3 entry point. Tracing it shows that it looks for v2 anchor markers
only and not v3. Tricking it into believing that entry point is found
lets Windows successfully locate and parse SMBIOSv3 tables. Whether it
will be fixed on Windows side is not clear so here goes a workaround.

Idea is to try build v2 tables if QEMU configuration permits,
and fallback to v3 tables otherwise. That will mask Windows issue
form majority of users.
However if VM configuration can't be described (typically large VMs)
by v2 tables, QEMU will use SMBIOSv3 and Windows will hit the issue
again. In this case complain to Microsoft and/or use UEFI instead of
SeaBIOS (requires reinstall).

Default compat setting of smbios-entry-point-type after series
for pc/q35 machines:
  * 9.0-newer: 'auto'
  * 8.1-8.2: '64'
  * 8.0-older: '32'

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/2008

Igor Mammedov (21):
  tests: smbios: make it possible to write SMBIOS only test
  tests: smbios: add test for -smbios type=11 option
  tests: smbios: add test for legacy mode CLI options
  smbios: cleanup smbios_get_tables() from legacy handling
  smbios: get rid of smbios_smp_sockets global
  smbios: get rid of smbios_legacy global
  smbios: avoid mangling user provided tables
  smbios: don't check type4 structures in legacy mode
  smbios: add smbios_add_usr_blob_size() helper
  smbios: rename/expose structures/bitmaps used by both legacy and
    modern code
  smbios: build legacy mode code only for 'pc' machine
  smbios: handle errors consistently
  smbios: get rid of global smbios_ep_type
  smbios: clear smbios_type4_count before building tables
  smbios: extend smbios-entry-point-type with 'auto' value
  smbios: in case of entry point is 'auto' try to build v2 tables 1st
  smbios: error out when building type 4 table is not possible
  tests: acpi/smbios: whitelist expected blobs
  pc/q35: set SMBIOS entry point type to 'auto' by default
  tests: acpi: update expected SSDT.dimmpxm blob
  smbios: add extra comments to smbios_get_table_legacy()

 hw/i386/fw_cfg.h                     |   3 +-
 include/hw/firmware/smbios.h         |  28 +-
 hw/arm/virt.c                        |   6 +-
 hw/i386/Kconfig                      |   1 +
 hw/i386/fw_cfg.c                     |  14 +-
 hw/i386/pc.c                         |   4 +-
 hw/i386/pc_piix.c                    |   4 +
 hw/i386/pc_q35.c                     |   3 +
 hw/loongarch/virt.c                  |   7 +-
 hw/riscv/virt.c                      |   6 +-
 hw/smbios/Kconfig                    |   2 +
 hw/smbios/meson.build                |   4 +
 hw/smbios/smbios.c                   | 483 +++++++++++----------------
 hw/smbios/smbios_legacy.c            | 192 +++++++++++
 hw/smbios/smbios_legacy_stub.c       |  15 +
 qapi/machine.json                    |   5 +-
 tests/data/acpi/q35/SSDT.dimmpxm     | Bin 1815 -> 1815 bytes
 tests/data/smbios/type11_blob        | Bin 0 -> 11 bytes
 tests/data/smbios/type11_blob.legacy | Bin 0 -> 10 bytes
 tests/qtest/bios-tables-test.c       |  81 ++++-
 20 files changed, 541 insertions(+), 317 deletions(-)
 create mode 100644 hw/smbios/smbios_legacy.c
 create mode 100644 hw/smbios/smbios_legacy_stub.c
 create mode 100644 tests/data/smbios/type11_blob
 create mode 100644 tests/data/smbios/type11_blob.legacy

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2.39.3