The MADT table structure has been updated in commit 37f33084ed2e                 
("acpi: arm/virt: madt: use build_append_int_noprefix() API to compose MADT table")
to include the 5.2.12.18 GIC ITS Structure and so table's revision also needs to 
be updated. MADT and the FADT tables from the same spec need to be in sync and in
this case also the FADT needs to be updated.                                     
                                                                                 
Revision 6.0 of the ACPI FADT table introduces the field "Hypervisor Vendor      
Identity" which is missing and must be included. Patch 2/4 includes a
suggestion for the value of this field.

Ref: https://uefi.org/sites/default/files/resources/ACPI_6_0_Errata_A.PDF        

Changelog:

v2:
    patch 2/4:
    fix expression that checks for the revision number (Ani Sinha)
    use "QEMU" as the Hypervisor Vendor ID [1] (Ani Sinha)

    patch 3/4:
    add Reviewed-by tag from Ani Sinha <ani@anisinha.ca>
    

v1: https://lists.nongnu.org/archive/html/qemu-devel/2022-10/msg00910.html

Open to discussion, your comments, thoughts and suggestions are very welcome.    
Thanks in advance.                                                               
Miguel

[1]: https://lists.nongnu.org/archive/html/qemu-devel/2022-10/msg00989.html

Miguel Luis (4):
  tests/acpi: virt: allow acpi MADT and FADT changes
  acpi: fadt: support revision 6.0 of the ACPI specification
  acpi: arm/virt: madt: bump to revision 4 accordingly to ACPI 6.0
    Errata A
  tests/acpi: virt: update ACPI MADT and FADT binaries

 hw/acpi/aml-build.c               |  13 ++++++++++---
 hw/arm/virt-acpi-build.c          |  26 ++++++++++++--------------
 tests/data/acpi/virt/APIC         | Bin 168 -> 172 bytes
 tests/data/acpi/virt/APIC.memhp   | Bin 168 -> 172 bytes
 tests/data/acpi/virt/APIC.numamem | Bin 168 -> 172 bytes
 tests/data/acpi/virt/FACP         | Bin 268 -> 276 bytes
 tests/data/acpi/virt/FACP.memhp   | Bin 268 -> 276 bytes
 tests/data/acpi/virt/FACP.numamem | Bin 268 -> 276 bytes
 8 files changed, 22 insertions(+), 17 deletions(-)

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2.37.3