Re: [PATCH for-9.0] docs/about: Mark the iaspc machine type as deprecated

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Il mer 27 mar 2024, 14:09 Igor Mammedov <imammedo@xxxxxxxxxx> ha scritto:
It's question of whether we are willing to do unthinkable,
i.e. to break QEMU <-> guest ABI for isapc case by removing
corresponding fwcfg entries.

It's not unthinkable since it's unversioned.

we are loosing a chance to cleanup
QEMU code base touching following

    m->option_rom_has_mr = true;                      
    m->rom_file_has_mr = false;                           
    pcmc->pci_enabled = false;                            
    pcmc->has_acpi_build = false;                      
    pcmc->smbios_defaults = false;                    
    pcmc->gigabyte_align = false;                            pcmc->smbios_legacy_mode = true;                  pcmc->has_reserved_memory = false;

Some of these can go away, for the others probably we can think of making isapc a direct subclass of X86MachineState.

I would rather keep it because it's the only way to test userspace interrupt injection in KVM.

Paolo

they are all marginal but in shared code, and removing them
makes code a bit more easier to follow (especially when it
comes to memory layout).

> With regards,
> Daniel

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