> On 26 Mar 2024, at 18:21, Igor Mammedov <imammedo@xxxxxxxxxx> wrote:
>
> ISAPC machine was introduced 25 years ago and it's a lot of time since
> such machine was around with real ISA only PC hardware practically defunct.
> Also it's slowly bit-rots (for example: I was able to boot RHEL6 on RHEL9 host
> in only TCG mode, while in KVM mode it hung in the middle of boot)
>
> Rather than spending time on fixing 'the oldest' no longer tested machine type,
> deprecate it so we can clean up QEMU code from legacy fixups and hopefully
> make it easier to follow.
>
> Folks who have to use ancient guest that requires ISAPC can still
> use older QEMU to play with it.
>
> Signed-off-by: Igor Mammedov <imammedo@xxxxxxxxxx>
Reviewed-by: Ani Sinha <anisinha@xxxxxxxxxx>
> ---
> docs/about/deprecated.rst | 7 +++++++
> hw/i386/pc_piix.c | 1 +
> 2 files changed, 8 insertions(+)
>
> diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
> index 7b548519b5..5708296991 100644
> --- a/docs/about/deprecated.rst
> +++ b/docs/about/deprecated.rst
> @@ -226,6 +226,13 @@ These old machine types are quite neglected nowadays and thus might have
> various pitfalls with regards to live migration. Use a newer machine type
> instead.
>
> +``isapc`` (since 9.0)
> +'''''''''''''''''''''''''''''''''''''''''''''''''''''
> +
> +These old machine type are quite neglected nowadays and thus might have
> +various pitfalls with regards to live migration. Use a newer machine type
> +instead.
> +
> Nios II ``10m50-ghrd`` and ``nios2-generic-nommu`` machines (since 8.2)
> '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
>
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index 18ba076609..96f72384dd 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -921,6 +921,7 @@ static void isapc_machine_options(MachineClass *m)
> m->default_nic = "ne2k_isa";
> m->default_cpu_type = X86_CPU_TYPE_NAME("486");
> m->no_parallel = !module_object_class_by_name(TYPE_ISA_PARALLEL);
> + m->deprecation_reason = "old and unattended - use a newer version instead";
> }
>
> DEFINE_PC_MACHINE(isapc, "isapc", pc_init_isa,
> --
> 2.43.0
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