Re: [Qemu-devel] [PATCH] isapc: Remove unnecessary migration compatibility code

[Igor Mammedov <imammedo@redhat.com>]

On Fri,  6 Oct 2017 10:25:02 -0300
Eduardo Habkost <ehabkost@redhat.com> wrote:

> We don't touch isapc when we change guest ABI and add new entries
> to PC_COMPAT_* or new PCMachineClass compat flags.  This means
> isapc never guaranteed guest ABI and cross-QEMU-version live
> migration compatibility.  There's no point in keeping code for
> kvm-pv-eoi and APIC ID compatibility in pc_init_isa().
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  hw/i386/pc_piix.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index 9ff79b1fd9..31646e63c4 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -378,8 +378,6 @@ static void pc_compat_0_13(MachineState *machine)
>  
>  static void pc_init_isa(MachineState *machine)
>  {
> -    x86_cpu_change_kvm_default("kvm-pv-eoi", NULL);
> -    enable_compat_apic_id_mode();
>      pc_init1(machine, TYPE_I440FX_PCI_HOST_BRIDGE, TYPE_I440FX_PCI_DEVICE);
>  }
>