Re: [Qemu-devel] [PATCH] q35: Remove old machine versions

[John Snow <jsnow@redhat.com>]

On 08/19/2015 02:55 AM, Dr. David Alan Gilbert wrote:
> * Eduardo Habkost (ehabkost@redhat.com) wrote:
>> Migration with q35 was not possible before commit
>> 04329029a8c539eb5f75dcb6d8b016f0c53a031a, because q35 unconditionally creates
>> an ich9-ahci device, that was marked as unmigratable. So all q35 machines
>> before pc-q35-2.4 were unmigratable, and there's no point in keeping
>> compatibility code for them.
>>
>> Remove all old pc-q35 machine classes and keep only pc-q35-2.4.
> 
> But doesn't that mean that anyone who has a machine configured with one
> of those machine types will suddenly find it wont start?
> 
> Dave
> 

To some extent, all versions of this board prior to 2.4 should be
considered unsupported and we should discourage their use anyway.

If you really want, I suppose we could just alias them to 2.4 ...

>>
>> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
>> ---
>>  hw/i386/pc_q35.c | 153 -------------------------------------------------------
>>  1 file changed, 153 deletions(-)
>>
>> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
>> index 4ee653e..e482f2f 100644
>> --- a/hw/i386/pc_q35.c
>> +++ b/hw/i386/pc_q35.c
>> @@ -272,60 +272,6 @@ static void pc_q35_init(MachineState *machine)
>>      }
>>  }
>>  
>> -static void pc_compat_2_3(MachineState *machine)
>> -{
>> -    PCMachineState *pcms = PC_MACHINE(machine);
>> -    savevm_skip_section_footers();
>> -    if (kvm_enabled()) {
>> -        pcms->smm = ON_OFF_AUTO_OFF;
>> -    }
>> -    global_state_set_optional();
>> -    savevm_skip_configuration();
>> -}
>> -
>> -static void pc_compat_2_2(MachineState *machine)
>> -{
>> -    pc_compat_2_3(machine);
>> -    machine->suppress_vmdesc = true;
>> -}
>> -
>> -static void pc_compat_2_1(MachineState *machine)
>> -{
>> -    PCMachineState *pcms = PC_MACHINE(machine);
>> -
>> -    pc_compat_2_2(machine);
>> -    pcms->enforce_aligned_dimm = false;
>> -    x86_cpu_compat_kvm_no_autodisable(FEAT_8000_0001_ECX, CPUID_EXT3_SVM);
>> -}
>> -
>> -static void pc_compat_2_0(MachineState *machine)
>> -{
>> -    pc_compat_2_1(machine);
>> -}
>> -
>> -static void pc_compat_1_7(MachineState *machine)
>> -{
>> -    pc_compat_2_0(machine);
>> -    option_rom_has_mr = true;
>> -    x86_cpu_compat_kvm_no_autoenable(FEAT_1_ECX, CPUID_EXT_X2APIC);
>> -}
>> -
>> -static void pc_compat_1_6(MachineState *machine)
>> -{
>> -    pc_compat_1_7(machine);
>> -    rom_file_has_mr = false;
>> -}
>> -
>> -static void pc_compat_1_5(MachineState *machine)
>> -{
>> -    pc_compat_1_6(machine);
>> -}
>> -
>> -static void pc_compat_1_4(MachineState *machine)
>> -{
>> -    pc_compat_1_5(machine);
>> -}
>> -
>>  #define DEFINE_Q35_MACHINE(suffix, name, compatfn, optionfn) \
>>      static void pc_init_##suffix(MachineState *machine) \
>>      { \
>> @@ -358,102 +304,3 @@ static void pc_q35_2_4_machine_options(MachineClass *m)
>>  
>>  DEFINE_Q35_MACHINE(v2_4, "pc-q35-2.4", NULL,
>>                     pc_q35_2_4_machine_options);
>> -
>> -
>> -static void pc_q35_2_3_machine_options(MachineClass *m)
>> -{
>> -    pc_q35_2_4_machine_options(m);
>> -    m->no_floppy = 0;
>> -    m->no_tco = 1;
>> -    m->alias = NULL;
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_2_3);
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v2_3, "pc-q35-2.3", pc_compat_2_3,
>> -                   pc_q35_2_3_machine_options);
>> -
>> -
>> -static void pc_q35_2_2_machine_options(MachineClass *m)
>> -{
>> -    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
>> -    pc_q35_2_3_machine_options(m);
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_2_2);
>> -    pcmc->rsdp_in_ram = false;
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v2_2, "pc-q35-2.2", pc_compat_2_2,
>> -                   pc_q35_2_2_machine_options);
>> -
>> -
>> -static void pc_q35_2_1_machine_options(MachineClass *m)
>> -{
>> -    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
>> -    pc_q35_2_2_machine_options(m);
>> -    m->default_display = NULL;
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_2_1);
>> -    pcmc->smbios_uuid_encoded = false;
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v2_1, "pc-q35-2.1", pc_compat_2_1,
>> -                   pc_q35_2_1_machine_options);
>> -
>> -
>> -static void pc_q35_2_0_machine_options(MachineClass *m)
>> -{
>> -    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
>> -    pc_q35_2_1_machine_options(m);
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_2_0);
>> -    pcmc->has_reserved_memory = false;
>> -    pcmc->smbios_legacy_mode = true;
>> -    pcmc->acpi_data_size = 0x10000;
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v2_0, "pc-q35-2.0", pc_compat_2_0,
>> -                   pc_q35_2_0_machine_options);
>> -
>> -
>> -static void pc_q35_1_7_machine_options(MachineClass *m)
>> -{
>> -    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
>> -    pc_q35_2_0_machine_options(m);
>> -    m->default_machine_opts = NULL;
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_1_7);
>> -    pcmc->smbios_defaults = false;
>> -    pcmc->gigabyte_align = false;
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v1_7, "pc-q35-1.7", pc_compat_1_7,
>> -                   pc_q35_1_7_machine_options);
>> -
>> -
>> -static void pc_q35_1_6_machine_options(MachineClass *m)
>> -{
>> -    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
>> -    pc_q35_machine_options(m);
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_1_6);
>> -    pcmc->has_acpi_build = false;
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v1_6, "pc-q35-1.6", pc_compat_1_6,
>> -                   pc_q35_1_6_machine_options);
>> -
>> -
>> -static void pc_q35_1_5_machine_options(MachineClass *m)
>> -{
>> -    pc_q35_1_6_machine_options(m);
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_1_5);
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v1_5, "pc-q35-1.5", pc_compat_1_5,
>> -                   pc_q35_1_5_machine_options);
>> -
>> -
>> -static void pc_q35_1_4_machine_options(MachineClass *m)
>> -{
>> -    pc_q35_1_5_machine_options(m);
>> -    m->hot_add_cpu = NULL;
>> -    SET_MACHINE_COMPAT(m, PC_COMPAT_1_4);
>> -}
>> -
>> -DEFINE_Q35_MACHINE(v1_4, "pc-q35-1.4", pc_compat_1_4,
>> -                   pc_q35_1_4_machine_options);
>> -- 
>> 2.1.0
>>
>>
> --
> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
>