Re: [RFC v8 15/27] cpu: Introduce TCGCpuOperations struct

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 12/5/20 5:15 PM, Claudio Fontana wrote:
> From: Eduardo Habkost <ehabkost@redhat.com>
> 
> The TCG-specific CPU methods will be moved to a separate struct,
> to make it easier to move accel-specific code outside generic CPU
> code in the future.  Start by moving tcg_initialize().
> 
> The new CPUClass.tcg_opts field may eventually become a pointer,
> but keep it an embedded struct for now, to make code conversion
> easier.
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> 
> [claudio: make the tcg code build for CONFIG_TCG only]
> 
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
>  MAINTAINERS                     |  1 +
>  cpu.c                           |  6 +++++-
>  include/hw/core/cpu.h           |  9 ++++++++-
>  include/hw/core/tcg-cpu-ops.h   | 25 +++++++++++++++++++++++++
>  target/alpha/cpu.c              |  2 +-
>  target/arm/cpu.c                |  2 +-
>  target/avr/cpu.c                |  2 +-
>  target/cris/cpu.c               | 12 ++++++------
>  target/hppa/cpu.c               |  2 +-
>  target/i386/tcg-cpu.c           |  2 +-
>  target/lm32/cpu.c               |  2 +-
>  target/m68k/cpu.c               |  2 +-
>  target/microblaze/cpu.c         |  2 +-
>  target/mips/cpu.c               |  2 +-
>  target/moxie/cpu.c              |  2 +-
>  target/nios2/cpu.c              |  2 +-
>  target/openrisc/cpu.c           |  2 +-
>  target/ppc/translate_init.c.inc |  2 +-
>  target/riscv/cpu.c              |  2 +-
>  target/rx/cpu.c                 |  2 +-
>  target/s390x/cpu.c              |  2 +-
>  target/sh4/cpu.c                |  2 +-
>  target/sparc/cpu.c              |  2 +-
>  target/tilegx/cpu.c             |  2 +-
>  target/tricore/cpu.c            |  2 +-
>  target/unicore32/cpu.c          |  2 +-
>  target/xtensa/cpu.c             |  2 +-
>  27 files changed, 67 insertions(+), 30 deletions(-)
>  create mode 100644 include/hw/core/tcg-cpu-ops.h
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index f53f2678d8..d876f504a6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1535,6 +1535,7 @@ F: qapi/machine.json
>  F: qapi/machine-target.json
>  F: include/hw/boards.h
>  F: include/hw/core/cpu.h
> +F: include/hw/core/tcg-cpu-ops.h
>  F: include/hw/cpu/cluster.h
>  F: include/sysemu/numa.h
>  T: git https://github.com/ehabkost/qemu.git machine-next
> diff --git a/cpu.c b/cpu.c
> index 0be5dcb6f3..27ad096cc4 100644
> --- a/cpu.c
> +++ b/cpu.c
> @@ -174,14 +174,18 @@ void cpu_exec_initfn(CPUState *cpu)
>  void cpu_exec_realizefn(CPUState *cpu, Error **errp)
>  {
>      CPUClass *cc = CPU_GET_CLASS(cpu);
> +#ifdef CONFIG_TCG
>      static bool tcg_target_initialized;
> +#endif /* CONFIG_TCG */

Maybe worth extract as tcg_target_initialized() method.

>  
>      cpu_list_add(cpu);
>  
> +#ifdef CONFIG_TCG
>      if (tcg_enabled() && !tcg_target_initialized) {
>          tcg_target_initialized = true;
> -        cc->tcg_initialize();
> +        cc->tcg_ops.initialize();
>      }
> +#endif /* CONFIG_TCG */
>      tlb_init(cpu);
[...]