Re: [PATCH v15 04/23] cpu: Move synchronize_from_tb() to tcg_ops

[Alex Bennée]

Claudio Fontana <cfontana@suse.de> writes:

> From: Eduardo Habkost <ehabkost@redhat.com>
>
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
>
> [claudio: wrapped target code in CONFIG_TCG]
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> ---
>  include/hw/core/cpu.h     | 20 +++++++++++---------
>  accel/tcg/cpu-exec.c      |  4 ++--
>  target/arm/cpu.c          |  4 +++-
>  target/avr/cpu.c          |  2 +-
>  target/hppa/cpu.c         |  2 +-
>  target/i386/tcg/tcg-cpu.c |  2 +-
>  target/microblaze/cpu.c   |  2 +-
>  target/mips/cpu.c         |  4 +++-
>  target/riscv/cpu.c        |  2 +-
>  target/rx/cpu.c           |  2 +-
>  target/sh4/cpu.c          |  2 +-
>  target/sparc/cpu.c        |  2 +-
>  target/tricore/cpu.c      |  2 +-
>  13 files changed, 28 insertions(+), 22 deletions(-)
>
> diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
> index d0b17dcc4c..b9803885e5 100644
> --- a/include/hw/core/cpu.h
> +++ b/include/hw/core/cpu.h
> @@ -86,6 +86,17 @@ typedef struct TcgCpuOperations {
>       * Called when the first CPU is realized.
>       */
>      void (*initialize)(void);
> +    /**
> +     * @synchronize_from_tb: Synchronize state from a TCG #TranslationBlock
> +     *
> +     * This is called when we abandon execution of a TB before
> +     * starting it, and must set all parts of the CPU state which
> +     * the previous TB in the chain may not have updated. This
> +     * will need to do more. If this hook is not implemented then
> +     * the default is to call @set_pc(tb->pc).
> +     */
> +    void (*synchronize_from_tb)(CPUState *cpu,
> +                                const struct TranslationBlock *tb);

Did you miss my comment last time or just not think it flowed better?

  ...TB in the chain may not have updated. By default when no hook is
  defined a call is made to @set_pc(tb->pc). If more state needs to be
  restored the front-end must provide a hook function and restore all the
  state there.

Either way:

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée