Re: [PATCH 9/9] target/i386: Extract x86_cpu_exec_halt() from accel/tcg/

[Anton Johansson]

On 24/01/24, Philippe Mathieu-Daudé wrote:
> Move this x86-specific code out of the generic accel/tcg/.
> 
> Reported-by: Anton Johansson <anjo@rev.ng>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  target/i386/tcg/helper-tcg.h        |  1 +
>  accel/tcg/cpu-exec.c                | 12 ------------
>  target/i386/tcg/sysemu/seg_helper.c | 13 +++++++++++++
>  target/i386/tcg/tcg-cpu.c           |  1 +
>  4 files changed, 15 insertions(+), 12 deletions(-)
> 
> diff --git a/target/i386/tcg/helper-tcg.h b/target/i386/tcg/helper-tcg.h
> index 253b1f561e..effc2c1c98 100644
> --- a/target/i386/tcg/helper-tcg.h
> +++ b/target/i386/tcg/helper-tcg.h
> @@ -39,6 +39,7 @@ QEMU_BUILD_BUG_ON(TCG_PHYS_ADDR_BITS > 
> TARGET_PHYS_ADDR_SPACE_BITS);
>   */
>  void x86_cpu_do_interrupt(CPUState *cpu);
>  #ifndef CONFIG_USER_ONLY
> +void x86_cpu_exec_halt(CPUState *cpu);
>  bool x86_need_replay_interrupt(int interrupt_request);
>  bool x86_cpu_exec_interrupt(CPUState *cpu, int int_req);
>  #endif
> diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
> index 390a9644da..7662f4973d 100644
> --- a/accel/tcg/cpu-exec.c
> +++ b/accel/tcg/cpu-exec.c
> @@ -30,9 +30,6 @@
>  #include "qemu/rcu.h"
>  #include "exec/log.h"
>  #include "qemu/main-loop.h"
> -#if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
> -#include "hw/i386/apic.h"
> -#endif
>  #include "sysemu/cpus.h"
>  #include "exec/cpu-all.h"
>  #include "sysemu/cpu-timers.h"
> @@ -672,15 +669,6 @@ static inline bool cpu_handle_halt(CPUClass *cc, 
> CPUState *cpu)
>  {
>  #ifndef CONFIG_USER_ONLY
>      if (cpu->halted) {
> -#if defined(TARGET_I386)
> -        if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
> -            X86CPU *x86_cpu = X86_CPU(cpu);
> -            bql_lock();
> -            apic_poll_irq(x86_cpu->apic_state);
> -            cpu_reset_interrupt(cpu, CPU_INTERRUPT_POLL);
> -            bql_unlock();
> -        }
> -#endif /* TARGET_I386 */
>          if (cc->tcg_ops->cpu_exec_halt) {
>              cc->tcg_ops->cpu_exec_halt(cpu);
>          }
> diff --git a/target/i386/tcg/sysemu/seg_helper.c 
> b/target/i386/tcg/sysemu/seg_helper.c
> index e6f42282bb..2db8083748 100644
> --- a/target/i386/tcg/sysemu/seg_helper.c
> +++ b/target/i386/tcg/sysemu/seg_helper.c
> @@ -20,6 +20,7 @@
>  
>  #include "qemu/osdep.h"
>  #include "qemu/log.h"
> +#include "qemu/main-loop.h"
>  #include "cpu.h"
>  #include "exec/helper-proto.h"
>  #include "exec/cpu_ldst.h"
> @@ -127,6 +128,18 @@ void x86_cpu_do_interrupt(CPUState *cs)
>      }
>  }
>  
> +void x86_cpu_exec_halt(CPUState *cpu)
> +{
> +    if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
> +        X86CPU *x86_cpu = X86_CPU(cpu);
> +
> +        bql_lock();
> +        apic_poll_irq(x86_cpu->apic_state);
> +        cpu_reset_interrupt(cpu, CPU_INTERRUPT_POLL);
> +        bql_unlock();
> +    }
> +}
> +
>  bool x86_need_replay_interrupt(int interrupt_request)
>  {
>      /*
> diff --git a/target/i386/tcg/tcg-cpu.c b/target/i386/tcg/tcg-cpu.c
> index 255d56d4c3..3028b57c97 100644
> --- a/target/i386/tcg/tcg-cpu.c
> +++ b/target/i386/tcg/tcg-cpu.c
> @@ -119,6 +119,7 @@ static const struct TCGCPUOps x86_tcg_ops = {
>  #else
>      .tlb_fill = x86_cpu_tlb_fill,
>      .do_interrupt = x86_cpu_do_interrupt,
> +    .cpu_exec_halt = x86_cpu_exec_halt,
>      .cpu_exec_interrupt = x86_cpu_exec_interrupt,
>      .do_unaligned_access = x86_cpu_do_unaligned_access,
>      .debug_excp_handler = breakpoint_handler,
> -- 
> 2.41.0
> 
Reviewed-by: Anton Johansson <anjo@rev.ng>