Re: [PATCH] gdbstub: move update guest debug to accel ops

["Alex Bennée" <alex.bennee@linaro.org>]

Mads Ynddal <mads@ynddal.dk> writes:

> From: Mads Ynddal <m.ynddal@samsung.com>
>
> Continuing the refactor of a48e7d9e52 (gdbstub: move guest debug support
> check to ops) by removing hardcoded kvm_enabled() from generic cpu.c
> code, and replace it with a property of AccelOpsClass.
>
> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com>

Nice. Looks good to me but I'll have a proper look when I go through my
gdbstub/next queue. I don't think this is critical for 7.2.

> ---
>  accel/kvm/kvm-accel-ops.c  |  1 +
>  cpu.c                      | 10 +++++++---
>  include/sysemu/accel-ops.h |  1 +
>  3 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c
> index fbf4fe3497..6ebf9a644f 100644
> --- a/accel/kvm/kvm-accel-ops.c
> +++ b/accel/kvm/kvm-accel-ops.c
> @@ -99,6 +99,7 @@ static void kvm_accel_ops_class_init(ObjectClass *oc, void *data)
>      ops->synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm;
>  
>  #ifdef KVM_CAP_SET_GUEST_DEBUG
> +    ops->update_guest_debug = kvm_update_guest_debug;
>      ops->supports_guest_debug = kvm_supports_guest_debug;
>      ops->insert_breakpoint = kvm_insert_breakpoint;
>      ops->remove_breakpoint = kvm_remove_breakpoint;
> diff --git a/cpu.c b/cpu.c
> index 2a09b05205..ef433a79e3 100644
> --- a/cpu.c
> +++ b/cpu.c
> @@ -31,8 +31,8 @@
>  #include "hw/core/sysemu-cpu-ops.h"
>  #include "exec/address-spaces.h"
>  #endif
> +#include "sysemu/cpus.h"
>  #include "sysemu/tcg.h"
> -#include "sysemu/kvm.h"
>  #include "sysemu/replay.h"
>  #include "exec/cpu-common.h"
>  #include "exec/exec-all.h"
> @@ -378,10 +378,14 @@ void cpu_breakpoint_remove_all(CPUState *cpu, int mask)
>  void cpu_single_step(CPUState *cpu, int enabled)
>  {
>      if (cpu->singlestep_enabled != enabled) {
> +        const AccelOpsClass *ops = cpus_get_accel();
> +
>          cpu->singlestep_enabled = enabled;
> -        if (kvm_enabled()) {
> -            kvm_update_guest_debug(cpu, 0);
> +
> +        if (ops->update_guest_debug) {
> +            ops->update_guest_debug(cpu, 0);
>          }
> +
>          trace_breakpoint_singlestep(cpu->cpu_index, enabled);
>      }
>  }
> diff --git a/include/sysemu/accel-ops.h b/include/sysemu/accel-ops.h
> index 8cc7996def..0a47a2f00c 100644
> --- a/include/sysemu/accel-ops.h
> +++ b/include/sysemu/accel-ops.h
> @@ -48,6 +48,7 @@ struct AccelOpsClass {
>  
>      /* gdbstub hooks */
>      bool (*supports_guest_debug)(void);
> +    int (*update_guest_debug)(CPUState *cpu, unsigned long flags);
>      int (*insert_breakpoint)(CPUState *cpu, int type, hwaddr addr, hwaddr len);
>      int (*remove_breakpoint)(CPUState *cpu, int type, hwaddr addr, hwaddr len);
>      void (*remove_all_breakpoints)(CPUState *cpu);


-- 
Alex Bennée