Re: [PATCH v2 13/14] spapr: nested: keep nested-hv exit code restricted to its API.

[Nicholas Piggin]

On Thu Oct 12, 2023 at 8:49 PM AEST, Harsh Prateek Bora wrote:
> spapr_exit_nested gets triggered on a nested guest exit and currently
> being used only for nested-hv API. Isolating code flows based on API
> helps extending it to be used with nested PAPR API as well.
>

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>

> Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
> ---
>  hw/ppc/spapr_nested.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/hw/ppc/spapr_nested.c b/hw/ppc/spapr_nested.c
> index 607fb7ead2..e2d0cb5559 100644
> --- a/hw/ppc/spapr_nested.c
> +++ b/hw/ppc/spapr_nested.c
> @@ -325,7 +325,7 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
>      return env->gpr[3];
>  }
>  
> -void spapr_exit_nested(PowerPCCPU *cpu, int excp)
> +static void spapr_exit_nested_hv(PowerPCCPU *cpu, int excp)
>  {
>      CPUPPCState *env = &cpu->env;
>      SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
> @@ -337,8 +337,6 @@ void spapr_exit_nested(PowerPCCPU *cpu, int excp)
>      struct kvmppc_pt_regs *regs;
>      hwaddr len;
>  
> -    assert(spapr_cpu->in_nested);
> -
>      nested_save_state(&l2_state, cpu);
>      hsrr0 = env->spr[SPR_HSRR0];
>      hsrr1 = env->spr[SPR_HSRR1];
> @@ -428,6 +426,17 @@ void spapr_exit_nested(PowerPCCPU *cpu, int excp)
>      address_space_unmap(CPU(cpu)->as, regs, len, len, true);
>  }
>  
> +void spapr_exit_nested(PowerPCCPU *cpu, int excp)
> +{
> +    SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
> +    SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
> +
> +    assert(spapr_cpu->in_nested);
> +    if (spapr->nested.api == NESTED_API_KVM_HV) {
> +        spapr_exit_nested_hv(cpu, excp);
> +    }
> +}
> +
>  SpaprMachineStateNestedGuest *spapr_get_nested_guest(SpaprMachineState 
> *spapr,
>                                                       target_ulong guestid)
>  {