Re: [RFC v2 02/12] target/ppc: powerpc_excp: Set vector earlier

["Cédric Le Goater" <clg@kaod.org>]

Adding Nicholas.

On 12/20/21 19:18, Fabiano Rosas wrote:
> None of the interrupt setup code touches 'vector', so we can move it
> earlier in the function. This will allow us to later move the System
> Call Vectored setup that is on the top level into the
> POWERPC_EXCP_SYSCALL_VECTORED code block.
> 
> This patch also moves the verification for when 'excp' does not have
> an address associated with it. We now bail a little earlier when that
> is the case. This should not cause any visible effects.
> 
> Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>


Reviewed-by: Cédric Le Goater <clg@kaod.org>

Thanks,

C.
     
> ---
>   target/ppc/excp_helper.c | 16 ++++++++--------
>   1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
> index 8b9c6bc5a8..14fd0213a0 100644
> --- a/target/ppc/excp_helper.c
> +++ b/target/ppc/excp_helper.c
> @@ -352,6 +352,14 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
>       }
>   #endif
>   
> +    vector = env->excp_vectors[excp];
> +    if (vector == (target_ulong)-1ULL) {
> +        cpu_abort(cs, "Raised an exception without defined vector %d\n",
> +                  excp);
> +    }
> +
> +    vector |= env->excp_prefix;
> +
>       switch (excp) {
>       case POWERPC_EXCP_NONE:
>           /* Should never happen */
> @@ -831,14 +839,6 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
>       }
>   #endif
>   
> -    vector = env->excp_vectors[excp];
> -    if (vector == (target_ulong)-1ULL) {
> -        cpu_abort(cs, "Raised an exception without defined vector %d\n",
> -                  excp);
> -    }
> -
> -    vector |= env->excp_prefix;
> -
>   #if defined(TARGET_PPC64)
>       if (excp_model == POWERPC_EXCP_BOOKE) {
>           if (env->spr[SPR_BOOKE_EPCR] & EPCR_ICM) {
>