Re: [PATCH] target/ppc: Fix build warnings when building with 'disable-tcg'

[Greg Kurz]

On Thu, 17 Nov 2022 07:11:51 -0300
Daniel Henrique Barboza <danielhb413@gmail.com> wrote:

> Queued in gitlab.com/danielhb/qemu/tree/ppc-next with the following tags:
> 

You are planning a PR before 7.2-rc2, right ?

> 
>      Reported-by: Kowshik Jois B S <kowsjois@linux.ibm.com>
>      Fixes: 61bd1d2942 ("target/ppc: Convert to tcg_ops restore_state_to_opc")
>      Fixes: 670f1da374 ("target/ppc: Implement hashst and hashchk")

The guard macro also covers the following two, introduced by yet another commit.

  HELPER_HASH(HASHSTP, env->spr[SPR_HASHPKEYR], true)
  HELPER_HASH(HASHCHKP, env->spr[SPR_HASHPKEYR], false)

Fixes: 53ae2aeb9407 ("target/ppc: Implement hashstp and hashchkp")

>      Resolves: https://gitlab.com/qemu-project/qemu/-/issues/377

Err... I don't see any relation with this issue.

Cedric ?

But this resolves the issue created by Vaibhav for 7.2 :

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1319

>      Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
>      Reviewed-by: Greg Kurz <groug@kaod.org>
>      Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>      Tested-by: Kowshik Jois B S <kowsjois@linux.vnet.ibm.com>
> 
> 
> Thanks,
> 
> 
> Daniel
> 
> On 11/16/22 10:17, Vaibhav Jain wrote:
> > Kowshik reported that building qemu with GCC 12.2.1 for 'ppc64-softmmu'
> > target is failing due to following build warnings:
> > 
> > <snip>
> >   ../target/ppc/cpu_init.c:7018:13: error: 'ppc_restore_state_to_opc' 
> > defined but not used [-Werror=unused-function]
> >   7018 | static void ppc_restore_state_to_opc(CPUState *cs,
> > <snip>
> > 
> > Fix this by wrapping these function definitions in 'ifdef CONFIG_TCG' so 
> > that
> > they are only defined if qemu is compiled with '--enable-tcg'
> > 
> > Reported-by: Kowshik Jois B S <kowsjois@linux.ibm.com>
> > Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
> > ---
> >   target/ppc/cpu_init.c    | 2 ++
> >   target/ppc/excp_helper.c | 2 ++
> >   2 files changed, 4 insertions(+)
> > 
> > diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
> > index 32e94153d1..cbf0081374 100644
> > --- a/target/ppc/cpu_init.c
> > +++ b/target/ppc/cpu_init.c
> > @@ -7015,6 +7015,7 @@ static vaddr ppc_cpu_get_pc(CPUState *cs)
> >       return cpu->env.nip;
> >   }
> >   
> > +#ifdef CONFIG_TCG
> >   static void ppc_restore_state_to_opc(CPUState *cs,
> >                                        const TranslationBlock *tb,
> >                                        const uint64_t *data)
> > @@ -7023,6 +7024,7 @@ static void ppc_restore_state_to_opc(CPUState *cs,
> >   
> >       cpu->env.nip = data[0];
> >   }
> > +#endif /* CONFIG_TCG */
> >   
> >   static bool ppc_cpu_has_work(CPUState *cs)
> >   {
> > diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
> > index a05a2ed595..94adcb766b 100644
> > --- a/target/ppc/excp_helper.c
> > +++ b/target/ppc/excp_helper.c
> > @@ -2842,6 +2842,7 @@ void helper_td(CPUPPCState *env, target_ulong arg1, 
> > target_ulong arg2,
> >   #endif
> >   #endif
> >   
> > +#ifdef CONFIG_TCG
> >   static uint32_t helper_SIMON_LIKE_32_64(uint32_t x, uint64_t key, 
> > uint32_t lane)
> >   {
> >       const uint16_t c = 0xfffc;
> > @@ -2924,6 +2925,7 @@ HELPER_HASH(HASHST, env->spr[SPR_HASHKEYR], true)
> >   HELPER_HASH(HASHCHK, env->spr[SPR_HASHKEYR], false)
> >   HELPER_HASH(HASHSTP, env->spr[SPR_HASHPKEYR], true)
> >   HELPER_HASH(HASHCHKP, env->spr[SPR_HASHPKEYR], false)
> > +#endif /* CONFIG_TCG */
> >   
> >   #if !defined(CONFIG_USER_ONLY)
> >