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Re: [PATCH v5 01/10] target/ppc: Extract post_load_update_msr


From: David Gibson
Subject: Re: [PATCH v5 01/10] target/ppc: Extract post_load_update_msr
Date: Wed, 24 Mar 2021 11:00:09 +1100

On Tue, Mar 23, 2021 at 12:43:31PM -0600, Richard Henderson wrote:
> Extract post_load_update_msr to share between cpu_load_old
> and cpu_post_load in updating the msr.
> 
> Suggested-by: C├ędric Le Goater <clg@kaod.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Applied to ppc-for-6.0.

> ---
>  target/ppc/machine.c | 30 ++++++++++++++----------------
>  1 file changed, 14 insertions(+), 16 deletions(-)
> 
> diff --git a/target/ppc/machine.c b/target/ppc/machine.c
> index 1f7a353c78..09c5765a87 100644
> --- a/target/ppc/machine.c
> +++ b/target/ppc/machine.c
> @@ -10,6 +10,18 @@
>  #include "kvm_ppc.h"
>  #include "exec/helper-proto.h"
>  
> +static void post_load_update_msr(CPUPPCState *env)
> +{
> +    target_ulong msr = env->msr;
> +
> +    /*
> +     * Invalidate all supported msr bits except MSR_TGPR/MSR_HVB
> +     * before restoring.  Note that this recomputes hflags and mem_idx.
> +     */
> +    env->msr ^= env->msr_mask & ~((1ULL << MSR_TGPR) | MSR_HVB);
> +    ppc_store_msr(env, msr);
> +}
> +
>  static int cpu_load_old(QEMUFile *f, void *opaque, int version_id)
>  {
>      PowerPCCPU *cpu = opaque;
> @@ -21,7 +33,6 @@ static int cpu_load_old(QEMUFile *f, void *opaque, int 
> version_id)
>      int32_t slb_nr;
>  #endif
>      target_ulong xer;
> -    target_ulong msr;
>  
>      for (i = 0; i < 32; i++) {
>          qemu_get_betls(f, &env->gpr[i]);
> @@ -117,13 +128,7 @@ static int cpu_load_old(QEMUFile *f, void *opaque, int 
> version_id)
>      qemu_get_sbe32(f); /* Discard unused mmu_idx */
>      qemu_get_sbe32(f); /* Discard unused power_mode */
>  
> -    /*
> -     * Invalidate all supported msr bits except MSR_TGPR/MSR_HVB
> -     * before restoring.  Note that this recomputes hflags and mem_idx.
> -     */
> -    msr = env->msr;
> -    env->msr ^= env->msr_mask & ~((1ULL << MSR_TGPR) | MSR_HVB);
> -    ppc_store_msr(env, msr);
> +    post_load_update_msr(env);
>  
>      return 0;
>  }
> @@ -343,7 +348,6 @@ static int cpu_post_load(void *opaque, int version_id)
>      PowerPCCPU *cpu = opaque;
>      CPUPPCState *env = &cpu->env;
>      int i;
> -    target_ulong msr;
>  
>      /*
>       * If we're operating in compat mode, we should be ok as long as
> @@ -417,13 +421,7 @@ static int cpu_post_load(void *opaque, int version_id)
>          ppc_store_sdr1(env, env->spr[SPR_SDR1]);
>      }
>  
> -    /*
> -     * Invalidate all supported msr bits except MSR_TGPR/MSR_HVB
> -     * before restoring.  Note that this recomputes hflags and mem_idx.
> -     */
> -    msr = env->msr;
> -    env->msr ^= env->msr_mask & ~((1ULL << MSR_TGPR) | MSR_HVB);
> -    ppc_store_msr(env, msr);
> +    post_load_update_msr(env);
>  
>      return 0;
>  }

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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