Re: [Qemu-devel] [PATCH for 1.1-rc1] mce_init should be called after parsing cpu_model

[Anthony Liguori <aliguori@us.ibm.com>]

What bug is this fixing?

Regards,

Anthony Liguori

On 05/09/2012 02:01 PM, Igor Mammedov wrote:
> Signed-off-by: Igor Mammedov<imammedo@redhat.com>
> ---
>   target-i386/cpu.c |   35 ++++++++++++++++++-----------------
>   1 files changed, 18 insertions(+), 17 deletions(-)
>
> diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> index 65d9af6..5d11e7b 100644
> --- a/target-i386/cpu.c
> +++ b/target-i386/cpu.c
> @@ -1153,6 +1153,22 @@ void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf, const char *optarg)
>       }
>   }
>
> +static void mce_init(X86CPU *cpu)
> +{
> +    CPUX86State *cenv =&cpu->env;
> +    unsigned int bank;
> +
> +    if (((cenv->cpuid_version>>  8)&  0xf)>= 6
> +&&  (cenv->cpuid_features&  (CPUID_MCE | CPUID_MCA)) ==
> +            (CPUID_MCE | CPUID_MCA)) {
> +        cenv->mcg_cap = MCE_CAP_DEF | MCE_BANKS_DEF;
> +        cenv->mcg_ctl = ~(uint64_t)0;
> +        for (bank = 0; bank<  MCE_BANKS_DEF; bank++) {
> +            cenv->mce_banks[bank * 4] = ~(uint64_t)0;
> +        }
> +    }
> +}
> +
>   int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
>   {
>       CPUX86State *env =&cpu->env;
> @@ -1204,6 +1220,8 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
>           error_free(error);
>           return -1;
>       }
> +
> +    mce_init(cpu);
>       return 0;
>   }
>
> @@ -1706,22 +1724,6 @@ static void x86_cpu_reset(CPUState *s)
>       cpu_watchpoint_remove_all(env, BP_CPU);
>   }
>
> -static void mce_init(X86CPU *cpu)
> -{
> -    CPUX86State *cenv =&cpu->env;
> -    unsigned int bank;
> -
> -    if (((cenv->cpuid_version>>  8)&  0xf)>= 6
> -&&  (cenv->cpuid_features&  (CPUID_MCE | CPUID_MCA)) ==
> -            (CPUID_MCE | CPUID_MCA)) {
> -        cenv->mcg_cap = MCE_CAP_DEF | MCE_BANKS_DEF;
> -        cenv->mcg_ctl = ~(uint64_t)0;
> -        for (bank = 0; bank<  MCE_BANKS_DEF; bank++) {
> -            cenv->mce_banks[bank * 4] = ~(uint64_t)0;
> -        }
> -    }
> -}
> -
>   static void x86_cpu_initfn(Object *obj)
>   {
>       X86CPU *cpu = X86_CPU(obj);
> @@ -1755,7 +1757,6 @@ static void x86_cpu_initfn(Object *obj)
>                           x86_cpuid_set_tsc_freq, NULL, NULL, NULL);
>
>       env->cpuid_apic_id = env->cpu_index;
> -    mce_init(cpu);
>   }
>
>   static void x86_cpu_common_class_init(ObjectClass *oc, void *data)