Re: [Qemu-devel] [PATCH 2/2] spapr: Define NMI interface

[Paolo Bonzini]

Il 27/03/2014 03:21, Alexey Kardashevskiy ha scritto:
> This defines and makes use of an NMI interface in order to support
> the "nmi" command.
>
> Signed-off-by: Alexey Kardashevskiy <address@hidden>
> ---
>  hw/ppc/spapr.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
>
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 62ddb4d..495fa88 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -48,6 +48,7 @@
>  #include "hw/pci/pci.h"
>  #include "hw/scsi/scsi.h"
>  #include "hw/virtio/virtio-scsi.h"
> +#include "hw/nmi.h"
>
>  #include "exec/address-spaces.h"
>  #include "hw/usb.h"
> @@ -1539,13 +1540,36 @@ static char *spapr_get_fw_dev_path(FWPathProvider *p, 
> BusState *bus,
>      return NULL;
>  }
>
> +static void spapr_do_nmi(void *arg)
> +{
> +    CPUState *cs = arg;
> +    PowerPCCPU *cpu = POWERPC_CPU(cs);
> +    CPUPPCState *env = &cpu->env;
> +
> +    cpu_synchronize_state(cs);
> +    env->spr[SPR_SRR0] = env->nip;
> +    env->spr[SPR_SRR1] = env->msr;
> +    env->nip = 0x100;
> +    env->msr = (1ULL << MSR_SF) | (1 << MSR_ME);
> +    if (env->spr[SPR_LPCR] & LPCR_ILE) {
> +        env->msr |= 1 << MSR_LE;
> +    }
> +}


I think an interface isn't the right tool here.  You want a method in 
CPUClass, and you also should move the existing code for x86 and s390 to 
target-i386 and target-s390.

Paolo