Re: [Qemu-devel] [PATCH 9/9] spapr_hcall: Add address-translation-mode-on-interrupt resource in H_SET_MODE

[Alexander Graf <agraf@suse.de>]

On 21.05.14 08:20, Alexey Kardashevskiy wrote:
> This adds handling of the RESOURCE_ADDR_TRANS_MODE resource from
> the H_SET_MODE, for POWER8 (PowerISA 2.07) only.
>
> This defines AIL flags for LPCR special register.
>
> This changes @excp_prefix according to the mode, takes effect in TCG.
>
> This turns support of a new capability PPC2_ISA207S flag for TCG.
>
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> ---
>   hw/ppc/spapr_hcall.c     | 47 +++++++++++++++++++++++++++++++++++++++++++++++
>   include/hw/ppc/spapr.h   |  5 +++++
>   target-ppc/cpu.h         |  4 +++-
>   target-ppc/excp_helper.c |  7 +++++--
>   4 files changed, 60 insertions(+), 3 deletions(-)
>
> diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
> index 443e2b6..e586c8b 100644
> --- a/hw/ppc/spapr_hcall.c
> +++ b/hw/ppc/spapr_hcall.c
> @@ -740,6 +740,49 @@ static target_ulong h_set_mode_resouce_le(PowerPCCPU *cpu,
>       return H_UNSUPPORTED_FLAG;
>   }
>   
> +static target_ulong h_set_mode_resouce_addr_trans_mode(PowerPCCPU *cpu,
> +                                                       target_ulong mflags,
> +                                                       target_ulong value1,
> +                                                       target_ulong value2)
> +{
> +    CPUState *cs;
> +    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
> +    target_ulong prefix;
> +
> +    if (!(pcc->insns_flags2 & PPC2_ISA207S)) {
> +        return H_P2;
> +    }
> +    if (value1) {
> +        return H_P3;
> +    }
> +    if (value2) {
> +        return H_P4;
> +    }
> +
> +    switch (mflags) {
> +    case H_SET_MODE_ADDR_TRANS_NONE:
> +        prefix = 0;
> +        break;
> +    case H_SET_MODE_ADDR_TRANS_0001_8000:
> +        prefix = 0x18000;
> +        break;
> +    case H_SET_MODE_ADDR_TRANS_C000_0000_0000_4000:
> +        prefix = 0xC000000000004000;
> +        break;
> +    default:
> +        return H_UNSUPPORTED_FLAG;
> +    }
> +
> +    CPU_FOREACH(cs) {
> +        CPUPPCState *env = &POWERPC_CPU(cpu)->env;
> +
> +        set_spr(cs, SPR_LPCR, mflags << LPCR_AIL_SH, LPCR_AIL);
> +        env->excp_prefix = prefix;

I think it makes sense to run this on every vcpu thread individually to 
ensure they all are updated after the hcall has finished.


Alex