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Re: [Qemu-ppc] [TRIVIAL][RFC][PATCH] FU exceptions should carry a cause


From: David Gibson
Subject: Re: [Qemu-ppc] [TRIVIAL][RFC][PATCH] FU exceptions should carry a cause (IC)
Date: Thu, 10 Nov 2016 13:06:17 +1100
User-agent: Mutt/1.7.1 (2016-10-04)

On Thu, Nov 10, 2016 at 12:42:37PM +1100, Balbir Singh wrote:
> 
> 
> As per the ISA we need a cause for FU exceptions.Executing a tabort r9
> for example in libc, causes a EXCP_FU exception. We don't wire up the
> IC (cause) when we post the exception. The cause is required
> for the kernel to do the right thing. I caught this issue while testing
> the latest kernel against Cedrics' latest pnv ipmi branch.
> 
> Signed-off-by: Balbir singh <address@hidden>

Applied to ppc-for-2.8

> ---
>  target-ppc/excp_helper.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/target-ppc/excp_helper.c b/target-ppc/excp_helper.c
> index 808760b..cccea8d 100644
> --- a/target-ppc/excp_helper.c
> +++ b/target-ppc/excp_helper.c
> @@ -427,6 +427,7 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int 
> excp_model, int excp)
>      case POWERPC_EXCP_VPU:       /* Vector unavailable exception             
> */
>      case POWERPC_EXCP_VSXU:       /* VSX unavailable exception               
> */
>      case POWERPC_EXCP_FU:         /* Facility unavailable exception          
> */
> +        env->spr[SPR_FSCR] |= ((target_ulong)env->error_code << 56);
>          break;
>      case POWERPC_EXCP_PIT:       /* Programmable interval timer interrupt    
> */
>          LOG_EXCP("PIT exception\n");

-- 
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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