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[POWERPC] spufs: provide siginfo for SPE faults

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This change populates a siginfo struct for SPE application exceptions
(ie, invalid DMAs and illegal instructions).

Tested on an IBM Cell Blade.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Jeremy Kerr 2007-04-23 21:08:16 +02:00 committed by Arnd Bergmann
parent 57dace2391
commit c8a1e9393a
1 changed files with 25 additions and 7 deletions
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32
arch/powerpc/platforms/cell/spufs/fault.c
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@ -97,28 +97,46 @@ bad_area:
return -EFAULT;
}
static void spufs_handle_dma_error(struct spu_context *ctx, int type)
static void spufs_handle_dma_error(struct spu_context *ctx,
unsigned long ea, int type)
{
if (ctx->flags & SPU_CREATE_EVENTS_ENABLED) {
ctx->event_return |= type;
wake_up_all(&ctx->stop_wq);
} else {
siginfo_t info;
memset(&info, 0, sizeof(info));
switch (type) {
case SPE_EVENT_DMA_ALIGNMENT:
case SPE_EVENT_SPE_DATA_STORAGE:
case SPE_EVENT_INVALID_DMA:
force_sig(SIGBUS, /* info, */ current);
info.si_signo = SIGBUS;
info.si_code = BUS_OBJERR;
break;
case SPE_EVENT_SPE_DATA_STORAGE:
info.si_signo = SIGBUS;
info.si_addr = (void __user *)ea;
info.si_code = BUS_ADRERR;
break;
case SPE_EVENT_DMA_ALIGNMENT:
info.si_signo = SIGBUS;
/* DAR isn't set for an alignment fault :( */
info.si_code = BUS_ADRALN;
break;
case SPE_EVENT_SPE_ERROR:
force_sig(SIGILL, /* info */ current);
info.si_signo = SIGILL;
info.si_addr = (void __user *)(unsigned long)
ctx->ops->npc_read(ctx) - 4;
info.si_code = ILL_ILLOPC;
break;
}
if (info.si_signo)
force_sig_info(info.si_signo, &info, current);
}
}
void spufs_dma_callback(struct spu *spu, int type)
{
spufs_handle_dma_error(spu->ctx, type);
spufs_handle_dma_error(spu->ctx, spu->dar, type);
}
EXPORT_SYMBOL_GPL(spufs_dma_callback);
@ -186,7 +204,7 @@ int spufs_handle_class1(struct spu_context *ctx)
if (ctx->spu)
ctx->ops->restart_dma(ctx);
} else
spufs_handle_dma_error(ctx, SPE_EVENT_SPE_DATA_STORAGE);
spufs_handle_dma_error(ctx, ea, SPE_EVENT_SPE_DATA_STORAGE);
return ret;
}