Re: [Qemu-devel] [PATCH qemu] spapr_iommu: Fix xlate trace to print translated address

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Hi Alexey,

On 8/12/19 7:42 AM, Alexey Kardashevskiy wrote:
> Currently we basically print IO address twice, fix this.
> 
> Fixes: 7e472264e9e2 ("PPC: spapr: iommu: rework traces")
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> ---
>  hw/ppc/spapr_iommu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
> index bd3d0256a65d..6fe57d799a10 100644
> --- a/hw/ppc/spapr_iommu.c
> +++ b/hw/ppc/spapr_iommu.c
> @@ -137,7 +137,7 @@ static IOMMUTLBEntry spapr_tce_translate_iommu(IOMMUMemoryRegion *iommu,
>          ret.addr_mask = ~page_mask;
>          ret.perm = spapr_tce_iommu_access_flags(tce);
>      }
> -    trace_spapr_iommu_xlate(tcet->liobn, addr, ret.iova, ret.perm,
> +    trace_spapr_iommu_xlate(tcet->liobn, addr, ret.translated_addr, ret.perm,
>                              ret.addr_mask);

But the trace format is:

spapr_iommu_xlate(uint64_t liobn, uint64_t ioba, uint64_t tce, unsigned
perm, unsigned pgsize) "liobn=%"PRIx64" 0x%"PRIx64" -> 0x%"PRIx64"
perm=%u mask=%x"

So this could be more appropriate:

  trace_spapr_iommu_xlate(tcet->liobn, ret.iova, ret.translated_addr,
                          ret.perm, ret.addr_mask);

Anyhow your patch is an improvment, so regardless addr/ret.iova:
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

>  
>      return ret;
>