Re: [Qemu-devel] [PATCH v2] spapr: introduce helpers to migrate HPT chunks and the end marker

[David Gibson <david@gibson.dropbear.id.au>]

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On Tue, Sep 19, 2017 at 04:11:07PM +0200, Greg Kurz wrote:
> This consolidates some duplicated code in a dedicated helpers.
> 
> Signed-off-by: Greg Kurz <groug@kaod.org>

Applied to ppc-for-2.11.

> ---
> v2: - open-code writes for the end marker
> ---
>  hw/ppc/spapr.c |   38 +++++++++++++++++++++-----------------
>  1 file changed, 21 insertions(+), 17 deletions(-)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index f680f28a15ea..c18c36da71d6 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -1708,6 +1708,23 @@ static int htab_save_setup(QEMUFile *f, void *opaque)
>      return 0;
>  }
>  
> +static void htab_save_chunk(QEMUFile *f, sPAPRMachineState *spapr,
> +                            int chunkstart, int n_valid, int n_invalid)
> +{
> +    qemu_put_be32(f, chunkstart);
> +    qemu_put_be16(f, n_valid);
> +    qemu_put_be16(f, n_invalid);
> +    qemu_put_buffer(f, HPTE(spapr->htab, chunkstart),
> +                    HASH_PTE_SIZE_64 * n_valid);
> +}
> +
> +static void htab_save_end_marker(QEMUFile *f)
> +{
> +    qemu_put_be32(f, 0);
> +    qemu_put_be16(f, 0);
> +    qemu_put_be16(f, 0);
> +}
> +
>  static void htab_save_first_pass(QEMUFile *f, sPAPRMachineState *spapr,
>                                   int64_t max_ns)
>  {
> @@ -1739,11 +1756,7 @@ static void htab_save_first_pass(QEMUFile *f, sPAPRMachineState *spapr,
>          if (index > chunkstart) {
>              int n_valid = index - chunkstart;
>  
> -            qemu_put_be32(f, chunkstart);
> -            qemu_put_be16(f, n_valid);
> -            qemu_put_be16(f, 0);
> -            qemu_put_buffer(f, HPTE(spapr->htab, chunkstart),
> -                            HASH_PTE_SIZE_64 * n_valid);
> +            htab_save_chunk(f, spapr, chunkstart, n_valid, 0);
>  
>              if (has_timeout &&
>                  (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - starttime) > max_ns) {
> @@ -1805,11 +1818,7 @@ static int htab_save_later_pass(QEMUFile *f, sPAPRMachineState *spapr,
>              int n_valid = invalidstart - chunkstart;
>              int n_invalid = index - invalidstart;
>  
> -            qemu_put_be32(f, chunkstart);
> -            qemu_put_be16(f, n_valid);
> -            qemu_put_be16(f, n_invalid);
> -            qemu_put_buffer(f, HPTE(spapr->htab, chunkstart),
> -                            HASH_PTE_SIZE_64 * n_valid);
> +            htab_save_chunk(f, spapr, chunkstart, n_valid, n_invalid);
>              sent += index - chunkstart;
>  
>              if (!final && (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - starttime) > max_ns) {
> @@ -1872,10 +1881,7 @@ static int htab_save_iterate(QEMUFile *f, void *opaque)
>          rc = htab_save_later_pass(f, spapr, MAX_ITERATION_NS);
>      }
>  
> -    /* End marker */
> -    qemu_put_be32(f, 0);
> -    qemu_put_be16(f, 0);
> -    qemu_put_be16(f, 0);
> +    htab_save_end_marker(f);
>  
>      return rc;
>  }
> @@ -1915,9 +1921,7 @@ static int htab_save_complete(QEMUFile *f, void *opaque)
>      }
>  
>      /* End marker */
> -    qemu_put_be32(f, 0);
> -    qemu_put_be16(f, 0);
> -    qemu_put_be16(f, 0);
> +    htab_save_end_marker(f);
>  
>      return 0;
>  }
> 

-- 
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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