Re: [PATCH v3 4/7] hw/ppc/spapr: Convert HPTE_DIRTY() macro as hpte_is_dirty() method

[Nicholas Piggin]

On Thu Dec 19, 2024 at 4:21 AM AEST, Philippe Mathieu-Daudé wrote:
> Convert HPTE_DIRTY() macro as hpte_is_dirty() method.
> Since sPAPR is in big endian configuration at reset,
> use the big endian LD/ST API to access the HPTEs.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

All the other helper changes look good +/- suggestions from the
first one.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>

> ---
>  hw/ppc/spapr.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index b67ab1ee685..5bc49598a97 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -1411,7 +1411,11 @@ static bool hpte_is_valid(SpaprMachineState *s, 
> unsigned index)
>      return ldq_be_p(hpte_get(s, index)) & HPTE64_V_VALID;
>  }
>  
> -#define HPTE_DIRTY(_hpte)  (tswap64(*((uint64_t *)(_hpte))) & 
> HPTE64_V_HPTE_DIRTY)
> +static bool hpte_is_dirty(SpaprMachineState *s, unsigned index)
> +{
> +    return ldq_be_p(hpte_get(s, index)) & HPTE64_V_HPTE_DIRTY;
> +}
> +
>  #define CLEAN_HPTE(_hpte)  ((*(uint64_t *)(_hpte)) &= 
> tswap64(~HPTE64_V_HPTE_DIRTY))
>  #define DIRTY_HPTE(_hpte)  ((*(uint64_t *)(_hpte)) |= 
> tswap64(HPTE64_V_HPTE_DIRTY))
>  
> @@ -2257,7 +2261,7 @@ static int htab_save_later_pass(QEMUFile *f, 
> SpaprMachineState *spapr,
>  
>          /* Consume non-dirty HPTEs */
>          while ((index < htabslots)
> -               && !HPTE_DIRTY(hpte_get(spapr->htab, index))) {
> +               && !hpte_is_dirty(spapr->htab, index)) {
>              index++;
>              examined++;
>          }
> @@ -2265,7 +2269,7 @@ static int htab_save_later_pass(QEMUFile *f, 
> SpaprMachineState *spapr,
>          chunkstart = index;
>          /* Consume valid dirty HPTEs */
>          while ((index < htabslots) && (index - chunkstart < USHRT_MAX)
> -               && HPTE_DIRTY(hpte_get(spapr->htab, index))
> +               && hpte_is_dirty(spapr->htab, index)
>                 && hpte_is_valid(spapr->htab, index)) {
>              CLEAN_HPTE(hpte_get(spapr->htab, index));
>              index++;
> @@ -2275,7 +2279,7 @@ static int htab_save_later_pass(QEMUFile *f, 
> SpaprMachineState *spapr,
>          invalidstart = index;
>          /* Consume invalid dirty HPTEs */
>          while ((index < htabslots) && (index - invalidstart < USHRT_MAX)
> -               && HPTE_DIRTY(hpte_get(spapr->htab, index))
> +               && hpte_is_dirty(spapr->htab, index)
>                 && !hpte_is_valid(spapr->htab, index)) {
>              CLEAN_HPTE(hpte_get(spapr->htab, index));
>              index++;