Re: [PATCH v3 5/7] hw/ppc/spapr: Convert CLEAN_HPTE() macro as hpte_set_clean() method

[Nicholas Piggin]

On Thu Dec 19, 2024 at 4:21 AM AEST, Philippe Mathieu-Daudé wrote:
> Convert CLEAN_HPTE() macro as hpte_set_clean() method.
> Since sPAPR is in big endian configuration at reset,
> use the big endian LD/ST API to access the HPTEs.
>

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

> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/ppc/spapr.c | 15 ++++++++++-----
>  1 file changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 5bc49598a97..4e1fe832c29 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -1416,7 +1416,12 @@ 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))
> +static void hpte_set_clean(SpaprMachineState *s, unsigned index)
> +{
> +    stq_be_p(hpte_get(s, index),
> +             ldq_be_p(hpte_get(s, index)) & ~HPTE64_V_HPTE_DIRTY);
> +}
> +
>  #define DIRTY_HPTE(_hpte)  ((*(uint64_t *)(_hpte)) |= 
> tswap64(HPTE64_V_HPTE_DIRTY))
>  
>  /*
> @@ -2213,7 +2218,7 @@ static void htab_save_first_pass(QEMUFile *f, 
> SpaprMachineState *spapr,
>          /* Consume invalid HPTEs */
>          while ((index < htabslots)
>                 && !hpte_is_valid(spapr->htab, index)) {
> -            CLEAN_HPTE(hpte_get(spapr->htab, index));
> +            hpte_set_clean(spapr->htab, index);
>              index++;
>          }
>  
> @@ -2221,7 +2226,7 @@ static void htab_save_first_pass(QEMUFile *f, 
> SpaprMachineState *spapr,
>          chunkstart = index;
>          while ((index < htabslots) && (index - chunkstart < USHRT_MAX)
>                 && hpte_is_valid(spapr->htab, index)) {
> -            CLEAN_HPTE(hpte_get(spapr->htab, index));
> +            hpte_set_clean(spapr->htab, index);
>              index++;
>          }
>  
> @@ -2271,7 +2276,7 @@ static int htab_save_later_pass(QEMUFile *f, 
> SpaprMachineState *spapr,
>          while ((index < htabslots) && (index - chunkstart < USHRT_MAX)
>                 && hpte_is_dirty(spapr->htab, index)
>                 && hpte_is_valid(spapr->htab, index)) {
> -            CLEAN_HPTE(hpte_get(spapr->htab, index));
> +            hpte_set_clean(spapr->htab, index);
>              index++;
>              examined++;
>          }
> @@ -2281,7 +2286,7 @@ static int htab_save_later_pass(QEMUFile *f, 
> SpaprMachineState *spapr,
>          while ((index < htabslots) && (index - invalidstart < USHRT_MAX)
>                 && hpte_is_dirty(spapr->htab, index)
>                 && !hpte_is_valid(spapr->htab, index)) {
> -            CLEAN_HPTE(hpte_get(spapr->htab, index));
> +            hpte_set_clean(spapr->htab, index);
>              index++;
>              examined++;
>          }