Re: [PATCH 08/17] ppc/pnv: change pnv_pec_stk_update_map() to use PnvPHB4

["Cédric Le Goater" <clg@kaod.org>]

On 1/13/22 20:29, Daniel Henrique Barboza wrote:
> stack->nest_regs_mr wasn't migrated to PnvPHB4 together with phb->nest_regs[] in
> the previous patch. We were unable to cleanly convert its write MemoryRegionOps,
> pnv_pec_stk_nest_xscom_write(), to use PnvPHB4 instead of PnvPhb4PecStack due to
> pnv_pec_stk_update_map() using a stack. Thing is, we're now able to convert
> pnv_pec_stk_update_map() because of what the did in previous patch.
> 
> The need for this intermediate step is a good example of the interconnected
> relationship between stack and phb that we aim to cleanup.
> 
> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

Reviewed-by: Cédric Le Goater <clg@kaod.org>

Thanks,

C.

> ---
>   hw/pci-host/pnv_phb4.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
> index 916a7a3cf0..0f4464ec67 100644
> --- a/hw/pci-host/pnv_phb4.c
> +++ b/hw/pci-host/pnv_phb4.c
> @@ -893,10 +893,10 @@ static void pnv_phb4_update_regions(PnvPHB4 *phb)
>       pnv_phb4_check_all_mbt(phb);
>   }
>   
> -static void pnv_pec_stk_update_map(PnvPhb4PecStack *stack)
> +static void pnv_pec_stk_update_map(PnvPHB4 *phb)
>   {
> +    PnvPhb4PecStack *stack = phb->stack;
>       PnvPhb4PecState *pec = stack->pec;
> -    PnvPHB4 *phb = stack->phb;
>       MemoryRegion *sysmem = get_system_memory();
>       uint64_t bar_en = phb->nest_regs[PEC_NEST_STK_BAR_EN];
>       uint64_t bar, mask, size;
> @@ -1046,7 +1046,7 @@ static void pnv_pec_stk_nest_xscom_write(void *opaque, hwaddr addr,
>           break;
>       case PEC_NEST_STK_BAR_EN:
>           phb->nest_regs[reg] = val & 0xf000000000000000ull;
> -        pnv_pec_stk_update_map(stack);
> +        pnv_pec_stk_update_map(phb);
>           break;
>       case PEC_NEST_STK_DATA_FRZ_TYPE:
>       case PEC_NEST_STK_PBCQ_TUN_BAR:
>