Re: [PATCH 13/50] ppc/xive: tctx_notify should clear the precluded interrupt

[Miles Glenn]

Reviewed-by: Glenn Miles <mil...@linux.ibm.com>

On Mon, 2025-05-12 at 13:10 +1000, Nicholas Piggin wrote:
> If CPPR is lowered to preclude the pending interrupt, NSR should be
> cleared and the qemu_irq should be lowered. This avoids some cases
> of supurious interrupts.
> 
> Signed-off-by: Nicholas Piggin <npig...@gmail.com>
> ---
>  hw/intc/xive.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
> index cebe409a1a..6293ea4361 100644
> --- a/hw/intc/xive.c
> +++ b/hw/intc/xive.c
> @@ -110,6 +110,9 @@ void xive_tctx_notify(XiveTCTX *tctx, uint8_t ring, 
> uint8_t group_level)
>                                 regs[TM_IPB], alt_regs[TM_PIPR],
>                                 alt_regs[TM_CPPR], alt_regs[TM_NSR]);
>          qemu_irq_raise(xive_tctx_output(tctx, ring));
> +    } else {
> +        alt_regs[TM_NSR] = 0;
> +        qemu_irq_lower(xive_tctx_output(tctx, ring));
>      }
>  }
>