Reviewed-by: Glenn Miles <mil...@linux.ibm.com>
On Mon, 2025-05-12 at 13:10 +1000, Nicholas Piggin wrote:
> Pushing a context and loading IPB from NVP is defined to merge ('or')
> that IPB into the TIMA IPB register. PIPR should therefore be calculated
> based on the final IPB value, not just the NVP value.
>
> Fixes: 9d2b6058c5b ("ppc/xive2: Add grouping level to notification")
> Signed-off-by: Nicholas Piggin <npig...@gmail.com>
> ---
> hw/intc/xive2.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c
> index 790152a2a6..4dd04a0398 100644
> --- a/hw/intc/xive2.c
> +++ b/hw/intc/xive2.c
> @@ -835,8 +835,9 @@ static void xive2_tctx_need_resend(Xive2Router *xrtr,
> XiveTCTX *tctx,
> nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, 0);
> xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2);
> }
> + /* IPB bits in the backlog are merged with the TIMA IPB bits */
> regs[TM_IPB] |= ipb;
> - backlog_prio = xive_ipb_to_pipr(ipb);
> + backlog_prio = xive_ipb_to_pipr(regs[TM_IPB]);
> backlog_level = 0;
>
> first_group = xive_get_field32(NVP2_W0_PGOFIRST, nvp.w0);
