On 5/11/2025 10:10 PM, Nicholas Piggin wrote:
When CPPR priority is decreased, pending interrupts do not need to be re-checked if one is already presented because by definition that will be the highest priority. This prevents a presented group interrupt from being lost.
Reviewed-by: Michael Kowal<ko...@linux.ibm.com> Thanks, MAK
Signed-off-by: Nicholas Piggin <npig...@gmail.com> --- hw/intc/xive2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c index 0fdf6a4f20..ace5871706 100644 --- a/hw/intc/xive2.c +++ b/hw/intc/xive2.c @@ -1250,7 +1250,9 @@ static void xive2_tctx_set_cppr(XiveTCTX *tctx, uint8_t sig_ring, uint8_t cppr) }/* CPPR priority decreased (higher value) */- xive2_tctx_process_pending(tctx, sig_ring); + if (!xive_nsr_indicates_exception(sig_ring, nsr)) { + xive2_tctx_process_pending(tctx, sig_ring); + } }void xive2_tm_set_hv_cppr(XivePresenter *xptr, XiveTCTX *tctx,
