From: Nicholas Piggin <npig...@gmail.com>
Group interrupts should not be taken from the backlog and presented
if they are precluded by CPPR.
Fixes: 855434b3b8 ("ppc/xive2: Process group backlog when pushing an OS
context")
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
Reviewed-by: Glenn Miles <mil...@linux.ibm.com>
Reviewed-by: Michael Kowal <ko...@linux.ibm.com>
Reviewed-by: Caleb Schlossin <cal...@linux.ibm.com>
Tested-by: Gautam Menghani <gau...@linux.ibm.com>
Link:
https://lore.kernel.org/qemu-devel/20250512031100.439842-12-npig...@gmail.com
Signed-off-by: Cédric Le Goater <c...@redhat.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 c23933f8f550..181d1ae5f940 100644
--- a/hw/intc/xive2.c
+++ b/hw/intc/xive2.c
@@ -845,7 +845,9 @@ static void xive2_tctx_need_resend(Xive2Router *xrtr,
XiveTCTX *tctx,
group_prio = xive2_presenter_backlog_scan(xptr, nvp_blk, nvp_idx,
first_group, &group_level);
regs[TM_LSMFB] = group_prio;
- if (regs[TM_LGS] && group_prio < backlog_prio) {
+ if (regs[TM_LGS] && group_prio < backlog_prio &&
+ group_prio < regs[TM_CPPR]) {
+
/* VP can take a group interrupt */
xive2_presenter_backlog_decr(xptr, nvp_blk, nvp_idx,
group_prio, group_level);
--
2.50.1
