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

[Nicholas Piggin]

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 <npiggin@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));
     }
 }
 
-- 
2.47.1