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ppc/xive: tctx_notify should clear the precluded interrupt

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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>
Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Michael Kowal <kowal@linux.ibm.com>
Reviewed-by: Caleb Schlossin <calebs@linux.ibm.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20250512031100.439842-14-npiggin@gmail.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Nicholas Piggin
2025-07-21 08:03:52 +02:00
committed by Cédric Le Goater
parent ad9175f8a2
commit 14bcc5239f
1 changed files with 3 additions and 0 deletions
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hw/intc/xive.c
+3
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@@ -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));
}
}