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ppc/xive2: Prevent pulling of pool context losing phys interrupt

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When the pool context is pulled, the shared pool/phys signal is
reset, which loses the qemu irq if a phys interrupt was presented.

Only reset the signal if a poll irq was presented.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Michael Kowal <kowal@linux.ibm.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20250512031100.439842-42-npiggin@gmail.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Nicholas Piggin
2025-07-21 08:03:53 +02:00
committed by Cédric Le Goater
parent 365e322cfb
commit 7a40b50757
1 changed files with 10 additions and 8 deletions
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hw/intc/xive2.c
+10 -8
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@@ -727,20 +727,22 @@ static uint64_t xive2_tm_pull_ctx(XivePresenter *xptr, XiveTCTX *tctx,
xive2_redistribute(xrtr, tctx, cur_ring);
}
}
/*
* Lower external interrupt line of requested ring and below except for
* USER, which doesn't exist.
*/
if (xive_nsr_indicates_exception(cur_ring, nsr)) {
if (cur_ring == xive_nsr_exception_ring(cur_ring, nsr)) {
xive_tctx_reset_signal(tctx, cur_ring);
}
}
}
if (xive2_router_get_config(xrtr) & XIVE2_VP_SAVE_RESTORE && do_save) {
xive2_tctx_save_ctx(xrtr, tctx, ring, nvp_blk, nvp_idx);
}
/*
* Lower external interrupt line of requested ring and below except for
* USER, which doesn't exist.
*/
for (cur_ring = TM_QW1_OS; cur_ring <= ring;
cur_ring += XIVE_TM_RING_SIZE) {
xive_tctx_reset_signal(tctx, cur_ring);
}
return target_ringw2;
}