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[PATCH v10 8/8] apic: disable reentrancy detection for apic-msi
From: |
Alexander Bulekov |
Subject: |
[PATCH v10 8/8] apic: disable reentrancy detection for apic-msi |
Date: |
Thu, 27 Apr 2023 17:10:13 -0400 |
As the code is designed for re-entrant calls to apic-msi, mark apic-msi
as reentrancy-safe.
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
---
hw/intc/apic.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/intc/apic.c b/hw/intc/apic.c
index 20b5a94073..ac3d47d231 100644
--- a/hw/intc/apic.c
+++ b/hw/intc/apic.c
@@ -885,6 +885,13 @@ static void apic_realize(DeviceState *dev, Error **errp)
memory_region_init_io(&s->io_memory, OBJECT(s), &apic_io_ops, s,
"apic-msi",
APIC_SPACE_SIZE);
+ /*
+ * apic-msi's apic_mem_write can call into ioapic_eoi_broadcast, which can
+ * write back to apic-msi. As such mark the apic-msi region re-entrancy
+ * safe.
+ */
+ s->io_memory.disable_reentrancy_guard = true;
+
s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, apic_timer, s);
local_apics[s->id] = s;
--
2.39.0
- [PATCH v10 5/8] lsi53c895a: disable reentrancy detection for script RAM, (continued)
[PATCH v10 6/8] bcm2835_property: disable reentrancy detection for iomem, Alexander Bulekov, 2023/04/27
[PATCH v10 2/8] async: Add an optional reentrancy guard to the BH API, Alexander Bulekov, 2023/04/27
[PATCH v10 7/8] raven: disable reentrancy detection for iomem, Alexander Bulekov, 2023/04/27
[PATCH v10 8/8] apic: disable reentrancy detection for apic-msi,
Alexander Bulekov <=
[PATCH v10 4/8] hw: replace most qemu_bh_new calls with qemu_bh_new_guarded, Alexander Bulekov, 2023/04/27