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[PATCH v8 7/8] bcm2835_property: disable reentrancy detection for iomem
From: |
Alexander Bulekov |
Subject: |
[PATCH v8 7/8] bcm2835_property: disable reentrancy detection for iomem |
Date: |
Fri, 21 Apr 2023 10:27:35 -0400 |
As the code is designed for re-entrant calls from bcm2835_property to
bcm2835_mbox and back into bcm2835_property, mark iomem as
reentrancy-safe.
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
---
hw/misc/bcm2835_property.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index 890ae7bae5..de056ea2df 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -382,6 +382,13 @@ static void bcm2835_property_init(Object *obj)
memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
TYPE_BCM2835_PROPERTY, 0x10);
+
+ /*
+ * bcm2835_property_ops call into bcm2835_mbox, which in-turn reads from
+ * iomem. As such, mark iomem as re-entracy safe.
+ */
+ s->iomem.disable_reentrancy_guard = true;
+
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
}
--
2.39.0
- [PATCH v8 0/8] memory: prevent dma-reentracy issues, Alexander Bulekov, 2023/04/21
- [PATCH v8 1/8] memory: prevent dma-reentracy issues, Alexander Bulekov, 2023/04/21
- [PATCH v8 3/8] checkpatch: add qemu_bh_new/aio_bh_new checks, Alexander Bulekov, 2023/04/21
- [PATCH v8 2/8] async: Add an optional reentrancy guard to the BH API, Alexander Bulekov, 2023/04/21
- [PATCH v8 5/8] memory: Allow disabling re-entrancy checking per-MR, Alexander Bulekov, 2023/04/21
- [PATCH v8 4/8] hw: replace most qemu_bh_new calls with qemu_bh_new_guarded, Alexander Bulekov, 2023/04/21
- [PATCH v8 6/8] lsi53c895a: disable reentrancy detection for script RAM, Alexander Bulekov, 2023/04/21
- [PATCH v8 7/8] bcm2835_property: disable reentrancy detection for iomem,
Alexander Bulekov <=
- [PATCH v8 8/8] memory: abort on re-entrancy in debug builds, Alexander Bulekov, 2023/04/21
- Re: [PATCH v8 0/8] memory: prevent dma-reentracy issues, Thomas Huth, 2023/04/25