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[PATCH v2] xlnx-versal-ospi: disable reentrancy detection for iomem_dac
From: |
Sai Pavan Boddu |
Subject: |
[PATCH v2] xlnx-versal-ospi: disable reentrancy detection for iomem_dac |
Date: |
Mon, 19 Feb 2024 10:56:37 +0000 |
The OSPI DMA reads flash data through the OSPI linear address space (the
iomem_dac region), because of this the reentrancy guard introduced in
commit a2e1753b ("memory: prevent dma-reentracy issues") is disabled for
the memory region.
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@amd.com>
---
Changes for V2:
Added code comments.
hw/ssi/xlnx-versal-ospi.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/ssi/xlnx-versal-ospi.c b/hw/ssi/xlnx-versal-ospi.c
index c7b95b1f37..c479138ec1 100644
--- a/hw/ssi/xlnx-versal-ospi.c
+++ b/hw/ssi/xlnx-versal-ospi.c
@@ -1772,6 +1772,12 @@ static void xlnx_versal_ospi_init(Object *obj)
memory_region_init_io(&s->iomem_dac, obj, &ospi_dac_ops, s,
TYPE_XILINX_VERSAL_OSPI "-dac", 0x20000000);
sysbus_init_mmio(sbd, &s->iomem_dac);
+ /*
+ * The OSPI DMA reads flash data through the OSPI linear address space (the
+ * iomem_dac region), because of this the reentrancy guard needs to be
+ * disabled.
+ */
+ s->iomem_dac.disable_reentrancy_guard = true;
sysbus_init_irq(sbd, &s->irq);
--
2.25.1
- [PATCH v2] xlnx-versal-ospi: disable reentrancy detection for iomem_dac,
Sai Pavan Boddu <=