diff mbox series

[PULL,06/45] xlnx-versal-ospi: disable reentrancy detection for iomem_dac

Message ID 20240227133314.1721857-7-peter.maydell@linaro.org
State Accepted
Commit 3b3e4c2803a58ddc14f37d05c7d0e2a3f749bc67
Headers show
Series [PULL,01/45] hw/arm/sbsa-ref: Simplify init since PCIe is always enabled | expand

Commit Message

Peter Maydell Feb. 27, 2024, 1:32 p.m. UTC 
From: Sai Pavan Boddu <sai.pavan.boddu@amd.com>

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>
Message-id: 20240219105637.65052-1-sai.pavan.boddu@amd.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/ssi/xlnx-versal-ospi.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/hw/ssi/xlnx-versal-ospi.c b/hw/ssi/xlnx-versal-ospi.c
index c7b95b1f377..c479138ec1c 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);