Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device
endianness, defaulting to little endian.
Set the proper endianness on the single machine using the
device.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/ssi/xilinx_spips.h |  1 +
 hw/arm/xilinx_zynq.c          |  1 +
 hw/ssi/xilinx_spips.c         | 46 ++++++++++++++++++++++++++---------
 3 files changed, 36 insertions(+), 12 deletions(-)

diff --git a/include/hw/ssi/xilinx_spips.h b/include/hw/ssi/xilinx_spips.h
index 7a754bf67a..451c3758b3 100644
--- a/include/hw/ssi/xilinx_spips.h
+++ b/include/hw/ssi/xilinx_spips.h
@@ -101,6 +101,7 @@ typedef struct XilinxQSPIPS XilinxQSPIPS;
 struct XlnxZynqMPQSPIPS {
     XilinxQSPIPS parent_obj;
 
+    bool little_endian_model;
     StreamSink *dma;
     int gqspi_irqline;
 
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index fde4d946b7..bcc0022c17 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -142,6 +142,7 @@ static inline int zynq_init_spi_flashes(uint32_t base_addr, qemu_irq irq,
     int num_ss = is_qspi ? NUM_QSPI_FLASHES : NUM_SPI_FLASHES;
 
     dev = qdev_new(is_qspi ? "xlnx.ps7-qspi" : "xlnx.ps7-spi");
+    qdev_prop_set_bit(dev, "little-endian", true);
     qdev_prop_set_uint8(dev, "num-txrx-bytes", is_qspi ? 4 : 1);
     qdev_prop_set_uint8(dev, "num-ss-bits", num_ss);
     qdev_prop_set_uint8(dev, "num-busses", num_busses);
diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c
index aeb462c3ce..5c6f0dd079 100644
--- a/hw/ssi/xilinx_spips.c
+++ b/hw/ssi/xilinx_spips.c
@@ -1251,17 +1251,32 @@ static MemTxResult lqspi_write(void *opaque, hwaddr offset, uint64_t value,
     return MEMTX_ERROR;
 }
 
-static const MemoryRegionOps lqspi_ops = {
-    .read_with_attrs = lqspi_read,
-    .write_with_attrs = lqspi_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
+static const MemoryRegionOps lqspi_ops[2] = {
+    {
+        .read_with_attrs = lqspi_read,
+        .write_with_attrs = lqspi_write,
+        .endianness = DEVICE_BIG_ENDIAN,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            .min_access_size = 1,
+            .max_access_size = 4
+        },
     },
-    .valid = {
-        .min_access_size = 1,
-        .max_access_size = 4
+    {
+        .read_with_attrs = lqspi_read,
+        .write_with_attrs = lqspi_write,
+        .endianness = DEVICE_LITTLE_ENDIAN,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            .min_access_size = 1,
+            .max_access_size = 4,
+        },
     }
 };
 
@@ -1325,8 +1340,9 @@ static void xilinx_qspips_realize(DeviceState *dev, Error **errp)
     s->num_txrx_bytes = 4;
 
     xilinx_spips_realize(dev, errp);
-    memory_region_init_io(&s->mmlqspi, OBJECT(s), &lqspi_ops, s, "lqspi",
-                          (1 << LQSPI_ADDRESS_BITS) * 2);
+    memory_region_init_io(&s->mmlqspi, OBJECT(s),
+                          &lqspi_ops[s->little_endian_model],
+                          s, "lqspi", (1 << LQSPI_ADDRESS_BITS) * 2);
     sysbus_init_mmio(sbd, &s->mmlqspi);
 
     q->lqspi_cached_addr = ~0ULL;
@@ -1432,12 +1448,18 @@ static Property xilinx_spips_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static Property xilinx_qspips_properties[] = {
+    DEFINE_PROP_BOOL("little-endian", XilinxQSPIPS, little_endian_model, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void xilinx_qspips_class_init(ObjectClass *klass, void * data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
 
     dc->realize = xilinx_qspips_realize;
+    device_class_set_props(dc, xilinx_qspips_properties);
     xsc->reg_ops = &qspips_ops;
     xsc->reg_size = XLNX_SPIPS_R_MAX * 4;
     xsc->rx_fifo_size = RXFF_A_Q;
-- 
2.45.2

On 11/7/24 01:22, Philippe Mathieu-Daudé wrote:
> Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
> of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
> Add the "little-endian" property to select the device
> endianness, defaulting to little endian.
> Set the proper endianness on the single machine using the
> device.
> 
> Signed-off-by: Philippe Mathieu-Daudé<philmd@linaro.org>
> ---
>   include/hw/ssi/xilinx_spips.h |  1 +
>   hw/arm/xilinx_zynq.c          |  1 +
>   hw/ssi/xilinx_spips.c         | 46 ++++++++++++++++++++++++++---------
>   3 files changed, 36 insertions(+), 12 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~