[PATCH] hw/arm/mps2: Configure the AN500 CPU with 16 MPU regions

[Peter Maydell <peter.maydell@linaro.org>]

The AN500 application note documents that it configures the Cortex-M7
CPU to have 16 MPU regions. We weren't doing this in our emulation,
so the CPU had only the default 8 MPU regions. Set the mpu-ns-regions
property to 16 for this board.

This bug doesn't affect any of the other board types we model in
this source file, because they all use either the Cortex-M3 or
Cortex-M4. Those CPUs do not have an RTL configurable number of
MPU regions, and always provide 8 regions if the MPU is built in.

Cc: qemu-stable@nongnu.org
Reported-by: Corentin GENDRE <cocotroupe20@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/mps2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index 58efb41e6db..50e1a1c1c80 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -224,7 +224,11 @@ static void mps2_common_init(MachineState *machine)
     switch (mmc->fpga_type) {
     case FPGA_AN385:
     case FPGA_AN386:
+        qdev_prop_set_uint32(armv7m, "num-irq", 32);
+        break;
     case FPGA_AN500:
+        /* The AN500 configures its Cortex-M7 with 16 MPU regions */
+        qdev_prop_set_uint32(armv7m, "mpu-ns-dregions", 16);
         qdev_prop_set_uint32(armv7m, "num-irq", 32);
         break;
     case FPGA_AN511:
-- 
2.43.0