** Information type changed from Public Security to Public -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1812091
Title: ARMv8-M boots in wrong security mode Status in QEMU: New Bug description: Qemu-commit: b2f7c27f56bf1116ebb7848c75914aa7c5d6a040 The ARMv8-M architecture (with security extensions) contains a SAU, the Security Attribution Unit. After booting the mps2-an505 and immediately halting (`-S`), I attempt to read the SAU_TYPE register, located at 0xE000EDD4, using gdb (x 0xE000EDD4). The returned value is 0, while the expected value is 8 (number of regions). On further investigation, it seems that `attrs.secure` is set to false (armv7m_nvic.c - nvic_readl, line 1167). Commenting out the check will return the correct value. As the CPU should be in 'secure' mode after reset, I think this behavior is wrong. Steps to reproduce: Example code that loads an endless loop into the beginning of secure memory: https://github.com/ajblane/armv8m-hello Commandline: qemu-system-arm -machine mps2-an505 -cpu cortex-m33 \ -m 4096 \ -nographic -serial mon:stdio \ -kernel $(IMAGE) -s -S Attach with arm-none-eabi-gdb, and run x 0xE000EDD4. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1812091/+subscriptions
