[Bug 1881249] Re: CPU fetch from unpopulated ROM on reset

[Philippe Mathieu-Daudé]

Related (invalidated thus rejected) series:

- https://www.mail-archive.com/qemu-devel@nongnu.org/msg683763.html

"Support device reset handler priority configuration"

This series adds support for configuring device reset handler priority, and 
uses it to ensure that the ARMv7-M CPU reset handler is invoked after the ROM 
reset handler.

- https://www.mail-archive.com/qemu-devel@nongnu.org/msg686413.html

"Avoid latent bug calling cpu_reset() on uninitialized vCPU"

cpu_reset() might modify architecture-specific fields allocated
by qemu_init_vcpu(). To avoid bugs similar to the one fixed in
commit 00d0f7cb66 when introducing new architectures, move the
cpu_reset() calls after qemu_init_vcpu().

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https://bugs.launchpad.net/bugs/1881249

Title:
  CPU fetch from unpopulated ROM on reset

Status in QEMU:
  New

Bug description:
  Some architectures fetch the $PC/$SP register as vectors in memory, usually 
ROM.
  The CPU reset() handler is called before the ROM code is populated, resulting 
in fetching incorrect PC/SP.

  Architectures affected:
  - M68K
  - RX
  - ARM M-profile

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