Re: [Qemu-devel] Why does qemu not support qemu-system-armeb?

[Peter Maydell]

On 14 June 2014 14:49, Ljun <address@hidden> wrote:
> Hello everyone,I am working on big endian for arm.I change the qemu
> configure and create a qemu-system-armeb,but I want to know qemu whether
> support armeb-softmmu.

The answer to "why is there no qemu-system-armeb" is in two parts:

(1) We don't support big-endian system emulation. There would need
to be work done to implement this beyond just enabling an extra
configuration.

(2) If we did support big-endian system emulation, the right way
to implement this would be to keep it in qemu-system-arm, and
just have the CPU support the various control bits (SCTLR.B,
SCTLR.EE, CPSR.E, etc).

(3) We would need a model of some actual board which used
a CPU in big-endian mode. (These days if it's purely for a
virtual machine you could use the "virt" board, though.)

Are you interested in big-endian emulation:
 * in 64-bit (AArch64/ARM64) ?
 * in 32-bit v7 (what the ARM ARM calls "BE8") ?
 * old-fashioned ARMv5 style ("BE32") ?

thanks
-- PMM