On 12 May 2014 08:47, Andreas Färber <address@hidden> wrote:
Am 02.05.2014 16:33, schrieb Paolo Bonzini:
On the x86, some devices need access to the CPU reset pin (INIT#).
Provide a generic service to do this, using one of the internal
cpu_interrupt targets. Generalize the PPC-specific code for
CPU_INTERRUPT_RESET to other targets.
Since PPC does not support migration across QEMU versions (its
machine types are not versioned yet), I picked the value that
is used on x86, CPU_INTERRUPT_TGT_INT_1. Consequently, TGT_INT_2
and TGT_INT_3 are shifted down by one while keeping their value.
No objection from my side, but I thought there had been agreement among
Anthony, Peter and others that soft-reset is nothing generic that can be
implemented as API?
s390x has multiple ways to do resets, same for ppc, and I thought the
suggested way to implement them was a qemu_irq in the particular piece
of hardware together with custom reset functions as done for s390x?
I think the right way to expose reset to the outside world is via
a qemu_irq line, yes, but possibly the implementation inside the
CPU object might use a CPU_INTERRUPT_* bit (compare the way
that ARM IRQ and FIQ are qemu_irq lines to the outside world
but operate by just setting bits for the mainloop to check).