Re: [Qemu-devel] [PATCH v2 1/3] cpu: make CPU_INTERRUPT_RESET available on all targets

[Peter Maydell]

On 6 March 2013 17:13, Paolo Bonzini <address@hidden> wrote:
> Il 06/03/2013 03:02, Peter Crosthwaite ha scritto:
>> If you truly have connectivity from device land to the CPU cluster
>> should that be reflected by some sort of QOM linkage?
>
> I think in real hardware what happens is that a single "wire" is
> distributed to all CPUs.  Devices do not have direct links to all the
> CPUs, they are agnostic of how many CPUs they control (at least on x86).

This is definitely x86 specific. On ARM, typically each core
has its own reset line and the only way to reset all cores is
to assert all the lines.

http://infocenter.arm.com/help/topic/com.arm.doc.ddi0407i/BABGCECJ.html
lists all the reset inputs for an A9MP, for example.

-- PMM