Re: [Qemu-devel] when does a target frontend need to use gen_io_start()/gen_io_end() ?

[Paolo Bonzini]

On 13/05/2015 08:57, Pavel Dovgaluk wrote:
>> > It's any instruction that can cause an icount read, typically through
>> > QEMU_CLOCK_VIRTUAL or cpu_get_ticks().
> Doesn't this mean that ARM has incorrect implementation of icount?
> MMIO is common for this platform, but none of memory accesses are
> surrounded with gen_io_start()/gen_io_end().

See here:

    if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu_can_do_io(cpu)) {
        cpu_io_recompile(cpu, retaddr);
    }

in softmmu_template.h.

Paolo