Am 17.09.2014 um 17:50 schrieb Ard Biesheuvel:
> On 9 September 2014 11:14, Peter Maydell <peter.mayd...@linaro.org> wrote:
>> On 5 September 2014 16:15, Ard Biesheuvel <ard.biesheu...@linaro.org> wrote:
>>> When booting with -bios or -pflash rather than -kernel, we need to make sure
>>> reset handlers are registered.
>>>
>>> Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
>>> ---
>>> hw/arm/boot.c | 4 ++++
>>> 1 file changed, 4 insertions(+)
>>>
>>> diff --git a/hw/arm/boot.c b/hw/arm/boot.c
>>> index 8f5649a250fd..0cfc11d42962 100644
>>> --- a/hw/arm/boot.c
>>> +++ b/hw/arm/boot.c
>>> @@ -473,6 +473,10 @@ void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info
>>> *info)
>>> }
>>> }
>>>
>>> + for (; cs; cs = CPU_NEXT(cs)) {
>>> + qemu_register_reset(do_cpu_reset, ARM_CPU(cs));
>>> + }
>>> +
>>> /* If no kernel specified, do nothing; we will start from address 0
>>> * (typically a boot ROM image) in the same way as hardware.
>>> */
>>
>> Andreas, with QOM CPUs who is supposed to be responsible
>> for causing them to be reset when qemu_system_reset()
>> happens? At the moment for ARM it doesn't happen at all
>> unless you happened to pass -kernel. This patch makes
>> boot.c register the reset handlers, but that seems
>> a bit odd to me (among other things, it won't work
>> for v7M).
>>
>
> Has there been any discussion on this topic in the mean time?
No, thanks for the ping.
IIRC each machine is responsible for registering a reset hook that calls
- in most cases - cpu_reset().
The thing to look out for here is, does any machine already register a
reset hook and would reset twice with this patch? What's the issue with
v7-M?
Regards,
Andreas
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