Re: [Qemu-devel] qemu-system-sh4 -M r2d serial is broken.

[Rob Landley]

On 05/18/2017 02:00 PM, Aurelien Jarno wrote:
> On 2017-05-18 11:08, Rob Landley wrote:
>> Serial input hangs after the first character in the 4.11 kernel:
>>
>>   http://www.spinics.net/lists/linux-sh/msg51183.html
>>
>> Because they enabled support for a buffer size thing QEMU doesn't
>> emulate right:
>>
>>   http://www.spinics.net/lists/linux-sh/msg51189.html
> 
> Indeed the SCIF emulation in QEMU is quite limited. The problem is that
> it exposes many internal states to the software (and that's the same for
> the SH4 CPU in general), and that's not really compatible with quick
> emulation. In that case the timer should depend on the baud rate which
> we don't really emulate.
> 
> I'll try to have a look, that said my test environment is stuck with
> kernel 4.8 due to the broken futex support on UP in kernel 4.9 (and
> that's not QEMU specific). I'll try to build a more recent kernel with
> additional patches.

I thought Rich fixed that. Rich?

I'm doing a new https://github.com/landley/mkroot thing on top of Rich's
musl-cross-make toolchain, but it's still cooking and the kernels it
builds are really simple so far.

Rob