Re: [Qemu-devel] [PATCH] fsl-imx6: Swap Ethernet interrupt defines

[Guenter Roeck]

On 03/08/2018 06:51 AM, Peter Maydell wrote:
> On 8 March 2018 at 14:47, Guenter Roeck <address@hidden> wrote:
> > On 03/08/2018 02:50 AM, Peter Maydell wrote:
> > > So do the works-by-accident kernels fail on QEMU because
> > > we don't emulate some bit of the ethernet device ?
> > > Ideally we could fix that so we could boot newer kernels
> > > without breaking the old ones...
>
> > I don't know if a fix working for all versions of Linux is even possible.
> > Creating both interrupts might be an option, but would likely cause
> > other problems since some versions of Linux would handle the same
> > interrupt twice, while others expect the second interrupt
> > to be associated with the timer.
>
> Did the older Linux kernels work on the real hardware? (I
> would guess so, but sometimes these things only get tested
> on emulation...) If so, then in theory "make QEMU work like
> the hardware" should allow all the kernels to work on QEMU.

Good point. I'll assume that this is the case, and have another look.
Unfortunately I don't have real hardware, so it is difficult to observe
the differences for real.

Guenter