Hi, On Mon, Jan 25, 2016 at 05:39:40PM +0100, Diederik de Haas wrote: > On Monday 25 January 2016 14:58:27 Ian Campbell wrote: > > > As I got the impression that support for the RPi was now present in > > > upstream and (therefor) the Debian kernels, > > > > The "therefor" won't happen automatically, someone will need to file a > > wishlist bug asking for the relevant options to be enabled in the Debian > > kernel configuration. > > > > For the RPi's with the newer CPU cores it makes clear sense to do that in > > the armhf/armmp kernel flavour (since it is the "multiplatform" flavour, > > and the only one we want to support). > > I'll give it a try, but first have to learn about the armmp stuff. > > Here is the default kernel configuration for the RPi 2: > https://github.com/raspberrypi/linux/blob/rpi-4.4.y/arch/arm/configs/bcm2709_defconfig > (which does not seem part of > https://sources.debian.net/src/linux/4.4-1~exp1/arch/arm/configs/) The kernel from the Raspberry Pi foundation and the mainline kernel have different config options, so that won't be of much use. Check mainline's arch/arm/configs/bcm2835_defconfig instead. > > For the RPi's with the older cores it wouldn't seem to make much sense to > > enable it in the armel/versatile flavour (because I can't see why it fits > > there, despite folks apparently adding it there), but equally I'm not sure > > we want to be adding new flavours to armel (which is essentially on the > > downward slope of the support lifecycle at this stage). Perhaps others > > around here feel differently though. > > Bummer for me as it won't solve the issue I hoped it would solve, but I'll try > other avenues for that. But still, thanks for clarifying :-) Another option would be adding RPi1 support to the armhf armmp kernel. I guess the benefits of ARMv7 vs ARMv6 is neglectable for the kernel (no floating point operations and Thumb2 should stay disabled because of errata 430973 on some older Cortex-A8s [i.e. on N900]) and one could use armel userland + armmp kernel from armhf. -- Sebastian
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