On Mon, Aug 5, 2013 at 4:51 PM, Alex Villacís Lasso <a_villacis@xxxxxxxxxxxxx> wrote: > I have read that Fedora 18 will be the last Fedora distribution that will > support the armv5tel userspace. I am a bit worried because I have built a > project using the distribution on an armv5tel CPU with custom-built kernels. > From reading > https://fedoraproject.org/wiki/Architectures/ARM/Secret_Decoder_Ring I > understand that the main difference between armv5tel and armv7hl is that > armv5tel forces passing floats on the stack and armv7hl uses the FPU. I was > thinking about the possibility that a CPU model that might have a FPU and > currently runs an armv5tel userspace might be updated to run armv7hl > instead. The end goal is to make the armv5tel system run the Fedora 19 > armv7hl userspace with the custom-built kernel. > > 1) In /proc/cpuinfo, I have seen the "vfp" flag. Does this stand for "vector > floating point", a FPU? Could there be other kinds of FPU that might be > reported as different flags? > 2) If an ARM chipset that is officially armv5tel can be guaranteed to have a > FPU (vfp or otherwise), can it boot an armv7hl userspace with the same > custom-built armv5tel kernel it used before? Do I have to watch out for > specific kernel compile options before attempting this? Unlikely as we optimise for VFPv3 and ARMv5tel only had either v1 or v2 (don't remember which) and I believe architecturally there's quite a difference between them. Peter _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
