Messages in this thread | | | Date | Wed, 28 Mar 2018 16:04:53 +0800 | From | Guo Ren <> | Subject | Re: [PATCH 15/19] csky: Build infrastructure |
| |
Hi Arnd,
On Wed, Mar 28, 2018 at 09:40:49AM +0200, Arnd Bergmann wrote: > Ok, thanks for the clarification. Obviously if they are mutually incompatible, > there is no point in using a common kernel, so your current version is > absolutely fine, and this is similar to how we cannot have a common kernel > between ARMv5, ARMv7-A and ARMv7-M, which are all incompatible > at the kernel level. Yes.
> One more question for my understanding: Are the three types of ck8xx > CPUs mutually incompatible in user space as well, or are the differences > only for the kernel? For the ARM example, ARMv5 and ARMv7 > fundamentally require separate kernels, but both can run user space > programs built for ARMv5.
-mcpu=ck807 app could run on ck807, ck810, ck860. -mcpu=ck810 app could run on ck807, ck810, ck860. -mcpu=ck860 app only run on ck860.
They are all incompatible at the kernel level.
Best Regards Guo Ren
| |