Re: [RFC PATCH 27/27] powerpc/64s: system call support for scv/rfscv instructions

2019-10-02 Thread Michal Suchánek
On Sun, Sep 15, 2019 at 11:28:13AM +1000, Nicholas Piggin wrote: > Add support for the scv instruction on POWER9 and later CPUs. > > For now this implements the zeroth scv vector 'scv 0', as identical > to 'sc' system calls, with the exception that lr is not preserved, and > it is 64-bit only. The

[RFC PATCH 27/27] powerpc/64s: system call support for scv/rfscv instructions

2019-09-14 Thread Nicholas Piggin
Add support for the scv instruction on POWER9 and later CPUs. For now this implements the zeroth scv vector 'scv 0', as identical to 'sc' system calls, with the exception that lr is not preserved, and it is 64-bit only. There may yet be changes made to this ABI, so it's for testing only. This als