On Thu, Sep 14, 2023 at 6:15 PM Andrew Jones <ajones@xxxxxxxxxxxxxxxx> wrote:
>
> On Thu, Sep 14, 2023 at 10:52:15AM +0100, Conor Dooley wrote:
> > On Thu, Sep 14, 2023 at 11:36:01AM +0200, Andrew Jones wrote:
> > > > +static inline void cpu_relax(void)
> > > > +{
> > > > +#ifdef __riscv_zihintpause
> > > > + asm volatile("pause" ::: "memory");
> > > > +#else
> > > > + /* Encoding of the pause instruction */
> > > > + asm volatile(".4byte 0x100000F" ::: "memory");
> > > > +#endif
> > > > +}
> > >
> > > cpu_relax() should go to include/riscv/processor.h
> >
> > Can the one from asm/vdso/processor.h be reused, or are there special
> > considerations preventing that?
>
> We'd need to copy it into tools/arch/riscv/include/asm, but it could be
> done. Hmm, now that I look at it, I see we're missing the barrier() call
> in this kvm selftests version.
>
Will reuse the one from asm/vdso/processor.h and copy it to
tools/arch/riscv/include/asm.
> Thanks,
> drew
