On Wed, Mar 07, 2018 at 09:00:08AM -0600, Shanker Donthineni wrote:
>  static inline void __flush_icache_all(void)
>  {
> -     asm("ic ialluis");
> -     dsb(ish);
> +     /* Instruction cache invalidation is not required for I/D coherence? */
> +     if (!cpus_have_const_cap(ARM64_HAS_CACHE_DIC)) {
> +             asm("ic ialluis");
> +             dsb(ish);
> +     }
>  }

I don't think we need the comment here. We don't have this in the other
cases we look at the ARM64_HAS_CACHE_{IDC,DIC} caps.

This would also be slightly nicer as an early return:

static inline void __flush_icache_all(void)
{
        if (cpus_have_const_cap(ARM64_HAS_CACHE_DIC))
                return;
        
        asm("ic ialluis");
        dsb(ish);
}

... which minimizes indentation, and the diffstat.

The rest looks fine to me, so with the above changes:

Reviewed-by: Mark Rutland <mark.rutl...@arm.com>

Thanks,
Mark.
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