Re: [PATCH] arm64: Work around Falkor erratum 1009

Catalin Marinas
2016-12-08T13:27:53Z

On Thu, Dec 08, 2016 at 11:45:12AM +0000, Mark Rutland wrote:
> On Wed, Dec 07, 2016 at 03:04:31PM -0500, Christopher Covington wrote:
> > + asm volatile(ALTERNATIVE(
> > + "nop \n"
> > + "nop \n",
> > + "tlbi vmalle1is \n"
> > + "dsb ish \n",
>
> As a general note, perhaps we want a C compatible NOP_ALTERNATIVE() so
> that the nop case can be implicitly generated for sequences like this.

It's also worth checking what cpus_have_const_cap() would generate for
the default (no workaround required) case.

--
Catalin