Re: [PATCH v2 5/5] arm64/speculation: Support 'mitigations=' cmdline option

Thomas Gleixner
2019-04-24T18:19:22Z

On Wed, 24 Apr 2019, Will Deacon wrote:

> Hi Thomas,
>
> On Tue, Apr 16, 2019 at 09:26:13PM +0200, Thomas Gleixner wrote:
> > On Fri, 12 Apr 2019, Josh Poimboeuf wrote:
> >
> > > Configure arm64 runtime CPU speculation bug mitigations in accordance
> > > with the 'mitigations=' cmdline option. This affects Meltdown, Spectre
> > > v2, and Speculative Store Bypass.
> > >
> > > The default behavior is unchanged.
> > >
> > > Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
> > > ---
> > > NOTE: This is based on top of Jeremy Linton's patches:
> > > https://lkml.kernel.org/r/20190410231237.52506-1-jeremy.linton@arm.com
> >
> > So I keep that out and we have to revisit that once the ARM64 stuff hits a
> > tree, right? I can have a branch with just the 4 first patches applied
> > which ARM64 folks can pull in when they apply Jeremy's patches before te
> > merge window.
>
> I'm assuming that this refers to the core/speculation branch in tip:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/log/?h=core/speculation
>
> but please can you confirm that I'm good to pull that into arm64?

Yes. It's all yours :)

Thanks,

tglx