On 1/27/20 7:51 AM, Greg Kroah-Hartman wrote:
> On Sun, Jan 26, 2020 at 08:52:33AM -0500, Sasha Levin wrote:
>> On Sat, Jan 25, 2020 at 08:03:25PM -0800, Florian Fainelli wrote:
>>> Hi Greg, Sasha,
>>>
>>> Could you backport upstream commit
>>> de19055564c8f8f9d366f8db3395836da0b2176c ("Documentation: Document arm64
>>> kpti control") to the stable 4.9, 4.14 and 4.19 kernels since they all
>>> support the command line parameter.
>>
>> Hey Florian,
>>
>> We don't normally take documentation patches into stable trees.
>
> Normally we do not, but this is simple enough I've queued it up for 4.19
> and 4.14. Are you sure it is ok for 4.9? If so, Florian, can you
> provide a backported version of it?
Yes, I am positive this parameter is relevant for the stable-4.9 tree, too:
git show linux-stable/linux-4.9.y
static int __init parse_kpti(char *str)
{
bool enabled;
int ret = strtobool(str, &enabled);
if (ret)
return ret;
__kpti_forced = enabled ? 1 : -1;
return 0;
}
early_param("kpti", parse_kpti);
I will be sending you a targeted patch in a short while.
--
Florian
