Re: [RFC 10/10] x86/enter: Use IBRS on syscall and interrupts

[KarimAllah Ahmed]

On 01/21/2018 02:50 PM, Konrad Rzeszutek Wilk wrote:

> On Sat, Jan 20, 2018 at 08:23:01PM +0100, KarimAllah Ahmed wrote:
> > From: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
> >
> > Stop Indirect Branch Speculation on every user space to kernel space
> > transition and reenable it when returning to user space./
> How about interrupts?
>
> That is should .macro interrupt have the same treatment?

RESTRICT_IB_SPEC is called in switch_to_thread_stack which is almost the 
first thing called from ".macro interrupt".

>

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