Re: [PATCH] x86/doc: add PTI description

From: Thomas Gleixner
Date: Thu Jan 04 2018 - 16:46:51 EST


On Thu, 4 Jan 2018, Dave Hansen wrote:
>
> - pti= [X86_64]
> + pti= [X86_64] Disable Page Table Isolation of user and

That description is definitely wrong....

> + kernel address spaces. Disabling this feature
> + removes hardening, but improves performance of
> + system calls and interrupts.
> +
> Control user/kernel address space isolation:
> on - enable
> off - disable
> auto - default setting
>
> + nopti [X86_64]
> + Equivalent to pti=off
> +
> pty.legacy_count=
> [KNL] Number of legacy pty's. Overwrites compiled-in
> default number.

Thanks,

tglx