Re: [PATCH 5/7] x86/cpu: Enable LASS (Linear Address Space Separation)

From: Sohil Mehta
Date: Fri Jan 13 2023 - 14:41:22 EST


Adding folks from the previous discussion when a similar suggestion was
made by Kees. There didn't seem to be any major objection that time.

https://lore.kernel.org/lkml/202205111424.DEB0E3418@keescook/

On 1/12/2023 5:17 PM, Sohil Mehta wrote:
> We can make CONFIG_LEGACY_VSYSCALL_NONE as the default instead of the
> current CONFIG_LEGACY_VSYSCALL_XONLY. The kernel can disable LASS at
> boot time if a user/admin has shown explicit preference by selecting
> CONFIG_LEGACY_VSYSCALL_XONLY or by providing command line parameter
> vsyscall=xonly/emulate.
>
> Thoughts?