Re: [patch 01/24] x86/speculation: Update the TIF_SSBD comment

[Josh Poimboeuf]

On Thu, Nov 22, 2018 at 12:08:54AM +0100, Borislav Petkov wrote:
> On Wed, Nov 21, 2018 at 05:04:50PM -0600, Josh Poimboeuf wrote:
> > Why not just 'user'?  Like SPECTRE_V2_USER_*.
> 
> Sure, a bit better except that it doesn't explain what it does, I'd say.

But it does describe its purpose, especially in relation to the
'spectre_v2=' option.

Previously 'spectre_v2=' might have been more appropriately named
'spectre_v2_kernel=' because it only protected the kernel from Spectre
v2 attacks.  Now with these new patches, 'spectre_v2=on' will protect
the entire system.

Whereas 'spectre_v2_user=' is a subset of that; it helps protect user
space from itself.  Appending "user" to the existing 'spectre_v2='
option helps to communicate that, IMO.

Now off to eat a giant turkey.

-- 
Josh