[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <a16919d7e6504ad59a0fad828690bcb9@AcuMS.aculab.com>
Date: Mon, 15 Oct 2018 13:14:06 +0000
From: David Laight <David.Laight@...LAB.COM>
To: 'Jan Kiszka' <jan.kiszka@...mens.com>,
Andy Lutomirski <luto@...nel.org>
CC: Joerg Roedel <joro@...tes.org>,
Thomas Gleixner <tglx@...utronix.de>,
"Ingo Molnar" <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
Linux-MM <linux-mm@...ck.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
"Dave Hansen" <dave.hansen@...el.com>,
Josh Poimboeuf <jpoimboe@...hat.com>,
"Juergen Gross" <jgross@...e.com>,
Peter Zijlstra <peterz@...radead.org>,
"Borislav Petkov" <bp@...en8.de>, Jiri Kosina <jkosina@...e.cz>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Brian Gerst <brgerst@...il.com>,
Denys Vlasenko <dvlasenk@...hat.com>,
Eduardo Valentin <eduval@...zon.com>,
Greg KH <gregkh@...uxfoundation.org>,
Will Deacon <will.deacon@....com>,
"Liguori, Anthony" <aliguori@...zon.com>,
Daniel Gruss <daniel.gruss@...k.tugraz.at>,
Hugh Dickins <hughd@...gle.com>,
Kees Cook <keescook@...gle.com>,
"Andrea Arcangeli" <aarcange@...hat.com>
Subject: RE: [PATCH] x86/entry/32: Fix setup of CS high bits
From: Jan Kiszka
> Sent: 15 October 2018 14:09
...
> > Those fields are genuinely 16 bit. So the comment should say
> > something like "Those high bits are used for CS_FROM_ENTRY_STACK and
> > CS_FROM_USER_CR3".
>
> /*
> * The high bits of the CS dword (__csh) are used for
> * CS_FROM_ENTRY_STACK and CS_FROM_USER_CR3. Clear them in case
> * hardware didn't do this for us.
> */
What's a 'dword' ? :-)
On a 32bit processor a 'word' will be 32 bits to a 'double-word'
would be 64 bits.
One of the worst names to use.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
Powered by blists - more mailing lists