[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Xen-devel] [PATCH v3] x86: use a read-only IDT alias on all CPUs
- To: Ingo Molnar <mingo@xxxxxxxxxx>
- From: Andi Kleen <andi@xxxxxxxxxxxxxx>
- Date: Thu, 11 Apr 2013 04:50:14 -0700
- Cc: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Alex Shi <alex.shi@xxxxxxxxx>, Will Drewry <wad@xxxxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Julien Tinnes <jln@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Frederic Weisbecker <fweisbec@xxxxxxxxx>, Dan Rosenberg <drosenberg@xxxxxxxxxxxxx>, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Steven Rostedt <rostedt@xxxxxxxxxxx>, Borislav Petkov <borislav.petkov@xxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, kernel-hardening@xxxxxxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 11 Apr 2013 11:50:39 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
Ingo Molnar <mingo@xxxxxxxxxx> writes:
>
> This looks very nice to me now. Peter, any objections?
it seems pointless without randomized main kernel text location, because
the IDT will be still at a known per kernel fixed writable location in
the direct mapping.
As long as such randomization is not there it just wastes a TLB entry.
-Andi
--
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel
|
