linux-kernel - RE: [PATCH 0/7] IBRS patch series

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Date:   Fri, 5 Jan 2018 14:52:33 +0000
From:   "Van De Ven, Arjan" <arjan.van.de.ven@...el.com>
To:     Andrea Arcangeli <aarcange@...hat.com>
CC:     Linus Torvalds <torvalds@...ux-foundation.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "Andi Kleen" <ak@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 0/7] IBRS patch series

> 
> Doing a huge amount of work with reptoline and then you find SMM is
> called reproducibly somehow and a new PoC could exist for it, not fun.

retpoline we want for broadwell and earlier anyway..

I'm sorry but your whole statement reeks a little bit of "perfect is the enemy of good"