linux-kernel - Re: [patch V2 15/16] x86/iopl: Remove legacy IOPL option

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.21.1911122040020.1833@nanos.tec.linutronix.de>
Date:   Tue, 12 Nov 2019 20:40:52 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Andy Lutomirski <luto@...nel.org>
cc:     LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Linus Torvalds <torvalds@...uxfoundation.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Willy Tarreau <w@....eu>, Juergen Gross <jgross@...e.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [patch V2 15/16] x86/iopl: Remove legacy IOPL option

On Tue, 12 Nov 2019, Andy Lutomirski wrote:
> On Mon, Nov 11, 2019 at 2:35 PM Thomas Gleixner <tglx@...utronix.de> wrote:
> >
> > From: Thomas Gleixner <tglx@...utronix.de>
> >
> > The IOPL emulation via the I/O bitmap is sufficient. Remove the legacy
> > cruft dealing with the (e)flags based IOPL mechanism.
> 
> Acked-by: Andy Lutomirski <luto@...nel.org>
> 
> But I think you could simplify a little bit and have a single config
> option that controls the iopl() and iopl() syscalls.

You mean turning off both iopl() and ioperm() in one go. Yes, that'd be
possible. Let me look.

Thanks,

	tglx