[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20180131123036.GD2521@work-vm>
Date: Wed, 31 Jan 2018 12:30:36 +0000
From: "Dr. David Alan Gilbert" <dgilbert@...hat.com>
To: Borislav Petkov <bp@...e.de>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Christophe de Dinechin <christophe.de.dinechin@...il.com>,
Alan Cox <gnomes@...rguk.ukuu.org.uk>,
Linus Torvalds <torvalds@...ux-foundation.org>,
David Woodhouse <dwmw2@...radead.org>,
Arjan van de Ven <arjan@...ux.intel.com>,
Eduardo Habkost <ehabkost@...hat.com>,
KarimAllah Ahmed <karahmed@...zon.de>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Andi Kleen <ak@...ux.intel.com>,
Andrea Arcangeli <aarcange@...hat.com>,
Andy Lutomirski <luto@...nel.org>,
Ashok Raj <ashok.raj@...el.com>,
Asit Mallick <asit.k.mallick@...el.com>,
Dan Williams <dan.j.williams@...el.com>,
Dave Hansen <dave.hansen@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"H . Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
Janakarajan Natarajan <Janakarajan.Natarajan@....com>,
Joerg Roedel <joro@...tes.org>,
Jun Nakajima <jun.nakajima@...el.com>,
Laura Abbott <labbott@...hat.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Paolo Bonzini <pbonzini@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Radim Krčmář <rkrcmar@...hat.com>,
Tim Chen <tim.c.chen@...ux.intel.com>,
Tom Lendacky <thomas.lendacky@....com>,
KVM list <kvm@...r.kernel.org>,
the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [RFC,05/10] x86/speculation: Add basic IBRS support
infrastructure
* Borislav Petkov (bp@...e.de) wrote:
> On Wed, Jan 31, 2018 at 11:04:07AM +0000, Dr. David Alan Gilbert wrote:
> > That half is the easy bit, we've already got that (thanks to Eduardo),
> > QEMU has -IBRS variants of CPU types, so if you start a VM with
> > -cpu Broadwell-IBRS
>
> Eww, a CPU model with a specific feature bit. I hope you guys don't add
> a model like that for every CPU feature.
Indeed, it's only for this weird case where you suddenly need to change
it.
Dave
> --
> Regards/Gruss,
> Boris.
>
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
> --
--
Dr. David Alan Gilbert / dgilbert@...hat.com / Manchester, UK
Powered by blists - more mailing lists