linux-kernel - Re: [PATCH 2/2] KVM: VMX: Add Force Emulation Prefix for "emulate the next instruction"

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20180327045558.GC16974@char.us.oracle.com>
Date:   Tue, 27 Mar 2018 00:55:58 -0400
From:   Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:     Wanpeng Li <kernellwp@...il.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Andrew Cooper <andrew.cooper3@...rix.com>
Subject: Re: [PATCH 2/2] KVM: VMX: Add Force Emulation Prefix for "emulate
 the next instruction"

On Tue, Mar 27, 2018 at 12:40:20AM -0400, Konrad Rzeszutek Wilk wrote:
> On Mon, Mar 26, 2018 at 07:12:15PM -0700, Wanpeng Li wrote:
> > From: Wanpeng Li <wanpengli@...cent.com>
> > 
> > This patch introduces a Force Emulation Prefix (ud2a; .ascii "kvm") for 
> > "emulate the next instruction", the codes will be executed by emulator 
> > instead of processor, for testing purposes.
> 
> Can you expand a bit ? Why do you want this in KVM in the first place?
> Should this be controlled by a boolean parameter? 

.. per guest. That is instead of a global one, have a per guest one?