From: Paolo Bonzini <pbonzini@redhat.com>
To: Yacine HEBBAL <y_hebbal@esi.dz>, kvm@vger.kernel.org
Subject: Re: [Question] Switching VCPU CPL from the hypervisor ?
Date: Tue, 15 Dec 2015 17:53:12 +0100 [thread overview]
Message-ID: <56704578.8080803@redhat.com> (raw)
In-Reply-To: <loom.20151215T170603-716@post.gmane.org>
On 15/12/2015 17:20, Yacine HEBBAL wrote:
> Hi,
> I working on an application in which I control an arbitrary process to
> execute an a given code (injected code for example). I want the process I'm
> controlling to execute my code with root privilege. Is it possible to
> arbitrary switch vcpu cpl to 0 from the hypervisor level (process is in user
> mode) ? I'm aware that I can do this using some hacks and emulation or by
> controlling the process just after it enters or just before it quits kernel
> mode (but I need to wait and intercept these events). Is there a
> straightforward technique to switch vcpu cpl from the hypervisor level at
> demand ?
Would a hypercall do? VMCALL can be executed from CPL 3.
Paolo
next prev parent reply other threads:[~2015-12-15 16:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-15 16:20 [Question] Switching VCPU CPL from the hypervisor ? Yacine HEBBAL
2015-12-15 16:53 ` Paolo Bonzini [this message]
2015-12-15 17:12 ` Yacine HEBBAL
[not found] ` <CACEoar5vk6mzeWYwcDsBFVxYfcYm3fyBufwA+BM1ZvP3PL5aVw@mail.gmail.com>
2015-12-16 17:48 ` Paolo Bonzini
2015-12-17 15:58 ` Yacine HEBBAL
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