linux-kernel - Re: [PATCH] KVM: Add wrapper script around QEMU to test kernels

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: <CAOJsxLGetY3ChCAMcEqUGXKsqy44hUB1FK1kR9AHphi9DqbYwQ@mail.gmail.com>
Date:	Mon, 7 Nov 2011 12:18:53 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	Gerd Hoffmann <kraxel@...hat.com>
Cc:	Jan Kiszka <jan.kiszka@....de>, Avi Kivity <avi@...hat.com>,
	"kvm@...r.kernel.org list" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	qemu-devel Developers <qemu-devel@...gnu.org>,
	Alexander Graf <agraf@...e.de>,
	Blue Swirl <blauwirbel@...il.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] KVM: Add wrapper script around QEMU to test kernels

On Mon, Nov 7, 2011 at 12:11 PM, Gerd Hoffmann <kraxel@...hat.com> wrote:
> No support for booting from CDROM.
> No support for booting from Network.
> Thus no way to install a new guest image.

Sure. It's a pain point which we need to fix.

On Mon, Nov 7, 2011 at 12:11 PM, Gerd Hoffmann <kraxel@...hat.com> wrote:
> Booting an existing qcow2 guest image failed, the guest started throwing
> I/O errors.  And even to try that I had to manually extract the kernel
> and initrd images from the guest.  Maybe you should check with the Xen
> guys, they have a funky 'pygrub' which sort-of automates the
> copy-kernel-from-guest-image process.

QCOW2 support is experimental. The I/O errors are caused by forced
read-only mode.

On Mon, Nov 7, 2011 at 12:11 PM, Gerd Hoffmann <kraxel@...hat.com> wrote:
> Booting the host kernel failed too.  Standard distro kernel.  The virtio
> bits are modular, not statically compiled into the kernel.  kvm tool
> can't handle that.

I think we have some support for booting modular distro kernels too if
you tell KVM tool where to find initrd. It sucks out-of-the-box though
because nobody seems to be using it.

On Mon, Nov 7, 2011 at 12:11 PM, Gerd Hoffmann <kraxel@...hat.com> wrote:
> You have to build your own kernel and make sure you flip the correct
> config bits, then you can boot it to a shell prompt.  Trying anything
> else just doesn't work today ...

What can I say? Patches welcome? :-)

                        Pekka
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/