On Tue, 2011-08-09 at 23:15 +0300, Pekka Enberg wrote: > On Tue, Aug 9, 2011 at 11:06 PM, Sasha Levin <[email protected]> wrote: > > On Tue, 2011-08-09 at 19:59 +0300, Avi Kivity wrote: > >> On 08/09/2011 06:33 PM, Pekka Enberg wrote: > >> > This patch updates 'kvm run' to boot to host filesystem via 9p '/bin/sh' > >> > by > >> > default: > >> > > >> > $ ./kvm run > >> > # kvm run -k ../../arch/x86/boot/bzImage -m 320 -c 2 --name > >> > guest-3462 > >> > [ 0.000000] Linux version 3.1.0-rc1+ (penberg@tiger) (gcc version > >> > 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #7 SMP PREEMPT Tue Aug 9 16:39:20 EEST > >> > 2011 > >> > [ 0.000000] Command line: notsc noapic noacpi pci=conf1 reboot=k > >> > panic=1 console=ttyS0 earlyprintk=serial init=/bin/sh root=/dev/vda rw > >> > root=/dev/root rootflags=rw,trans=virtio,version=9p2000.u rootfstype=9p > >> > > >> > [snip] > >> > > >> > [ 1.803261] VFS: Mounted root (9p filesystem) on device 0:13. > >> > [ 1.805153] devtmpfs: mounted > >> > [ 1.808353] Freeing unused kernel memory: 924k freed > >> > [ 1.810592] Write protecting the kernel read-only data: 12288k > >> > [ 1.816268] Freeing unused kernel memory: 632k freed > >> > [ 1.826030] Freeing unused kernel memory: 1448k freed > >> > sh: cannot set terminal process group (-1): Inappropriate ioctl for > >> > device > >> > sh: no job control in this shell > >> > sh-4.1# > >> > > >> > >> Most kernels won't have 9p built-in, so how about building a tiny initrd > >> to load the needed modules? > >> > >> btw, I get > >> > >> # ./kvm run > >> # kvm run -k ../../arch/x86/boot/bzImage -m 1728 -c 24 --name > >> guest-10193 > >> <hang> > >> > > > > This is usually the case of missing serial console support in the guest > > kernel. > > > > You can either enable these: > > CONFIG_SERIAL_8250=y > > CONFIG_SERIAL_8250_CONSOLE=y > > > > Switch to virtio console using '--console virtio', or boot into a > > graphical console using '--sdl' or '--vnc'. > > Can we somehow sanely detect that the kernel doesn't support serial > console and switch to virtio console?
Probably, will look into it tomorrow. -- Sasha. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
