On Mon, Aug 20, 2012 at 09:39:56PM +0800, Wei Xu wrote: > > Hi All, > > I'm try to set up and verify Xen console driver base on Fedora 17 and Xen > > 4.1.2 with hvm guest mode, > > i searched around and got a link, it give steps both for PV and HVM mode, > > I followed the HVM guide > > and upgraded my kernel to 3.5.0. > > > > http://www.dedoimedo.com/computers/xen-console.html > > > > After that, I can got console output with "xm console <dom_id>", but the > > console driver is not used when I tracing the driver .. I am not sure I understand: "when I tracing the driver" ? Are you referring to the PV driver?

> > with "crash" utility, by examing the "console_drivers", the console driver > > is still "serial8250 console", so i wonder if I didn't > > set up it properly or something else, is there someone ever experienced > > it, thanks. Hm, it should be the hvc one. Perhaps Stefano knows.. CC-ing him and xen-devel here. > > > > crash> p *console_drivers > > $10 = { > > name = "ttyS\000\000\000\000\000\000\000\000\000\000\000", > > write = 0xffffffff8138d5a0 <serial8250_console_write>, > > read = 0, > > device = 0xffffffff8138c350 <uart_console_device>, > > unblank = 0, > > setup = 0xffffffff81d29926 <serial8250_console_setup>, > > early_setup = 0xffffffff8138ca10 <serial8250_console_early_setup>, > > flags = 22, > > index = 0, > > cflag = 0, > > data = 0xffffffff81c82640, > > next = 0x0 > > } > > > > Thanks, > > Wei > > > -- > xen mailing list > xen(a)lists.fedoraproject.org <javascript:;> > https://admin.fedoraproject.org/mailman/listinfo/xen

On Mon, 20 Aug 2012, Konrad Rzeszutek Wilk wrote: > On Mon, Aug 20, 2012 at 09:39:56PM +0800, Wei Xu wrote: > > > Hi All, > > > I'm try to set up and verify Xen console driver base on Fedora 17 and Xen > > > 4.1.2 with hvm guest mode, > > > i searched around and got a link, it give steps both for PV and HVM mode, > > > I followed the HVM guide > > > and upgraded my kernel to 3.5.0. > > > > > > http://www.dedoimedo.com/computers/xen-console.html > > > > > > After that, I can got console output with "xm console <dom_id>", but the > > > console driver is not used when I tracing the driver > > .. I am not sure I understand: "when I tracing the driver" ? Are > you referring to the PV driver? > > > > with "crash" utility, by examing the "console_drivers", the console driver > > > is still "serial8250 console", so i wonder if I didn't > > > set up it properly or something else, is there someone ever experienced > > > it, thanks. > > Hm, it should be the hvc one. Perhaps Stefano knows.. > > CC-ing him and xen-devel here. An HVM guest has access to both an emulated serial (if a serial="pty" parameter is present in the VM config file) and a PV console. However the default first console is the emulated serial with libxl (see libxl__primary_console_find), that is what you get when you execute "xl console" without -t. But if you edit inittab to spawn a getty on hvc0 and then execute "xl console -t pv" you should get access to the PV console.

On Thu, 23 Aug 2012, Wei Xu wrote: > Thanks for your reply. > > I have tried the method but it looks still can't work, there is no "hvc0" device file in my "/dev" directory, > is that the root cause? Reading again the previous message, it is clear that you are still using xm/xend as toolstack to create VMs. Unfortunately xend doesn't support PV consoles for HVM guests, you need to use the new xl toolstack if you'd like to use that functionality. See: http://wiki.xen.org/wiki/XL