[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] getting debug output out of hvmloader and qemu-dm
hvmloader's outb to port 0xe9 is intercepted by Xen, and Xen will prink the messages: hvm_domain_initialise() -> register_portio_handler(d, 0xe9, 1, hvm_print_line); You can use a debug build Xen, or specify the "guest_loglvl=all" parameter in grub.conf for Xen to see the messages printked by hvm_print_line(). -- Dexuan -----Original Message----- From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of James Harper Sent: 2008年7月3日 10:48 To: Kamala Narasimhan; xen-devel@xxxxxxxxxxxxxxxxxxx Subject: RE: [Xen-devel] getting debug output out of hvmloader and qemu-dm > If it is the *DEBUG* preprocessor flag in vgabios that you enabled, did > you check xen message buffer (xm dmesg) or serial output? 'xm dmesg' doesn't show me anything... how might I look at the serial output? Looking at vgabios.c, the 'printf' function that is used for debugging appears to write to port 0xe9, but I can't see that anything actually reads that. James _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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