search for: debugcon

This patch adds support for printing messages through a debug console. QEMU, for example, supports this through the debugcon facility. The benefit is that it's *much* faster than printing over a serial port. To print to I/O port 0x402 (the default used by SeaBIOS and OVMF), add "-DDEBUG_IO_PORT=0x402 -DCORE_DEBUG=1" to the build CFLAGS. To enable a debug console in QEMU that listens to I/O port 0x402 and...

On Sun, Feb 08, 2015 at 09:13:02AM -0700, Jonathan Boeing via Syslinux wrote: > This patch adds support for printing messages through a debug console. QEMU, > for example, supports this through the debugcon facility. The benefit is that > it's *much* faster than printing over a serial port. > > To print to I/O port 0x402 (the default used by SeaBIOS and OVMF), > add "-DDEBUG_IO_PORT=0x402 -DCORE_DEBUG=1" to the build CFLAGS. > > To enable a debug console in QEMU that...

...58 +0100 Geert Stappers via Syslinux <syslinux at zytor.com> wrote: > On Sun, Feb 08, 2015 at 09:13:02AM -0700, Jonathan Boeing via > Syslinux wrote: > > This patch adds support for printing messages through a debug > > console. QEMU, for example, supports this through the debugcon > > facility. The benefit is that it's *much* faster than printing > > over a serial port. > > > > To print to I/O port 0x402 (the default used by SeaBIOS and OVMF), > > add "-DDEBUG_IO_PORT=0x402 -DCORE_DEBUG=1" to the build CFLAGS. > > > &gt...

...;http://libvirt.org/schemas/domain/qemu/1.0' <-- this one > > > > - add the following XML fragment near the end of the domain XML, as a > direct child of the <domain> element: > > <qemu:arg value='-global'/> > <qemu:arg value='isa-debugcon.iobase=0x402'/> > <qemu:arg value='-debugcon'/> > <qemu:arg value='file:/tmp/guest_name.log'/> > > This will send the OVMF log to /tmp/guest_name.log. > > (6) If you are already missing a boot option to boot your installed OS, > you mi...

Apologies if this has been gone over, but I believe I have checked the intertubes more than a bit..... I am using libvirt and have vms booting under an OVMF.fd to use an efi firmware. I can create vms, linux ubuntu, and they will boot up. However, everytime I reboot am I dropped into the default efi shell provide by the tianocore build. Then I must walk the FS to the booting efi app and run, in

...='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0' <-- this one > - add the following XML fragment near the end of the domain XML, as a direct child of the <domain> element: <qemu:arg value='-global'/> <qemu:arg value='isa-debugcon.iobase=0x402'/> <qemu:arg value='-debugcon'/> <qemu:arg value='file:/tmp/guest_name.log'/> This will send the OVMF log to /tmp/guest_name.log. (6) If you are already missing a boot option to boot your installed OS, you might have to reestablish that boot...

...nt > > of RAM available -- like most other BIOSes out there already > > do - it would be extremely helpful to aid troubleshooting. > > SeaBIOS boots too fast for anything useful to be seen on the screen. > That said, one can add "-chardev stdio,id=seabios -device > isa-debugcon,iobase=0x402,chardev=seabios" to the qemu command line > to > see the SeaBIOS debugging output. That output has the memory info > and much more. I guess that's then something to propose for libvirt as RFE as an extra argument for <bios useserial='yes' /> we could i...

...dr=0x4 \ > -device > virtconsole,id=vc2,name=vc2,chardev=chardev_vc2,bus=virtio_serial_pci1.0,nr=1 > \ > -chardev > socket,id=seabioslog_id_20191223-061943-73qpR3NF,path=/var/tmp/avocado_6ae2tn_f/seabios-20191223-061943-73qpR3NF,server,nowait > \ > -device > isa-debugcon,chardev=seabioslog_id_20191223-061943-73qpR3NF,iobase=0x402 \ > -device qemu-xhci,id=usb1,bus=pci.0,addr=0x5 \ > -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x6 \ > -drive > id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/home/kv...

...serial port to char device 'dev' -parallel dev redirect the parallel port to char device 'dev' -monitor dev redirect the monitor to char device 'dev' -qmp dev like -monitor but opens in 'control' mode -mon chardev=[name][,mode=readline|control][,default] -debugcon dev redirect the debug console to char device 'dev' -pidfile file write PID to 'file' -singlestep always run in singlestep mode -S freeze CPU at startup (use 'c' to start execution) -gdb dev wait for gdb connection on 'dev' -s...

Hi guys, I am new to QEMU-KVM, libvmi and libvirt stuff. Libvmi uses libvirt. I am trying to to run process-list example of libvmi and getting error as below. It seems that this error may be due to libvirt as it is not able to find domain. I seek your kind help on below error: spanhal1@seclab2:~/KVMModule/libvmi-0.10.1$ sudo ./examples/process-list ubuntu libvir: QEMU error : Domain not found: