On Thu, Sep 15, 2011 at 11:53 AM, Sasha Levin <levinsasha928@xxxxxxxxx> wrote: > This patch adds the '-tty' option to 'kvm run' which allows the user to > remap a guest TTY into a PTS on the host. > > Usage: > 'kvm run --tty [id] [other options]' > > The tty will be mapped to a pts and will be printed on the screen: > ' Info: Assigned terminal 1 to pty /dev/pts/X' > > At this point, it is possible to communicate with the guest using that pty. > > This is useful for debugging guest kernel using KGDB: > > 1. Run the guest: > 'kvm run -k [vmlinuz] -p "kdbgoc=ttyS1 kdbgwait" --tty 1' > > And see which PTY got assigned to ttyS1. > > 2. Run GDB on the host: > 'gdb [vmlinuz]' > > 3. Connect to the guest (from within GDB): > 'target remote /dev/pty/X' > > 4. Start debugging! (enter 'continue' to continue boot). > > Cc: David Evensky <evensky@xxxxxxxxxxxxxxxxxxxx> > Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx> Neat! Would a tools/kvm/Documentation/debugging.txt be helpful for people who want to do kernel debugging with kvmtool? -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
