"H. Peter Anvin" <hpa@xxxxxxxxx> writes: > yhlu wrote: >> so the kexec tools need to scan the pci devices list, and find out how >> to set real_mode.isVGA and orig_video_mode, also need to parse the >> comand line about vga console. > > BTW, welcome to the hell of bypassing setup. Well in this case things are so very much better then attempting to us setup.S it isn't a real option. In general BIOS calls just don't work reliably after linux has been running for a while. As for YH's point it does look like there are a few ways to poke the linux kernel to see what is happening. We can look in /proc/ioports and see what has reserved the video resources. That should give us a reasonable estimate of the video adapter. We can do an ioctl to the console and see how many lines and columns we have. Reusing boot_params could be nice but if we have the information available in other ways digging it out that way is quite possibly better. Eric _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
