Hi Kevin, When I use old seabios in some stable linux release, some bootable devices (2 ide disks) would be lost when I try to restart guest by Ctrl+Alt+Delete during boot stage.
Releated Red Hat BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1129549 I found an upstream commit [1] fixed this bug, but when I backport this patch to old seabios, guest will shutdown when I try to restart by Ctrl+Alt+Delete during boot stage. Kevin, can you help to describe that: "Unfortunately, kvm does not keep a pristine copy of the BIOS at 0xffff0000" It's a kvm (userspace, QEMU) bug? If it's a qemu-kvm bug, I should also fix this bz in old stable release. [1] =========================================== commit 244caf86f11f5f65d166d91704f64cb673167abc Author: Kevin O'Connor <ke...@koconnor.net> Date: Wed Sep 15 21:48:16 2010 -0400 Try to hard-reboot on rerun of post even on emulators. Extend the hard-reboot logic to qemu and kvm. On qemu, a reboot will not reset the memory settings for 0xc0000-0xfffff, so copy that memory area manually before rebooting. Unfortunately, kvm does not keep a pristine copy of the BIOS at 0xffff0000, so detect that case and shutdown the machine. Two backport dependences: [PATCH] Try to hard-reboot processor on rerun of post under coreboot. [PATCH] Don't do shadow copying of optionroms when CONFIG_OPTIONROMS_DEPLOYED. -- Amos.
