d2fc9dfcd1
According to the OVMF whitepaper [1]: IMPORTANT: Never pass OVMF.fd to qemu with the -bios option. That option maps the firmware image as ROM into the guest's address space, and forces OVMF to emulate non-volatile variables with a fallback driver that is bound to have insufficient and confusing semantics. Use the pflash interface instead. Currently the unified firmware file is used, which contains both firmware code and variable sections. By enabling snapshot on the pflash device, the firmware can be loaded in such a way that variables can be written to without writing to the backing file. Since pflash does no searching for firmware paths that are not absolute, unlike the -bios option, also make firmware paths absolute. Additionally, update the previous firmware paths or file names that did not correspond to ones installed by Debian. Use the q35 machine, instead of the default i440fx, for i386-efi because the default machine type does not emulate a flash device, which is now needed to load the firmware. [1] http://www.linux-kvm.org/downloads/lersek/ovmf-whitepaper-c770f8c.txt Signed-off-by: Glenn Washburn <development@efficientek.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'