Red Hat Bugzilla – Bug 451737
Bootloader/Anaconda Portion of UEFI Support
Last modified: 2016-04-18 05:47:09 EDT
Description of problem:
This feature request is to track the bootloader portion of UEFI support.
From bug 253295 (kernel portion)
Short Description: Request full support for UEFI for i386 and x86_64 archs.
Requires UEFI extensions to lilo/grub boot loaders. Also expect support EFI
Variables in NVRAM exported to the OS, EFI runtime services. It appears most
of the development for i386 is complete, but needs to be verified. x86_64
support is being developed by Intel and needs to be submitted upstream. ia64
has supported EFI from the beginning.
Architecture: x86 x86_64
* Bug 253295: UEFI support (kernel)
* Bug 451737: Bootloader Portion of UEFI Support
* Bug 451734: Grub Portion of UEFI Support
UEFI support is in Fedora, but it has received virtually no testing. Until we have worked the bugs out upstream, there is no way we can risk RHEL stability for this feature.
Development Management has reviewed and declined this request. You may appeal
this decision by reopening this request.
Per Denise, we want to stabilize uEFI support in Fedora and RHEL6 first and then consider back porting it to RHEL5. The earliest this would be is RHEL5.5 assuming everything is stable in the RHEL6 beta by then. This is a major multi-partner requirement and can not be a RHEL6 only implementation.
Reopening this feature request.
On Fri, 2009-08-14 at 15:40 -0400, Denise Dumas wrote:
> Guys, we are not going to be able to do this in rhel5. Even [the
> suggested] backup [of] "just port grub" doesn't work.
> The different hard disk formats and boot configuration for the two
> firmware types mean that the OS must boot from the firmware that was
> used for the installation. RHEL6 with UEFI support cannot boot from
> BIOS firmware and vice versa. (Windows also has this limitation).
Partners need to continue to provide BIOS boot capability in RHEL5.
RHEL6 will support uEFI.