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SubjectRe: Revert commit 5dcd14ecd4 - breaks EFI boot with SLES11 elilo.efi
On Thu, Feb 28, 2013 at 1:12 PM, H. Peter Anvin <> wrote:
> On 02/28/2013 01:09 PM, Robin Holt wrote:
>>> Sounds like ELILO needs to be fixed to pass the boot_params correctly.
>>> To support existing ELILO, it would be good to know exactly *which*
>>> fields ELILO pass in as garbage (because it does, that is why ->sentinel
>>> is nonzero) and use its bootloader ID to apply the proper brainwhack for
>>> the legacy versions.
>> Any idea how I can dump that information?
> Look at the source code and look at what fields it actually initializes.
> Give us that list, and then we can work around elilo braindamage in the
> kernel.
> Then make it follow the boot spec:
>> In 32-bit boot protocol, the first step in loading a Linux kernel
>> should be to setup the boot parameters (struct boot_params,
>> traditionally known as "zero page"). The memory for struct boot_params
>> should be allocated and initialized to all zero. Then the setup header
>> from offset 0x01f1 of kernel image on should be loaded into struct
>> boot_params and examined. The end of setup header can be calculated as
>> follow:
>> 0x0202 + byte value at offset 0x0201
> ... so we don't have to.

Good, kexec is not only one.

ELILO has one.

We need switch/case to have different fields set for it.



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