[PATCH 5/5] kexec: X86: Pass memory ranges via e820 table instead of memmap= boot parameter

[H. Peter Anvin]

On 04/15/2013 12:48 PM, Thomas Renninger wrote:
> On Monday, April 15, 2013 05:20:24 AM H. Peter Anvin wrote:
>> Except that is wrong. The kernel can receive more than 128 e820 entries,
>> they just have to be passed via a different mechanism.
> 
> Would it make sense to pass the tables via efi_map by moving up
> efi_map parsing to the beginning of efi init in arch/x86/platform/efi/efi.c?
> 
> And in kexec pass the efi signature, efi map pointers, add add_efi_memmap
> param (and possibly some more?)?
> Then there would be no limit at all anymore.
> 

There is no limit... that's what I'm telling you.

kexec should certainly pass the EFI information, otherwise the second
kernel can't invoke EFI runtime calls at all.  Therein lies a whole bit
of pain.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.