Re: [PATCH v7 1/3] efi/x86: Fix EFI memory map corruption with kexec

From: Borislav Petkov
Date: Tue Jun 04 2024 - 14:03:01 EST


On Tue, Jun 04, 2024 at 07:09:56PM +0800, Dave Young wrote:
> Anyway there is not such a helper for all cases.

But maybe there should be...

This is not the first case where the need arises to be able to say:

if (am I a kexeced kernel)

in code.

Perhaps we should have a global var kexeced or so which gets incremented
on each kexec-ed kernel, somewhere in very early boot of the kexec-ed
kernel we do

kexeced++;

and then other code can query it and know whether this is a kexec-ed
kernel and how many times it got kexec-ed...

--
Regards/Gruss,
Boris.

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