Re: [RESEND PATCH v5 08/11] ppc64/kexec_file: setup backup region for kdump kernel

From: Thiago Jung Bauermann
Date: Mon Jul 27 2020 - 22:37:30 EST

Hari Bathini <hbathini@xxxxxxxxxxxxx> writes:

> Though kdump kernel boots from loaded address, the first 64KB of it is
> copied down to real 0. So, setup a backup region and let purgatory
> copy the first 64KB of crashed kernel into this backup region before
> booting into kdump kernel. Update reserve map with backup region and
> crashed kernel's memory to avoid kdump kernel from accidentially using
> that memory.
> Signed-off-by: Hari Bathini <hbathini@xxxxxxxxxxxxx>

Reviewed-by: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx>

Thiago Jung Bauermann
IBM Linux Technology Center