powerpc/kexec_file: fix extra size calculation for kexec FDT

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While setting up the FDT for kexec, CPU nodes that are added after the
system boots and reserved memory ranges are incorporated into the
initial_boot_params (base FDT).

However, they are not taken into account when determining the additional
size needed for the kexec FDT. As a result, kexec fails to load,
generating the following error:

[1116.774451] Error updating memory reserve map: FDT_ERR_NOSPACE
kexec_file_load failed: No such process

Therefore, consider the extra size for CPU nodes added post-system boot
and reserved memory ranges while preparing the kexec FDT.

While adding a new parameter to the setup_new_fdt_ppc64 function, it was
noticed that there were a couple of unused parameters, so they were
removed.

Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240510102235.2269496-2-sourabhjain@linux.ibm.com

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This commit is contained in:

Sourabh Jain 2024-05-10 15:52:34 +05:30 • committed by Michael Ellerman

parent 0300a92e96

commit 0d3ff06733

3 changed files with 33 additions and 38 deletions

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6

arch/powerpc/include/asm/kexec.h

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12

arch/powerpc/kexec/elf_64.c

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53

arch/powerpc/kexec/file_load_64.c

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