powerpc/kexec_file: Enable early kernel OPAL calls

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Kernels built with CONFIG_PPC_EARLY_DEBUG_OPAL enabled expects r8 & r9
to be filled with OPAL base & entry addresses respectively. Setting
these registers allows the kernel to perform OPAL calls before the
device tree is parsed.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/159602303975.575379.5032301944162937479.stgit@hbathini

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Hari Bathini 2020-07-29 17:14:06 +05:30 • committed by Michael Ellerman

parent b5667d13be

commit 2e6bd221d9

2 changed files with 36 additions and 0 deletions

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20

arch/powerpc/kexec/file_load_64.c

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16

arch/powerpc/purgatory/trampoline_64.S

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