arm64: kexec: move relocation function setup

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Currently, kernel relocation function is configured in machine_kexec()
at the time of kexec reboot by using control_code_page.

This operation, however, is more logical to be done during kexec_load,
and thus remove from reboot time. Move, setup of this function to
newly added machine_kexec_post_load().

Because once MMU is enabled, kexec control page will contain more than
relocation kernel, but also vector table, add pointer to the actual
function within this page arch.kern_reloc. Currently, it equals to the
beginning of page, we will add offsets later, when vector table is
added.

Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20210125191923.1060122-10-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>

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This commit is contained in:

Pavel Tatashin 2021-01-25 14:19:14 -05:00 • committed by Will Deacon

parent 7018d467ff

commit 4c3c31230c

2 changed files with 20 additions and 27 deletions

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arch/arm64/include/asm/kexec.h

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46

arch/arm64/kernel/machine_kexec.c

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