arm64: mte: Save tags when hibernating

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When hibernating the contents of all pages in the system are written to
disk, however the MTE tags are not visible to the generic hibernation
code. So just before the hibernation image is created copy the tags out
of the physical tag storage into standard memory so they will be
included in the hibernation image. After hibernation apply the tags back
into the physical tag storage.

Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>

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Steven Price 2020-05-13 16:37:51 +01:00 • committed by Catalin Marinas

parent 36943aba91

commit ee11f332af

1 changed files with 118 additions and 0 deletions

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arch/arm64/kernel/hibernate.c

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