tree 5c165b3862b3addf1571ce3bf5dffa3c0be03e53
parent c5edde98996581443f7f5735b545f65ec050e4ec
author James Morse <james.morse@arm.com> 1548347577 +0000
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1549470808 +0100

arm64: hibernate: Clean the __hyp_text to PoC after resume

commit f7daa9c8fd191724b9ab9580a7be55cd1a67d799 upstream.

During resume hibernate restores all physical memory. Any memory
that is accessed with the MMU disabled needs to be cleaned to the
PoC.

KVMs __hyp_text was previously ommitted as it runs with the MMU
enabled, but now that the hyp-stub is located in this section,
we must clean __hyp_text too.

This ensures secondary CPUs that come online after hibernate
has finished resuming, and load KVM via the freshly written
hyp-stub see the correct instructions.

Signed-off-by: James Morse <james.morse@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>