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KVM: arm64: Move __hyp_set_vectors out of .hyp.text

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The .hyp.text section is supposed to be reserved for the nVHE EL2 code.
However, there is currently one occurrence of EL1 executing code located
in .hyp.text when calling __hyp_{re}set_vectors(), which happen to sit
next to the EL2 stub vectors. While not a problem yet, such patterns
will cause issues when removing the host kernel from the TCB, so a
cleaner split would be preferable.

Fix this by delimiting the end of the .hyp.text section in hyp-stub.S.

Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20210128173850.2478161-1-qperret@google.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Quentin Perret 2021-01-28 17:38:50 +00:00 committed by Will Deacon
parent c7b9095e87
commit e30be1455b
1 changed files with 2 additions and 0 deletions
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arch/arm64/kernel/hyp-stub.S
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@ -85,6 +85,8 @@ SYM_CODE_END(\label)
invalid_vector el1_fiq_invalid
invalid_vector el1_error_invalid
.popsection
/*
* __hyp_set_vectors: Call this after boot to set the initial hypervisor
* vectors as part of hypervisor installation. On an SMP system, this should