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KVM: arm64: nVHE: Switch to hyp context for EL2

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Save and restore the host context when switching to and from hyp. This
gives hyp its own context that the host will not see as a step towards a
full trust boundary between the two.

SP_EL0 and pointer authentication keys are currently shared between the
host and hyp so don't need to be switched yet.

Signed-off-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200915104643.2543892-13-ascull@google.com
This commit is contained in:
Andrew Scull 2020-09-15 11:46:36 +01:00 • committed by Marc Zyngier
commit 4e3393a969
4 changed files with 89 additions and 19 deletions
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