KVM: arm64: Add FF-A helpers to share/unshare memory with secure world

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Extend pKVM's memory protection code so that we can update the host's
stage-2 page-table to track pages shared with secure world by the host
using FF-A and prevent those pages from being mapped into a guest.

Co-developed-by: Andrew Walbran <qwandor@google.com>
Signed-off-by: Andrew Walbran <qwandor@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20230523101828.7328-6-will@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Will Deacon 2023-05-23 11:18:22 +01:00 • committed by Oliver Upton

parent 9d0c6a9af9

commit f9112eade7

2 changed files with 71 additions and 0 deletions

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arch/arm64/kvm/hyp/include/nvhe/mem_protect.h

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68

arch/arm64/kvm/hyp/nvhe/mem_protect.c

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