tree 6c3e6fc017fe1bcb5a10d3ff0fda30937442dfb5
parent b3a397b45e7bb9033d78bb443ab4dc0143c2e9a2
author Will Deacon <will@kernel.org> 1634579089 +0100
committer Quentin Perret <qperret@google.com> 1634642703 +0100

KVM: arm64: Expose unshare hypercall to the host

Introduce an unshare hypercall which can be used to unmap memory from
the hypervisor stage-1 in nVHE protected mode. This will be useful to
update the EL2 ownership state of pages during guest teardown, and
avoids keeping dangling mappings to unreferenced portions of memory.

Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>