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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> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211215161232.1480836-14-qperret@google.com |
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uapi/asm |