KVM: arm64: Implement __pkvm_host_share_hyp() using do_share()

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__pkvm_host_share_hyp() shares memory between the host and the
hypervisor so implement it as an invocation of the new do_share()
mechanism.

Note that double-sharing is no longer permitted (as this allows us to
reduce the number of page-table walks significantly), but is thankfully
no longer relied upon by the host.

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/20211215161232.1480836-12-qperret@google.com

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Will Deacon 2021-12-15 16:12:28 +00:00 • committed by Marc Zyngier

parent e82edcc75c

commit 1ee32109fd

1 changed files with 33 additions and 88 deletions

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

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