3e9dc03d3a9e9b708878b2894463463c54e520f5 - linux

commit: 3e9dc03d3a9e9b708878b2894463463c54e520f5
[log] [tgz]
author: Will Deacon <will@kernel.org>
Mon Oct 18 18:44:49 2021 +0100
committer: Will Deacon <will@kernel.org>
Wed Dec 01 15:50:40 2021 +0000
tree: 0c3feb2233c409a5aabefb673e1168d6cab60752
parent: 39829fdf106c1b270e820000f613fdd854774bca [diff]

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>

arch/arm64/include/asm/kvm_asm.h[diff]
arch/arm64/kvm/hyp/include/nvhe/mem_protect.h[diff]
arch/arm64/kvm/hyp/nvhe/hyp-main.c[diff]
arch/arm64/kvm/hyp/nvhe/mem_protect.c[diff]

4 files changed

tree: 0c3feb2233c409a5aabefb673e1168d6cab60752