Re: [PATCH v4 34/34] KVM: arm64: Protect the .hyp sections from the host
flat view
From: Will Deacon <will@kernel.org>
Date: 2021-03-11 19:18:14
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kvmarm, lkml
On Wed, Mar 10, 2021 at 05:57:51PM +0000, Quentin Perret wrote:
When KVM runs in nVHE protected mode, use the host stage 2 to unmap the hypervisor sections by marking them as owned by the hypervisor itself. The long-term goal is to ensure the EL2 code can remain robust regardless of the host's state, so this starts by making sure the host cannot e.g. write to the .hyp sections directly. Signed-off-by: Quentin Perret <redacted> --- arch/arm64/include/asm/kvm_asm.h | 1 + arch/arm64/kvm/arm.c | 46 +++++++++++++++++++ arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 2 + arch/arm64/kvm/hyp/nvhe/hyp-main.c | 9 ++++ arch/arm64/kvm/hyp/nvhe/mem_protect.c | 33 +++++++++++++ 5 files changed, 91 insertions(+)
Acked-by: Will Deacon <will@kernel.org> Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel