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KVM: arm64: pkvm: Make kvm_host_owns_hyp_mappings() robust to VHE

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The kvm_host_owns_hyp_mappings() function should return true if and only
if the host kernel is responsible for creating the hypervisor stage-1
mappings. That is only possible in standard non-VHE mode, or during boot
in protected nVHE mode. But either way, none of this makes sense in VHE,
so make sure to catch this case as well, hence making the function
return sensible values in any context (VHE or not).

Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211208152300.2478542-7-qperret@google.com
This commit is contained in:
Quentin Perret 2021-12-08 15:22:59 +00:00 committed by Marc Zyngier
parent bff01cb6b1
commit 64a1fbda59
1 changed files with 3 additions and 0 deletions
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arch/arm64/kvm/mmu.c
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@ -239,6 +239,9 @@ void free_hyp_pgds(void)
static bool kvm_host_owns_hyp_mappings(void)
{
if (is_kernel_in_hyp_mode())
return false;
if (static_branch_likely(&kvm_protected_mode_initialized))
return false;