Messages in this thread Patch in this message | | | Date | Thu, 9 Dec 2021 10:10:54 +0000 | From | Will Deacon <> | Subject | Re: [PATCH v3 01/15] KVM: arm64: Check if running in VHE from kvm_host_owns_hyp_mappings() |
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On Wed, Dec 01, 2021 at 05:03:55PM +0000, Quentin Perret wrote: > 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, non 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> > --- > arch/arm64/kvm/mmu.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c > index 326cdfec74a1..f8f1096a297f 100644 > --- a/arch/arm64/kvm/mmu.c > +++ b/arch/arm64/kvm/mmu.c > @@ -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;
This looks identical to:
https://lore.kernel.org/r/20211208152300.2478542-7-qperret@google.com
Will
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