Re: [PATCH 6/6] KVM: arm64: pkvm: Make kvm_host_owns_hyp_mappings() robust to VHE
From: Will Deacon <will@kernel.org>
Date: 2021-12-08 17:51:01
Also in:
kvmarm, lkml
On Wed, Dec 08, 2021 at 03:22:59PM +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,
Typo: non => none
quoted hunk ↗ jump to hunk
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 <redacted> --- 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 605c104eb030..ea840fa223b5 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;
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