diff options
| author | Oliver Upton <oliver.upton@linux.dev> | 2022-11-07 21:56:36 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-11-10 14:43:46 +0000 |
| commit | 6b91b8f95cadd3441c056182daf9024475ac4a91 (patch) | |
| tree | 47c413fa22c1b28e5c4143494ad5895a7aff487d /arch/arm64/kvm/mmu.c | |
| parent | 8e94e1252cc054bb31fd3e9a15235cd831970ec1 (diff) | |
KVM: arm64: Use an opaque type for pteps
Use an opaque type for pteps and require visitors explicitly dereference
the pointer before using. Protecting page table memory with RCU requires
that KVM dereferences RCU-annotated pointers before using. However, RCU
is not available for use in the nVHE hypervisor and the opaque type can
be conditionally annotated with RCU for the stage-2 MMU.
Call the type a 'pteref' to avoid a naming collision with raw pteps. No
functional change intended.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221107215644.1895162-7-oliver.upton@linux.dev
Diffstat (limited to 'arch/arm64/kvm/mmu.c')
| -rw-r--r-- | arch/arm64/kvm/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 60ee3d9f01f8..5e197ae190ef 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -640,7 +640,7 @@ static struct kvm_pgtable_mm_ops kvm_user_mm_ops = { static int get_user_mapping_size(struct kvm *kvm, u64 addr) { struct kvm_pgtable pgt = { - .pgd = (kvm_pte_t *)kvm->mm->pgd, + .pgd = (kvm_pteref_t)kvm->mm->pgd, .ia_bits = VA_BITS, .start_level = (KVM_PGTABLE_MAX_LEVELS - CONFIG_PGTABLE_LEVELS), |