diff options
| author | Marc Zyngier <maz@kernel.org> | 2021-11-29 20:00:45 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-12-16 17:01:05 +0000 |
| commit | 9d8604b28575ccab3afd8d6f56cab9a6c0d281ef (patch) | |
| tree | d4af915ba4f5d62d37ab6d53b55344630852900f /arch/arm64/kvm/hyp | |
| parent | 142ff9bddbde757674c7081ffc238cfcffa1859b (diff) | |
KVM: arm64: Rework kvm_pgtable initialisation
Ganapatrao reported that the kvm_pgtable->mmu pointer is more or
less hardcoded to the main S2 mmu structure, while the nested
code needs it to point to other instances (as we have one instance
per nested context).
Rework the initialisation of the kvm_pgtable structure so that
this assumtion doesn't hold true anymore. This requires some
minor changes to the order in which things are initialised
(the mmu->arch pointer being the critical one).
Reported-by: Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>
Reviewed-by: Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211129200150.351436-5-maz@kernel.org
Diffstat (limited to 'arch/arm64/kvm/hyp')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/mem_protect.c | 4 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/pgtable.c | 6 |
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c index c1a90dd022b8..7d7b7037dc68 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -103,19 +103,19 @@ int kvm_host_prepare_stage2(void *pgt_pool_base) prepare_host_vtcr(); hyp_spin_lock_init(&host_kvm.lock); + mmu->arch = &host_kvm.arch; ret = prepare_s2_pool(pgt_pool_base); if (ret) return ret; - ret = __kvm_pgtable_stage2_init(&host_kvm.pgt, &host_kvm.arch, + ret = __kvm_pgtable_stage2_init(&host_kvm.pgt, mmu, &host_kvm.mm_ops, KVM_HOST_S2_FLAGS, host_stage2_force_pte_cb); if (ret) return ret; mmu->pgd_phys = __hyp_pa(host_kvm.pgt.pgd); - mmu->arch = &host_kvm.arch; mmu->pgt = &host_kvm.pgt; WRITE_ONCE(mmu->vmid.vmid_gen, 0); WRITE_ONCE(mmu->vmid.vmid, 0); diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index f8ceebe4982e..8cdbc43fa651 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -1116,13 +1116,13 @@ int kvm_pgtable_stage2_flush(struct kvm_pgtable *pgt, u64 addr, u64 size) } -int __kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm_arch *arch, +int __kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm_s2_mmu *mmu, struct kvm_pgtable_mm_ops *mm_ops, enum kvm_pgtable_stage2_flags flags, kvm_pgtable_force_pte_cb_t force_pte_cb) { size_t pgd_sz; - u64 vtcr = arch->vtcr; + u64 vtcr = mmu->arch->vtcr; u32 ia_bits = VTCR_EL2_IPA(vtcr); u32 sl0 = FIELD_GET(VTCR_EL2_SL0_MASK, vtcr); u32 start_level = VTCR_EL2_TGRAN_SL0_BASE - sl0; @@ -1135,7 +1135,7 @@ int __kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm_arch *arch, pgt->ia_bits = ia_bits; pgt->start_level = start_level; pgt->mm_ops = mm_ops; - pgt->mmu = &arch->mmu; + pgt->mmu = mmu; pgt->flags = flags; pgt->force_pte_cb = force_pte_cb; |