diff options
Diffstat (limited to 'arch/powerpc/kvm/e500_mmu_host.c')
| -rw-r--r-- | arch/powerpc/kvm/e500_mmu_host.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c index a1f5b0d4b1d6..4d33e199edcc 100644 --- a/arch/powerpc/kvm/e500_mmu_host.c +++ b/arch/powerpc/kvm/e500_mmu_host.c @@ -338,6 +338,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, pte_t *ptep; unsigned int wimg = 0; pgd_t *pgdir; + unsigned long flags; /* used to check for invalidations in progress */ mmu_seq = kvm->mmu_notifier_seq; @@ -468,14 +469,23 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, pgdir = vcpu_e500->vcpu.arch.pgdir; + /* + * We are just looking at the wimg bits, so we don't + * care much about the trans splitting bit. + * We are holding kvm->mmu_lock so a notifier invalidate + * can't run hence pfn won't change. + */ + local_irq_save(flags); ptep = find_linux_pte_or_hugepte(pgdir, hva, NULL); if (ptep) { pte_t pte = READ_ONCE(*ptep); - if (pte_present(pte)) + if (pte_present(pte)) { wimg = (pte_val(pte) >> PTE_WIMGE_SHIFT) & MAS2_WIMGE_MASK; - else { + local_irq_restore(flags); + } else { + local_irq_restore(flags); pr_err_ratelimited("%s: pte not present: gfn %lx,pfn %lx\n", __func__, (long)gfn, pfn); ret = -EINVAL; |