diff options
Diffstat (limited to 'arch/arm64/kvm/mmu.c')
| -rw-r--r-- | arch/arm64/kvm/mmu.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index e8a5179965d5..c5c26a9cb85b 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -114,9 +114,10 @@ static bool kvm_is_device_pfn(unsigned long pfn) */ /** * unmap_stage2_range -- Clear stage2 page table entries to unmap a range - * @kvm: The VM pointer + * @mmu: The KVM stage-2 MMU pointer * @start: The intermediate physical base address of the range to unmap * @size: The size of the area to unmap + * @may_block: Whether or not we are permitted to block * * Clear a range of stage-2 mappings, lowering the various ref-counts. Must * be called while holding mmu_lock (unless for freeing the stage2 pgd before @@ -493,6 +494,7 @@ void kvm_free_stage2_pgd(struct kvm_s2_mmu *mmu) * @guest_ipa: The IPA at which to insert the mapping * @pa: The physical address of the device * @size: The size of the mapping + * @writable: Whether or not to create a writable mapping */ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, phys_addr_t pa, unsigned long size, bool writable) @@ -530,7 +532,7 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, /** * stage2_wp_range() - write protect stage2 memory region range - * @kvm: The KVM pointer + * @mmu: The KVM stage-2 MMU pointer * @addr: Start address of range * @end: End address of range */ @@ -779,17 +781,25 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa, else vma_shift = PAGE_SHIFT; - vma_pagesize = 1ULL << vma_shift; if (logging_active || - (vma->vm_flags & VM_PFNMAP) || - !fault_supports_stage2_huge_mapping(memslot, hva, vma_pagesize)) { + (vma->vm_flags & VM_PFNMAP)) { force_pte = true; - vma_pagesize = PAGE_SIZE; vma_shift = PAGE_SHIFT; } + if (vma_shift == PUD_SHIFT && + !fault_supports_stage2_huge_mapping(memslot, hva, PUD_SIZE)) + vma_shift = PMD_SHIFT; + + if (vma_shift == PMD_SHIFT && + !fault_supports_stage2_huge_mapping(memslot, hva, PMD_SIZE)) { + force_pte = true; + vma_shift = PAGE_SHIFT; + } + + vma_pagesize = 1UL << vma_shift; if (vma_pagesize == PMD_SIZE || vma_pagesize == PUD_SIZE) - fault_ipa &= huge_page_mask(hstate_vma(vma)); + fault_ipa &= ~(vma_pagesize - 1); gfn = fault_ipa >> PAGE_SHIFT; mmap_read_unlock(current->mm); @@ -1336,7 +1346,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, spin_lock(&kvm->mmu_lock); if (ret) unmap_stage2_range(&kvm->arch.mmu, mem->guest_phys_addr, mem->memory_size); - else + else if (!cpus_have_final_cap(ARM64_HAS_STAGE2_FWB)) stage2_flush_memslot(kvm, memslot); spin_unlock(&kvm->mmu_lock); out: |