Merge tag 'kvmarm-fixes-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmar...

[platform/kernel/linux-starfive.git] / arch / arm64 / kvm / mmu.c

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index ba00bcc..9a636b8 100644 (file)
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1877,6 +1877,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
            !fault_supports_stage2_huge_mapping(memslot, hva, vma_pagesize)) {
                force_pte = true;
                vma_pagesize = PAGE_SIZE;
+               vma_shift = PAGE_SHIFT;
        }
 
        /*
@@ -1970,7 +1971,12 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
                (fault_status == FSC_PERM &&
                 stage2_is_exec(mmu, fault_ipa, vma_pagesize));
 
-       if (vma_pagesize == PUD_SIZE) {
+       /*
+        * If PUD_SIZE == PMD_SIZE, there is no real PUD level, and
+        * all we have is a 2-level page table. Trying to map a PUD in
+        * this case would be fatally wrong.
+        */
+       if (PUD_SIZE != PMD_SIZE && vma_pagesize == PUD_SIZE) {
                pud_t new_pud = kvm_pfn_pud(pfn, mem_type);
 
                new_pud = kvm_pud_mkhuge(new_pud);