From: Suzuki K Poulose <suzuki.poulose@arm.com> mainline inclusion from mainline-v5.1-rc7 commit 2e8010bb71b39ff18aac9fb209b3c3093f4c4783 category: bugfix ------------------------------------------------- With commit a80868f398554842b14, we no longer ensure that the THP page is properly aligned in the guest IPA. Skip the stage2 huge mapping for unaligned IPA backed by transparent hugepages. Fixes: a80868f398554842b14 ("KVM: arm/arm64: Enforce PTE mappings at stage2 when needed") Reported-by: Eric Auger <eric.auger@redhat.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Chirstoffer Dall <christoffer.dall@arm.com> Cc: Zenghui Yu <yuzenghui@huawei.com> Cc: Zheng Xiang <zhengxiang9@huawei.com> Cc: Andrew Murray <andrew.murray@arm.com> Cc: Eric Auger <eric.auger@redhat.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Zenghui Yu <yuzenghui@huawei.com> Reviewed-by: Hailiang Zhang <zhang.zhanghailiang@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- virt/kvm/arm/mmu.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index 27ef0c4..f74d1a7 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -1794,8 +1794,12 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa, * Only PMD_SIZE transparent hugepages(THP) are * currently supported. This code will need to be * updated to support other THP sizes. + * + * Make sure the host VA and the guest IPA are sufficiently + * aligned and that the block is contained within the memslot. */ - if (transparent_hugepage_adjust(&pfn, &fault_ipa)) + if (fault_supports_stage2_huge_mapping(memslot, hva, PMD_SIZE) && + transparent_hugepage_adjust(&pfn, &fault_ipa)) vma_pagesize = PMD_SIZE; } -- 1.8.3