Although the idmap section of KVM can only be at most 4kB and must be aligned on a 4kB boundary, the rest of the code expects it to be page aligned. Things get messy when tearing down the HYP page tables when PAGE_SIZE is 64K, and the idmap section isn't 64K aligned. Let's fix this by computing aligned boundaries that the HYP code will use. Reported-by: James Morse <james.morse@xxxxxxx> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> --- virt/kvm/arm/mmu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index 0e5cfffb4c21..a9e0513868e9 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -1815,7 +1815,9 @@ int kvm_mmu_init(void) int err; hyp_idmap_start = kvm_virt_to_phys(__hyp_idmap_text_start); + hyp_idmap_start = ALIGN_DOWN(hyp_idmap_start, PAGE_SIZE); hyp_idmap_end = kvm_virt_to_phys(__hyp_idmap_text_end); + hyp_idmap_end = ALIGN(hyp_idmap_end, PAGE_SIZE); hyp_idmap_vector = kvm_virt_to_phys(__kvm_hyp_init); /* -- 2.14.2
