From 46fef158f10d255dfe47cf3a0ab5f0965b66b1da Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 12 Mar 2018 14:25:10 +0000 Subject: KVM: arm/arm64: Fix idmap size and alignment 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. Acked-by: Catalin Marinas Reported-by: James Morse Reviewed-by: James Morse Signed-off-by: Marc Zyngier --- virt/kvm/arm/mmu.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'virt') diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index 52b0ee31ebee0..c41d03a8af930 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); /* -- cgit v1.2.3