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KVM: s390: Fix guest migration for huge guests resulting in panic
While we can technically not run huge page guests right now, we can setup a guest with huge pages. Trying to migrate it will trigger a VM_BUG_ON and, if the kernel is not configured to panic on a BUG, it will happily try to work on non-existing page table entries. With this patch, we always return "dirty" if we encounter a large page when migrating. This at least fixes the immediate problem until we have proper handling for both kind of pages. Fixes: 15f36eb ("KVM: s390: Add proper dirty bitmap support to S390 kvm.") Cc: <[email protected]> # 3.16+ Signed-off-by: Janosch Frank <[email protected]> Acked-by: Christian Borntraeger <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
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