diff options
Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index d05a59c1eea7..b322ff15751d 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -977,18 +977,10 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, enum kvm_mr_change change) { - /* A few sanity checks. We can have exactly one memory slot which has - to start at guest virtual zero and which has to be located at a - page boundary in userland and which has to end at a page boundary. - The memory in userland is ok to be fragmented into various different - vmas. It is okay to mmap() and munmap() stuff in this slot after - doing this call at any time */ - - if (mem->slot) - return -EINVAL; - - if (mem->guest_phys_addr) - return -EINVAL; + /* A few sanity checks. We can have memory slots which have to be + located/ended at a segment boundary (1MB). The memory in userland is + ok to be fragmented into various different vmas. It is okay to mmap() + and munmap() stuff in this slot after doing this call at any time */ if (mem->userspace_addr & 0xffffful) return -EINVAL; |