Commit cc835f78 authored by Christian Borntraeger's avatar Christian Borntraeger Committed by Martin Schwidefsky

[S390] kvm_s390: Fix oops in virtio device detection with "mem="

The current virtio model on s390 has the descriptor page above the main
memory. The guest virtio detection will oops if the mem= parameter is
used to reduce/change the memory size.
We have to use real_memory_size instead of max_pfn to detect the virtio
descriptor pages.
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 675be97a
......@@ -322,13 +322,13 @@ static int __init kvm_devices_init(void)
return rc;
}
rc = vmem_add_mapping(PFN_PHYS(max_pfn), PAGE_SIZE);
rc = vmem_add_mapping(real_memory_size, PAGE_SIZE);
if (rc) {
s390_root_dev_unregister(kvm_root);
return rc;
}
kvm_devices = (void *) PFN_PHYS(max_pfn);
kvm_devices = (void *) real_memory_size;
ctl_set_bit(0, 9);
register_external_interrupt(0x2603, kvm_extint_handler);
......
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