Fix an unguarded d->arch.hvm access in assign_device().
Signed-off-by: Jan Beulich <jbeul...@suse.com>
---
Split from now withdrawn "x86/HVM: p2m_ram_ro is incompatible with
device pass-through".
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -1488,7 +1488,8 @@ static int assign_device(struct domain *
/* Prevent device assign if mem paging or mem sharing have been
* enabled for this domain */
- if ( unlikely(d->arch.hvm.mem_sharing_enabled ||
+ if ( unlikely((is_hvm_domain(d) &&
+ d->arch.hvm.mem_sharing_enabled) ||
vm_event_check_ring(d->vm_event_paging) ||
p2m_get_hostp2m(d)->global_logdirty) )
return -EXDEV;
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