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vhost: Add vhost_commit callback for SeaBIOS ROM region re-mapping

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This patch follows MST's recommendation to move checks for
vhost_verify_ring_mappings() -> cpu_physical_memory_map() operations
from MemoryListener->region_[add,del]() -> vhost_set_memory() into
final MemoryListener->commit() -> vhost_commit() callback.

It addresses the case where virtio-scsi vq ioport RAM re-mapping
to read-only SeaBIOS ROM triggers a cpu_physical_memory_map()
NIL MemoryRegionSection pointer failure.

Also save vhost_dev->mem_changed_[start,end]_addr values in
vhost_set_memory() for final ranges_overlap checks.  (Thanks Paolo!)

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Nicholas Bellinger 2013-04-03 09:15:11 +00:00 • committed by Paolo Bonzini
parent 881d588a98
commit af60314291
2 changed files with 41 additions and 15 deletions
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3
include/hw/virtio/vhost.h
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@ -45,6 +45,9 @@ struct vhost_dev {
vhost_log_chunk_t *log;
unsigned long long log_size;
bool force;
bool memory_changed;
hwaddr mem_changed_start_addr;
hwaddr mem_changed_end_addr;
};
int vhost_dev_init(struct vhost_dev *hdev, int devfd, const char *devpath,