David Hildenbrand 361469d853 virtio-mem: support CONFIG_PROC_VMCORE_DEVICE_RAM
Let's implement the get_device_ram() vmcore callback, so architectures
that select NEED_PROC_VMCORE_NEED_DEVICE_RAM, like s390 soon, can include
that memory in a crash dump.

Merge ranges, and process ranges that might contain a mixture of plugged
and unplugged, to reduce the total number of ranges.

Link: https://lkml.kernel.org/r/20241204125444.1734652-12-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Eric Farman <farman@linux.ibm.com>
Cc: Eugenio Pérez <eperezma@redhat.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-12-18 19:50:45 -08:00
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