From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sat, 13 Nov 2021 21:14:05 +0000 (-0800)
Subject: Merge tag 'virtio-mem-for-5.16' of git://github.com/davidhildenbrand/linux
X-Git-Tag: howlett/maple/20220722_2~1816
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ccfff0a2bd2a30de130b5623d242ddecd0272bc2;p=users%2Fjedix%2Flinux-maple.git

Merge tag 'virtio-mem-for-5.16' of git://github.com/davidhildenbrand/linux

Pull virtio-mem update from David Hildenbrand:
 "Support the VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE feature in virtio-mem,
  now that "accidential" access to logically unplugged memory inside
  added Linux memory blocks is no longer possible, because we:

   - Removed /dev/kmem in commit bbcd53c96071 ("drivers/char: remove
     /dev/kmem for good")

   - Disallowed access to virtio-mem device memory via /dev/mem in
     commit 2128f4e21aa ("virtio-mem: disallow mapping virtio-mem memory
     via /dev/mem")

   - Sanitized access to virtio-mem device memory via /proc/kcore in
     commit 0daa322b8ff9 ("fs/proc/kcore: don't read offline sections,
     logically offline pages and hwpoisoned pages")

   - Sanitized access to virtio-mem device memory via /proc/vmcore in
     commit ce2814622e84 ("virtio-mem: kdump mode to sanitize
     /proc/vmcore access")

  The new VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE feature that will be
  required by some hypervisors implementing virtio-mem in the near
  future, so let's support it now that we safely can"

* tag 'virtio-mem-for-5.16' of git://github.com/davidhildenbrand/linux:
  virtio-mem: support VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE
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ccfff0a2bd2a30de130b5623d242ddecd0272bc2