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: baikal/aarch64/sdk6.1~5284
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=f52401640983e5c6d80447d1aa231eaca8d58567;p=kernel.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 5fe39c43eb31 ("drivers/char: remove
     /dev/kmem for good")

   - Disallowed access to virtio-mem device memory via /dev/mem in
     commit d77d51d8c02 ("virtio-mem: disallow mapping virtio-mem memory
     via /dev/mem")

   - Sanitized access to virtio-mem device memory via /proc/kcore in
     commit 8232c50c1f26 ("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 3e5751b31fbc ("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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f52401640983e5c6d80447d1aa231eaca8d58567