mm/memremap.c: map FS_DAX device memory as decrypted
authorPankaj Gupta <pankaj.gupta@amd.com>
Wed, 2 Nov 2022 16:07:28 +0000 (11:07 -0500)
committerAndrew Morton <akpm@linux-foundation.org>
Tue, 8 Nov 2022 23:57:23 +0000 (15:57 -0800)
commit867400af90f1f953ff9e10b1b87ecaf9369a7eb8
tree8bb709bc2ea65c6ece6ff66115b6736735c02fac
parent624a2c94f5b7a08120aaf26b3275a17463789273
mm/memremap.c: map FS_DAX device memory as decrypted

virtio_pmem use devm_memremap_pages() to map the device memory.  By
default this memory is mapped as encrypted with SEV.  Guest reboot changes
the current encryption key and guest no longer properly decrypts the FSDAX
device meta data.

Mark the corresponding device memory region for FSDAX devices (mapped with
memremap_pages) as decrypted to retain the persistent memory property.

Link: https://lkml.kernel.org/r/20221102160728.3184016-1-pankaj.gupta@amd.com
Fixes: b7b3c01b19159 ("mm/memremap_pages: support multiple ranges per invocation")
Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/memremap.c