This is a note to let you know that I've just added the patch titled
mm/memremap.c: map FS_DAX device memory as decrypted
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-memremap.c-map-fs_dax-device-memory-as-decrypted.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 867400af90f1f953ff9e10b1b87ecaf9369a7eb8 Mon Sep 17 00:00:00 2001
From: Pankaj Gupta <pankaj.gupta@xxxxxxx>
Date: Wed, 2 Nov 2022 11:07:28 -0500
Subject: mm/memremap.c: map FS_DAX device memory as decrypted
From: Pankaj Gupta <pankaj.gupta@xxxxxxx>
commit 867400af90f1f953ff9e10b1b87ecaf9369a7eb8 upstream.
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@xxxxxxx
Fixes: b7b3c01b19159 ("mm/memremap_pages: support multiple ranges per invocation")
Signed-off-by: Pankaj Gupta <pankaj.gupta@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Tom Lendacky <thomas.lendacky@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/memremap.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -330,6 +330,7 @@ void *memremap_pages(struct dev_pagemap
WARN(1, "File system DAX not supported\n");
return ERR_PTR(-EINVAL);
}
+ params.pgprot = pgprot_decrypted(params.pgprot);
break;
case MEMORY_DEVICE_GENERIC:
break;
Patches currently in stable-queue which might be from pankaj.gupta@xxxxxxx are
queue-6.0/mm-memremap.c-map-fs_dax-device-memory-as-decrypted.patch
