[merged mm-hotfixes-stable] mm-memremapc-map-fs_dax-device-memory-as-decrypted.patch removed from -mm tree

[merged mm-hotfixes-stable] mm-memremapc-map-fs_dax-device-memory-as-decrypted.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/memremap.c: map FS_DAX device memory as decrypted
has been removed from the -mm tree.  Its filename was
     mm-memremapc-map-fs_dax-device-memory-as-decrypted.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Pankaj Gupta <pankaj.gupta@amd.com>
Subject: mm/memremap.c: map FS_DAX device memory as decrypted
Date: Wed, 2 Nov 2022 11:07:28 -0500

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 |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/memremap.c~mm-memremapc-map-fs_dax-device-memory-as-decrypted
+++ a/mm/memremap.c
@@ -335,6 +335,7 @@ 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 -mm which might be from pankaj.gupta@amd.com are