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authorPankaj Gupta <pankaj.gupta@amd.com>2022-11-02 11:07:28 -0500
committerAndrew Morton <akpm@linux-foundation.org>2022-11-08 15:57:23 -0800
commit867400af90f1f953ff9e10b1b87ecaf9369a7eb8 (patch)
tree8bb709bc2ea65c6ece6ff66115b6736735c02fac
parent624a2c94f5b7a08120aaf26b3275a17463789273 (diff)
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>
-rw-r--r--mm/memremap.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/memremap.c b/mm/memremap.c
index 421bec3a29ee..08cbf54fe037 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -335,6 +335,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
WARN(1, "File system DAX not supported\n");
return ERR_PTR(-EINVAL);
}
+ params.pgprot = pgprot_decrypted(params.pgprot);
break;
case MEMORY_DEVICE_GENERIC:
break;