From 867400af90f1f953ff9e10b1b87ecaf9369a7eb8 Mon Sep 17 00:00:00 2001 From: Pankaj Gupta Date: Wed, 2 Nov 2022 11:07:28 -0500 Subject: [PATCH] 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 Cc: Dan Williams Cc: Tom Lendacky Cc: Signed-off-by: Andrew Morton --- mm/memremap.c | 1 + 1 file changed, 1 insertion(+) 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;