On Wed, 2 Nov 2022 11:07:28 -0500 Pankaj Gupta <pankaj.gupta@xxxxxxx> wrote: > 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. > > ... > > --- 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; Should this be backported into earlier kernels? Is b7b3c01b19159 a suitable Fixes: target?
