fuse: mark DAX VMA page protections as decrypted

In confidential computing guest environments (such as AMD SEV-SNP or
Intel TDX), direct memory access (DAX) mappings between the guest kernel
and host-backed FUSE/virtiofs shared memory regions must be accessed
using shared (decrypted) page protections.

Modify fuse_dax_mmap() to apply pgprot_decrypted() to vma->vm_page_prot
when establishing FUSE DAX memory mappings. This ensures guest page
table entries for shared DAX buffers are explicitly marked as decrypted,
preventing memory encryption faults when accessing host-shared DAX memory.

Signed-off-by: Punit Salian <psalian@google.com>
Acked-by: Pankaj Gupta <pankaj.gupta@amd.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

0 files changed, 0 insertions, 0 deletions