Persistent memory is expected to persist across reboots. The encryption key used by SME will change across reboots which will result in corrupted persistent memory. Persistent memory is handed out by block devices through memory remapping functions, so be sure not to map this memory as encrypted. Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx> --- arch/x86/mm/ioremap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index b0ff6bc..c6cb921 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -498,6 +498,8 @@ static bool memremap_should_map_encrypted(resource_size_t phys_addr, case E820_TYPE_ACPI: case E820_TYPE_NVS: case E820_TYPE_UNUSABLE: + case E820_TYPE_PMEM: + case E820_TYPE_PRAM: return false; default: break;
