Add new config option to enabled/disable Multi-Key Total Memory Encryption support. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> --- arch/x86/Kconfig | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index ce9642e2c31b..4d2cfee50102 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1533,6 +1533,27 @@ config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT If set to N, then the encryption of system memory can be activated with the mem_encrypt=on command line option. +config X86_INTEL_MKTME + bool "Intel Multi-Key Total Memory Encryption" + select DYNAMIC_PHYSICAL_MASK + select PAGE_EXTENSION + select X86_MEM_ENCRYPT_COMMON + depends on X86_64 && CPU_SUP_INTEL && !KASAN + depends on KEYS + depends on !MEMORY_HOTPLUG_DEFAULT_ONLINE + depends on ACPI_HMAT + ---help--- + Say yes to enable support for Multi-Key Total Memory Encryption. + This requires an Intel processor that has support of the feature. + + Multikey Total Memory Encryption (MKTME) is a technology that allows + transparent memory encryption in upcoming Intel platforms. + + MKTME is built on top of TME. TME allows encryption of the entirety + of system memory using a single key. MKTME allows having multiple + encryption domains, each having own key -- different memory pages can + be encrypted with different keys. + # Common NUMA Features config NUMA bool "Numa Memory Allocation and Scheduler Support" @@ -2207,7 +2228,7 @@ config RANDOMIZE_MEMORY config MEMORY_PHYSICAL_PADDING hex "Physical memory mapping padding" if EXPERT - depends on RANDOMIZE_MEMORY + depends on RANDOMIZE_MEMORY || X86_INTEL_MKTME default "0xa" if MEMORY_HOTPLUG default "0x0" range 0x1 0x40 if MEMORY_HOTPLUG -- 2.20.1
