Add new config option to enabled/disable Multi-Key Total Memory
Encryption support.
Signed-off-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com>
---
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
