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Shutemov" X-Google-Original-From: "Kirill A. Shutemov" Received: by box.localdomain (Postfix, from userid 1000) id 6C43A1048A5; Wed, 31 Jul 2019 18:08:17 +0300 (+03) To: Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , David Howells Cc: Kees Cook , Dave Hansen , Kai Huang , Jacob Pan , Alison Schofield , linux-mm@kvack.org, kvm@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv2 53/59] x86: Introduce CONFIG_X86_INTEL_MKTME Date: Wed, 31 Jul 2019 18:08:07 +0300 Message-Id: <20190731150813.26289-54-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190731150813.26289-1-kirill.shutemov@linux.intel.com> References: <20190731150813.26289-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add new config option to enabled/disable Multi-Key Total Memory Encryption support. Signed-off-by: Kirill A. Shutemov --- arch/x86/Kconfig | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index f2cc88fe8ada..d8551b612f3b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1550,6 +1550,25 @@ 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" + depends on X86_64 && CPU_SUP_INTEL && !KASAN + select X86_MEM_ENCRYPT_COMMON + select PAGE_EXTENSION + select KEYS + select 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" @@ -2220,7 +2239,7 @@ 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 -- 2.21.0