From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Ingo Molnar <mingo@redhat.com>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Tom Lendacky <thomas.lendacky@amd.com>
Cc: Dave Hansen <dave.hansen@intel.com>,
Kai Huang <kai.huang@linux.intel.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv3 17/17] x86: Introduce CONFIG_X86_INTEL_MKTME
Date: Tue, 12 Jun 2018 17:39:15 +0300 [thread overview]
Message-ID: <20180612143915.68065-18-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20180612143915.68065-1-kirill.shutemov@linux.intel.com>
Add new config option to enabled/disable Multi-Key Total Memory
Encryption support.
MKTME uses MEMORY_PHYSICAL_PADDING to reserve enough space in per-KeyID
direct mappings for memory hotplug.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/x86/Kconfig | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4fa2cf807321..d013495bb4ae 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1513,6 +1513,23 @@ config ARCH_USE_MEMREMAP_PROT
def_bool y
depends on AMD_MEM_ENCRYPT
+config X86_INTEL_MKTME
+ bool "Intel Multi-Key Total Memory Encryption"
+ select DYNAMIC_PHYSICAL_MASK
+ select PAGE_EXTENSION
+ depends on X86_64 && CPU_SUP_INTEL
+ ---help---
+ Say yes to enable support for Multi-Key Total Memory Encryption.
+ This requires 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 to have 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"
@@ -2189,7 +2206,7 @@ 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
--
2.17.1
next prev parent reply other threads:[~2018-06-12 14:39 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-12 14:38 [PATCHv3 00/17] MKTME enabling Kirill A. Shutemov
2018-06-12 14:38 ` [PATCHv3 01/17] mm: Do no merge VMAs with different encryption KeyIDs Kirill A. Shutemov
2018-06-13 17:45 ` Dave Hansen
2018-06-13 20:13 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 02/17] mm/khugepaged: Do not collapse pages in encrypted VMAs Kirill A. Shutemov
2018-06-13 17:50 ` Dave Hansen
2018-06-13 20:18 ` Kirill A. Shutemov
2018-06-13 20:20 ` Dave Hansen
2018-06-13 20:38 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 03/17] mm/ksm: Do not merge pages with different KeyIDs Kirill A. Shutemov
2018-06-13 17:51 ` Dave Hansen
2018-06-13 20:31 ` Kirill A. Shutemov
2018-06-13 20:35 ` Dave Hansen
2018-06-13 20:40 ` Dave Hansen
2018-06-13 20:41 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 04/17] mm/page_alloc: Handle allocation for encrypted memory Kirill A. Shutemov
2018-06-13 18:07 ` Dave Hansen
2018-06-14 15:57 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 05/17] x86/mm: Mask out KeyID bits from page table entry pfn Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 06/17] x86/mm: Introduce variables to store number, shift and mask of KeyIDs Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify() Kirill A. Shutemov
2018-06-13 18:13 ` Dave Hansen
2018-06-15 12:57 ` Kirill A. Shutemov
2018-06-15 13:43 ` Dave Hansen
2018-06-15 15:27 ` Kirill A. Shutemov
2018-06-15 15:31 ` Dave Hansen
2018-06-15 16:06 ` Kirill A. Shutemov
2018-06-15 16:58 ` Dave Hansen
2018-06-15 20:45 ` Kirill A. Shutemov
2018-06-15 20:45 ` Dave Hansen
2018-06-15 20:55 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 08/17] x86/mm: Implement vma_is_encrypted() and vma_keyid() Kirill A. Shutemov
2018-06-13 18:18 ` Dave Hansen
2018-06-15 13:14 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 09/17] x86/mm: Implement page_keyid() using page_ext Kirill A. Shutemov
2018-06-13 18:20 ` Dave Hansen
2018-06-18 10:07 ` Kirill A. Shutemov
2018-06-18 12:54 ` Dave Hansen
2018-06-18 13:14 ` Kirill A. Shutemov
2018-06-22 15:39 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 10/17] x86/mm: Implement prep_encrypted_page() and arch_free_page() Kirill A. Shutemov
2018-06-13 18:26 ` Dave Hansen
2018-06-18 10:18 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 11/17] x86/mm: Rename CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 12/17] x86/mm: Allow to disable MKTME after enumeration Kirill A. Shutemov
2018-06-13 18:30 ` Dave Hansen
2018-06-18 10:59 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 13/17] x86/mm: Detect MKTME early Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 14/17] x86/mm: Introduce direct_mapping_size Kirill A. Shutemov
2018-06-12 14:58 ` Mika Penttilä
2018-06-12 20:07 ` Kirill A. Shutemov
2018-06-12 20:07 ` Kirill A. Shutemov
2018-06-13 18:37 ` Dave Hansen
2018-06-18 13:12 ` Kirill A. Shutemov
2018-06-18 13:22 ` Dave Hansen
2018-06-12 14:39 ` [PATCHv3 15/17] x86/mm: Implement sync_direct_mapping() Kirill A. Shutemov
2018-06-13 18:41 ` Dave Hansen
2018-06-18 13:33 ` Kirill A. Shutemov
2018-06-18 16:28 ` Dave Hansen
2018-06-25 9:29 ` Kirill A. Shutemov
2018-06-25 16:36 ` Dave Hansen
2018-06-25 17:00 ` Kirill A. Shutemov
2018-06-12 14:39 ` [PATCHv3 16/17] x86/mm: Handle encrypted memory in page_to_virt() and __pa() Kirill A. Shutemov
2018-06-13 18:43 ` Dave Hansen
2018-06-18 13:34 ` Kirill A. Shutemov
2018-06-18 13:59 ` Dave Hansen
2018-06-18 14:41 ` Kirill A. Shutemov
2018-06-12 14:39 ` Kirill A. Shutemov [this message]
2018-06-13 18:46 ` [PATCHv3 17/17] x86: Introduce CONFIG_X86_INTEL_MKTME Dave Hansen
2018-06-18 13:41 ` Kirill A. Shutemov
2018-06-28 18:52 ` [PATCHv3 00/17] MKTME enabling Pavel Machek
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