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: [PATCHv5 11/19] x86/mm: Implement vma_keyid()
Date: Tue, 17 Jul 2018 14:20:21 +0300 [thread overview]
Message-ID: <20180717112029.42378-12-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20180717112029.42378-1-kirill.shutemov@linux.intel.com>
We store KeyID in upper bits for vm_page_prot that match position of
KeyID in PTE. vma_keyid() extracts KeyID from vm_page_prot.
With KeyID in vm_page_prot we don't need to modify any page table helper
to propagate the KeyID to page table entires.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/x86/include/asm/mktme.h | 5 +++++
arch/x86/mm/mktme.c | 12 ++++++++++++
2 files changed, 17 insertions(+)
diff --git a/arch/x86/include/asm/mktme.h b/arch/x86/include/asm/mktme.h
index 7266494b4f0a..f0b7844e36a4 100644
--- a/arch/x86/include/asm/mktme.h
+++ b/arch/x86/include/asm/mktme.h
@@ -4,6 +4,8 @@
#include <linux/types.h>
#include <linux/page_ext.h>
+struct vm_area_struct;
+
#ifdef CONFIG_X86_INTEL_MKTME
extern phys_addr_t mktme_keyid_mask;
extern int mktme_nr_keyids;
@@ -14,6 +16,9 @@ extern struct page_ext_operations page_mktme_ops;
#define page_keyid page_keyid
int page_keyid(const struct page *page);
+#define vma_keyid vma_keyid
+int vma_keyid(struct vm_area_struct *vma);
+
#else
#define mktme_keyid_mask ((phys_addr_t)0)
#define mktme_nr_keyids 0
diff --git a/arch/x86/mm/mktme.c b/arch/x86/mm/mktme.c
index 09cbff678b9f..a1f40ee61b25 100644
--- a/arch/x86/mm/mktme.c
+++ b/arch/x86/mm/mktme.c
@@ -1,3 +1,4 @@
+#include <linux/mm.h>
#include <asm/mktme.h>
phys_addr_t mktme_keyid_mask;
@@ -37,3 +38,14 @@ struct page_ext_operations page_mktme_ops = {
.need = need_page_mktme,
.init = init_page_mktme,
};
+
+int vma_keyid(struct vm_area_struct *vma)
+{
+ pgprotval_t prot;
+
+ if (!mktme_enabled())
+ return 0;
+
+ prot = pgprot_val(vma->vm_page_prot);
+ return (prot & mktme_keyid_mask) >> mktme_keyid_shift;
+}
--
2.18.0
next prev parent reply other threads:[~2018-07-17 11:22 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-17 11:20 [PATCHv5 00/19] MKTME enabling Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 01/19] mm: Do no merge VMAs with different encryption KeyIDs Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 02/19] mm: Do not use zero page in encrypted pages Kirill A. Shutemov
2018-07-18 17:36 ` Dave Hansen
2018-07-19 7:16 ` Kirill A. Shutemov
2018-07-19 13:58 ` Dave Hansen
2018-07-20 12:16 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 03/19] mm/ksm: Do not merge pages with different KeyIDs Kirill A. Shutemov
2018-07-18 17:38 ` Dave Hansen
2018-07-19 7:32 ` Kirill A. Shutemov
2018-07-19 14:02 ` Dave Hansen
2018-07-20 12:23 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 04/19] mm/page_alloc: Unify alloc_hugepage_vma() Kirill A. Shutemov
2018-07-18 17:43 ` Dave Hansen
2018-07-17 11:20 ` [PATCHv5 05/19] mm/page_alloc: Handle allocation for encrypted memory Kirill A. Shutemov
2018-07-18 23:03 ` Dave Hansen
2018-07-19 8:27 ` Kirill A. Shutemov
2018-07-19 14:05 ` Dave Hansen
2018-07-20 12:25 ` Kirill A. Shutemov
2018-07-26 14:25 ` Michal Hocko
2018-07-17 11:20 ` [PATCHv5 06/19] mm/khugepaged: Handle encrypted pages Kirill A. Shutemov
2018-07-18 23:11 ` Dave Hansen
2018-07-19 8:59 ` Kirill A. Shutemov
2018-07-19 14:13 ` Dave Hansen
2018-07-20 12:29 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 07/19] x86/mm: Mask out KeyID bits from page table entry pfn Kirill A. Shutemov
2018-07-18 23:13 ` Dave Hansen
2018-07-19 9:54 ` Kirill A. Shutemov
2018-07-19 14:19 ` Dave Hansen
2018-07-20 12:31 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 08/19] x86/mm: Introduce variables to store number, shift and mask of KeyIDs Kirill A. Shutemov
2018-07-18 23:19 ` Dave Hansen
2018-07-19 10:21 ` Kirill A. Shutemov
2018-07-19 12:37 ` Thomas Gleixner
2018-07-19 13:12 ` Kirill A. Shutemov
2018-07-19 13:18 ` Thomas Gleixner
2018-07-19 13:23 ` Kirill A. Shutemov
2018-07-19 13:40 ` Thomas Gleixner
2018-07-20 12:34 ` Kirill A. Shutemov
2018-07-20 13:17 ` Thomas Gleixner
2018-07-20 13:40 ` Kirill A. Shutemov
2018-07-19 14:23 ` Dave Hansen
2018-07-20 12:34 ` Kirill A. Shutemov
2018-07-31 0:08 ` Kai Huang
2018-07-17 11:20 ` [PATCHv5 09/19] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify() Kirill A. Shutemov
2018-07-18 23:30 ` Dave Hansen
2018-07-20 12:42 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 10/19] x86/mm: Implement page_keyid() using page_ext Kirill A. Shutemov
2018-07-18 23:38 ` Dave Hansen
2018-07-23 9:45 ` Kirill A. Shutemov
2018-07-23 17:22 ` Alison Schofield
2018-07-17 11:20 ` Kirill A. Shutemov [this message]
2018-07-18 23:40 ` [PATCHv5 11/19] x86/mm: Implement vma_keyid() Dave Hansen
2018-07-23 9:47 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 12/19] x86/mm: Implement prep_encrypted_page() and arch_free_page() Kirill A. Shutemov
2018-07-18 23:53 ` Dave Hansen
2018-07-23 9:50 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 13/19] x86/mm: Rename CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 14/19] x86/mm: Allow to disable MKTME after enumeration Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 15/19] x86/mm: Detect MKTME early Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 16/19] x86/mm: Calculate direct mapping size Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 17/19] x86/mm: Implement sync_direct_mapping() Kirill A. Shutemov
2018-07-19 0:01 ` Dave Hansen
2018-07-23 10:04 ` Kirill A. Shutemov
2018-07-23 12:25 ` Dave Hansen
2018-07-17 11:20 ` [PATCHv5 18/19] x86/mm: Handle encrypted memory in page_to_virt() and __pa() Kirill A. Shutemov
2018-07-18 22:21 ` Thomas Gleixner
2018-07-23 10:12 ` Kirill A. Shutemov
2018-07-26 17:26 ` Dave Hansen
2018-07-27 13:49 ` Kirill A. Shutemov
2018-07-17 11:20 ` [PATCHv5 19/19] x86: Introduce CONFIG_X86_INTEL_MKTME Kirill A. Shutemov
2018-08-15 7:48 ` Pavel Machek
2018-08-17 9:24 ` Kirill A. Shutemov
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