From: Ram Pai <linuxram@us.ibm.com> To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, dave.hansen@intel.com, hbabu@us.ibm.com, linuxram@us.ibm.com, arnd@arndb.de, akpm@linux-foundation.org, corbet@lwn.net, mingo@redhat.com Subject: [RFC v5 00/38] powerpc: Memory Protection Keys Date: Wed, 5 Jul 2017 14:21:37 -0700 [thread overview] Message-ID: <1499289735-14220-1-git-send-email-linuxram@us.ibm.com> (raw) Memory protection keys enable applications to protect its address space from inadvertent access or corruption from itself. The overall idea: A process allocates a key and associates it with an address range within its address space. The process then can dynamically set read/write permissions on the key without involving the kernel. Any code that violates the permissions of the address space; as defined by its associated key, will receive a segmentation fault. This patch series enables the feature on PPC64 HPTE platform. ISA3.0 section 5.7.13 describes the detailed specifications. Testing: This patch series has passed all the protection key tests available in the selftests directory. The tests are updated to work on both x86 and powerpc. version v5: (1) reverted back to the old design -- store the key in the pte, instead of bypassing it. The v4 design slowed down the hash page path. (2) detects key violation when kernel is told to access user pages. (3) further refined the patches into smaller consumable units (4) page faults handlers captures the faulting key from the pte instead of the vma. This closes a race between where the key update in the vma and a key fault caused cause by the key programmed in the pte. (5) a key created with access-denied should also set it up to deny write. Fixed it. (6) protection-key number is displayed in smaps the x86 way. version v4: (1) patches no more depend on the pte bits to program the hpte -- comment by Balbir (2) documentation updates (3) fixed a bug in the selftest. (4) unlike x86, powerpc lets signal handler change key permission bits; the change will persist across signal handler boundaries. Earlier we allowed the signal handler to modify a field in the siginfo structure which would than be used by the kernel to program the key protection register (AMR) -- resolves a issue raised by Ben. "Calls to sys_swapcontext with a made-up context will end up with a crap AMR if done by code who didn't know about that register". (5) these changes enable protection keys on 4k-page kernel aswell. version v3: (1) split the patches into smaller consumable patches. (2) added the ability to disable execute permission on a key at creation. (3) rename calc_pte_to_hpte_pkey_bits() to pte_to_hpte_pkey_bits() -- suggested by Anshuman (4) some code optimization and clarity in do_page_fault() (5) A bug fix while invalidating a hpte slot in __hash_page_4K() -- noticed by Aneesh version v2: (1) documentation and selftest added (2) fixed a bug in 4k hpte backed 64k pte where page invalidation was not done correctly, and initialization of second-part-of-the-pte was not done correctly if the pte was not yet Hashed with a hpte. Reported by Aneesh. (3) Fixed ABI breakage caused in siginfo structure. Reported by Anshuman. version v1: Initial version Ram Pai (38): powerpc: Free up four 64K PTE bits in 4K backed HPTE pages powerpc: Free up four 64K PTE bits in 64K backed HPTE pages powerpc: introduce pte_set_hash_slot() helper powerpc: introduce pte_get_hash_gslot() helper powerpc: capture the PTE format changes in the dump pte report powerpc: use helper functions in __hash_page_64K() for 64K PTE powerpc: use helper functions in __hash_page_huge() for 64K PTE powerpc: use helper functions in __hash_page_4K() for 64K PTE powerpc: use helper functions in __hash_page_4K() for 4K PTE powerpc: use helper functions in flush_hash_page() mm: introduce an additional vma bit for powerpc pkey mm: ability to disable execute permission on a key at creation x86: disallow pkey creation with PKEY_DISABLE_EXECUTE powerpc: initial plumbing for key management powerpc: helper function to read,write AMR,IAMR,UAMOR registers powerpc: implementation for arch_set_user_pkey_access() powerpc: sys_pkey_alloc() and sys_pkey_free() system calls powerpc: store and restore the pkey state across context switches powerpc: introduce execute-only pkey powerpc: ability to associate pkey to a vma powerpc: implementation for arch_override_mprotect_pkey() powerpc: map vma key-protection bits to pte key bits. powerpc: sys_pkey_mprotect() system call powerpc: Program HPTE key protection bits powerpc: helper to validate key-access permissions of a pte powerpc: check key protection for user page access powerpc: Macro the mask used for checking DSI exception powerpc: implementation for arch_vma_access_permitted() powerpc: Handle exceptions caused by pkey violation powerpc: capture AMR register content on pkey violation powerpc: introduce get_pte_pkey() helper powerpc: capture the violated protection key on fault powerpc: Deliver SEGV signal on pkey violation procfs: display the protection-key number associated with a vma selftest: Move protecton key selftest to arch neutral directory selftest: PowerPC specific test updates to memory protection keys Documentation: Move protecton key documentation to arch neutral directory Documentation: PowerPC specific updates to memory protection keys Documentation/vm/protection-keys.txt | 130 +++ Documentation/x86/protection-keys.txt | 85 -- arch/powerpc/Kconfig | 16 + arch/powerpc/include/asm/book3s/64/hash-4k.h | 20 + arch/powerpc/include/asm/book3s/64/hash-64k.h | 60 +- arch/powerpc/include/asm/book3s/64/hash.h | 7 +- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 10 + arch/powerpc/include/asm/book3s/64/mmu.h | 10 + arch/powerpc/include/asm/book3s/64/pgtable.h | 96 ++- arch/powerpc/include/asm/mman.h | 16 +- arch/powerpc/include/asm/mmu_context.h | 5 + arch/powerpc/include/asm/paca.h | 4 + arch/powerpc/include/asm/pkeys.h | 159 +++ arch/powerpc/include/asm/processor.h | 5 + arch/powerpc/include/asm/reg.h | 7 +- arch/powerpc/include/asm/systbl.h | 3 + arch/powerpc/include/asm/unistd.h | 6 +- arch/powerpc/include/uapi/asm/ptrace.h | 3 +- arch/powerpc/include/uapi/asm/unistd.h | 3 + arch/powerpc/kernel/asm-offsets.c | 6 + arch/powerpc/kernel/exceptions-64s.S | 2 +- arch/powerpc/kernel/process.c | 18 + arch/powerpc/kernel/setup_64.c | 8 + arch/powerpc/kernel/signal_32.c | 5 + arch/powerpc/kernel/signal_64.c | 4 + arch/powerpc/kernel/traps.c | 14 + arch/powerpc/mm/Makefile | 1 + arch/powerpc/mm/dump_linuxpagetables.c | 3 +- arch/powerpc/mm/fault.c | 26 + arch/powerpc/mm/hash64_4k.c | 14 +- arch/powerpc/mm/hash64_64k.c | 124 ++- arch/powerpc/mm/hash_utils_64.c | 68 +- arch/powerpc/mm/hugetlbpage-hash64.c | 16 +- arch/powerpc/mm/mmu_context_book3s64.c | 5 + arch/powerpc/mm/pkeys.c | 243 ++++ arch/x86/kernel/fpu/xstate.c | 3 + fs/proc/task_mmu.c | 6 +- include/linux/mm.h | 18 +- include/uapi/asm-generic/mman-common.h | 4 +- tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/pkey-helpers.h | 365 ++++++ tools/testing/selftests/vm/protection_keys.c | 1488 +++++++++++++++++++++++++ tools/testing/selftests/x86/Makefile | 2 +- tools/testing/selftests/x86/pkey-helpers.h | 219 ---- tools/testing/selftests/x86/protection_keys.c | 1395 ----------------------- 45 files changed, 2872 insertions(+), 1831 deletions(-) create mode 100644 Documentation/vm/protection-keys.txt delete mode 100644 Documentation/x86/protection-keys.txt create mode 100644 arch/powerpc/include/asm/pkeys.h create mode 100644 arch/powerpc/mm/pkeys.c create mode 100644 tools/testing/selftests/vm/pkey-helpers.h create mode 100644 tools/testing/selftests/vm/protection_keys.c delete mode 100644 tools/testing/selftests/x86/pkey-helpers.h delete mode 100644 tools/testing/selftests/x86/protection_keys.c
WARNING: multiple messages have this Message-ID (diff)
From: Ram Pai <linuxram@us.ibm.com> To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, dave.hansen@intel.com, hbabu@us.ibm.com, linuxram@us.ibm.com, arnd@arndb.de, akpm@linux-foundation.org, corbet@lwn.net, mingo@redhat.com Subject: [RFC v5 00/38] powerpc: Memory Protection Keys Date: Wed, 5 Jul 2017 14:21:37 -0700 [thread overview] Message-ID: <1499289735-14220-1-git-send-email-linuxram@us.ibm.com> (raw) Memory protection keys enable applications to protect its address space from inadvertent access or corruption from itself. The overall idea: A process allocates a key and associates it with an address range within its address space. The process then can dynamically set read/write permissions on the key without involving the kernel. Any code that violates the permissions of the address space; as defined by its associated key, will receive a segmentation fault. This patch series enables the feature on PPC64 HPTE platform. ISA3.0 section 5.7.13 describes the detailed specifications. Testing: This patch series has passed all the protection key tests available in the selftests directory. The tests are updated to work on both x86 and powerpc. version v5: (1) reverted back to the old design -- store the key in the pte, instead of bypassing it. The v4 design slowed down the hash page path. (2) detects key violation when kernel is told to access user pages. (3) further refined the patches into smaller consumable units (4) page faults handlers captures the faulting key from the pte instead of the vma. This closes a race between where the key update in the vma and a key fault caused cause by the key programmed in the pte. (5) a key created with access-denied should also set it up to deny write. Fixed it. (6) protection-key number is displayed in smaps the x86 way. version v4: (1) patches no more depend on the pte bits to program the hpte -- comment by Balbir (2) documentation updates (3) fixed a bug in the selftest. (4) unlike x86, powerpc lets signal handler change key permission bits; the change will persist across signal handler boundaries. Earlier we allowed the signal handler to modify a field in the siginfo structure which would than be used by the kernel to program the key protection register (AMR) -- resolves a issue raised by Ben. "Calls to sys_swapcontext with a made-up context will end up with a crap AMR if done by code who didn't know about that register". (5) these changes enable protection keys on 4k-page kernel aswell. version v3: (1) split the patches into smaller consumable patches. (2) added the ability to disable execute permission on a key at creation. (3) rename calc_pte_to_hpte_pkey_bits() to pte_to_hpte_pkey_bits() -- suggested by Anshuman (4) some code optimization and clarity in do_page_fault() (5) A bug fix while invalidating a hpte slot in __hash_page_4K() -- noticed by Aneesh version v2: (1) documentation and selftest added (2) fixed a bug in 4k hpte backed 64k pte where page invalidation was not done correctly, and initialization of second-part-of-the-pte was not done correctly if the pte was not yet Hashed with a hpte. Reported by Aneesh. (3) Fixed ABI breakage caused in siginfo structure. Reported by Anshuman. version v1: Initial version Ram Pai (38): powerpc: Free up four 64K PTE bits in 4K backed HPTE pages powerpc: Free up four 64K PTE bits in 64K backed HPTE pages powerpc: introduce pte_set_hash_slot() helper powerpc: introduce pte_get_hash_gslot() helper powerpc: capture the PTE format changes in the dump pte report powerpc: use helper functions in __hash_page_64K() for 64K PTE powerpc: use helper functions in __hash_page_huge() for 64K PTE powerpc: use helper functions in __hash_page_4K() for 64K PTE powerpc: use helper functions in __hash_page_4K() for 4K PTE powerpc: use helper functions in flush_hash_page() mm: introduce an additional vma bit for powerpc pkey mm: ability to disable execute permission on a key at creation x86: disallow pkey creation with PKEY_DISABLE_EXECUTE powerpc: initial plumbing for key management powerpc: helper function to read,write AMR,IAMR,UAMOR registers powerpc: implementation for arch_set_user_pkey_access() powerpc: sys_pkey_alloc() and sys_pkey_free() system calls powerpc: store and restore the pkey state across context switches powerpc: introduce execute-only pkey powerpc: ability to associate pkey to a vma powerpc: implementation for arch_override_mprotect_pkey() powerpc: map vma key-protection bits to pte key bits. powerpc: sys_pkey_mprotect() system call powerpc: Program HPTE key protection bits powerpc: helper to validate key-access permissions of a pte powerpc: check key protection for user page access powerpc: Macro the mask used for checking DSI exception powerpc: implementation for arch_vma_access_permitted() powerpc: Handle exceptions caused by pkey violation powerpc: capture AMR register content on pkey violation powerpc: introduce get_pte_pkey() helper powerpc: capture the violated protection key on fault powerpc: Deliver SEGV signal on pkey violation procfs: display the protection-key number associated with a vma selftest: Move protecton key selftest to arch neutral directory selftest: PowerPC specific test updates to memory protection keys Documentation: Move protecton key documentation to arch neutral directory Documentation: PowerPC specific updates to memory protection keys Documentation/vm/protection-keys.txt | 130 +++ Documentation/x86/protection-keys.txt | 85 -- arch/powerpc/Kconfig | 16 + arch/powerpc/include/asm/book3s/64/hash-4k.h | 20 + arch/powerpc/include/asm/book3s/64/hash-64k.h | 60 +- arch/powerpc/include/asm/book3s/64/hash.h | 7 +- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 10 + arch/powerpc/include/asm/book3s/64/mmu.h | 10 + arch/powerpc/include/asm/book3s/64/pgtable.h | 96 ++- arch/powerpc/include/asm/mman.h | 16 +- arch/powerpc/include/asm/mmu_context.h | 5 + arch/powerpc/include/asm/paca.h | 4 + arch/powerpc/include/asm/pkeys.h | 159 +++ arch/powerpc/include/asm/processor.h | 5 + arch/powerpc/include/asm/reg.h | 7 +- arch/powerpc/include/asm/systbl.h | 3 + arch/powerpc/include/asm/unistd.h | 6 +- arch/powerpc/include/uapi/asm/ptrace.h | 3 +- arch/powerpc/include/uapi/asm/unistd.h | 3 + arch/powerpc/kernel/asm-offsets.c | 6 + arch/powerpc/kernel/exceptions-64s.S | 2 +- arch/powerpc/kernel/process.c | 18 + arch/powerpc/kernel/setup_64.c | 8 + arch/powerpc/kernel/signal_32.c | 5 + arch/powerpc/kernel/signal_64.c | 4 + arch/powerpc/kernel/traps.c | 14 + arch/powerpc/mm/Makefile | 1 + arch/powerpc/mm/dump_linuxpagetables.c | 3 +- arch/powerpc/mm/fault.c | 26 + arch/powerpc/mm/hash64_4k.c | 14 +- arch/powerpc/mm/hash64_64k.c | 124 ++- arch/powerpc/mm/hash_utils_64.c | 68 +- arch/powerpc/mm/hugetlbpage-hash64.c | 16 +- arch/powerpc/mm/mmu_context_book3s64.c | 5 + arch/powerpc/mm/pkeys.c | 243 ++++ arch/x86/kernel/fpu/xstate.c | 3 + fs/proc/task_mmu.c | 6 +- include/linux/mm.h | 18 +- include/uapi/asm-generic/mman-common.h | 4 +- tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/pkey-helpers.h | 365 ++++++ tools/testing/selftests/vm/protection_keys.c | 1488 +++++++++++++++++++++++++ tools/testing/selftests/x86/Makefile | 2 +- tools/testing/selftests/x86/pkey-helpers.h | 219 ---- tools/testing/selftests/x86/protection_keys.c | 1395 ----------------------- 45 files changed, 2872 insertions(+), 1831 deletions(-) create mode 100644 Documentation/vm/protection-keys.txt delete mode 100644 Documentation/x86/protection-keys.txt create mode 100644 arch/powerpc/include/asm/pkeys.h create mode 100644 arch/powerpc/mm/pkeys.c create mode 100644 tools/testing/selftests/vm/pkey-helpers.h create mode 100644 tools/testing/selftests/vm/protection_keys.c delete mode 100644 tools/testing/selftests/x86/pkey-helpers.h delete mode 100644 tools/testing/selftests/x86/protection_keys.c -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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next reply other threads:[~2017-07-05 21:22 UTC|newest] Thread overview: 191+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-07-05 21:21 Ram Pai [this message] 2017-07-05 21:21 ` [RFC v5 00/38] powerpc: Memory Protection Keys Ram Pai 2017-07-05 21:21 ` [RFC v5 01/38] powerpc: Free up four 64K PTE bits in 4K backed HPTE pages Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-07 7:25 ` Balbir Singh 2017-07-07 7:25 ` Balbir Singh 2017-07-07 7:25 ` Balbir Singh 2017-07-05 21:21 ` [RFC v5 02/38] powerpc: Free up four 64K PTE bits in 64K " Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-11 5:59 ` Balbir Singh 2017-07-11 5:59 ` Balbir Singh 2017-07-11 15:44 ` Ram Pai 2017-07-11 15:44 ` Ram Pai 2017-07-12 3:10 ` Balbir Singh 2017-07-12 3:10 ` Balbir Singh 2017-07-13 7:39 ` Ram Pai 2017-07-13 7:39 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 03/38] powerpc: introduce pte_set_hash_slot() helper Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 04/38] powerpc: introduce pte_get_hash_gslot() helper Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 05/38] powerpc: capture the PTE format changes in the dump pte report Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 06/38] powerpc: use helper functions in __hash_page_64K() for 64K PTE Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 07/38] powerpc: use helper functions in __hash_page_huge() " Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 08/38] powerpc: use helper functions in __hash_page_4K() " Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 09/38] powerpc: use helper functions in __hash_page_4K() for 4K PTE Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 10/38] powerpc: use helper functions in flush_hash_page() Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 11/38] mm: introduce an additional vma bit for powerpc pkey Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-11 18:10 ` Dave Hansen 2017-07-11 18:10 ` Dave Hansen 2017-07-12 22:23 ` Ram Pai 2017-07-12 22:23 ` Ram Pai 2017-07-12 22:40 ` Benjamin Herrenschmidt 2017-07-12 22:40 ` Benjamin Herrenschmidt 2017-07-05 21:21 ` [RFC v5 12/38] mm: ability to disable execute permission on a key at creation Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-11 18:11 ` Dave Hansen 2017-07-11 18:11 ` Dave Hansen 2017-07-11 21:29 ` Benjamin Herrenschmidt 2017-07-11 21:29 ` Benjamin Herrenschmidt 2017-07-11 21:51 ` Ram Pai 2017-07-11 21:51 ` Ram Pai 2017-07-11 21:57 ` Dave Hansen 2017-07-11 21:57 ` Dave Hansen 2017-07-11 22:14 ` Ram Pai 2017-07-11 22:14 ` Ram Pai 2017-07-11 22:19 ` Dave Hansen 2017-07-11 22:19 ` Dave Hansen 2017-07-11 22:08 ` Benjamin Herrenschmidt 2017-07-11 22:08 ` Benjamin Herrenschmidt 2017-07-11 22:19 ` Ram Pai 2017-07-11 22:19 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 13/38] x86: disallow pkey creation with PKEY_DISABLE_EXECUTE Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-11 18:12 ` Dave Hansen 2017-07-11 18:12 ` Dave Hansen 2017-07-05 21:21 ` [RFC v5 14/38] powerpc: initial plumbing for key management Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-12 3:28 ` Balbir Singh 2017-07-12 3:28 ` Balbir Singh 2017-07-13 7:45 ` Ram Pai 2017-07-13 7:45 ` Ram Pai 2017-07-13 20:37 ` Ram Pai 2017-07-13 20:37 ` Ram Pai 2017-07-13 21:30 ` Balbir Singh 2017-07-13 21:30 ` Balbir Singh 2017-07-13 21:30 ` Balbir Singh 2017-07-13 21:30 ` Balbir Singh 2017-07-05 21:21 ` [RFC v5 15/38] powerpc: helper function to read,write AMR,IAMR,UAMOR registers Ram Pai 2017-07-05 21:21 ` [RFC v5 15/38] powerpc: helper function to read, write AMR, IAMR, UAMOR registers Ram Pai 2017-07-05 21:21 ` [RFC v5 15/38] powerpc: helper function to read,write AMR,IAMR,UAMOR registers Ram Pai 2017-07-12 5:26 ` Balbir Singh 2017-07-12 5:26 ` Balbir Singh 2017-07-13 7:55 ` Ram Pai 2017-07-13 7:55 ` Ram Pai 2017-07-13 9:49 ` Balbir Singh 2017-07-13 9:49 ` Balbir Singh 2017-07-13 9:49 ` Balbir Singh 2017-07-13 23:29 ` Ram Pai 2017-07-13 23:29 ` Ram Pai 2017-07-13 23:29 ` Ram Pai 2017-07-13 23:29 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 16/38] powerpc: implementation for arch_set_user_pkey_access() Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 17/38] powerpc: sys_pkey_alloc() and sys_pkey_free() system calls Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 18/38] powerpc: store and restore the pkey state across context switches Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 19/38] powerpc: introduce execute-only pkey Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 20/38] powerpc: ability to associate pkey to a vma Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 21/38] powerpc: implementation for arch_override_mprotect_pkey() Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:21 ` [RFC v5 22/38] powerpc: map vma key-protection bits to pte key bits Ram Pai 2017-07-05 21:21 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 23/38] powerpc: sys_pkey_mprotect() system call Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 24/38] powerpc: Program HPTE key protection bits Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 25/38] powerpc: helper to validate key-access permissions of a pte Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 26/38] powerpc: check key protection for user page access Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 27/38] powerpc: Macro the mask used for checking DSI exception Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 28/38] powerpc: implementation for arch_vma_access_permitted() Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 29/38] powerpc: Handle exceptions caused by pkey violation Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 30/38] powerpc: capture AMR register content on " Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 31/38] powerpc: introduce get_pte_pkey() helper Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-10 3:11 ` Anshuman Khandual 2017-07-10 3:11 ` Anshuman Khandual 2017-07-10 5:55 ` Ram Pai 2017-07-10 5:55 ` Ram Pai 2017-07-11 11:22 ` Anshuman Khandual 2017-07-11 11:22 ` Anshuman Khandual 2017-07-05 21:22 ` [RFC v5 32/38] powerpc: capture the violated protection key on fault Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-10 3:10 ` Anshuman Khandual 2017-07-10 3:10 ` Anshuman Khandual 2017-07-10 5:49 ` Ram Pai 2017-07-10 5:49 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 33/38] powerpc: Deliver SEGV signal on pkey violation Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-10 3:08 ` Anshuman Khandual 2017-07-10 3:08 ` Anshuman Khandual 2017-07-05 21:22 ` [RFC v5 34/38] procfs: display the protection-key number associated with a vma Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-10 3:07 ` Anshuman Khandual 2017-07-10 3:07 ` Anshuman Khandual 2017-07-10 6:01 ` Ram Pai 2017-07-10 6:01 ` Ram Pai 2017-07-11 18:13 ` Dave Hansen 2017-07-11 18:13 ` Dave Hansen 2017-07-13 8:03 ` Ram Pai 2017-07-13 8:03 ` Ram Pai 2017-07-13 14:07 ` Dave Hansen 2017-07-13 14:07 ` Dave Hansen 2017-07-13 17:04 ` Ram Pai 2017-07-13 17:04 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 35/38] selftest: Move protecton key selftest to arch neutral directory Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 36/38] selftest: PowerPC specific test updates to memory protection keys Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-11 17:33 ` Dave Hansen 2017-07-11 17:33 ` Dave Hansen 2017-07-12 21:57 ` Ram Pai 2017-07-12 21:57 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 37/38] Documentation: Move protecton key documentation to arch neutral directory Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-05 21:22 ` [RFC v5 38/38] Documentation: PowerPC specific updates to memory protection keys Ram Pai 2017-07-05 21:22 ` Ram Pai 2017-07-10 3:07 ` Anshuman Khandual 2017-07-10 3:07 ` Anshuman Khandual 2017-07-10 5:59 ` Ram Pai 2017-07-10 5:59 ` Ram Pai 2017-07-11 18:23 ` Dave Hansen 2017-07-11 18:23 ` Dave Hansen 2017-07-13 19:56 ` Ram Pai 2017-07-13 19:56 ` Ram Pai 2017-07-10 5:43 ` [RFC v5 00/38] powerpc: Memory Protection Keys Anshuman Khandual 2017-07-10 5:43 ` Anshuman Khandual 2017-07-10 6:05 ` Ram Pai 2017-07-10 6:05 ` Ram Pai 2017-07-10 17:15 ` Ram Pai 2017-07-10 17:15 ` Ram Pai 2017-07-11 14:52 ` Michal Hocko 2017-07-11 14:52 ` Michal Hocko 2017-07-11 19:32 ` Ram Pai 2017-07-11 19:32 ` Ram Pai 2017-07-11 21:30 ` Benjamin Herrenschmidt 2017-07-11 21:30 ` Benjamin Herrenschmidt 2017-07-12 7:23 ` Michal Hocko 2017-07-12 7:23 ` Michal Hocko 2017-07-12 7:39 ` Michal Hocko 2017-07-12 7:39 ` Michal Hocko 2017-07-12 22:53 ` Benjamin Herrenschmidt 2017-07-12 22:53 ` Benjamin Herrenschmidt 2017-07-13 6:20 ` Michal Hocko 2017-07-13 6:20 ` Michal Hocko
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