[PATCH v10 02/24] selftests/vm: rename all references to pkru to a generic name

some pkru references are named to pkey_reg and some prku references are renamed to pkey Signed-off-by: Ram Pai --- tools/testing/selftests/vm/pkey-helpers.h| 85 +- tools/testing/selftests/vm/protection_keys.c | 227 ++ 2 files changed, 164 insertions

[PATCH v10 04/24] selftests/vm: typecast the pkey register

This is in preparation to accomadate a differing size register across architectures. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 27 +- tools/testing/selftests/vm/protection_keys.c | 69 ++ 2 files c

[PATCH v10 04/24] selftests/vm: typecast the pkey register

This is in preparation to accomadate a differing size register across architectures. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/pkey-helpers.h| 27 +- tools/testing/selftests/vm/protection_keys.c | 69 ++ 2 files changed, 51 insertions(+), 45

[PATCH v10 07/24] selftests/vm: fixed bugs in pkey_disable_clear()

instead of clearing the bits, pkey_disable_clear() was setting the bits. Fixed it. Also fixed a wrong assertion in that function. When bits are cleared, the resulting bit value will be less than the original. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selfte

[PATCH v10 07/24] selftests/vm: fixed bugs in pkey_disable_clear()

instead of clearing the bits, pkey_disable_clear() was setting the bits. Fixed it. Also fixed a wrong assertion in that function. When bits are cleared, the resulting bit value will be less than the original. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c |4

[PATCH v10 08/24] selftests/vm: clear the bits in shadow reg when a pkey is freed.

When a key is freed, the key is no more effective. Clear the bits corresponding to the pkey in the shadow register. Otherwise it will carry some spurious bits which can trigger false-positive asserts. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selfte

[PATCH v10 08/24] selftests/vm: clear the bits in shadow reg when a pkey is freed.

When a key is freed, the key is no more effective. Clear the bits corresponding to the pkey in the shadow register. Otherwise it will carry some spurious bits which can trigger false-positive asserts. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c |3 +++ 1

[PATCH v10 05/24] selftests/vm: generic function to handle shadow key register

helper functions to handler shadow pkey register Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 27 tools/testing/selftests/vm/protection_keys.c | 34 - 2 files changed, 49 insertions(

[PATCH v10 05/24] selftests/vm: generic function to handle shadow key register

helper functions to handler shadow pkey register Signed-off-by: Ram Pai --- tools/testing/selftests/vm/pkey-helpers.h| 27 tools/testing/selftests/vm/protection_keys.c | 34 - 2 files changed, 49 insertions(+), 12 deletions(-) diff --git

[PATCH v10 09/24] selftests/vm: fix alloc_random_pkey() to make it really random

alloc_random_pkey() was allocating the same pkey every time. Not all pkeys were geting tested. fixed it. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c | 10 +++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/t

[PATCH v10 09/24] selftests/vm: fix alloc_random_pkey() to make it really random

alloc_random_pkey() was allocating the same pkey every time. Not all pkeys were geting tested. fixed it. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 10 +++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/vm

[PATCH v10 11/24] selftests/vm: pkey register should match shadow pkey

throughout Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c |4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 254b66d..6

[PATCH v10 11/24] selftests/vm: pkey register should match shadow pkey

throughout Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c |4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 254b66d..6054093 100644 --- a/tools

[PATCH v10 10/24] selftests/vm: introduce two arch independent abstraction

open_hugepage_file() <- opens the huge page file get_start_key() <-- provides the first non-reserved key. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 11 +++ tools/testing/selftests/vm/protection_keys.c |6 +++--- 2 f

[PATCH v10 10/24] selftests/vm: introduce two arch independent abstraction

open_hugepage_file() <- opens the huge page file get_start_key() <-- provides the first non-reserved key. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/pkey-helpers.h| 11 +++ tools/testing/selftests/vm/protection_keys.c |6 +++--- 2 files changed, 14 insertions

[PATCH v10 13/24] selftests/vm: powerpc implementation for generic abstraction

Introduce powerpc implementation for the different abstactions. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 109 ++ tools/testing/selftests/vm/protection_keys.c | 40 ++ 2 files changed, 118 insertions(

[PATCH v10 13/24] selftests/vm: powerpc implementation for generic abstraction

Introduce powerpc implementation for the different abstactions. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/pkey-helpers.h| 109 ++ tools/testing/selftests/vm/protection_keys.c | 40 ++ 2 files changed, 118 insertions(+), 31 deletions(-) diff

[PATCH v10 16/24] selftests/vm: fix an assertion in test_pkey_alloc_exhaust()

The maximum number of keys that can be allocated has to take into consideration, that some keys are reserved by the architecture for specific purpose. Hence cannot be allocated. Fix the assertion in test_pkey_alloc_exhaust() Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/t

[PATCH v10 14/24] selftests/vm: clear the bits in shadow reg when a pkey is freed.

When a key is freed, the key is no more effective. Clear the bits corresponding to the pkey in the shadow register. Otherwise it will carry some spurious bits which can trigger false-positive asserts. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selfte

[PATCH v10 16/24] selftests/vm: fix an assertion in test_pkey_alloc_exhaust()

The maximum number of keys that can be allocated has to take into consideration, that some keys are reserved by the architecture for specific purpose. Hence cannot be allocated. Fix the assertion in test_pkey_alloc_exhaust() Signed-off-by: Ram Pai --- tools/testing/selftests/vm/pkey

[PATCH v10 14/24] selftests/vm: clear the bits in shadow reg when a pkey is freed.

When a key is freed, the key is no more effective. Clear the bits corresponding to the pkey in the shadow register. Otherwise it will carry some spurious bits which can trigger false-positive asserts. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c |3 ++- 1

[PATCH v10 18/24] selftests/vm: associate key on a mapped page and detect write violation

detect write-violation on a page to which write-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c | 12 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a

[PATCH v10 18/24] selftests/vm: associate key on a mapped page and detect write violation

detect write-violation on a page to which write-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 12 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/tools/testing/selftests/vm

[PATCH v10 19/24] selftests/vm: detect write violation on a mapped access-denied-key page

detect write-violation on a page to which access-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c | 13 + 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a

[PATCH v10 19/24] selftests/vm: detect write violation on a mapped access-denied-key page

detect write-violation on a page to which access-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 13 + 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/tools/testing/selftests/vm

[PATCH v10 21/24] selftests/vm: sub-page allocator

introduce a new allocator that allocates 4k hardware-pages to back 64k linux-page. This allocator is only applicable on powerpc. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c | 30 ++ 1 files changed, 30 insertions

[PATCH v10 21/24] selftests/vm: sub-page allocator

introduce a new allocator that allocates 4k hardware-pages to back 64k linux-page. This allocator is only applicable on powerpc. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 30 ++ 1 files changed, 30 insertions(+), 0 deletions(-) diff

[PATCH v10 22/24] selftests/vm: Fix deadlock in protection_keys.c

Signed-off-by: Ram Pai <linux...@us.ibm.com> Signed-off-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> tools/testing/selftests/vm/pkey-helpers.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- tools/testing/selftests/vm/pkey-helpers.h |3 ++- 1 files changed,

[PATCH v10 23/24] selftests/powerpc: Add ptrace tests for Protection Key register

From: Thiago Jung Bauermann This test exercises read and write access to the AMR. Signed-off-by: Thiago Jung Bauermann --- tools/testing/selftests/powerpc/include/reg.h |1 + tools/testing/selftests/powerpc/ptrace/Makefile

[PATCH v10 22/24] selftests/vm: Fix deadlock in protection_keys.c

in run_tests_once () at protection_keys.c:1414 #14 0x100561a4 in main () at protection_keys.c:1459 The fix is to refrain from calling fflush() when inside a signal handler. The output may not be as pretty but at least the testcase will be able to move on. Signed-off-by: Ram Pai Signed-off

[PATCH v10 23/24] selftests/powerpc: Add ptrace tests for Protection Key register

From: Thiago Jung Bauermann This test exercises read and write access to the AMR. Signed-off-by: Thiago Jung Bauermann --- tools/testing/selftests/powerpc/include/reg.h |1 + tools/testing/selftests/powerpc/ptrace/Makefile|5 +-

[PATCH v10 24/24] selftests/powerpc: Add core file test for Protection Key register

From: Thiago Jung Bauermann This test verifies that the AMR is being written to a process' core file. Signed-off-by: Thiago Jung Bauermann --- tools/testing/selftests/powerpc/ptrace/Makefile|2 +-

[PATCH v10 24/24] selftests/powerpc: Add core file test for Protection Key register

From: Thiago Jung Bauermann This test verifies that the AMR is being written to a process' core file. Signed-off-by: Thiago Jung Bauermann --- tools/testing/selftests/powerpc/ptrace/Makefile|2 +- tools/testing/selftests/powerpc/ptrace/core-pkey.c | 438 2 files

[PATCH v10 20/24] selftests/vm: testcases must restore pkey-permissions

of the pkey register is not restored to its original state. The test case is responsible for restoring the key register state to its original value. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c |5 + 1 files changed, 5 insertions

[PATCH v10 20/24] selftests/vm: testcases must restore pkey-permissions

of the pkey register is not restored to its original state. The test case is responsible for restoring the key register state to its original value. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c |5 + 1 files changed, 5 insertions(+), 0 deletions(-) diff --git

[PATCH v10 15/24] selftests/vm: powerpc implementation to check support for pkey

pkey subsystem is supported if the hardware and kernel has support. We determine that by checking if allocation of a key succeeds or not. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 22 -- tools/testing/selfte

[PATCH v10 15/24] selftests/vm: powerpc implementation to check support for pkey

pkey subsystem is supported if the hardware and kernel has support. We determine that by checking if allocation of a key succeeds or not. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/pkey-helpers.h| 22 -- tools/testing/selftests/vm/protection_keys.c |9

[PATCH v10 12/24] selftests/vm: generic cleanup

cleanup the code to satisfy coding styles. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c | 81 ++ 1 files changed, 43 insertions(+), 38 deletions(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b

[PATCH v10 17/24] selftests/vm: associate key on a mapped page and detect access violation

detect access-violation on a page to which access-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c | 19 +++ 1 files changed, 19 insertions(+), 0 deletions(-) diff

[PATCH v10 06/24] selftests/vm: fix the wrong assert in pkey_disable_set()

If the flag is 0, no bits will be set. Hence we cant expect the resulting bitmap to have a higher value than what it was earlier. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c |2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff

[PATCH v10 12/24] selftests/vm: generic cleanup

cleanup the code to satisfy coding styles. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 81 ++ 1 files changed, 43 insertions(+), 38 deletions(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm

[PATCH v10 17/24] selftests/vm: associate key on a mapped page and detect access violation

detect access-violation on a page to which access-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 19 +++ 1 files changed, 19 insertions(+), 0 deletions(-) diff --git a/tools/testing/selftests

[PATCH v10 06/24] selftests/vm: fix the wrong assert in pkey_disable_set()

If the flag is 0, no bits will be set. Hence we cant expect the resulting bitmap to have a higher value than what it was earlier. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c |2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/tools/testing

[PATCH v10 00/24] selftests, powerpc, x86 : Memory Protection Keys

architectures(using EC2 ubuntu VM instances). Ram Pai (21): selftests/x86: Move protecton key selftest to arch neutral directory selftests/vm: rename all references to pkru to a generic name selftests/vm: move generic definitions to header file selftests/vm: typecast the pkey register selftests/vm

[PATCH v10 00/24] selftests, powerpc, x86 : Memory Protection Keys

architectures(using EC2 ubuntu VM instances). Ram Pai (21): selftests/x86: Move protecton key selftest to arch neutral directory selftests/vm: rename all references to pkru to a generic name selftests/vm: move generic definitions to header file selftests/vm: typecast the pkey register selftests/vm

[PATCH v10 01/24] selftests/x86: Move protecton key selftest to arch neutral directory

Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/Makefile |1 + tools/testing/selftests/vm/pkey-helpers.h | 223 tools/testing/selftests/vm/protection_keys.c | 1407 + tools/testing/selftests/x86/Makefile

[PATCH v10 01/24] selftests/x86: Move protecton key selftest to arch neutral directory

Signed-off-by: Ram Pai --- tools/testing/selftests/vm/Makefile |1 + tools/testing/selftests/vm/pkey-helpers.h | 223 tools/testing/selftests/vm/protection_keys.c | 1407 + tools/testing/selftests/x86/Makefile |2 +- tools/testing

Re: [PATCH v10 00/27] powerpc, mm: Memory Protection Keys

Sorry please ignore this series. It was a duplication mistake. I aborted the send midway, but a few escaped into the cyber. RP On Mon, Jan 22, 2018 at 10:26:29AM -0800, Ram Pai wrote: > Memory protection keys enable applications to protect its > address space from inadvertent acces

Re: [PATCH v10 00/27] powerpc, mm: Memory Protection Keys

Sorry please ignore this series. It was a duplication mistake. I aborted the send midway, but a few escaped into the cyber. RP On Mon, Jan 22, 2018 at 10:26:29AM -0800, Ram Pai wrote: > Memory protection keys enable applications to protect its > address space from inadvertent acces

[PATCH v10 1/2] Documentation/x86: Move protecton key documentation to arch neutral directory

Since PowerPC and Intel both support memory protection keys, moving the documenation to arch-neutral directory. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- Documentation/vm/protection-keys.txt | 90 + Documentation/x86/protection-keys.txt

[PATCH v10 1/2] Documentation/x86: Move protecton key documentation to arch neutral directory

Since PowerPC and Intel both support memory protection keys, moving the documenation to arch-neutral directory. Signed-off-by: Ram Pai --- Documentation/vm/protection-keys.txt | 90 + Documentation/x86/protection-keys.txt | 90

[PATCH v10 0/2] Documentation, powerpc, x86 : Memory Protection Keys

Memory protection keys enable applications to protect its address space from inadvertent access from itself. This feature is now enabled on powerpc architecture. The patches moves the documentation to arch neutral directory and captures the latest information. Ram Pai (2): Documentation/x86

[PATCH v10 0/2] Documentation, powerpc, x86 : Memory Protection Keys

Memory protection keys enable applications to protect its address space from inadvertent access from itself. This feature is now enabled on powerpc architecture. The patches moves the documentation to arch neutral directory and captures the latest information. Ram Pai (2): Documentation/x86

[PATCH v10 2/2] Documentation/vm: PowerPC specific updates to memory protection keys

Add documentation updates that capture PowerPC specific changes. Signed-off-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- Documentation/vm/protection-keys.txt | 84 + 1 files changed, 6

[PATCH v10 2/2] Documentation/vm: PowerPC specific updates to memory protection keys

Add documentation updates that capture PowerPC specific changes. Signed-off-by: Thiago Jung Bauermann Signed-off-by: Ram Pai --- Documentation/vm/protection-keys.txt | 84 + 1 files changed, 63 insertions(+), 21 deletions(-) diff --git a/Documentation/vm

[PATCH v10 00/27] powerpc, mm: Memory Protection Keys

version v1: Initial version Ram Pai (26): mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled mm, powerpc, x86: introduce an additional vma bit for powerpc pkey powerpc: initial pkey plumbing powerpc: track allocation status of all pkeys powerpc: helper functi

[PATCH v10 00/27] powerpc, mm: Memory Protection Keys

version v1: Initial version Ram Pai (26): mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled mm, powerpc, x86: introduce an additional vma bit for powerpc pkey powerpc: initial pkey plumbing powerpc: track allocation status of all pkeys powerpc: helper functi

[PATCH v10 01/27] mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled

VM_PKEY_BITx are defined only if CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS is enabled. Powerpc also needs these bits. Hence lets define the VM_PKEY_BITx bits for any architecture that enables CONFIG_ARCH_HAS_PKEYS. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- fs/proc/task_mmu.c

[PATCH v10 01/27] mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled

VM_PKEY_BITx are defined only if CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS is enabled. Powerpc also needs these bits. Hence lets define the VM_PKEY_BITx bits for any architecture that enables CONFIG_ARCH_HAS_PKEYS. Signed-off-by: Ram Pai --- fs/proc/task_mmu.c |4 ++-- include/linux/mm.h

[PATCH v10 02/27] mm, powerpc, x86: introduce an additional vma bit for powerpc pkey

Currently only 4bits are allocated in the vma flags to hold 16 keys. This is sufficient for x86. PowerPC supports 32 keys, which needs 5bits. This patch allocates an additional bit. Acked-by: Balbir Singh <bsinghar...@gmail.com> Signed-off-by: Ram Pai <linux...@us.ibm.com>

[PATCH v10 02/27] mm, powerpc, x86: introduce an additional vma bit for powerpc pkey

Currently only 4bits are allocated in the vma flags to hold 16 keys. This is sufficient for x86. PowerPC supports 32 keys, which needs 5bits. This patch allocates an additional bit. Acked-by: Balbir Singh Signed-off-by: Ram Pai --- fs/proc/task_mmu.c |1 + include/linux/mm.h |3

Re: [PATCH v10 27/27] mm: display pkey in smaps if arch_pkeys_enabled() is true

On Fri, Jan 19, 2018 at 10:09:41AM -0600, Eric W. Biederman wrote: > Ram Pai <linux...@us.ibm.com> writes: > > > Currently the architecture specific code is expected to > > display the protection keys in smap for a given vma. > > This can lead to redundant

Re: [PATCH v10 27/27] mm: display pkey in smaps if arch_pkeys_enabled() is true

On Fri, Jan 19, 2018 at 10:09:41AM -0600, Eric W. Biederman wrote: > Ram Pai writes: > > > Currently the architecture specific code is expected to > > display the protection keys in smap for a given vma. > > This can lead to redundant code and possibly to diverg

[PATCH v10 10/27] powerpc: store and restore the pkey state across context switches

Store and restore the AMR, IAMR and UAMOR register state of the task before scheduling out and after scheduling in, respectively. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/mmu_context.h |3 ++ arch/powerpc/include/asm/pkeys.h |4 ++ arch/p

[PATCH v10 10/27] powerpc: store and restore the pkey state across context switches

Store and restore the AMR, IAMR and UAMOR register state of the task before scheduling out and after scheduling in, respectively. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/mmu_context.h |3 ++ arch/powerpc/include/asm/pkeys.h |4 ++ arch/powerpc/include/asm/processor.h

[PATCH v10 11/27] powerpc: introduce execute-only pkey

This patch provides the implementation of execute-only pkey. The architecture-independent layer expects the arch-dependent layer, to support the ability to create and enable a special key which has execute-only permission. Acked-by: Balbir Singh <bsinghar...@gmail.com> Signed-off-by: R

[PATCH v10 11/27] powerpc: introduce execute-only pkey

This patch provides the implementation of execute-only pkey. The architecture-independent layer expects the arch-dependent layer, to support the ability to create and enable a special key which has execute-only permission. Acked-by: Balbir Singh Signed-off-by: Ram Pai --- arch/powerpc/include

[PATCH v10 12/27] powerpc: ability to associate pkey to a vma

arch-independent code expects the arch to map a pkey into the vma's protection bit setting. The patch provides that ability. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/mman.h |7 ++- arch/powerpc/include/asm/pkeys.h | 11 +++ arch/powe

[PATCH v10 13/27] powerpc: implementation for arch_override_mprotect_pkey()

arch independent code calls arch_override_mprotect_pkey() to return a pkey that best matches the requested protection. This patch provides the implementation. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/mmu_context.h |5 arch/powerpc/include/asm/p

[PATCH v10 13/27] powerpc: implementation for arch_override_mprotect_pkey()

arch independent code calls arch_override_mprotect_pkey() to return a pkey that best matches the requested protection. This patch provides the implementation. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/mmu_context.h |5 arch/powerpc/include/asm/pkeys.h | 21

[PATCH v10 12/27] powerpc: ability to associate pkey to a vma

arch-independent code expects the arch to map a pkey into the vma's protection bit setting. The patch provides that ability. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/mman.h |7 ++- arch/powerpc/include/asm/pkeys.h | 11 +++ arch/powerpc/mm/pkeys.c

[PATCH v10 01/27] mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled

VM_PKEY_BITx are defined only if CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS is enabled. Powerpc also needs these bits. Hence lets define the VM_PKEY_BITx bits for any architecture that enables CONFIG_ARCH_HAS_PKEYS. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- fs/proc/task_mmu.c

[PATCH v10 01/27] mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled

VM_PKEY_BITx are defined only if CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS is enabled. Powerpc also needs these bits. Hence lets define the VM_PKEY_BITx bits for any architecture that enables CONFIG_ARCH_HAS_PKEYS. Signed-off-by: Ram Pai --- fs/proc/task_mmu.c |4 ++-- include/linux/mm.h

[PATCH v10 14/27] powerpc: map vma key-protection bits to pte key bits.

. BUT, on 4k kernel, bit 3, and 4 could not be freed up. remember? Hence we have to be satisfied with 5, 6 and 7. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/book3s/64/pgtable.h | 25 - arch/powerpc/include/asm/mman.h

[PATCH v10 15/27] powerpc: Program HPTE key protection bits

Map the PTE protection key bits to the HPTE key protection bits, while creating HPTE entries. Acked-by: Balbir Singh <bsinghar...@gmail.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/book3s/64/mmu-hash.h |5 + arch/powerpc/include/asm/m

[PATCH v10 14/27] powerpc: map vma key-protection bits to pte key bits.

. BUT, on 4k kernel, bit 3, and 4 could not be freed up. remember? Hence we have to be satisfied with 5, 6 and 7. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/book3s/64/pgtable.h | 25 - arch/powerpc/include/asm/mman.h |6 ++ arch/powerpc/include/asm

[PATCH v10 15/27] powerpc: Program HPTE key protection bits

Map the PTE protection key bits to the HPTE key protection bits, while creating HPTE entries. Acked-by: Balbir Singh Signed-off-by: Ram Pai --- arch/powerpc/include/asm/book3s/64/mmu-hash.h |5 + arch/powerpc/include/asm/mmu_context.h|6 ++ arch/powerpc/include/asm

[PATCH v10 16/27] powerpc: helper to validate key-access permissions of a pte

helper function that checks if the read/write/execute is allowed on the pte. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/book3s/64/pgtable.h |4 +++ arch/powerpc/include/asm/pkeys.h |9 arch/powerpc/mm/pkeys.c

[PATCH v10 16/27] powerpc: helper to validate key-access permissions of a pte

helper function that checks if the read/write/execute is allowed on the pte. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/book3s/64/pgtable.h |4 +++ arch/powerpc/include/asm/pkeys.h |9 arch/powerpc/mm/pkeys.c | 28

[PATCH v10 21/27] powerpc: Deliver SEGV signal on pkey violation

The value of the pkey, whose protection got violated, is made available in si_pkey field of the siginfo structure. Signed-off-by: Ram Pai <linux...@us.ibm.com> Signed-off-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> --- arch/powerpc/include/asm/bug.h |1 + arch/po

[PATCH v10 21/27] powerpc: Deliver SEGV signal on pkey violation

The value of the pkey, whose protection got violated, is made available in si_pkey field of the siginfo structure. Signed-off-by: Ram Pai Signed-off-by: Thiago Jung Bauermann --- arch/powerpc/include/asm/bug.h |1 + arch/powerpc/kernel/traps.c| 12 +++- arch/powerpc/mm

[PATCH v10 23/27] powerpc: Enable pkey subsystem

support for pkeys. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/cputable.h | 16 ++--- arch/powerpc/include/asm/pkeys.h|3 ++ arch/powerpc/mm/pkeys.c | 61 +- 3 files changed, 65 insertions(+), 15 del

[PATCH v10 23/27] powerpc: Enable pkey subsystem

support for pkeys. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/cputable.h | 16 ++--- arch/powerpc/include/asm/pkeys.h|3 ++ arch/powerpc/mm/pkeys.c | 61 +- 3 files changed, 65 insertions(+), 15 deletions(-) diff --git a/arch

[PATCH v10 22/27] powerpc/ptrace: Add memory protection key regset

From: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> The AMR/IAMR/UAMOR are part of the program context. Allow it to be accessed via ptrace and through core files. Signed-off-by: Ram Pai <linux...@us.ibm.com> Signed-off-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm

[PATCH v10 17/27] powerpc: check key protection for user page access

Make sure that the kernel does not access user pages without checking their key-protection. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/book3s/64/pgtable.h | 19 +++ 1 files changed, 19 insertions(+), 0 deletions(-) diff --git a/arch/p

[PATCH v10 17/27] powerpc: check key protection for user page access

Make sure that the kernel does not access user pages without checking their key-protection. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/book3s/64/pgtable.h | 19 +++ 1 files changed, 19 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64

[PATCH v10 22/27] powerpc/ptrace: Add memory protection key regset

From: Thiago Jung Bauermann The AMR/IAMR/UAMOR are part of the program context. Allow it to be accessed via ptrace and through core files. Signed-off-by: Ram Pai Signed-off-by: Thiago Jung Bauermann --- arch/powerpc/include/asm/pkeys.h|5 +++ arch/powerpc/include/uapi/asm/elf.h

[PATCH v10 26/27] mm, x86 : introduce arch_pkeys_enabled()

Arch neutral code needs to know if the architecture supports protection keys to display protection key in smaps. Hence introducing arch_pkeys_enabled(). This patch also provides x86 implementation for arch_pkeys_enabled(). Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/x86/inclu

[PATCH v10 26/27] mm, x86 : introduce arch_pkeys_enabled()

Arch neutral code needs to know if the architecture supports protection keys to display protection key in smaps. Hence introducing arch_pkeys_enabled(). This patch also provides x86 implementation for arch_pkeys_enabled(). Signed-off-by: Ram Pai --- arch/x86/include/asm/pkeys.h |1

[PATCH v10 25/27] powerpc: sys_pkey_mprotect() system call

Patch provides the ability for a process to associate a pkey with a address range. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/systbl.h |1 + arch/powerpc/include/asm/unistd.h |4 +--- arch/powerpc/include/uapi/asm/unistd.h |1 + 3

[PATCH v10 25/27] powerpc: sys_pkey_mprotect() system call

Patch provides the ability for a process to associate a pkey with a address range. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/systbl.h |1 + arch/powerpc/include/asm/unistd.h |4 +--- arch/powerpc/include/uapi/asm/unistd.h |1 + 3 files changed, 3 insertions(+), 3

[PATCH v10 24/27] powerpc: sys_pkey_alloc() and sys_pkey_free() system calls

Finally this patch provides the ability for a process to allocate and free a protection key. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/systbl.h |2 ++ arch/powerpc/include/asm/unistd.h |4 +--- arch/powerpc/include/uapi/asm/unistd.h |2

[PATCH v10 24/27] powerpc: sys_pkey_alloc() and sys_pkey_free() system calls

Finally this patch provides the ability for a process to allocate and free a protection key. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/systbl.h |2 ++ arch/powerpc/include/asm/unistd.h |4 +--- arch/powerpc/include/uapi/asm/unistd.h |2 ++ 3 files changed, 5

[PATCH v10 27/27] mm: display pkey in smaps if arch_pkeys_enabled() is true

if the architecture support pkeys. x86 arch_show_smap() function is not needed anymore. Delete it. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/x86/kernel/setup.c |8 fs/proc/task_mmu.c | 11 ++- 2 files changed, 6 insertions(+), 13 deletions(-) diff --git a/ar

[PATCH v10 27/27] mm: display pkey in smaps if arch_pkeys_enabled() is true

if the architecture support pkeys. x86 arch_show_smap() function is not needed anymore. Delete it. Signed-off-by: Ram Pai --- arch/x86/kernel/setup.c |8 fs/proc/task_mmu.c | 11 ++- 2 files changed, 6 insertions(+), 13 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86

[PATCH v10 06/27] powerpc: helper functions to initialize AMR, IAMR and UAMOR registers

Introduce helper functions that can initialize the bits in the AMR, IAMR and UAMOR register; the bits that correspond to the given pkey. Reviewed-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/mm/pk

[PATCH v10 19/27] powerpc: Handle exceptions caused by pkey violation

. Signed-off-by: Ram Pai <linux...@us.ibm.com> Signed-off-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> --- arch/powerpc/include/asm/reg.h |1 - arch/powerpc/kernel/exceptions-64s.S |2 +- arch/powerpc/mm/fault.c | 22 ++ 3 f

[PATCH v10 20/27] powerpc: introduce get_mm_addr_key() helper

get_mm_addr_key() helper returns the pkey associated with an address corresponding to a given mm_struct. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/mmu.h |9 + arch/powerpc/mm/hash_utils_64.c | 24 2 files chang

[PATCH v10 06/27] powerpc: helper functions to initialize AMR, IAMR and UAMOR registers

Introduce helper functions that can initialize the bits in the AMR, IAMR and UAMOR register; the bits that correspond to the given pkey. Reviewed-by: Thiago Jung Bauermann Signed-off-by: Ram Pai --- arch/powerpc/mm/pkeys.c | 47 +++ 1 files

[PATCH v10 19/27] powerpc: Handle exceptions caused by pkey violation

. Signed-off-by: Ram Pai Signed-off-by: Thiago Jung Bauermann --- arch/powerpc/include/asm/reg.h |1 - arch/powerpc/kernel/exceptions-64s.S |2 +- arch/powerpc/mm/fault.c | 22 ++ 3 files changed, 23 insertions(+), 2 deletions(-) diff --git a/arch

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