[PATCH v12 15/22] 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. cc: Dave Hansen <dave.han...@intel.com> cc: Florian Weimer <fwei...@redhat.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/te

[PATCH v12 16/22] selftests/vm: fix an assertion in test_pkey_alloc_exhaust()

<fwei...@redhat.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 14 ++ tools/testing/selftests/vm/protection_keys.c |9 - 2 files changed, 18 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests

[PATCH v12 17/22] 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. cc: Dave Hansen <dave.han...@intel.com> cc: Florian Weimer <fwei...@redhat.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protec

[PATCH v12 19/22] 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. cc: Dave Hansen <dave.han...@intel.com> cc: Florian Weimer <fwei...@redhat.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/protec

[PATCH v12 01/22] selftests/x86: Move protecton key selftest to arch neutral directory

cc: Dave Hansen <dave.han...@intel.com> cc: Florian Weimer <fwei...@redhat.com> 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/protect

[PATCH v12 05/22] selftests/vm: generic function to handle shadow key register

helper functions to handler shadow pkey register cc: Dave Hansen <dave.han...@intel.com> cc: Florian Weimer <fwei...@redhat.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 27 tools/testing/selftests/vm

[PATCH v12 02/22] 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 cc: Dave Hansen <dave.han...@intel.com> cc: Florian Weimer <fwei...@redhat.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 85 +--

[PATCH v12 04/22] selftests/vm: typecast the pkey register

This is in preparation to accomadate a differing size register across architectures. cc: Dave Hansen <dave.han...@intel.com> cc: Florian Weimer <fwei...@redhat.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- tools/testing/selftests/vm/pkey-helpers.h| 27 +--

[PATCH v10 04/27] powerpc: track allocation status of all pkeys

pkeys. This patch keeps track of reserved keys, allocated keys and keys that are currently free. Also it adds skeletal functions and macros, that the architecture-independent code expects to be available. Reviewed-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> Signed-off-by: R

[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 03/27] powerpc: initial pkey plumbing

Basic plumbing to initialize the pkey system. Nothing is enabled yet. A later patch will enable it once all the infrastructure is in place. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/Kconfig | 15 + arch/powerpc/include/asm/mmu_con

[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 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 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 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 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 07/27] powerpc: cleanup AMR, IAMR when a key is allocated or freed

uer...@linux.vnet.ibm.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/pkeys.h | 12 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/pkeys.h b/arch/powerpc/include/asm/pkeys.h index 1e8cef2..9964b46 100644 --- a/

[PATCH v10 18/27] powerpc: implementation for arch_vma_access_permitted()

This patch provides the implementation for arch_vma_access_permitted(). Returns true if the requested access is allowed by pkey associated with the vma. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/mmu_context.h |5 +++- arch/powerpc/mm/p

[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 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 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 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 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 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 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 09/27] powerpc: ability to create execute-disabled pkeys

powerpc has hardware support to disable execute on a pkey. This patch enables the ability to create execute-disabled keys. Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/uapi/asm/mman.h |6 ++ arch/powerpc/mm/pkeys.c | 16 2

[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 05/27] powerpc: helper function to read,write AMR,IAMR,UAMOR registers

viewed-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/mm/pkeys.c | 36 1 files changed, 36 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/mm/pkeys.c b/arch/powerp

[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 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 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 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 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 08/27] powerpc: implementation for arch_set_user_pkey_access()

ed-off-by: Ram Pai <linux...@us.ibm.com> --- arch/powerpc/include/asm/pkeys.h |6 - arch/powerpc/mm/pkeys.c | 40 ++ 2 files changed, 45 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/include/asm/pkeys.h b/arch/powerpc/include

[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 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 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 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 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 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 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 v13 0/3] mm, x86, powerpc: Enhancements to Memory Protection Keys.

: (1) used one additional bit from VM_HIGH_ARCH_* to support 32 keys. - Suggestion by Dave Hansen. (2) powerpc specific changes to support memory keys. Ram Pai (3): mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled mm

[PATCH v13 3/3] mm, x86, powerpc: display pkey in smaps only if arch supports pkeys

g.org> cc: Andrew Morton <a...@linux-foundation.org> Reviewed-by: Dave Hansen <dave.han...@intel.com> Signed-off-by: Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> (fixed compilation errors for x86 configs) Acked-by: Michal Hocko <mho...@suse.com> Reviewed-by: Ingo Molnar &

[PATCH v13 2/3] mm, powerpc, x86: introduce an additional vma bit for powerpc pkey

errenschmidt <b...@kernel.crashing.org> cc: Andrew Morton <a...@linux-foundation.org> Reviewed-by: Ingo Molnar <mi...@kernel.org> Acked-by: Balbir Singh <bsinghar...@gmail.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> --- fs/proc/task_mmu.c |1 + include

[PATCH v13 1/3] mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled

idt <b...@kernel.crashing.org> cc: Andrew Morton <a...@linux-foundation.org> Reviewed-by: Dave Hansen <dave.han...@intel.com> Signed-off-by: Ram Pai <linux...@us.ibm.com> Reviewed-by: Ingo Molnar <mi...@kernel.org> Reviewed-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com

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