Currently there are only 4bits in the vma flags to support 16 keys
on x86. powerpc supports 32 keys, which needs 5bits. This patch
introduces an addition bit in the vma flags.
Signed-off-by: Ram Pai
---
fs/proc/task_mmu.c |6 +-
include/linux/mm.h | 18 +-
2 files
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
x86 does not support disabling execute permissions on a pkey.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/x86/kernel/fpu/xstate.c |3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index c
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
x86 does not support disabling execute permissions on a pkey.
Signed-off-by: Ram Pai
---
arch/x86/kernel/fpu/xstate.c |3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index c24ac1e..d582631 100644
--- a/arch
functions and macros, that the
architecture-independent code expects to be available.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/Kconfig | 16 +
arch/powerpc/include/asm/book3s/64/mmu.h |9 +++
arch/powerpc/include/asm/pkeys.h
functions and macros, that the
architecture-independent code expects to be available.
Signed-off-by: Ram Pai
---
arch/powerpc/Kconfig | 16 +
arch/powerpc/include/asm/book3s/64/mmu.h |9 +++
arch/powerpc/include/asm/pkeys.h | 106
Store and restore the AMR, IAMR and UMOR 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/processor.h |5 +
arch/powerpc/kernel/process.c| 18 +++
Store and restore the AMR, IAMR and UMOR register state of the task
before scheduling out and after scheduling in, respectively.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/processor.h |5 +
arch/powerpc/kernel/process.c| 18 ++
2 files changed, 23
This patch provides the detailed implementation for
a user to allocate a key and enable it in the hardware.
It provides the plumbing, but it cannot be used yet
till the system call is implemented. The next patch
will do so.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/p
This patch provides the detailed implementation for
a user to allocate a key and enable it in the hardware.
It provides the plumbing, but it cannot be used yet
till the system call is implemented. The next patch
will do so.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/pkeys.h
-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 20 +++-
arch/powerpc/include/asm/mman.h |8
arch/powerpc/include/asm/pkeys.h |9 +
3 files changed, 36 insertions(+), 1 deletions(-)
diff
-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 20 +++-
arch/powerpc/include/asm/mman.h |8
arch/powerpc/include/asm/pkeys.h |9 +
3 files changed, 36 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include
This patch provides the implementation of execute-only pkey.
The architecture-independent expects the ability to create
and manage a special key which has execute-only permission.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/book3s/64/mmu.h |1 +
arch/p
This patch provides the implementation of execute-only pkey.
The architecture-independent expects the ability to create
and manage a special key which has execute-only permission.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/mmu.h |1 +
arch/powerpc/include/asm/pkeys.h
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
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 |8 +++-
arch/powerpc/include/asm/pkeys.h | 14 --
2
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
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 |8 +++-
arch/powerpc/include/asm/pkeys.h | 14 --
2 files changed, 19 insertions
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/pkeys.h | 10 ++-
arch/powerpc/mm/p
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/pkeys.h | 10 ++-
arch/powerpc/mm/pkeys.c | 47
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 |2 +
arch/powerpc/include/asm/pkeys.h |9 +++
arch/powerpc/mm/pkeys.c
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 |2 +
arch/powerpc/include/asm/pkeys.h |9 +++
arch/powerpc/mm/pkeys.c | 31
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 | 14 ++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/i
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 | 14 ++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h
The value of the AMR register at the time of exception
is made available in gp_regs[PT_AMR] of the siginfo.
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>
---
arch/powerpc/i
get_pte_pkey() helper returns the pkey associated with
a address corresponding to a given mm_struct.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/book3s/64/mmu-hash.h |5
arch/powerpc/mm/hash_utils_64.c | 28 +
2
get_pte_pkey() helper returns the pkey associated with
a address corresponding to a given mm_struct.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/mmu-hash.h |5
arch/powerpc/mm/hash_utils_64.c | 28 +
2 files changed, 33
The value of the AMR register at the time of exception
is made available in gp_regs[PT_AMR] of the siginfo.
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
---
arch/powerpc/include/uapi/asm/ptrace.h
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
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
---
arch/powerpc/include/asm/mmu_context.h |5
arch/powerpc/mm/pkeys.c| 40
checkpatch.pl happy
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
tools/testing/selftests/vm/pkey-helpers.h| 230 +--
tools/testing/selftests/vm/protection_keys.c | 567 +++---
2 files changed, 518 insertions(+), 279 deletions(-)
diff --git a/tools/t
checkpatch.pl happy
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/pkey-helpers.h| 230 +--
tools/testing/selftests/vm/protection_keys.c | 567 +++---
2 files changed, 518 insertions(+), 279 deletions(-)
diff --git a/tools/testing/selftests/vm/pkey-helpers.h
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
tools/testing/selftests/vm/Makefile |1 +
tools/testing/selftests/vm/pkey-helpers.h | 219
tools/testing/selftests/vm/protection_keys.c | 1395 +
tools/testing/selftests/x86/Makefile
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/Makefile |1 +
tools/testing/selftests/vm/pkey-helpers.h | 219
tools/testing/selftests/vm/protection_keys.c | 1395 +
tools/testing/selftests/x86/Makefile |2 +-
tools/testing
Display the pkey number associated with the vma in smaps of a task.
The key will be seen as below:
ProtectionKey: 0
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/kernel/setup_64.c |8
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/
Capture the protection key that got violated in paca.
This value will be used by used to inform the signal
handler.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/paca.h |1 +
arch/powerpc/kernel/asm-offsets.c |1 +
arch/powerpc/mm/fault.c
Display the pkey number associated with the vma in smaps of a task.
The key will be seen as below:
ProtectionKey: 0
Signed-off-by: Ram Pai
---
arch/powerpc/kernel/setup_64.c |8
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/setup_64.c b/arch
Capture the protection key that got violated in paca.
This value will be used by used to inform the signal
handler.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/paca.h |1 +
arch/powerpc/kernel/asm-offsets.c |1 +
arch/powerpc/mm/fault.c |3 +++
3 files changed, 5
in such a case.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/reg.h |2 +-
arch/powerpc/mm/fault.c| 21 +
2 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index b
Add documentation updates that capture PowerPC specific changes.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
Documentation/vm/protection-keys.txt | 85 ++
1 files changed, 65 insertions(+), 20 deletions(-)
diff --git a/Documentation/vm/protection-ke
in such a case.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/reg.h |2 +-
arch/powerpc/mm/fault.c| 21 +
2 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index ba110dd..6e2a860 100644
Add documentation updates that capture PowerPC specific changes.
Signed-off-by: Ram Pai
---
Documentation/vm/protection-keys.txt | 85 ++
1 files changed, 65 insertions(+), 20 deletions(-)
diff --git a/Documentation/vm/protection-keys.txt
b/Documentation/vm
Replace the magic number used to check for DSI exception
with a meaningful value.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/reg.h |7 ++-
arch/powerpc/kernel/exceptions-64s.S |2 +-
2 files changed, 7 insertions(+), 2 deletions(-)
diff
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 | 85 +
Documentation/x86/protection-keys.txt
Replace the magic number used to check for DSI exception
with a meaningful value.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/reg.h |7 ++-
arch/powerpc/kernel/exceptions-64s.S |2 +-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include
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 | 85 +
Documentation/x86/protection-keys.txt | 85
capture AMR register contents, and save it in paca
whenever a pkey violation is detected.
This value will be needed to deliver pkey-violation
signal to the task.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/paca.h |3 +++
arch/powerpc/kernel/asm-off
capture AMR register contents, and save it in paca
whenever a pkey violation is detected.
This value will be needed to deliver pkey-violation
signal to the task.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/paca.h |3 +++
arch/powerpc/kernel/asm-offsets.c |5 +
arch
this. Hence the next patch will add
ability in x86 to return error if PKEY_DISABLE_EXECUTE is
specified.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
include/uapi/asm-generic/mman-common.h |4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/include/uapi/asm-generi
this. Hence the next patch will add
ability in x86 to return error if PKEY_DISABLE_EXECUTE is
specified.
Signed-off-by: Ram Pai
---
include/uapi/asm-generic/mman-common.h |4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/include/uapi/asm-generic/mman-common.h
b/include
Map the PTE protection key bits to the HPTE key protection bits,
while creating HPTE entries.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/book3s/64/mmu-hash.h |5 +
arch/powerpc/include/asm/pkeys.h |9 +
arch/powe
Map the PTE protection key bits to the HPTE key protection bits,
while creating HPTE entries.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/mmu-hash.h |5 +
arch/powerpc/include/asm/pkeys.h |9 +
arch/powerpc/mm/hash_utils_64.c
Introduce pte_get_hash_gslot()() which returns the slot number of the
HPTE in the global hash table.
This function will come in handy as we work towards re-arranging the
PTE bits in the later patches.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/book3s/64/
Introduce pte_get_hash_gslot()() which returns the slot number of the
HPTE in the global hash table.
This function will come in handy as we work towards re-arranging the
PTE bits in the later patches.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/hash.h |3 +++
arch/powerpc
The H_PAGE_F_SECOND,H_PAGE_F_GIX are not in the 64K main-PTE.
capture these changes in the dump pte report.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/mm/dump_linuxpagetables.c |3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/powe
replace redundant code in __hash_page_huge() with helper
functions pte_get_hash_gslot() and pte_set_hash_slot()
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/mm/hugetlbpage-hash64.c | 24
1 files changed, 4 insertions(+), 20 deletions(-)
diff
The H_PAGE_F_SECOND,H_PAGE_F_GIX are not in the 64K main-PTE.
capture these changes in the dump pte report.
Signed-off-by: Ram Pai
---
arch/powerpc/mm/dump_linuxpagetables.c |3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/mm/dump_linuxpagetables.c
b/arch
replace redundant code in __hash_page_huge() with helper
functions pte_get_hash_gslot() and pte_set_hash_slot()
Signed-off-by: Ram Pai
---
arch/powerpc/mm/hugetlbpage-hash64.c | 24
1 files changed, 4 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/mm
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 fo
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 fo
On Tue, Jun 27, 2017 at 08:54:07PM +0530, Aneesh Kumar K.V wrote:
>
>
> On Tuesday 27 June 2017 03:41 PM, Ram Pai wrote:
> >Pass the correct protection key value to the hash functions on
> >page fault.
> >
> >Signed-off-by: Ram Pai <linux...@us.ibm.com&g
On Tue, Jun 27, 2017 at 08:54:07PM +0530, Aneesh Kumar K.V wrote:
>
>
> On Tuesday 27 June 2017 03:41 PM, Ram Pai wrote:
> >Pass the correct protection key value to the hash functions on
> >page fault.
> >
> >Signed-off-by: Ram Pai
> >---
>
Currently there are only 4bits in the vma flags to support 16 keys
on x86. powerpc supports 32 keys, which needs 5bits. This patch
introduces an addition bit in the vma flags.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
fs/proc/task_mmu.c | 6 +-
include/linux/mm.
Currently there are only 4bits in the vma flags to support 16 keys
on x86. powerpc supports 32 keys, which needs 5bits. This patch
introduces an addition bit in the vma flags.
Signed-off-by: Ram Pai
---
fs/proc/task_mmu.c | 6 +-
include/linux/mm.h | 18 +-
2 files changed
This system call, associates the pkey with vma corresponding to
the given address range.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/mman.h| 8 ++-
arch/powerpc/include/asm/pkeys.h | 17 ++-
arch/powerpc/include/asm/systbl.h | 1 +
Prepare the hash functions to be aware of protection keys.
This key will later be used to program the HPTE.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/book3s/64/hash.h | 2 +-
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 14 ++-
arch/powe
This system call, associates the pkey with vma corresponding to
the given address range.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/mman.h| 8 ++-
arch/powerpc/include/asm/pkeys.h | 17 ++-
arch/powerpc/include/asm/systbl.h | 1 +
arch/powerpc/include/asm
Prepare the hash functions to be aware of protection keys.
This key will later be used to program the HPTE.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/hash.h | 2 +-
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 14 ++-
arch/powerpc/mm/hash64_4k.c
a key can be initialize to disable execute.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/Kconfig | 15
arch/powerpc/include/asm/book3s/64/mmu.h | 10 +++
arch/powerpc/include/asm/book3s/64/pgtable.h | 62 ++
arch/powerpc/inclu
a key can be initialize to disable execute.
Signed-off-by: Ram Pai
---
arch/powerpc/Kconfig | 15
arch/powerpc/include/asm/book3s/64/mmu.h | 10 +++
arch/powerpc/include/asm/book3s/64/pgtable.h | 62 ++
arch/powerpc/include/asm/pkeys.h | 124
Pass the correct protection key value to the hash functions on
page fault.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/pkeys.h | 11 +++
arch/powerpc/mm/hash_utils_64.c | 4
arch/powerpc/mm/mem.c| 6 ++
3 files changed, 21 inse
Pass the correct protection key value to the hash functions on
page fault.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/pkeys.h | 11 +++
arch/powerpc/mm/hash_utils_64.c | 4
arch/powerpc/mm/mem.c| 6 ++
3 files changed, 21 insertions(+)
diff --git a/arch
this. Hence the next patch will add
ability in x86 to return error if PKEY_DISABLE_EXECUTE is
specified.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
include/uapi/asm-generic/mman-common.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/uapi/asm-generi
this. Hence the next patch will add
ability in x86 to return error if PKEY_DISABLE_EXECUTE is
specified.
Signed-off-by: Ram Pai
---
include/uapi/asm-generic/mman-common.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/uapi/asm-generic/mman-common.h
b/include/uapi
The value of the AMR register at the time of exception
is made available in gp_regs[PT_AMR] of the siginfo.
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>
---
arch/powerpc/i
Map the PTE protection key bits to the HPTE key protection bits,
while creating HPTE entries.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
Makefile | 2 +-
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 5 +
arch/powerpc/include/asm/p
The value of the AMR register at the time of exception
is made available in gp_regs[PT_AMR] of the siginfo.
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
---
arch/powerpc/include/asm/paca.h| 1
Map the PTE protection key bits to the HPTE key protection bits,
while creating HPTE entries.
Signed-off-by: Ram Pai
---
Makefile | 2 +-
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 5 +
arch/powerpc/include/asm/pkeys.h | 9
Replace the magic number used to check for DSI exception
with a meaningful value.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/reg.h | 7 ++-
arch/powerpc/kernel/exceptions-64s.S | 2 +-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git
Replace the magic number used to check for DSI exception
with a meaningful value.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/reg.h | 7 ++-
arch/powerpc/kernel/exceptions-64s.S | 2 +-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm
Store and restore the AMR, IAMR and UMOR 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/processor.h | 5 +
arch/powerpc/kernel/process.c| 18 ++
2
Store and restore the AMR, IAMR and UMOR register state of the task
before scheduling out and after scheduling in, respectively.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/processor.h | 5 +
arch/powerpc/kernel/process.c| 18 ++
2 files changed, 23
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 | 85 +++
Documentation/x86/protection-keys.tx
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 | 85 +++
Documentation/x86/protection-keys.txt | 85
Add documentation updates that capture PowerPC specific changes.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
Documentation/vm/protection-keys.txt | 89
1 file changed, 69 insertions(+), 20 deletions(-)
diff --git a/Documentation/vm/protection-ke
Add documentation updates that capture PowerPC specific changes.
Signed-off-by: Ram Pai
---
Documentation/vm/protection-keys.txt | 89
1 file changed, 69 insertions(+), 20 deletions(-)
diff --git a/Documentation/vm/protection-keys.txt
b/Documentation/vm
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
tools/testing/selftests/vm/Makefile |1 +
tools/testing/selftests/vm/pkey-helpers.h | 219
tools/testing/selftests/vm/protection_keys.c | 1395 +
tools/testing/selftests/x86/Makefile
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/Makefile |1 +
tools/testing/selftests/vm/pkey-helpers.h | 219
tools/testing/selftests/vm/protection_keys.c | 1395 +
tools/testing/selftests/x86/Makefile |2 +-
tools/testing
checkpatch.pl happy
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
tools/testing/selftests/vm/pkey-helpers.h| 230 +--
tools/testing/selftests/vm/protection_keys.c | 567 ---
2 files changed, 518 insertions(+), 279 deletions(-)
diff --git a/tools/t
checkpatch.pl happy
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/pkey-helpers.h| 230 +--
tools/testing/selftests/vm/protection_keys.c | 567 ---
2 files changed, 518 insertions(+), 279 deletions(-)
diff --git a/tools/testing/selftests/vm/pkey-helpers.h
Display the pkey number associated with the vma in smaps of a task.
The key will be seen as below:
VmFlags: rd wr mr mw me dw ac key=0
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
Documentation/filesystems/proc.txt | 3 ++-
fs/proc/task_mmu.c | 22 +++
Display the pkey number associated with the vma in smaps of a task.
The key will be seen as below:
VmFlags: rd wr mr mw me dw ac key=0
Signed-off-by: Ram Pai
---
Documentation/filesystems/proc.txt | 3 ++-
fs/proc/task_mmu.c | 22 +++---
2 files changed, 13
Handle Data and Instruction exceptions caused by memory
protection-key.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/powerpc/include/asm/mmu_context.h | 12 ++
arch/powerpc/include/asm/reg.h | 2 +-
arch/powerpc/mm/fault.c| 20 +
arch/powe
x86 does not support disabling execute permissions on a pkey.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
---
arch/x86/kernel/fpu/xstate.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index c24ac1e..d582631 100644
---
Handle Data and Instruction exceptions caused by memory
protection-key.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/mmu_context.h | 12 ++
arch/powerpc/include/asm/reg.h | 2 +-
arch/powerpc/mm/fault.c| 20 +
arch/powerpc/mm/pkeys.c
x86 does not support disabling execute permissions on a pkey.
Signed-off-by: Ram Pai
---
arch/x86/kernel/fpu/xstate.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index c24ac1e..d582631 100644
--- a/arch/x86/kernel/fpu
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
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
On Sun, Jun 25, 2017 at 11:02:58PM -0500, Benjamin Herrenschmidt wrote:
> On Mon, 2017-06-26 at 09:03 +1000, Balbir Singh wrote:
> > On Wed, 2017-06-21 at 18:39 -0700, Ram Pai wrote:
> > > Introduce set_hidx_slot() which sets the (H_PAGE_F_SECOND|H_PAGE_F_GIX)
> > >
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