hours ago
>
> >> drivers/md/dm-inplace-compress.c:1759:5-8: WARNING: Unsigned expression
> >> compared with zero: ret < 0
>
> git remote add linux-review https://github.com/0day-ci/linux
> git remote update linux-review
> git checkout e7924efaaba5efdcd
not receive any comments.
Ram Pai (1):
From: Shaohua Li
.../device-mapper/dm-inplace-compress.txt | 155 ++
drivers/md/Kconfig |6 +
drivers/md/Makefile|2 +
drivers/md/dm-inplace-compress.c
pressed target. In such SSD, we don't have the 1:1
size issue.
So even if SSD FTL cannot map non-contiguous disk sectors to
contiguous nand, the compression target can still function well.
Signed-off-by: Shaohua Li
Signed-off-by: Ram Pai
---
.../device-mapper/dm-inpl
On Thu, Oct 01, 2020 at 11:17:15AM -0700, Ralph Campbell wrote:
> ZONE_DEVICE struct pages have an extra reference count that complicates the
> code for put_page() and several places in the kernel that need to check the
> reference count to see that a page is not being used (gup, compaction,
> migr
ock, so prefix the original function with __
> and remove the locking in it, and introduce a wrapper which call that
> function with the lock held.
>
> There is no functional change.
Reviewed-by: Ram Pai
>
> Cc: Ram Pai
> Cc: Bharata B Rao
> Cc: Paul Mackerras
> Signed-off-by: Laurent Dufour
> ---
RP
. In
> addition, the mmap_sem is help in read mode during that time, not in write
^^ held
> mode since the virual memory layout is not impacted, and
> kvm->arch.uvmem_lock prevents concurrent operation on the secure device.
>
> Cc: Ram Pai
Reviewed-by: Ram Pai
RP
On Mon, Jun 26, 2017 at 09:03:18AM +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)
> > bits at the appropriate location in the PTE of 4K PTE. In the
> > case of
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)
> > >
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
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
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
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
---
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
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
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
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
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
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
. 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
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
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
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
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
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
> >---
>
On Tue, Jul 11, 2017 at 10:33:09AM -0700, Dave Hansen wrote:
> On 07/05/2017 02:22 PM, Ram Pai wrote:
> > Abstracted out the arch specific code into the header file, and
> > added powerpc specific changes.
> >
> > a) added 4k-backed hpte, memory allocator, powerpc s
On Tue, Jul 11, 2017 at 11:10:46AM -0700, Dave Hansen wrote:
> On 07/05/2017 02:21 PM, Ram Pai wrote:
> > 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
On Wed, Jul 12, 2017 at 01:10:51PM +1000, Balbir Singh wrote:
> On Tue, 11 Jul 2017 08:44:15 -0700
> Ram Pai wrote:
>
> > On Tue, Jul 11, 2017 at 03:59:59PM +1000, Balbir Singh wrote:
> > > On Wed, 5 Jul 2017 14:21:39 -0700
> > > Ram Pai wrote:
> > >
On Wed, Jul 12, 2017 at 01:28:25PM +1000, Balbir Singh wrote:
> On Wed, 5 Jul 2017 14:21:51 -0700
> Ram Pai wrote:
>
> > Initial plumbing to manage all the keys supported by the
> > hardware.
> >
> > Total 32 keys are supported on powerpc. However pke
On Wed, Jul 12, 2017 at 03:26:01PM +1000, Balbir Singh wrote:
> On Wed, 5 Jul 2017 14:21:52 -0700
> Ram Pai wrote:
>
> > Implements helper functions to read and write the key related
> > registers; AMR, IAMR, UAMOR.
> >
> > AMR register tracks the read,w
On Tue, Jul 11, 2017 at 11:13:56AM -0700, Dave Hansen wrote:
> On 07/05/2017 02:22 PM, Ram Pai wrote:
> > +#ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS
> > +void arch_show_smap(struct seq_file *m, struct vm_area_struct *vma)
> > +{
> > + seq_printf(m, "Prot
On Thu, Jul 13, 2017 at 07:07:48AM -0700, Dave Hansen wrote:
> On 07/13/2017 01:03 AM, Ram Pai wrote:
> > On Tue, Jul 11, 2017 at 11:13:56AM -0700, Dave Hansen wrote:
> >> On 07/05/2017 02:22 PM, Ram Pai wrote:
> >>> +#ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS
>
On Tue, Jul 11, 2017 at 11:23:29AM -0700, Dave Hansen wrote:
> On 07/05/2017 02:22 PM, Ram Pai wrote:
> > Add documentation updates that capture PowerPC specific changes.
> >
> > Signed-off-by: Ram Pai
> > ---
> > Documentat
On Thu, Jul 13, 2017 at 12:45:00AM -0700, Ram Pai wrote:
> On Wed, Jul 12, 2017 at 01:28:25PM +1000, Balbir Singh wrote:
> > On Wed, 5 Jul 2017 14:21:51 -0700
> > Ram Pai wrote:
> >
> > > Initial plumbing to manage all the keys supported by the
> > > h
On Thu, Jul 13, 2017 at 07:49:05PM +1000, Balbir Singh wrote:
> On Thu, Jul 13, 2017 at 5:55 PM, Ram Pai wrote:
> > On Wed, Jul 12, 2017 at 03:26:01PM +1000, Balbir Singh wrote:
> >> On Wed, 5 Jul 2017 14:21:52 -0700
> >> Ram Pai wrote:
> >>
> >> &g
On Mon, Jul 10, 2017 at 08:40:19AM +0530, Anshuman Khandual wrote:
> On 07/06/2017 02:52 AM, Ram Pai wrote:
> > Capture the protection key that got violated in paca.
> > This value will be used by used to inform the signal
> > handler.
> >
> > Signed-off-by: R
On Mon, Jul 10, 2017 at 08:41:30AM +0530, Anshuman Khandual wrote:
> On 07/06/2017 02:52 AM, Ram Pai wrote:
> > get_pte_pkey() helper returns the pkey associated with
> > a address corresponding to a given mm_struct.
> >
> > Signed-off-by: Ram Pai
> > ---
> &
On Mon, Jul 10, 2017 at 08:37:04AM +0530, Anshuman Khandual wrote:
> On 07/06/2017 02:52 AM, Ram Pai wrote:
> > Add documentation updates that capture PowerPC specific changes.
> >
> > Signed-off-by: Ram Pai
> > ---
> > Documentat
On Mon, Jul 10, 2017 at 08:37:28AM +0530, Anshuman Khandual wrote:
> On 07/06/2017 02:52 AM, Ram Pai wrote:
> > Display the pkey number associated with the vma in smaps of a task.
> > The key will be seen as below:
> >
> > ProtectionKey: 0
> >
> > Si
On Mon, Jul 10, 2017 at 11:13:23AM +0530, Anshuman Khandual wrote:
> On 07/06/2017 02:51 AM, Ram Pai wrote:
> > Memory protection keys enable applications to protect its
> > address space from inadvertent access or corruption from
> > itself.
> >
> > The
On Sun, Jul 09, 2017 at 11:05:44PM -0700, Ram Pai wrote:
> On Mon, Jul 10, 2017 at 11:13:23AM +0530, Anshuman Khandual wrote:
> > On 07/06/2017 02:51 AM, Ram Pai wrote:
.
>
> > do you have data points to show the difference in
> > performance between this version and t
On Tue, Jul 11, 2017 at 03:59:59PM +1000, Balbir Singh wrote:
> On Wed, 5 Jul 2017 14:21:39 -0700
> Ram Pai wrote:
>
> > Rearrange 64K PTE bits to free up bits 3, 4, 5 and 6
> > in the 64K backed HPTE pages. This along with the earlier
> > patch will entirely
On Tue, Jul 11, 2017 at 04:52:46PM +0200, Michal Hocko wrote:
> On Wed 05-07-17 14:21:37, Ram Pai wrote:
> > Memory protection keys enable applications to protect its
> > address space from inadvertent access or corruption from
> > itself.
> >
> > The overall idea
On Wed, Jul 12, 2017 at 07:29:37AM +1000, Benjamin Herrenschmidt wrote:
> On Tue, 2017-07-11 at 11:11 -0700, Dave Hansen wrote:
> > On 07/05/2017 02:21 PM, Ram Pai wrote:
> > > Currently sys_pkey_create() provides the ability to disable read
> > > and write permissi
On Tue, Jul 11, 2017 at 02:57:30PM -0700, Dave Hansen wrote:
> On 07/11/2017 02:51 PM, Ram Pai wrote:
> > On Wed, Jul 12, 2017 at 07:29:37AM +1000, Benjamin Herrenschmidt wrote:
> >> On Tue, 2017-07-11 at 11:11 -0700, Dave Hansen wrote:
> >>> On 07/05/2017 02:21 PM, R
On Wed, Jul 12, 2017 at 08:08:56AM +1000, Benjamin Herrenschmidt wrote:
> On Tue, 2017-07-11 at 14:51 -0700, Ram Pai wrote:
> > On Wed, Jul 12, 2017 at 07:29:37AM +1000, Benjamin Herrenschmidt wrote:
> > > On Tue, 2017-07-11 at 11:11 -0700, Dave Hansen wrote:
> > > &g
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
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
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
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
. 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
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
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
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
--- a
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
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
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
---
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
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
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
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
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
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
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 inser
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
ff-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/in
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
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
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
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
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
replace redundant code with helper functions
pte_get_hash_gslot() and pte_set_hash_slot()
Signed-off-by: Ram Pai
---
arch/powerpc/mm/hash64_4k.c | 14 ++
1 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/mm/hash64_4k.c b/arch/powerpc/mm/hash64_4k.c
index
Implements helper functions to read and write the key related
registers; AMR, IAMR, UAMOR.
AMR register tracks the read,write permission of a key
IAMR register tracks the execute permission of a key
UAMOR register enables and disables a key
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm
replace redundant code in __hash_page_64K() with helper
functions pte_get_hash_gslot() and pte_set_hash_slot()
Signed-off-by: Ram Pai
---
arch/powerpc/mm/hash64_64k.c | 24
1 files changed, 4 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/mm/hash64_64k.c b
replace redundant code in __hash_page_4K() with helper
functions pte_get_hash_gslot() and pte_set_hash_slot()
Signed-off-by: Ram Pai
---
arch/powerpc/mm/hash64_64k.c | 34 +-
1 files changed, 9 insertions(+), 25 deletions(-)
diff --git a/arch/powerpc/mm
replace redundant code in flush_hash_page() with helper function
pte_get_hash_gslot().
Signed-off-by: Ram Pai
---
arch/powerpc/mm/hash_utils_64.c | 13 -
1 files changed, 4 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64
27;_'__'__'__'__'_'_'_'_'__'_'_'_'_'
The above PTE changes is applicable to hugetlbpages aswell.
The patch does the following code changes:
a) moves the H_PAGE_F_SECOND and H_PAGE_F_GIX to 4k PTE
header
take some additional parameters to keep the prototype consistent.
This function will be handy as we work towards re-arranging the
bits in the later patches.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/hash-4k.h | 15 +++
arch/powerpc/include/asm/book3s/64
ded advantage of
releasing four valuable PTE bits for other purpose.
NOTE:even though bits 3, 4, 5, 6, 7 are not used when
the 64K PTE is backed by 4k HPTE, they continue to be
used if the PTE gets backed by 64k HPTE. The next
patch will decouple that aswell, and truely relea
basic setup to initialize the pkey system. Only 64K kernel in HPT
mode, enables the pkey system.
Signed-off-by: Ram Pai
---
arch/powerpc/Kconfig | 16 ++
arch/powerpc/include/asm/mmu_context.h |5 +++
arch/powerpc/include/asm/pkeys.h | 51
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
ABI breakage caused in siginfo
structure.
-- Reported by Anshuman.
version v1: Initial version
Ram Pai (62):
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 pt
replace redundant code in __hash_page_64K() with helper
functions pte_get_hash_gslot() and pte_set_hash_slot()
Signed-off-by: Ram Pai
---
arch/powerpc/mm/hash64_64k.c | 24
1 files changed, 4 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/mm/hash64_64k.c b
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
---
arch/powerpc/include/asm/pkeys.h | 12
arch/powerpc/mm/pkeys.c | 10 ++
2 files changed, 22 insertions(+), 0
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 | 14
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 | 12
arch/powerpc/mm/hash_utils_64.c
Introduce helper functions that can initialize the bits in the AMR,
IAMR and UMOR register; the bits that correspond to the given pkey.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/pkeys.h |1 +
arch/powerpc/mm/pkeys.c | 44 ++
2 files
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
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 | 25 +
2 files changed, 30
case.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/reg.h |3 ++-
arch/powerpc/mm/fault.c| 21 +
2 files changed, 23 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index ee04bc0..b7cbc8c 100644
Introduce powerpc implementation for the various
abstactions.
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/pkey-helpers.h| 97 +++--
tools/testing/selftests/vm/protection_keys.c | 33 +
2 files changed, 107 insertions(+), 23 deletions(-)
diff --git
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
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