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 19ae991..2600f7a 100644
--- a/tools
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 | 38 ++
2 files changed, 117 insertions(+), 30 deletions(-)
diff
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
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
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 +-
.../testing/selftests/powerpc/ptrace/ptrace-pkey
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
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 c
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
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
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 | 71 ++
2 files changed, 52 insertions(+), 46
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/Makefile |1 +
tools/testing/selftests/vm/pkey-helpers.h | 220
tools/testing/selftests/vm/protection_keys.c | 1395 +
tools/testing/selftests/x86/Makefile |2 +-
tools/testing
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
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
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
igned-off-by: Ram Pai
---
arch/powerpc/include/asm/systbl.h |1 +
arch/powerpc/include/asm/unistd.h |2 +-
arch/powerpc/include/uapi/asm/unistd.h |1 +
arch/powerpc/kernel/entry_64.S |9 +
arch/powerpc/mm/pkeys.c| 17 +
5
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
get_mm_addr_key() helper returns the pkey associated with
an address corresponding to a given mm_struct.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/mmu.h |9 +
arch/powerpc/mm/hash_utils_64.c | 24
2 files changed, 33 insertions(+), 0 deletions
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 | 13 +
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h
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 till
the system call is implemented. The next patch will
do so.
Reviewed-by: Thiago Jung Bauermann
Signed-off-by: Ram Pai
---
arch
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
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/pk
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/includ
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
ctly 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 (47):
mm, power
On Mon, Oct 09, 2017 at 02:39:49PM -0700, Dawid Ciezarkiewicz wrote:
> On Sun, Oct 8, 2017 at 5:15 PM, Ram Pai wrote:
> >>
> >> One thing that I don't plan to use, but might be worth thinking about is
> >> `slave + RW + STICKY` combination. If `master` m
On Fri, Sep 29, 2017 at 04:02:42PM -0700, Dawid Ciezarkiewicz wrote:
> On Fri, Sep 22, 2017 at 11:43 AM, Dawid Ciezarkiewicz
> wrote:
> > On Thu, Sep 21, 2017 at 12:14 PM, Ram Pai wrote:
> >> Here is a patch that accomplishes the job. tested to work with
> >> so
On Fri, Sep 22, 2017 at 04:00:19PM +1000, Balbir Singh wrote:
> On Fri, 15 Sep 2017 18:21:08 -0700
> Ram Pai wrote:
>
> > From: Thiago Jung Bauermann
> >
> > Expose useful information for programs using memory protection keys.
> > Provide implementation f
On Wed, Sep 20, 2017 at 08:00:57PM -0700, Dawid Ciezarkiewicz wrote:
> On Wed, Sep 20, 2017 at 5:39 PM, Ram Pai wrote:
> > Anyway; so something like this should be possible without breaking
> > existing semantics.
> >
> > mount -o bind,remount,ro /mnt
> >
On Wed, Sep 20, 2017 at 06:06:55PM -0500, Eric W. Biederman wrote:
> ebied...@xmission.com (Eric W. Biederman) writes:
>
> > Ram Pai writes:
> >
> >> sorry forgot to copy Eric.
> >
> > Adding fs-devel as well.
> >
> >> On Wed, Sep 20, 2017 at
sorry forgot to copy Eric.
On Wed, Sep 20, 2017 at 12:39:54PM -0700, Ram Pai wrote:
> On Tue, Sep 19, 2017 at 04:18:02PM -0700, Dawid Ciezarkiewicz wrote:
> > On Mon, Sep 18, 2017 at 1:47 PM, Ram Pai wrote:
> > > It is possible to make a slave mount readonly, by remounting
On Tue, Sep 19, 2017 at 04:18:02PM -0700, Dawid Ciezarkiewicz wrote:
> On Mon, Sep 18, 2017 at 1:47 PM, Ram Pai wrote:
> > It is possible to make a slave mount readonly, by remounting it with
> > 'ro' flags.
> >
> > something like
> >
> > mount
On Fri, Sep 15, 2017 at 10:57:30AM -0700, Dawid Ciezarkiewicz wrote:
> Hi,
>
> (Please keep me in CC me when responding.)
>
> I have an use-case for shared subtrees that is not covered by:
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.kernel.org_doc_Documentation_filesystems_share
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
<==
false
==> /sys/kernel/mm/protection_keys/total_keys <==
1
==> /sys/kernel/mm/protection_keys/usable_keys <==
0
Signed-off-by: Ram Pai
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/pkeys.h |2 +
arch/powerpc/mm/pkeys.c| 20
arch/x
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
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.
Signed-off-by: Ram Pai
---
fs/proc/task_mmu.c |6 --
include/linux/mm.h | 16 ++--
2
Add documentation updates that capture PowerPC specific changes.
Signed-off-by: Thiago Jung Bauermann
Signed-off-by: Ram Pai
---
Documentation/vm/protection-keys.txt | 125 +++---
1 files changed, 100 insertions(+), 25 deletions(-)
diff --git a/Documentation/vm
change in logic that displays key
value in smaps.
(3) code rearranged in many places based on
comments from Dave Hansen, Balbir,
Anshuman.
version v1: Initial version
Ram Pai (5):
mm: introduce an additional vma bit for powerpc pkey
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
On Sat, Aug 19, 2017 at 02:09:58PM -0500, Eric W. Biederman wrote:
> Ram Pai writes:
>
> > diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
> > index d4e545d..fe1e7c7 100644
> > --- a/arch/powerpc/kernel/traps.c
> > +++ b/arch/powerpc/ker
On Thu, Aug 17, 2017 at 04:35:55PM -0700, Ram Pai wrote:
> On Wed, Aug 02, 2017 at 07:40:46PM +1000, Michael Ellerman wrote:
> > Thiago Jung Bauermann writes:
> >
> > > Michael Ellerman writes:
> > >
> > >> Thiago Ju
On Fri, Jul 28, 2017 at 07:17:13PM -0300, Thiago Jung Bauermann wrote:
>
> Ram Pai writes:
> > --- a/arch/powerpc/mm/pkeys.c
> > +++ b/arch/powerpc/mm/pkeys.c
> > @@ -97,3 +97,60 @@ int __arch_set_user_pkey_access(struct task_struct *tsk,
> > int pkey,
> &g
On Fri, Jul 28, 2017 at 06:00:02PM -0300, Thiago Jung Bauermann wrote:
>
> Ram Pai writes:
> > --- a/arch/powerpc/mm/pkeys.c
> > +++ b/arch/powerpc/mm/pkeys.c
> > @@ -201,3 +201,36 @@ int __arch_override_mprotect_pkey(struct
> > vm_area_struct *vma, int prot,
>
On Thu, Jul 27, 2017 at 05:40:44PM -0300, Thiago Jung Bauermann wrote:
>
> Ram Pai writes:
>
> > 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:
On Thu, Jul 27, 2017 at 02:32:59PM -0300, Thiago Jung Bauermann wrote:
>
> Ram Pai writes:
>
> > 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 Pa
On Thu, Jul 27, 2017 at 11:54:31AM -0300, Thiago Jung Bauermann wrote:
>
> Ram Pai writes:
>
> > --- a/arch/powerpc/include/asm/pkeys.h
> > +++ b/arch/powerpc/include/asm/pkeys.h
> > @@ -2,6 +2,18 @@
> > #define _ASM_PPC64_PKEYS_H
> >
> > extern b
On Thu, Jul 27, 2017 at 11:15:36AM -0300, Thiago Jung Bauermann wrote:
>
> Ram Pai writes:
> > @@ -113,10 +117,14 @@ static inline int arch_override_mprotect_pkey(struct
> > vm_area_struct *vma,
> > return 0;
> > }
> >
> > +extern int __arch_se
> But hopefully the comments that I currently have will be helpful anyway.
sure. thanx for taking the time to look through the patches.
>
> Ram Pai writes:
> > diff --git a/arch/powerpc/include/asm/pkeys.h
> > b/arch/powerpc/include/asm/pkeys.h
> > index 203d7de..09b268e 1
On Fri, Jul 21, 2017 at 12:21:50PM +0530, Aneesh Kumar K.V wrote:
> Ram Pai writes:
>
> > On Thu, Jul 20, 2017 at 12:12:47PM +0530, Aneesh Kumar K.V wrote:
> >> Ram Pai writes:
> >>
> >> > helper function that checks if the read/write/execute is allow
On Thu, Jul 20, 2017 at 12:12:47PM +0530, Aneesh Kumar K.V wrote:
> Ram Pai writes:
>
> > helper function that checks if the read/write/execute is allowed
> > on the pte.
> >
> > Signed-off-by: Ram Pai
> > ---
> > arch/powerpc/include/asm/book3s
On Thu, Jul 20, 2017 at 11:34:10AM +0530, Aneesh Kumar K.V wrote:
> Ram Pai writes:
>
> > basic setup to initialize the pkey system. Only 64K kernel in HPT
> > mode, enables the pkey system.
> >
> > Signed-off-by: Ram Pai
> > ---
> > arc
On Thu, Jul 20, 2017 at 11:21:51AM +0530, Aneesh Kumar K.V wrote:
>
> .
>
> > /*
> > @@ -116,8 +104,8 @@ int __hash_page_4K(unsigned long ea, unsigned long
> > access, unsigned long vsid,
> > * On hash insert failure we use old pte value and we don't
> > * want
| | | |..|S|G|I|X| <- secondary pte
'_'_'_'_'__'__'__'__'_'_'_'_'__'_'_'_'_'
The above PTE changes is applicable to hugetlbpages aswell.
The patch does the following code
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
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
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
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_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 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
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.
Signed-off-by: Ram Pai
---
fs/proc/task_mmu.c |6 --
include/linux/mm.h | 20
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
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
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
to be available.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/mmu.h |9 +++
arch/powerpc/include/asm/mmu_context.h |1 +
arch/powerpc/include/asm/pkeys.h | 81 --
arch/powerpc/mm/mmu_context_book3s64.c |2 +
4 files changed
cleanup the bits corresponding to a key in the AMR, and IAMR
register, when the key is newly allocated/activated or is freed.
We dont want some residual bits cause the hardware enforce
unintended behavior when the key is activated or freed.
Signed-off-by: Ram Pai
---
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
---
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 till
the system call is implemented. The next patch will
do so.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/pkeys.h | 10
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 | 12
3 files changed, 39 insertions(+), 1 deletions(-)
diff --git a/arch/po
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 | 18 +++---
2 files changed, 22 inser
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
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 | 12 +
arch/powerpc/mm/pkeys.c | 33
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
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| 43
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
Capture the protection key that got violated in paca.
This value will be later 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 |8
3 files changed
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
arch_pkeys_enabled() returns true if the cpu
supports protection key, and the kernel has it
enabled.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/pkeys.h |5 +
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/pkeys.h b/arch/powerpc/include
Only the architecture knows if it supports protection keys.
Hence introducing arch_pkeys_enabled().
This function is needed by arch neutral code.
One use case is -- to determine if the
protection key needs to be displayed in smaps.
Signed-off-by: Ram Pai
---
include/linux/pkeys.h
arch_pkeys_enabled() returns true if the cpu
supports X86_FEATURE_OSPKE.
Signed-off-by: Ram Pai
---
arch/x86/include/asm/pkeys.h |1 +
arch/x86/kernel/fpu/xstate.c |5 +
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/pkeys.h b/arch/x86/include
support pkeys.
Signed-off-by: Ram Pai
---
fs/proc/task_mmu.c |9 -
1 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index e5710bc..d2b3e75 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -16,6 +16,7 @@
#include
#include
arch_show_smap() function is not needed anymore.
Delete it.
Signed-off-by: Ram Pai
---
arch/x86/kernel/setup.c |8
1 files changed, 0 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f818236..5efe4c3 100644
--- a/arch/x86/kernel
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
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
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 | 75 ++
2 files changed, 54 insertions(+), 48
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 a
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
Moved all the generic definition and helper functions to the
header file
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/pkey-helpers.h| 62 +++--
tools/testing/selftests/vm/protection_keys.c | 54 --
2 files changed, 57 insertions(+), 59
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
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
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
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
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
The maximum number of keys that can be allocated has to
take into consideration that some keys are reserved by
the architecture of specific purpose and cannot be allocated.
Fix the assertion in test_pkey_alloc_exhaust()
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/protection_keys.c
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
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 | 29 ++
1 files changed, 29 insertions(+), 0 deletions(-)
diff
a access-denied key should not trigger any key violation
after the key has been freed.
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/protection_keys.c | 25 +
1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/tools/testing/selftests/vm
Add documentation updates that capture PowerPC specific changes.
Signed-off-by: Ram Pai
---
Documentation/vm/protection-keys.txt | 90 -
1 files changed, 65 insertions(+), 25 deletions(-)
diff --git a/Documentation/vm/protection-keys.txt
b/Documentation/vm
a write-denied key should not trigger any key violation
after the key has been freed.
Signed-off-by: Ram Pai
---
tools/testing/selftests/vm/protection_keys.c | 18 ++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/tools/testing/selftests/vm/protection_keys.c
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
201 - 300 of 567 matches
Mail list logo
