On Fri, Jul 28, 2017 at 12:09:56PM -0700, Paul E. McKenney wrote:
> On Fri, Jul 28, 2017 at 11:41:29AM -0700, Paul E. McKenney wrote:
> > On Fri, Jul 28, 2017 at 07:55:30AM -0700, Paul E. McKenney wrote:
> > > On Fri, Jul 28, 2017 at 08:54:16PM +0800, Boqun Feng wrote:
>
> [ . . . ]
>
> > > Even
On Sun, Jul 30, 2017 at 4:49 PM, Thorsten Leemhuis
wrote:
> Hi! Find below my first regression report for Linux 4.13. It lists 8
> regressions I'm currently aware of (a few others I had on my list got
> fixed in the past few days). You can also find it at
> http://bit.ly/lnxregrep413 where I try t
Hi! Find below my first regression report for Linux 4.13. It lists 8
regressions I'm currently aware of (a few others I had on my list got
fixed in the past few days). You can also find it at
http://bit.ly/lnxregrep413 where I try to update it every now and then.
As always: Are you aware of any ot
On Thu, 2017-07-06 at 19:17 -0300, Thiago Jung Bauermann wrote:
> This patch introduces the modsig keyword to the IMA policy syntax to
> specify that a given hook should expect the file to have the IMA signature
> appended to it. Here is how it can be used in a rule:
>
> appraise func=KEXEC_KERNEL
On Sun, Jul 30, 2017 at 09:37:47PM +0800, Boqun Feng wrote:
> On Fri, Jul 28, 2017 at 12:09:56PM -0700, Paul E. McKenney wrote:
> > On Fri, Jul 28, 2017 at 11:41:29AM -0700, Paul E. McKenney wrote:
> > > On Fri, Jul 28, 2017 at 07:55:30AM -0700, Paul E. McKenney wrote:
> > > > On Fri, Jul 28, 2017
RPAGE_RSV0..4 pte bits are currently used for hpte slot
tracking. We need these bits for memory-protection
keys. Luckily these four bits are relatively easier
to move among all the other candidate bits.
For 64K linux-ptes backed by 4k hptes, these bits
are used for tracking the
Rearrange 64K PTE bits to free up bits 3, 4, 5 and 6,
in the 4K backed HPTE pages.These bits continue to be used
for 64K backed HPTE pages in this patch, but will be freed
up in the next patch. The bit numbers are big-endian as
defined in the ISA3.0
The patch does the following change to t
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 free up the four bits from 64K PTE.
The bit numbers are big-endian as defined in the ISA3.0
This patch does the following change to 64K PTE backed
by 64K H
We need PTE bits 3 ,4, 5, 6 and 57 to support protection-keys,
because these are the bits we want to consolidate on across all
configuration to support protection keys.
Bit 3,4,5 and 6 are currently used on 4K-pte kernels. But bit 9
and 10 are available. Hence we use the two available bits
The H_PAGE_F_SECOND,H_PAGE_F_GIX are not in the 64K main-PTE.
capture these changes in the dump pte report.
Reviewed-by: Aneesh Kumar K.V
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/
Introduce pte_set_hash_slot().It sets the (H_PAGE_F_SECOND|H_PAGE_F_GIX)
bits at the appropriate location in the PTE of 4K PTE. For
64K PTE, it sets the bits in the second part of the PTE. Though
the implementation for the former just needs the slot parameter, it does
tak
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.
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/book3s/64/h
replace redundant code in __hash_page_64K(), __hash_page_huge(),
__hash_page_4K(), __hash_page_4K() and flush_hash_page() with
helper functions pte_get_hash_gslot() and pte_set_hash_slot()
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Ram Pai
---
arch/powerpc/mm/hash64_4k.c | 14 +
Memory protection keys enable applications to protect its
address space from inadvertent access from or corruption
by itself.
The overall idea:
-
A process allocates a key and associates it with
an address range withinits address space.
The process then can dyn
powerpc needs an additional vma bit to support 32 keys.
Till the additional vma bit lands in include/linux/mm.h
we have to define it in powerpc specific header file.
This is needed to get pkeys working on power.
Signed-off-by: Ram Pai
---
arch/powerpc/include/asm/pkeys.h | 18 ++
Total 32 keys are available on power7 and above. However
pkey 0,1 are reserved. So effectively we have 30 pkeys.
On 4K kernels, we do not have 5 bits in the PTE to
represent all the keys; we only have 3bits.Two of those
keys are reserved; pkey 0 and pkey 1. So effectively we
have 6 pkeys
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/bo
Introduce helper functions that can initialize the bits in the AMR,
IAMR and UAMOR 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 | 46 ++
2 files
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/pke
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 |9 +++
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 inser
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 |5 +
2 files changed, 17 insertions(+), 0 deletion
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/pkeys.h |5 +
arch/powerpc/include/asm/processor.h |5 +
arch/powerpc/kernel/process.c
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
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 | 12
2 files changed, 19 insertions(+), 1
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 | 17 ++-
map the key protection bits of the vma to the pkey bits in
the PTE.
The Pte bits used for pkey are 3,4,5,6 and 57. The first
four bits are the same four bits that were freed up initially
in this patch series. remember? :-) Without those four bits
this patch would'nt be possible.
BUT, O
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
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/mmu_context.h|6 ++
arch/powerpc/include/asm/pkeys.h | 13
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 | 28 ++
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
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/as
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 ++
Handle Data and Instruction exceptions caused by memory
protection-key.
The CPU will detect the key fault if the HPTE is already
programmed with the key.
However if the HPTE is not hashed, a key fault will not
be detected by the hardware. The software will detect
pkey violation in such a cas
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/powerpc
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 insertio
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,
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 |1
PAPR defines 'ibm,processor-storage-keys' property. It exports
two values.The first value indicates the number of data-access
keys and the second indicates the number of instruction-access
keys. Though this alludes that keys can be either data access
or instructon access only, that is not the case
This patch adds emulation of the cmpb instruction, enabling xmon to
emulate this instruction.
Tested for correctness against the cmpb asm instruction on ppc64le.
Signed-off-by: Matt Brown
---
v2:
- fixed opcode
- fixed mask typecasting
---
arch/powerpc/lib/sstep.c | 20 +
This adds emulations for the popcntb, popcntw, and popcntd instructions.
Tested for correctness against the popcnt{b,w,d} instructions on ppc64le.
Signed-off-by: Matt Brown
---
v4:
- change ifdef macro from __powerpc64__ to CONFIG_PPC64
- slight optimisations
(now identic
This adds emulation for the bpermd instruction.
Tested for correctness against the bpermd instruction on ppc64le.
Signed-off-by: Matt Brown
---
v4:
- change ifdef macro from __powerpc64__ to CONFIG_PPC64
v2:
- fixed opcode
- added ifdef tags to do_bpermd func
- fix
This adds emulation for the prtyw and prtyd instructions.
Tested for logical correctness against the prtyw and prtyd instructions
on ppc64le.
Signed-off-by: Matt Brown
---
v4:
- use simpler xor method
v3:
- optimised using the Giles-Miller method of side-ways addition
v2:
This adds emulation for the isel instruction.
Tested for correctness against the isel instruction and its extended
mnemonics (lt, gt, eq) on ppc64le.
Signed-off-by: Matt Brown
---
v4:
- simplify if statement to ternary op
(same as isel emulation in kernel/traps.c)
v2:
- fi
On Mon, 2017-07-31 at 10:58 +1000, Matt Brown wrote:
> This patch adds emulation of the cmpb instruction, enabling xmon to
> emulate this instruction.
> Tested for correctness against the cmpb asm instruction on ppc64le.
>
> Signed-off-by: Matt Brown
Reviewed-by: Cyril Bur
> ---
> v2:
>
In P9, OCC (On-Chip-Controller) supports shared memory based
commad-response interface. Within the shared memory there is an OPAL
command buffer and OCC response buffer that can be used to send
inband commands to OCC. The following commands are supported:
1) Set system powercap
2) Set CPU-GPU powe
Adds a generic powercap framework to change the system powercap
inband through OPAL-OCC command/response interface.
Signed-off-by: Shilpasri G Bhat
---
Changes from V8:
- Use __pa() while passing pointer in opal call
- Use mutex_lock_interruptible()
- Fix error codes returned to user
- Allocate a
This patch adds support to set power-shifting-ratio which hints the
firmware how to distribute/throttle power between different entities
in a system (e.g CPU v/s GPU). This ratio is used by OCC for power
capping algorithm.
Signed-off-by: Shilpasri G Bhat
---
Changes from V8:
- Use __pa() while pa
Adds support for clearing different sensor groups. OCC inband sensor
groups like CSM, Profiler, Job Scheduler can be cleared using this
driver. The min/max of all sensors belonging to these sensor groups
will be cleared.
Signed-off-by: Shilpasri G Bhat
---
Changes from V8:
- Use mutex_lock_interr
On Mon, 2017-07-31 at 10:58 +1000, Matt Brown wrote:
> This adds emulation for the bpermd instruction.
> Tested for correctness against the bpermd instruction on ppc64le.
>
> Signed-off-by: Matt Brown
Reviewed-by: Cyril Bur
> ---
> v4:
> - change ifdef macro from __powerpc64__ to CONFIG_
On Mon, 2017-07-31 at 10:58 +1000, Matt Brown wrote:
> This adds emulation for the prtyw and prtyd instructions.
> Tested for logical correctness against the prtyw and prtyd instructions
> on ppc64le.
>
> Signed-off-by: Matt Brown
Reviewed-by: Cyril Bur
> ---
> v4:
> - use simpler xor me
On Mon, 2017-07-31 at 10:58 +1000, Matt Brown wrote:
> This adds emulation for the isel instruction.
> Tested for correctness against the isel instruction and its extended
> mnemonics (lt, gt, eq) on ppc64le.
>
> Signed-off-by: Matt Brown
Reviewed-by: Cyril Bur
> ---
> v4:
> - simplify i
On Mon, 2017-07-31 at 10:58 +1000, Matt Brown wrote:
> This adds emulations for the popcntb, popcntw, and popcntd instructions.
> Tested for correctness against the popcnt{b,w,d} instructions on ppc64le.
>
> Signed-off-by: Matt Brown
Unlike the rest of this series, it isn't immediately clear tha
On Mon, 2017-07-31 at 07:54 +0530, Shilpasri G Bhat wrote:
> Adds a generic powercap framework to change the system powercap
> inband through OPAL-OCC command/response interface.
>
> Signed-off-by: Shilpasri G Bhat
> ---
> Changes from V8:
> - Use __pa() while passing pointer in opal call
> - Use
On Thu, Jul 13, 2017 at 10:38:29AM +0300, Dan Carpenter wrote:
> There are some error paths in kvmppc_core_vcpu_create_e500() where we
> forget to set the error code. It means that we return ERR_PTR(0) which
> is NULL and it results in a NULL pointer dereference in the caller.
>
> Signed-off-by:
On Wed, 2017-07-19 at 05:44:13 UTC, Gustavo Romero wrote:
> Currently flush_tmregs_to_thread() does not update accordingly the thread
> structures from live state before a core dump rendering wrong values of
> THFAR, TFIAR, and TEXASR in core dump files.
>
> That commit fixes it by copying from li
On Wed, 2017-07-26 at 05:26:40 UTC, Alistair Popple wrote:
> Commit 8e3f1b1d8255 ("powerpc/powernv/pci: Enable 64-bit devices to access
> >4GB DMA space") introduced the ability for PCI device drivers to request a
> DMA mask between 64 and 32 bits and actually get a mask greater than
> 32-bits. How
On Wed, 2017-07-26 at 13:19:04 UTC, Michael Ellerman wrote:
> Historically the boot wrapper was always built 32-bit big endian, even
> for 64-bit kernels. That was because old firmwares didn't necessarily
> support booting a 64-bit image. Because of that arch/powerpc/boot/Makefile
> uses CROSS32CC
On Thu, 2017-07-27 at 13:23:37 UTC, Michael Ellerman wrote:
> In smp_cpus_done() we need to call smp_ops->setup_cpu() for the boot
> CPU, which means it has to run *on* the boot CPU.
>
> In the past we ensured it ran on the boot CPU by changing the CPU
> affinity mask of current directly. That was
59 matches
Mail list logo
