Add documentation updates that capture PowerPC specific changes.
Signed-off-by: Ram Pai
---
Documentation/vm/protection-keys.txt | 65 +---
1 file changed, 45 insertions(+), 20 deletions(-)
diff --git a/Documentation/vm/protection-keys.txt
b/Documentation/vm/pro
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 inse
This patch series contains miscellaneous fixes and several enhancements
such as LUN provisioning support, WS16 unmap and AFU debug capabilities.
This series is intended for 4.13 and is bisectable.
Matthew R. Ochs (8):
cxlflash: Separate AFU internal command handling from AFU sync
specifics
Currently there are separate spin locks for the two supported I/O queueing
models. This makes it difficult to serialize with paths outside the enqueue
path.
As a design simplification and to support serialization with enqueue
operations, move to only a single lock that is used for enqueueing
regar
The cxlflash_afu_sync() routine returns a negative one to indicate any kind
of failure. This makes it impossible to establish why the error occurred.
Update the return codes to clearly indicate the failure cause to the
caller.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 11 ++
Per the SISLite specification, context_reset() writes 0x1 to the LSB of the
reset register. When the AFU processes this reset request, it is expected
to clear the bit after reset is complete. The current implementation simply
checks that the entire value read back is not 1, instead of masking off t
A context reset failure indicates the AFU is in a bad state. At present,
when such a situation occurs, no further action is taken. This leaves the
adapter in an unusable state with no recoverable actions.
To avoid this situation, context reset failures will be escalated to a host
reset operation.
AFU sync operations are not currently evaluated for failure. This is
acceptable for paths where there is not a dependency on the AFU being
consistent with the host. Examples include link reset events and LUN
cleanup operations. On paths where there is a dependency, such as a LUN
open, a sync failur
Currently, there is no book keeping of the pending scsi commands in the
cxlflash driver. This lack of tracking in-flight requests is too
restrictive and requires a heavy-hammer reset each time an adapter error is
encountered. Additionally, it does not allow for commands to be properly
retried.
In
When the AFU is reset in an error path, pending scsi commands can be
silently dropped without completion or a formal abort. This puts the onus
on the cxlflash driver to notify mid-layer and indicating that the command
can be retried.
Once the card has been quiesced, the hardware send queue lock is
To date, CXL flash devices do not support a single command abort operation.
Instead, the SISLite specification provides a context reset operation to
cleanup all pending commands for a given context.
When a context reset is successful, it is guaranteed that the AFU has
aborted all currently pending
The cxlflash driver currently lacks host management interface. Future
devices supported by cxlflash will provide a variety of host-wide
management functions. Examples include LUN provisioning, hardware debug
support, and firmware download.
In order to provide a way to manage the device, a characte
From: "Matthew R. Ochs"
To date the only supported internal AFU command is AFU sync. The logic
to send an internal AFU command is embedded in the specific AFU sync
handler and would need to be duplicated for new internal AFU commands.
In order to support new internal AFU commands, separate code
From: "Matthew R. Ochs"
As staging for supporting various host management functions, add a host
ioctl infrastructure to filter ioctl commands and perform operations that
are common for all host ioctls. Also update the cxlflash documentation to
create a new section for documenting host ioctls.
Si
From: "Matthew R. Ochs"
The existing AFU capability checking infrastructure is closely tied to
the command mode capability bits. In order to support new capabilities,
refactor the existing infrastructure to be more generic.
Signed-off-by: Matthew R. Ochs
Signed-off-by: Uma Krishnan
---
driver
From: "Matthew R. Ochs"
Adopt the SISLite AFU LUN provisioning capability to allow future CXL
Flash adapters the ability to better manage storage. Update the SISLite
header with the changes necessary to support LUN provision operations
and create a host ioctl interface for user LUN management sof
From: "Matthew R. Ochs"
Adopt the SISLite AFU debug capability to allow future CXL Flash
adapters the ability to better debug AFU issues. Update the SISLite
header with the changes necessary to support AFU debug operations
and create a host ioctl interface for user debug software. Also
update the
From: "Matthew R. Ochs"
The cxlflash driver supports performing a write-same16 to scrub virtual
luns when they are released by a user. To date, AFUs for adapters that
are supported by cxlflash do not have the capability to unmap as part of
the WS operation. This can lead to fragmented flash devic
From: "Matthew R. Ochs"
The SCSI core now zeroes the per-command private data area prior to
calling into the LLD. Replace the clearing operation that takes place
when the private command data reference is obtained with a routine that
performs common initializations. The zeroing that takes place i
From: "Matthew R. Ochs"
Currently, the SCSI command presented to the device reset handler is used
to send TMFs to the AFU for a device reset. This behavior is incorrect as
the command presented is an actual command and not a special notification.
As such, it should only be used for reference and
On Thu, 22 Jun 2017 00:08:37 +0530
"Naveen N. Rao" wrote:
> Currently, we assume that the function pointer we receive in
> ppc_function_entry() points to a function descriptor. However, this is
> not always the case. In particular, assembly symbols without the right
> annotation do not have an as
On Thu, 22 Jun 2017 00:08:38 +0530
"Naveen N. Rao" wrote:
> Commit b48bbb82e2b835 ("powerpc/64s: Don't unbalance the return branch
> predictor in __replay_interrupt()") introduced __replay_interrupt_return
> symbol with '.L' prefix in hopes of keeping it private. However, due to
> the use of LOAD
On Thu, 22 Jun 2017 00:08:39 +0530
"Naveen N. Rao" wrote:
> Convert some of the symbols into private symbols and blacklist
> system_call_common() and system_call() from kprobes. We can't take a
> trap at parts of these functions as either MSR_RI is unset or the kernel
> stack pointer is not yet s
On Thu, 22 Jun 2017 00:08:40 +0530
"Naveen N. Rao" wrote:
> It is actually safe to probe system_call() in entry_64.S, but only till
> we unset MSR_RI. To allow this, add a new symbol system_call_exit()
> after the mtmsrd and blacklist that. Though the mtmsrd instruction
> itself is now whiteliste
On Thu, 22 Jun 2017 00:08:41 +0530
"Naveen N. Rao" wrote:
> Blacklist all functions involved while handling a trap. We:
> - convert some of the symbols into private symbols,
> - remove the duplicate 'restore' symbol, and
> - blacklist most functions involved while handling a trap.
I'm not sure r
On Thu, 22 Jun 2017 00:08:42 +0530
"Naveen N. Rao" wrote:
> We can't take traps with relocation off, so blacklist enter_rtas() and
> rtas_return_loc(). However, instead of blacklisting all of enter_rtas(),
> introduce a new symbol __enter_rtas from where on we can't take a trap
> and blacklist th
On Wed, Jun 21, 2017 at 01:53:18PM +0200, Jiri Slaby wrote:
> There is code duplicated over all architecture's headers for
> futex_atomic_op_inuser. Namely op decoding, access_ok check for uaddr,
> and comparison of the result.
>
> Remove this duplication and leave up to the arches only the needed
Hi Victor,
Someone refreshed my memory on this, coffee was involved ...
victora writes:
> Hi Alistair/Jeremy,
>
> I am working on a bug related to 1M hugepage size being registered on
> Linux (Power 8 Baremetal - Garrison).
On those machines the property in the device tree comes straight from
Hi Cyril,
On 06/22/2017 06:28 AM, Cyril Bur wrote:
> On Wed, 2017-06-21 at 13:36 +0530, Shilpasri G Bhat wrote:
>> 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
On Wed, Jun 21, 2017 at 10:50:12AM +0530, Aneesh Kumar K.V wrote:
> The bit position is now marked reserved. Hence don't set the bit to 1.
>
> Signed-off-by: Aneesh Kumar K.V
> ---
> arch/powerpc/include/asm/book3s/64/mmu.h | 1 -
> arch/powerpc/kvm/book3s_hv.c | 6 +-
> arch/pow
On Thu, 2017-06-22 at 09:57 +0530, Shilpasri G Bhat wrote:
> Hi Cyril,
>
> On 06/22/2017 06:28 AM, Cyril Bur wrote:
> > On Wed, 2017-06-21 at 13:36 +0530, Shilpasri G Bhat wrote:
> > > In P9, OCC (On-Chip-Controller) supports shared memory based
> > > commad-response interface. Within the shared m
The SLB miss handler calls slb_allocate_realmode() in order to create an
SLB entry for the faulting address. At the very start of that function
we check that the faulting Effective Address (EA) is less than
PGTABLE_RANGE (ignoring the region), ie. is it an address which could
possibly fit in the vi
This patch exports a in-kernel 'library' API which can be called by
other drivers to help interacting with an IBM XSL on a POWER9 system.
The XSL (Translation Service Layer) is a stripped down version of the
PSL (Power Service Layer) used in some cards such as the Mellanox CX5.
Like the PSL, it im
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