The architecture independent routine hugetlb_default_setup sets up
the default huge pages size. It has no way to verify if the passed
value is valid, so it accepts it and attempts to validate at a later
time. This requires undocumented cooperation between the arch specific
and arch independent
On 4/1/20 11:38 AM, Mike Kravetz wrote:
> With all hugetlb page processing done in a single file clean up code.
> - Make code match desired semantics
> - Update documentation with semantics
> - Make all warnings and errors messages start with 'HugeTLB:'.
> - Consistently name command line
Added test case for parsing "?" in metric expression.
Signed-off-by: Kajol Jain
---
tools/perf/tests/expr.c | 8
1 file changed, 8 insertions(+)
diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index 516504cf0ea5..f9e8e5628836 100644
--- a/tools/perf/tests/expr.c
+++
Commit 54b5091606c18 ("perf stat: Implement --metric-only mode")
added function 'valid_only_metric()' which drops "Hz" or "hz",
if it is part of "ScaleUnit". This patch enable it since hv_24x7
supports couple of frequency events.
Signed-off-by: Kajol Jain
---
tools/perf/util/stat-display.c | 2
On power9, Virtual Accelerator Switchboard (VAS) allows user space or
kernel to communicate with Nest Accelerator (NX) directly using COPY/PASTE
instructions. NX provides various functionalities such as compression,
encryption and etc. But only compression (842 and GZIP formats) is
supported in
On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva wrote:
>
> This patch enables the OpenCAPI Persistent Memory driver, as well
> as DAX support, for the 'powernv' defconfig.
>
> DAX is not a strict requirement for the functioning of the driver, but it
> is likely that a user will want to create a
On Sun, Mar 29, 2020 at 10:53 PM Alastair D'Silva wrote:
>
> These values have been taken from the device specifications.
Link to specification?
From: Jiri Olsa
Adding expr_scanner_ctx object to hold user data
for the expr scanner. Currently it holds only
start_token, Kajol Jain will use it to hold 24x7
runtime param.
Signed-off-by: Jiri Olsa
---
tools/perf/util/expr.c | 6 --
tools/perf/util/expr.h | 4
From: Jiri Olsa
Adding expr_ prefix for parse_ctx and parse_id,
to straighten out the expr* namespace.
There's no functional change.
Signed-off-by: Jiri Olsa
---
tools/perf/tests/expr.c | 4 ++--
tools/perf/util/expr.c| 10 +-
tools/perf/util/expr.h| 12
On 01/04/20 7:30 PM, Pingfan Liu wrote:
> 'mem=" option is an easy way to put high pressure on memory during some
> test. Hence after applying the memory limit, instead of total mem, the
> actual usable memory should be considered when reserving mem for
> crashkernel. Otherwise the boot up may
The routine hugetlb_add_hstate prints a warning if the hstate already
exists. This was originally done as part of kernel command line
parsing. If 'hugepagesz=' was specified more than once, the warning
pr_warn("hugepagesz= specified twice, ignoring\n");
would be printed.
Some
Patchset adds json file metric support for the hv_24x7 socket/chip level
events. "hv_24x7" pmu interface events needs system dependent parameter
like socket/chip/core. For example, hv_24x7 chip level events needs
specific chip-id to which the data is requested should be added as part
of pmu
Now that architectures provide arch_hugetlb_valid_size(), parsing
of "hugepagesz=" can be done in architecture independent code.
Create a single routine to handle hugepagesz= parsing and remove
all arch specific routines. We can also remove the interface
hugetlb_bad_size() as this is no longer
On Wed, Apr 1, 2020 at 1:49 AM Dan Williams wrote:
>
> On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva
> wrote:
> >
> > This driver exposes LPC memory on OpenCAPI pmem cards
> > as an NVDIMM, allowing the existing nvram infrastructure
> > to be used.
> >
> > Namespace metadata is stored on
Patch enhances current metric infrastructure to handle "?" in the metric
expression. The "?" can be use for parameters whose value not known while
creating metric events and which can be replace later at runtime to
the proper value. It also add flexibility to create multiple events out
of single
v2 -
Fix build errors with patch 1 (Will)
Change arch_hugetlb_valid_size arg to unsigned long and remove
irrelevant 'extern' keyword (Christophe)
Documentation and other misc changes (Randy, Christophe, Mina)
Do not process command line options if !hugepages_supported()
This patch refactor metricgroup__add_metric function where
some part of it move to function metricgroup__add_metric_param.
No logic change.
Signed-off-by: Kajol Jain
---
tools/perf/util/metricgroup.c | 60 ---
1 file changed, 35 insertions(+), 25 deletions(-)
On Tue, Mar 31, 2020 at 7:51 PM Segher Boessenkool
wrote:
>
> On Tue, Mar 31, 2020 at 08:56:23AM +0200, Christophe Leroy wrote:
> > While we are at it, can we also remove the 601 ? This one is also full
> > of workarounds and diverges a bit from other 6xx.
> >
> > I'm unable to find its end of
For each user space send window, register NX with fault window ID
and port value so that NX paste CRBs in this fault FIFO when it
sees fault on the request buffer.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 15
Process can not close send window until all requests are processed.
Means wait until window state is not busy and send credits are
returned. Display debug messages in case taking longer to close the
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 28
Power9 processor supports Virtual Accelerator Switchboard (VAS) which
allows kernel and userspace to send compression requests to Nest
Accelerator (NX) directly. The NX unit comprises of 2 842 compression
engines and 1 GZIP engine. Linux kernel already has 842 compression
support on kernel. This
Make setup and enable code generic to support new GZIP compression type.
Changed nx842 reference to nx and moved some code to new functions.
Functionality is not changed except sparse warning fix - setting NULL
instead of 0 for per_cpu send window in nx_delete_coprocs().
Signed-off-by: Haren
> -Original Message-
> From: Dan Williams
> Sent: Wednesday, 1 April 2020 7:48 PM
> To: Alastair D'Silva
> Cc: Aneesh Kumar K . V ; Oliver O'Halloran
> ; Benjamin Herrenschmidt
> ; Paul Mackerras ; Michael
> Ellerman ; Frederic Barrat ;
> Andrew Donnellan ; Arnd Bergmann
> ; Greg
Hi all,
On Fri, 6 Mar 2020 10:21:58 +1100 Stephen Rothwell
wrote:
>
> Today's linux-next merge of the net-next tree got a conflict in:
>
> fs/sysfs/group.c
>
> between commit:
>
> 9255782f7061 ("sysfs: Wrap __compat_only_sysfs_link_entry_to_kobj function
> to change the symlink name")
>
Hello Peter,
On Wed, 2020-04-01 at 11:26 +0200, Peter Zijlstra wrote:
> You might want to add a note to your asm/spinlock.h that you rely on
> spin_unlock() unconditionally clearing a lock.
>
> This isn't naturally true for all lock implementations. Consider ticket
> locks, doing a surplus
On Wed, 2020-04-01 at 01:49 -0700, Dan Williams wrote:
> On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva
> wrote:
> > This patch emits a message showing how much LPC memory & special purpose
> > memory was detected on an OCXL device.
[]
> > diff --git a/drivers/misc/ocxl/config.c
NX may be processing requests while trying to close window. Wait until
all credits are returned and then free send window from VAS instance.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git
Initialize send and receive window attributes for GZIP high and
normal priority types.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas-window.c
Changes to probe GZIP device-tree nodes, open RX windows and setup
GZIP compression type. No plans to provide GZIP usage in kernel right
now, but this patch enables GZIP for user space usage.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-powernv.c | 43
(Sorry for reposting. version number is missed in subject)
Make setup and enable code generic to support new GZIP compression type.
Changed nx842 reference to nx and moved some code to new functions.
Functionality is not changed except sparse warning fix - setting NULL
instead of 0 for per_cpu
(sorry reposting. version string missed)
When process opens a window, its pid and tgid will be saved in the
vas_window struct. This window will be closed when the process exits.
The kernel handles NX faults by updating CSB or send SEGV signal to pid
of the process if the user space csb addr is
On Wed, Apr 1, 2020 at 9:32 PM Balamuruhan S wrote:
>
> On Fri, 2020-03-20 at 16:17 +1100, Jordan Niethe wrote:
> > Currently unsigned ints are used to represent instructions on powerpc.
> > This has worked well as instructions have always been 4 byte words.
> > However, a future ISA version will
When NX encounters translation error on CRB and any request buffer,
raises an interrupt on the CPU to handle the fault. It can raise one
interrupt for multiple faults. Expects OS to handle these faults and
return credits for fault window after processing faults.
Setup thread IRQ handler and IRQ
coproc entry is initialized during NX probe on power9, but not on P8.
nx842_delete_coprocs() is used for both and frees receive window if it
is allocated. Getting crash for rmmod on P8 since coproc->vas.rxwin
is not initialized.
This patch replaces kmalloc with kzalloc in nx842_powernv_probe()
Power9 introduced Virtual Accelerator Switchboard (VAS) which allows
user space to communicate with Nest Accelerator (NX) directly. But
kernel has to establish channel to NX for user space. This document
describes user space API that application can use to establish
communication channel.
When process opens a window, its pid and tgid will be saved in the
vas_window struct. This window will be closed when the process exits.
The kernel handles NX faults by updating CSB or send SEGV signal to pid
of the process if the userspace csb addr is invalid.
In multi-thread applications, a
System checkstops if RxFIFO overruns with more requests than the
maximum possible number of CRBs allowed in FIFO at any time. So
max credits value (rxattr.wcreds_max) is set and is passed to
vas_rx_win_open() by the the driver.
Signed-off-by: Haren Myneni
---
From: Peter Zijlstra
In the CPU-offline process, it calls mmdrop() after idle entry and the
subsequent call to cpuhp_report_idle_dead(). Once execution passes the
call to rcu_report_dead(), RCU is ignoring the CPU, which results in
lockdep complaining when mmdrop() uses RCU from either memcg or
Define the VAS_TX_WIN_OPEN ioctl interface for NX GZIP access
from user space. This interface is used to open GZIP send window and
mmap region which can be used by user space to send requests to NX
directly with copy/paste instructions.
Signed-off-by: Haren Myneni
---
When window is opened, pid reference is taken for user space
windows. Not needed for kernel windows. So remove 'pid' in
vas_tx_win_attr struct.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
arch/powerpc/include/asm/vas.h| 1 -
drivers/crypto/nx/nx-common-powernv.c | 1 -
2
On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva wrote:
>
> This patch reads timeouts & firmware version from the controller, and
> uses those timeouts to wait for the controller to report that it is ready
> before handing the memory over to libnvdimm.
>
> Signed-off-by: Alastair D'Silva
> ---
Setup fault window for each VAS instance. When NX gets a fault on
request buffer, pastes fault CRB in the corresponding fault FIFO and
then raises an interrupt to the OS. The kernel handles this fault
and process faults CRB from this FIFO.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by:
Allocate a xive irq on each chip with a vas instance. The NX coprocessor
raises a host CPU interrupt via vas if it encounters page fault on user
space request buffer. Subsequent patches register the trigger port with
the NX coprocessor, and create a vas fault handler for this interrupt
mapping.
Kernel sets fault address and status in CRB for NX page fault on user
space address after processing page fault. User space gets the signal
and handles the fault mentioned in CRB by bringing the page in to
memory and send NX request again.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by:
This function allocates IRQ on a specific chip. VAS needs per chip
IRQ allocation and will have IRQ handler per VAS instance.
Signed-off-by: Haren Myneni
Reviewed-by: Cédric Le Goater
---
arch/powerpc/include/asm/xive.h | 9 -
arch/powerpc/sysdev/xive/native.c | 6 +++---
2 files
Applications polls on CSB for the status update after requests are
issued. NX process these requests and update the CSB with the status.
If it encounters translation error, pastes CRB in fault FIFO and
raises an interrupt. The kernel handles fault by reading CRB from
fault FIFO and process the
On power9, user space can send GZIP compression requests directly to NX
once kernel establishes NX channel / window with VAS. This patch provides
user space API which allows user space to establish channel using open
VAS_TX_WIN_OPEN ioctl, mmap and close operations.
Each window corresponds to
On Tue, 31 Mar 2020 15:12:46 +1100
Sam Bobroff wrote:
> Older versions of skiboot only provide a single value in the device
> tree property "ibm,mmio-atsd", even when multiple Address Translation
> Shoot Down (ATSD) registers are present. This prevents NVLink2 devices
> (other than the first)
> -Original Message-
> From: Dan Williams
> Sent: Wednesday, 1 April 2020 7:48 PM
> To: Alastair D'Silva
> Cc: Aneesh Kumar K . V ; Oliver O'Halloran
> ; Benjamin Herrenschmidt
> ; Paul Mackerras ; Michael
> Ellerman ; Frederic Barrat ;
> Andrew Donnellan ; Arnd Bergmann
> ; Greg
NX uses credit mechanism to control the number of requests issued on
a specific window at any point of time. Only send windows and fault
window are used credits. When the request is issued on a given window,
a credit is taken. This credit will be returned after that request is
processed. If
Dump FIFO entries if could not find send window and print CRB
for debugging.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 41 ++
1 file changed, 41 insertions(+)
diff --git
On 3/20/20 4:31 PM, Ganesh Goudar wrote:
MCE handling on pSeries platform fails as recent rework to use common
code for pSeries and PowerNV in machine check error handling tries to
access per-cpu variables in realmode. The per-cpu variables may be
outside the RMO region on pSeries platform and
Rename nx-842-powernv.c to nx-common-powernv.c to add code for setup
and enable new GZIP compression type. The actual functionality is not
changed in this patch.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/Makefile|2 +-
On Sun, Mar 29, 2020 at 10:53 PM Alastair D'Silva wrote:
>
> This patch introduces a character device (/dev/ocxlpmemX) which further
> patches will use to interact with userspace, such as error logs,
> controller stats and card debug functionality.
This was asked earlier, but I'll reiterate, I
On Tue, Mar 31, 2020 at 1:59 AM Alastair D'Silva wrote:
>
> Some of the interrupts that the card generates are better handled
> by the userspace daemon, in particular:
> Controller Hardware/Firmware Fatal
> Controller Dump Available
> Error Log available
>
> This patch allows a userspace
"Alastair D'Silva" writes:
>> -Original Message-
>> From: Dan Williams
>>
>> On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva
>> wrote:
>> >
>> > This series adds support for OpenCAPI Persistent Memory devices on
>> > bare metal (arch/powernv), exposing them as nvdimms so that we can
On Thu, Apr 2, 2020 at 2:42 PM Michael Ellerman wrote:
>
> "Alastair D'Silva" writes:
> >> -Original Message-
> >> From: Dan Williams
> >>
> >> On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva
> >> wrote:
> >> >
> >> > *snip*
> >> Are OPAL calls similar to ACPI DSMs? I.e. methods for
> -Original Message-
> From: Dan Williams
> Sent: Wednesday, 1 April 2020 7:48 PM
> To: Alastair D'Silva
> Cc: Aneesh Kumar K . V ; Oliver O'Halloran
> ; Benjamin Herrenschmidt
> ; Paul Mackerras ; Michael
> Ellerman ; Frederic Barrat ;
> Andrew Donnellan ; Arnd Bergmann
> ; Greg
"Naveen N. Rao" writes:
> Balamuruhan S wrote:
>> Few ppc instructions are encoded in test_emulate_step.c, consolidate them to
>> ppc-opcode.h, fix redefintion errors in bpf_jit caused due to this
>> consolidation.
>> Reuse the macros from ppc-opcode.h
...
>> diff --git
> -Original Message-
> From: Dan Williams
> Sent: Wednesday, 1 April 2020 7:49 PM
> To: Alastair D'Silva
> Cc: Aneesh Kumar K . V ; Oliver O'Halloran
> ; Benjamin Herrenschmidt
> ; Paul Mackerras ; Michael
> Ellerman ; Frederic Barrat ;
> Andrew Donnellan ; Arnd Bergmann
> ; Greg
Hi Leonardo,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on tip/locking/core]
[also build test ERROR on powerpc/next paulus-powerpc/kvm-ppc-next v5.6
next-20200401]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system
On Tue, Mar 31, 2020 at 7:33 AM Vaibhav Jain wrote:
>
> Implement support for fetching nvdimm health information via
> H_SCM_HEALTH hcall as documented in Ref[1]. The hcall returns a pair
> of 64-bit big-endian integers which are then stored in 'struct
> papr_scm_priv' and subsequently partially
generic-64bit_defconfig
x86_64 randconfig-a001-20200401
x86_64 randconfig-a002-20200401
x86_64 randconfig-a003-20200401
i386 randconfig-a001-20200401
i386 randconfig-a002-20200401
i386
pariscgeneric-64bit_defconfig
x86_64 randconfig-a001-20200401
x86_64 randconfig-a002-20200401
x86_64 randconfig-a003-20200401
i386 randconfig-a001-20200401
i386 randconfig-a002-20200401
i386
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