On Wed, 2020-03-11 at 08:01 +0100, Christophe Leroy wrote:
>
> Le 11/03/2020 à 07:14, Balamuruhan S a écrit :
> > ld instruction should have 14 bit immediate field (DS) concatenated
> > with
> > 0b00 on the right, encode it accordingly.
> >
> > Fixes: 4ceae137bdab ("powerpc: emulate_step() tests
On Wed, Mar 11, 2020 at 6:07 AM Joe Perches wrote:
>
> Convert the various uses of fallthrough comments to fallthrough;
>
> Done via script
> Link:
> https://lore.kernel.org/lkml/b56602fcf79f849e733e7b521bb0e17895d390fa.1582230379.git.joe.com/
>
> Signed-off-by: Joe Perches
Acked-by: Arnd
introduce macro `IMM_DS()` to encode DS form instructions with
14 bit immediate field.
Signed-off-by: Balamuruhan S
---
arch/powerpc/lib/test_emulate_step.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/lib/test_emulate_step.c
ld instruction should have 14 bit immediate field (DS) concatenated with
0b00 on the right, encode it accordingly.
Fixes: 4ceae137bdab ("powerpc: emulate_step() tests for load/store
instructions")
Reviewed-by: Sandipan Das
Signed-off-by: Balamuruhan S
---
arch/powerpc/lib/test_emulate_step.c
Russell Currey writes:
> From: Christophe Leroy
>
> In addition to the set_memory_xx() functions which allows to change
> the memory attributes of not (yet) used memory regions, implement a
> set_memory_attr() function to:
> - set the final memory protection after init on currently used
>
Russell Currey writes:
> The set_memory_{ro/rw/nx/x}() functions are required for STRICT_MODULE_RWX,
> and are generally useful primitives to have. This implementation is
> designed to be completely generic across powerpc's many MMUs.
>
> It's possible that this could be optimised to be faster
On 11/03/2020 17:09, Aneesh Kumar K.V wrote:
> Vaibhav Jain writes:
>
>> Recently we discovered an issue on pseries guests that prevents pci
>> devices from accessing pmem memory via DMA. Performing such an
>> operation will cause PHB to freeze the corresponding partition
>> endpoint and in
Vaibhav Jain writes:
> Recently we discovered an issue on pseries guests that prevents pci
> devices from accessing pmem memory via DMA. Performing such an
> operation will cause PHB to freeze the corresponding partition
> endpoint and in some scenarios will shutdown the disk that hosts the
>
Le 11/03/2020 à 07:14, Balamuruhan S a écrit :
ld instruction should have 14 bit immediate field (DS) concatenated with
0b00 on the right, encode it accordingly.
Fixes: 4ceae137bdab ("powerpc: emulate_step() tests for load/store
instructions")
Reviewed-by: Sandipan Das
Signed-off-by:
Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit. Fix it by replacing with scnprintf().
Signed-off-by: Takashi Iwai
---
drivers/hwmon/ibmpowernv.c | 8
1 file changed, 4 insertions(+), 4
On Thu, 2020-03-05 at 14:11 +1100, Andrew Donnellan wrote:
> On 21/2/20 2:27 pm, Alastair D'Silva wrote:
> > From: Alastair D'Silva
> >
> > These IOCTLs provide low level access to the card to aid in
> > debugging
> > controller/FPGA firmware.
> >
> > Signed-off-by: Alastair D'Silva
> > ---
>
On Wed, Mar 11, 2020 at 06:08:15PM -0500, Scott Cheloha wrote:
> At memory hot-remove time we can retrieve an LMB's nid from its
> corresponding memory_block. There is no need to store the nid
> in multiple locations.
>
> Signed-off-by: Scott Cheloha
> ---
> The linear search in powerpc's
Tyrel Datwyler writes:
> On 3/10/20 10:25 AM, Nathan Lynch wrote:
>> Tyrel Datwyler writes:
>>> The expectation is that when calling of_read_drc_info_cell()
>>> repeatedly to parse multiple drc-info records that the in/out curval
>>> parameter points at the start of the next record on return.
Dan Williams writes:
> The "sub-section memory hotplug" facility allows memremap_pages() users
> like libnvdimm to compensate for hardware platforms like x86 that have a
> section size larger than their hardware memory mapping granularity. The
> compensation that sub-section support affords is
On Wed, 2020-03-04 at 16:21 +0100, Frederic Barrat wrote:
>
> Le 21/02/2020 à 04:27, Alastair D'Silva a écrit :
> > From: Alastair D'Silva
> >
> > These IOCTLs provide low level access to the card to aid in
> > debugging
> > controller/FPGA firmware.
> >
> > Signed-off-by: Alastair D'Silva
>
On Thu, 2020-03-05 at 11:46 +1100, Andrew Donnellan wrote:
> On 21/2/20 2:27 pm, Alastair D'Silva wrote:
> > From: Alastair D'Silva
> >
> > The controller can report a number of statistics that are useful
> > in evaluating the performance and reliability of the card.
> >
> > This patch exposes
* Michal Hocko [2020-03-11 12:57:35]:
> On Wed 11-03-20 16:32:35, Srikar Dronamraju wrote:
> > A Powerpc system with multiple possible nodes and with CONFIG_NUMA
> > enabled always used to have a node 0, even if node 0 does not any cpus
> > or memory attached to it. As per PAPR, node affinity of
... and rename it to memhp_default_online_type. This is a preparation
for more detailed default online behavior.
Cc: Greg Kroah-Hartman
Cc: Andrew Morton
Cc: Michal Hocko
Cc: Oscar Salvador
Cc: "Rafael J. Wysocki"
Cc: Baoquan He
Cc: Wei Yang
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Some opencapi FPGA images allow to control if the FPGA should be reloaded
on the next adapter reset. If it is supported, the image specifies it
through a Vendor Specific DVSEC in the config space of function 0.
This patch adds an interface to sysfs to control that behavior, if possible.
On Wed, Mar 11, 2020 at 01:30:24PM +0100, David Hildenbrand wrote:
>Let's use a simple array which we can reuse soon. While at it, move the
>string->mmop conversion out of the device hotplug lock.
>
>Cc: Greg Kroah-Hartman
>Cc: Andrew Morton
>Cc: Michal Hocko
>Cc: Oscar Salvador
>Cc: "Rafael
From: "Gautham R. Shenoy"
Add documentation for the following sysfs interfaces:
/sys/devices/system/cpu/cpuX/purr
/sys/devices/system/cpu/cpuX/spurr
/sys/devices/system/cpu/cpuX/idle_purr
/sys/devices/system/cpu/cpuX/idle_spurr
Signed-off-by: Gautham R. Shenoy
---
ld instruction should have 14 bit immediate field (DS) concatenated with
0b00 on the right, encode it accordingly. Introduce macro `IMM_DS()`
to encode DS form instructions with 14 bit immediate field.
Fixes: 4ceae137bdab ("powerpc: emulate_step() tests for load/store
instructions")
Reviewed-by:
A Powerpc system with multiple possible nodes and with CONFIG_NUMA
enabled always used to have a node 0, even if node 0 does not any cpus
or memory attached to it. As per PAPR, node affinity of a cpu is only
available once its present / online. For all cpus that are possible but
not present,
On Wed, Mar 11, 2020 at 08:39:44AM +0100, Takashi Iwai wrote:
> Since snprintf() returns the would-be-output size instead of the
> actual output size, the succeeding calls may go beyond the given
> buffer limit. Fix it by replacing with scnprintf().
>
> Signed-off-by: Takashi Iwai
Applied to
On 11.03.20 15:26, Wei Yang wrote:
> On Wed, Mar 11, 2020 at 01:30:26PM +0100, David Hildenbrand wrote:
>> For now, distributions implement advanced udev rules to essentially
>> - Don't online any hotplugged memory (s390x)
>> - Online all memory to ZONE_NORMAL (e.g., most virt environments like
>>
Distributions nowadays use udev rules ([1] [2]) to specify if and
how to online hotplugged memory. The rules seem to get more complex with
many special cases. Due to the various special cases,
CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE cannot be used. All memory hotplug
is handled via udev rules.
On Wed, Mar 11, 2020 at 01:30:22PM +0100, David Hildenbrand wrote:
>The name is misleading. Let's just name it like the online_type name we
>expose to user space ("online").
>
>Add some documentation to the types.
>
>Cc: Greg Kroah-Hartman
>Cc: Andrew Morton
>Cc: Michal Hocko
>Cc: Oscar
On Wed, Mar 11, 2020 at 02:20:02PM +, Wei Yang wrote:
>On Wed, Mar 11, 2020 at 01:30:24PM +0100, David Hildenbrand wrote:
>>Let's use a simple array which we can reuse soon. While at it, move the
>>string->mmop conversion out of the device hotplug lock.
>>
>>Cc: Greg Kroah-Hartman
>>Cc:
I have no idea why we have to start at -1. Just treat 0 as the special
case. Clarify a comment (which was wrong, when we come via
device_online() the first time, the online_type would have been 0 /
MEM_ONLINE). The default is now always MMOP_OFFLINE.
This is a preparation to use the online_type
For now, distributions implement advanced udev rules to essentially
- Don't online any hotplugged memory (s390x)
- Online all memory to ZONE_NORMAL (e.g., most virt environments like
hyperv)
- Online all memory to ZONE_MOVABLE in case the zone imbalance is taken
care of (e.g., bare metal,
On Wed, Mar 11, 2020 at 01:30:25PM +0100, David Hildenbrand wrote:
>... and rename it to memhp_default_online_type. This is a preparation
>for more detailed default online behavior.
>
>Cc: Greg Kroah-Hartman
>Cc: Andrew Morton
>Cc: Michal Hocko
>Cc: Oscar Salvador
>Cc: "Rafael J. Wysocki"
On Wed, Mar 11, 2020 at 01:30:23PM +0100, David Hildenbrand wrote:
>I have no idea why we have to start at -1. Just treat 0 as the special
>case. Clarify a comment (which was wrong, when we come via
>device_online() the first time, the online_type would have been 0 /
>MEM_ONLINE). The default is
On Wed, Mar 11, 2020 at 01:30:26PM +0100, David Hildenbrand wrote:
>For now, distributions implement advanced udev rules to essentially
>- Don't online any hotplugged memory (s390x)
>- Online all memory to ZONE_NORMAL (e.g., most virt environments like
> hyperv)
>- Online all memory to
This adds tests which will validate architecture page table helpers and
other accessors in their compliance with expected generic MM semantics.
This will help various architectures in validating changes to existing
page table helpers or addition of new ones.
This test covers basic page table
Let's use a simple array which we can reuse soon. While at it, move the
string->mmop conversion out of the device hotplug lock.
Cc: Greg Kroah-Hartman
Cc: Andrew Morton
Cc: Michal Hocko
Cc: Oscar Salvador
Cc: "Rafael J. Wysocki"
Cc: Baoquan He
Cc: Wei Yang
Signed-off-by: David Hildenbrand
From: "Gautham R. Shenoy"
Currently when CPU goes idle, we take a snapshot of PURR via
pseries_idle_prolog() which is used at the CPU idle exit to compute
the idle PURR cycles via the function pseries_idle_epilog(). Thus,
the value of idle PURR cycle thus read before pseries_idle_prolog() and
From: "Gautham R. Shenoy"
Currently purr, spurr, idle_purr, idle_spurr are exposed for every CPU
via the sysfs interface
/sys/devices/system/cpu/cpuX/[idle_][s]purr. Each sysfs read currently
generates an IPI to obtain the desired value from the target CPU X.
Since these aforementioned sysfs
From: "Gautham R. Shenoy"
Hi,
This is the third version of the patches to track and expose idle PURR
and SPURR ticks. These patches are required by tools such as lparstat
to compute system utilization for capacity planning purposes.
The previous versions can be found here:
v2:
Linux kernel configured with CONFIG_NUMA on a system with multiple
possible nodes, marks node 0 as online at boot. However in practice,
there are systems which have node 0 as memoryless and cpuless.
This can cause
1. numa_balancing to be enabled on systems with only one online node.
2. Existence
Currently Linux kernel with CONFIG_NUMA on a system with multiple
possible nodes, marks node 0 as online at boot. However in practice,
there are systems which have node 0 as memoryless and cpuless.
This can cause numa_balancing to be enabled on systems with only one node
with memory and CPUs.
From: "Gautham R. Shenoy"
On Pseries LPARs, to calculate utilization, we need to know the
[S]PURR ticks when the CPUs were busy or idle.
Via pseries_idle_prolog(), pseries_idle_epilog(), we track the idle
PURR ticks in the VPA variable "wait_state_cycles". This patch extends
the support to
Node id queried from the static device tree may not
be correct. For example: it may always show 0 on a shared processor.
Hence prefer the node id queried from vphn and fallback on the device tree
based node id if vphn query fails.
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux...@kvack.org
Cc:
On Wed 11-03-20 16:32:35, Srikar Dronamraju wrote:
> A Powerpc system with multiple possible nodes and with CONFIG_NUMA
> enabled always used to have a node 0, even if node 0 does not any cpus
> or memory attached to it. As per PAPR, node affinity of a cpu is only
> available once its present /
From: "Gautham R. Shenoy"
On Pseries LPARs, to calculate utilization, we need to know the
[S]PURR ticks when the CPUs were busy or idle.
The total PURR and SPURR ticks are already exposed via the per-cpu
sysfs files "purr" and "spurr". This patch adds support for exposing
the idle PURR and
The name is misleading. Let's just name it like the online_type name we
expose to user space ("online").
Add some documentation to the types.
Cc: Greg Kroah-Hartman
Cc: Andrew Morton
Cc: Michal Hocko
Cc: Oscar Salvador
Cc: "Rafael J. Wysocki"
Cc: Baoquan He
Cc: Wei Yang
Signed-off-by:
From: "Gautham R. Shenoy"
Currently prior to entering an idle state on a Linux Guest, the
pseries cpuidle driver implement an idle_loop_prolog() and
idle_loop_epilog() functions which ensure that idle_purr is correctly
computed, and the hypervisor is informed that the CPU cycles have been
On Sun, 2020-03-08 at 20:57 -0400, Nayna Jain wrote:
> From: Nayna Jain
>
> Every time a new architecture defines the IMA architecture specific
> functions - arch_ima_get_secureboot() and arch_ima_get_policy(), the IMA
> include file needs to be updated. To avoid this "noise", this patch
>
On 11.03.20 17:55, Vitaly Kuznetsov wrote:
> David Hildenbrand writes:
>
>> For now, distributions implement advanced udev rules to essentially
>> - Don't online any hotplugged memory (s390x)
>> - Online all memory to ZONE_NORMAL (e.g., most virt environments like
>> hyperv)
>> - Online all
Hi Kim,
On 3/6/20 3:36 AM, Kim Phillips wrote:
On 3/3/20 3:55 AM, Kim Phillips wrote:
On 3/2/20 2:21 PM, Stephane Eranian wrote:
On Mon, Mar 2, 2020 at 2:13 AM Peter Zijlstra wrote:
On Mon, Mar 02, 2020 at 10:53:44AM +0530, Ravi Bangoria wrote:
Modern processors export such hazard data in
David Hildenbrand writes:
> For now, distributions implement advanced udev rules to essentially
> - Don't online any hotplugged memory (s390x)
> - Online all memory to ZONE_NORMAL (e.g., most virt environments like
> hyperv)
> - Online all memory to ZONE_MOVABLE in case the zone imbalance is
On Sun, 8 Mar 2020 20:57:51 -0400
Nayna Jain wrote:
> From: Nayna Jain
>
> Every time a new architecture defines the IMA architecture specific
> functions - arch_ima_get_secureboot() and arch_ima_get_policy(), the IMA
> include file needs to be updated. To avoid this "noise", this patch
>
On Wed, 2020-03-04 at 10:25 +0100, Frederic Barrat wrote:
>
> Le 21/02/2020 à 04:27, Alastair D'Silva a écrit :
> > From: Alastair D'Silva
> >
> > The controller can report a number of statistics that are useful
> > in evaluating the performance and reliability of the card.
> >
> > This patch
At memory hot-remove time we can retrieve an LMB's nid from its
corresponding memory_block. There is no need to store the nid
in multiple locations.
Signed-off-by: Scott Cheloha
---
The linear search in powerpc's memory_add_physaddr_to_nid() has become a
bottleneck at boot on systems with many
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