core_idle_state is maintained for each core. It uses 0-7 bits to track
whether a thread in the core has entered fastsleep or winkle. 8th bit is
used as a lock bit.
The lock bit is set in these 2 scenarios-
- The thread is first in subcore to wakeup from sleep/winkle.
- If its the last thread in t
On Tue, Jun 30, 2015 at 07:18:04PM +0100, Grant Likely wrote:
>On Thu, 4 Jun 2015 16:42:11 +1000
>, Gavin Shan
> wrote:
>> The patch intends to add standalone driver to support PCI hotplug
>> for PowerPC PowerNV platform, which runs on top of skiboot firmware.
>> The firmware identified hotplugga
On Tue, 2015-06-30 at 10:48 +, Joseph Myers wrote:
> On Tue, 30 Jun 2015, Michael Ellerman wrote:
>
> > Is there some way you can imagine of splitting this up into smaller chunks,
> > so
> > that different arches can merge the pieces separately?
>
> Well, it could be split as:
>
> 1. Rename
On Tue, 2015-06-30 at 19:06 +0100, Grant Likely wrote:
> It may be time to dump the special allocation of fdt.c entirely and
> treat all nodes the same way, with name and properties all allocated
> with normal kmallocs Investigation is needed to figure out if this
> is feasible.
kmalloc isn't
I'm trying to move the 3 microcode patches included in
arch/powerpc/sysdev/micropatch.c into the firmware directory in order to
use request_firmware() and then be able to add additional micropatch
that I need to relocate SMC2 on my MPC885.
I have written the below patch in order to test the pr
On Thu, 4 Jun 2015 16:42:08 +1000
, Gavin Shan
wrote:
> unflatten_dt_node() is called recursively to unflatten FDT nodes
> with the assumption that FDT blob has only one root node, which
> isn't true when the FDT blob represents device sub-tree. The
> patch improves the function to supporting de
On Thu, 4 Jun 2015 16:42:09 +1000
, Gavin Shan
wrote:
> The patch introduces one more argument to of_fdt_unflatten_tree()
> to specify the root node for the FDT blob, which is going to be
> unflattened. In the result, the function can be used to unflatten
> FDT blob, which represents device sub-
On Thu, 4 Jun 2015 16:42:11 +1000
, Gavin Shan
wrote:
> The patch intends to add standalone driver to support PCI hotplug
> for PowerPC PowerNV platform, which runs on top of skiboot firmware.
> The firmware identified hotpluggable slots and marked their device
> tree node with proper "ibm,slot-
On Tue, 30 Jun 2015 17:54:14 +0530
Nikunj A Dadhania wrote:
>
> disk-label: add support for booting from GPT FAT partition
>
> For a GPT+LVM combination disk, older bootloader that does not support
> LVM, cannot load kernel from LVM.
>
> The patch adds support to read fr
On 6/30/2015 11:01 AM, Grant Likely wrote:
> Merged, thanks.
Thanks!
> Jeremy, please check your mailer configuration. The patch was mangled
> and would not apply. I had to fix it up manually.
Sorry about that, I will see about creating a better setup (aka not
gmail/web
client) f
On Tue, 30 Jun 2015 13:23:33 +1000
, Benjamin Herrenschmidt
wrote:
> On Mon, 2015-06-29 at 18:50 -0500, Jeremy Linton wrote:
> > This is a reformat of the patch attached to "pSeries boot failure due
> > to wrong interrupt controller".
> >
> > It allows of_irq_parse_raw() to return the node point
On the 8xx, load latency is 2 cycles and taking branches also takes
2 cycles. So let's unroll the loop.
Signed-off-by: Christophe Leroy
---
arch/powerpc/lib/checksum_32.S | 16 +++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/lib/checksum_32.S b/arch/po
r5 does contain the value to be updated, so lets use r5 all way long
for that. It makes the code more readable.
To avoid confusion, it is better to use adde instead of addc
The first addition is useless. Its only purpose is to clear carry.
As r4 is a signed int that is always positive, this can b
The purpose of this patchset is to optimise csum_partial() on powerpc32.
In the first part, we remove some unneccessary instructions
In the second part, we partially unloop the main loop
Christophe Leroy (2):
Optimise a few instructions in csum_partial()
Optimise csum_partial() loop
arch/pow
On PPC_8xx, lwz has a 2 cycles latency, and branching also takes
2 cycles. On some other powerpc, lwz has 3 cycles.
As the size of the header is minimum 5 words, we can unroll the loop
for the first words to reduce number of branching, and we can re-order
the instructions to limit loading latency.
Thomas Huth writes:
> Sorry, every time I look at this gpt stuff, my eyes stumble
> over something new ...
No worries :-)
> On Tue, 30 Jun 2015 16:31:21 +0530
> Nikunj A Dadhania wrote:
>
>> For a GPT+LVM combination disk, older bootloader that does not support
>> LVM, cannot load kernel from
Sorry, every time I look at this gpt stuff, my eyes stumble
over something new ...
On Tue, 30 Jun 2015 16:31:21 +0530
Nikunj A Dadhania wrote:
> For a GPT+LVM combination disk, older bootloader that does not support
> LVM, cannot load kernel from LVM.
>
> The patch adds support to read from BA
For a GPT+LVM combination disk, older bootloader that does not support
LVM, cannot load kernel from LVM.
The patch adds support to read from BASIC_DATA UUID partitions for the
case that the OS installer has installed the CHRP-BOOT config on a FAT
file system.
Makes GPT detection robust
* Check fo
Signed-off-by: Nikunj A Dadhania
Reviewed-by: Thomas Huth
---
slof/fs/packages/disk-label.fs | 17 +
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/slof/fs/packages/disk-label.fs b/slof/fs/packages/disk-label.fs
index e5a0546..347dc5d 100644
--- a/slof/fs/packages/
"block" word is not a block number, actually its an allocated host
address. Rename it to disk-buf along with a associated
size(disk-buf-size=4096) for using during allocation/free.
Also renaming the helper routine read-sector to read-disk-buf. This
routine assumes the address to be disk-buf and o
Signed-off-by: Nikunj A Dadhania
Reviewed-by: Thomas Huth
---
slof/fs/little-endian.fs | 6 ++
slof/fs/packages/disk-label.fs | 4 ++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/slof/fs/little-endian.fs b/slof/fs/little-endian.fs
index f2e4e8d..6b4779e 100644
--- a
Signed-off-by: Nikunj A Dadhania
Reviewed-by: Thomas Huth
---
slof/fs/packages/disk-label.fs | 41 +++--
1 file changed, 15 insertions(+), 26 deletions(-)
diff --git a/slof/fs/packages/disk-label.fs b/slof/fs/packages/disk-label.fs
index fe1c25e..f1f083a 1006
Following patchset implements some improvements and cleanup for the
GPT booting code:
patch 1: Simplify the gpt detection code with lesser scopes and add
comments.
patch 2: Introduce 8byte LE helpers: x@-le and x!-le
patch 3: Rename block / read-sector to indicate it a allocated buffer
On Tue, 30 Jun 2015, Michael Ellerman wrote:
> Is there some way you can imagine of splitting this up into smaller chunks, so
> that different arches can merge the pieces separately?
Well, it could be split as:
1. Rename include/math-emu to math-emu-old and update architectures for
the renaming
The kernel now supports SW based branch filters for book3s systems with
some specific requirements while dealing with HW supported branch filters
in order to achieve overall OR semantics prevailing in perf branch stack
sampling framework. This patch adapts the BHRB branch filter configuration
to me
This patch simply changes the name of the variable from 'bhrb_filter' to
'bhrb_hw_filter' in order to add one more variable which will track SW
filters in generic powerpc book3s code which will be implemented in the
subsequent patch. This patch does not change any functionality.
Signed-off-by: Ans
'commit 9de5cb0f6df8 ("powerpc/perf: Add per-event excludes on Power8")'
broke the PMU based BHRB privilege level filter. BHRB depends on the
same MMCR0 bits for privilege level filter which was used to freeze all
the PMCs as a group. Once we moved to individual event based privilege
filters throug
This patch adds a test for verifying that all the branch stack
sampling filters supported on powerpc work correctly. It also
adds some assembly helper functions in this regard. This patch
extends the generic event description to handle kernel mapped
ring buffers.
Signed-off-by: Anshuman Khandual
This patch enables SW based post processing of BHRB captured branches
to be able to meet more user defined branch filtration criteria in perf
branch stack sampling framework. These changes increase the number of
branch filters and their valid combinations on any powerpc64 server
platform with BHRB
This patch cleans up some existing indentation problem in code and
re organizes the BHRB processing code with an helper function named
'update_branch_entry' making it more readable. This patch does not
change any functionality.
Signed-off-by: Anshuman Khandual
---
arch/powerpc/perf/core-book3s.c
This is the continuation (rebased and reworked) of the series
posted at https://lkml.org/lkml/2014/5/5/153 (which is V6). I remember
to have incremented the version count for the re-send of the first four
patches of the series to Peter Z for generic review which got pulled in
last year. The
Generic powerpc branch analysis support added in the code patching
library which will help the subsequent patch on SW based filtering
of branch records in perf.
Signed-off-by: Anshuman Khandual
---
arch/powerpc/include/asm/code-patching.h | 15
arch/powerpc/lib/code-patching.c |
This patch enables privilege mode SW branch filters. Also modifies
POWER8 PMU branch filter configuration so that the privilege mode
branch filter implemented as part of base PMU event configuration
is reflected in bhrb filter mask. As a result, the SW will skip and
not try to process the privilege
The commit 69111bac42f5ce ("powerpc: Replace __get_cpu_var uses")
replaced all usage of get_cpu_var with this_cpu_ptr inside core
perf event handling on powerpc. But it skipped one of them which
is being replaced with this patch.
Reported-by: Daniel Axtens
Signed-off-by: Anshuman Khandual
---
a
Branch record attributes 'mispred' and 'predicted' are single bit
fields as defined in the perf ABI. Hence the data type of the field
'pred' used during BHRB processing should be changed from integer
to bool. This patch also changes the name of the variable from 'pred'
to 'mispred' making the logic
BHRB (Branch History Rolling Buffer) is a rolling buffer. Hence we
might end up in a situation where we have read one target address
but when we try to read the next entry indicating the from address
of the target address, the buffer just overflows. In this case, the
captured from address will be z
This patch just changes data type of bhrb_users variable from
int to unsigned int because it never contains a negative value.
Reported-by: Daniel Axtens
Signed-off-by: Anshuman Khandual
---
arch/powerpc/perf/core-book3s.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/a
This patch does some code re-arrangements to make it clear that kernel
ignores any separate privilege level branch filter request and does not
support any combinations of HW PMU branch filters.
Signed-off-by: Anshuman Khandual
---
arch/powerpc/perf/power8-pmu.c | 22 +++---
1 fil
The five generic patches from BHRB SW branch filter enablement
series have been separated and grouped together in this series. These
patches are required to be applied before using the upcoming V10 of the
BHRB SW branch filter patch series.
Anshuman Khandual (5):
powerpc/perf: Drop the b
Am 04.02.2015 um 21:36 schrieb SF Markus Elfring:
> From: Markus Elfring
> Date: Wed, 4 Feb 2015 21:32:27 +0100
>
> The of_node_put() function tests whether its argument is NULL and then
> returns immediately. Thus the test around the call is not needed.
>
> This issue was detected by using the
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