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
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 khand...@linux.vnet.ibm.com
---
'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 through
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
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 khand...@linux.vnet.ibm.com
---
arch/powerpc/perf/power8-pmu.c | 22
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 d...@axtens.net
Signed-off-by: Anshuman Khandual khand...@linux.vnet.ibm.com
---
arch/powerpc/perf/core-book3s.c | 4 ++--
1 file changed, 2
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
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
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 d...@axtens.net
Signed-off-by: Anshuman
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
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
Am 04.02.2015 um 21:36 schrieb SF Markus Elfring:
From: Markus Elfring elfr...@users.sourceforge.net
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
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
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 khand...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/code-patching.h | 15
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:
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.
On Tue, Jun 30, 2015 at 07:18:04PM +0100, Grant Likely wrote:
On Thu, 4 Jun 2015 16:42:11 +1000
, Gavin Shan gws...@linux.vnet.ibm.com
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
Thomas Huth th...@redhat.com 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 nik...@linux.vnet.ibm.com wrote:
For a GPT+LVM combination disk, older bootloader that does not
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
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
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
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
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 christophe.le...@c-s.fr
---
arch/powerpc/lib/checksum_32.S | 16 +++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git
On Tue, 30 Jun 2015 13:23:33 +1000
, Benjamin Herrenschmidt b...@kernel.crashing.org
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
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) for
On Thu, 4 Jun 2015 16:42:08 +1000
, Gavin Shan gws...@linux.vnet.ibm.com
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
On Tue, 30 Jun 2015 17:54:14 +0530
Nikunj A Dadhania nik...@linux.vnet.ibm.com 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
On Thu, 4 Jun 2015 16:42:11 +1000
, Gavin Shan gws...@linux.vnet.ibm.com
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
On Thu, 4 Jun 2015 16:42:09 +1000
, Gavin Shan gws...@linux.vnet.ibm.com
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
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
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
Signed-off-by: Nikunj A Dadhania nik...@linux.vnet.ibm.com
Reviewed-by: Thomas Huth th...@redhat.com
---
slof/fs/packages/disk-label.fs | 41 +++--
1 file changed, 15 insertions(+), 26 deletions(-)
diff --git a/slof/fs/packages/disk-label.fs
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
Signed-off-by: Nikunj A Dadhania nik...@linux.vnet.ibm.com
Reviewed-by: Thomas Huth th...@redhat.com
---
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
Signed-off-by: Nikunj A Dadhania nik...@linux.vnet.ibm.com
Reviewed-by: Thomas Huth th...@redhat.com
---
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
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
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 nik...@linux.vnet.ibm.com wrote:
For a GPT+LVM combination disk, older bootloader that does not support
LVM, cannot load kernel from LVM.
The patch adds
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
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