The DEXCR Non-Privileged Hash Instruction Enable (NPHIE) aspect controls
whether the hashst and hashchk instructions are treated as no-ops by the
CPU.
NPHIE behaviour per ISA 3.1B:
0: hashst and hashchk instructions are executed as no-ops
(even when allowed by PCR)
1: hashst
Add capability to track a DEXCR value per thread.
Nothing actually changes these values yet, but they are correctly
tracked, propagated, and used to set the hardware register.
Signed-off-by: Benjamin Gray
---
arch/powerpc/include/asm/processor.h | 12
arch/powerpc/kernel/process.c
The CPU_FEATURE_* mechanism is the only way right now to get
configuration from the "ibm,pa-features" devicetree node. Add a
CPU_FEATURE_* entry for each other DEXCR aspect that will be
exposed to userspace.
The NPHIE feature value is changed for consistency; the actual value is
never accessed or
Adds an initial prctl interface implementation. Unprivileged processes
can query the current prctl setting, including whether an aspect is
implemented by the hardware or is permitted to be modified by a setter
prctl. Editable aspects can be changed by a CAP_SYS_ADMIN privileged
process.
The prctl
Adds the definitions and generic handler for prctl control of the
PowerPC Dynamic Execution Control Register (DEXCR).
Signed-off-by: Benjamin Gray
---
include/uapi/linux/prctl.h | 13 +
kernel/sys.c | 16
2 files changed, 29 insertions(+)
diff --git
(This RFC is mainly to get feedback on the user interface. Tests and
documentation will be added to the non-rfc followups. This builds but
is otherwise untested.)
In the "Add static DEXCR support" series[1] the kernel was made to
initialise the DEXCR to a static value on all CPUs when they
On Mon, Oct 2, 2023 at 11:47 PM Athira Rajeev
wrote:
>
>
>
> > On 03-Oct-2023, at 9:58 AM, Namhyung Kim wrote:
> >
> > Hello,
> >
> > On Thu, Sep 28, 2023 at 12:52 AM Athira Rajeev
> > wrote:
> >>
> >> Update "struct dso" to include new member "text_end".
> >> This new field will represent the
PowerVM Hypervisor dispatches on a whole core basis. In a shared LPAR, a
CPU from a core that is preempted may have a larger latency. In
such a scenario, its preferable to choose a different CPU to run.
If one of the CPUs in the core is active, i.e neither CEDED nor
preempted, then consider this
Hello,
Sorry for the late reply.
On Thu, Oct 5, 2023 at 8:27 AM Athira Rajeev
wrote:
>
>
>
> > On 29-Sep-2023, at 12:19 PM, Athira Rajeev
> > wrote:
> >
> > Add rule in new Makefile "tests/Makefile.tests" for running
> > shellcheck on shell test scripts. This automates below shellcheck
> >
Simple expression parser test fails in powerpc as below:
4: Simple expression parser
test child forked, pid 170385
Using CPUID 004e2102
division by zero
syntax error
syntax error
FAILED tests/expr.c:65 parse test failed
test child finished with -1
Simple
https://bugzilla.kernel.org/show_bug.cgi?id=216156
Michael Ellerman (mich...@ellerman.id.au) changed:
What|Removed |Added
Status|NEW |ASSIGNED
The elfcorehdr describes the CPUs and memory of the crashed kernel to
the kernel that captures the dump, known as the second or fadump kernel.
The elfcorehdr needs to be updated if the system's memory changes due to
memory hotplug or online/offline events.
Currently, memory hotplug events are
Due to changes in memory resources caused by either memory hotplug or
online/offline events, the elfcorehdr, which describes the CPUs and
memory of the crashed kernel to the kernel that collects the dump (known
as second/fadump kernel), becomes outdated. Consequently, attempting
dump collection
The patch titled ("powerpc: make fadump resilient with memory add/remove
events") has made significant changes to the implementation of fadump,
particularly on elfcorehdr creation and fadump crash info header
structure. Therefore, updating the fadump implementation documentation
to reflect those
Problem:
Due to changes in memory resources caused by either memory hotplug or
online/offline events, the elfcorehdr, which describes the cpus and
memory of the crashed kernel to the kernel that collects the dump (known
as second/fadump kernel), becomes outdated. Consequently, attempting
On Sun, Oct 08, 2023 at 09:08:41AM +0200, Eric Dumazet wrote:
> On Fri, Oct 6, 2023 at 8:49 PM Christian Marangi wrote:
> >
> > On Thu, Oct 05, 2023 at 06:16:26PM +0200, Eric Dumazet wrote:
> > > On Tue, Oct 3, 2023 at 8:36 PM Christian Marangi
> > > wrote:
> > > >
> > > > Replace if condition
Hello,
this series converts all platform drivers below drivers/mtd to use the
.remove_new() callback. Compared to the traditional .remove() callback
.remove_new() returns no value. This is a good thing because the driver
core doesn't (and cannot) cope for errors during remove. The only effect
of
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve
On Fri, Oct 6, 2023 at 8:49 PM Christian Marangi wrote:
>
> On Thu, Oct 05, 2023 at 06:16:26PM +0200, Eric Dumazet wrote:
> > On Tue, Oct 3, 2023 at 8:36 PM Christian Marangi
> > wrote:
> > >
> > > Replace if condition of napi_schedule_prep/__napi_schedule and use bool
> > > from napi_schedule
On Fri, Oct 6, 2023 at 8:52 PM Christian Marangi wrote:
>
> On Thu, Oct 05, 2023 at 06:41:03PM +0200, Eric Dumazet wrote:
> > On Thu, Oct 5, 2023 at 6:32 PM Jakub Kicinski wrote:
> > >
> > > On Thu, 5 Oct 2023 18:11:56 +0200 Eric Dumazet wrote:
> > > > OK, but I suspect some users of
On Wed, Oct 4, 2023 at 3:12 PM Zhang Shurong wrote:
>
> The pm_runtime_enable will increase power disable depth. Thus
> a pairing decrement is needed on the error handling path to
> keep it balanced according to context. We fix it by calling
> pm_runtime_disable when error returns.
>
Please add
kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20231008/202310081429.a30c99f2-oliver.s...@intel.com
=
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tb
22 matches
Mail list logo
