The new functions use device_{online,offline}() which are userspace
safe.
This is in preparation to move cpu_{up, down} kernel users to use
a safer interface that is not racy with userspace.
Suggested-by: "Paul E. McKenney"
Signed-off-by: Qais Yousef
CC: Thomas Gleixner
CC: "Paul E. McKenney"
Changes in v3:
* Fixup smp_shutdown_nonboot_cpus() to hold the right lock as suggested
by Russel King.
* Split the combined arm/arm64 patch into 2 separate patches.
* Add new add/remove_cpu() functions that wraps lock,
device_online/offline, unlock as sug
The core device API performs extra housekeeping bits that are missing
from directly calling cpu_up/down.
See commit a6717c01ddc2 ("powerpc/rtas: use device model APIs and
serialization during LPM") for an example description of what might go
wrong.
This also prepares to make cpu_up/down a private
"Naveen N. Rao" writes:
> Selecting CONFIG_DEBUG_INFO_BTF results in the below warning from ld:
> ld: warning: orphan section `.BTF' from `.btf.vmlinux.bin.o' being placed
> in section `.BTF'
>
> Include .BTF section in vmlinux explicitly to fix the same.
I don't see any other architectures do
While trying to understand internals of irq handling, came across a
thread [1] in which tglx was referring to avoid usage of setup_irq().
The early boot setup_irq() invocations happen either via 'init_IRQ()'
or 'time_init()', while memory allocators are ready by 'mm_init()'.
Hence instances of set
request_irq() is preferred over setup_irq(). The early boot setup_irq()
invocations happen either via 'init_IRQ()' or 'time_init()', while
memory allocators are ready by 'mm_init()'.
Per tglx[1], setup_irq() existed in olden days when allocators were not
ready by the time early interrupts were ini
On 02/17/2020 08:47 AM, Anshuman Khandual wrote:
> This adds a test validation for architecture exported page table helpers.
> Patch adds basic transformation tests at various levels of the page table.
>
> This test was originally suggested by Catalin during arm64 THP migration
> RFC discussion ea
On 21/2/20 2:26 pm, Alastair D'Silva wrote:
From: Alastair D'Silva
This patch addresses warnings and errors from the kernel doc scripts for
the OpenCAPI driver.
It also makes minor tweaks to make the docs more consistent.
Signed-off-by: Alastair D'Silva
Looks good, fixes all the kerneldoc
Christophe,
> Le 28/06/2019 à 17:47, Christophe Leroy a écrit :
> > The purpose of this series is to reduce the amount of #ifdefs
> > in ptrace.c
> >
>
> Any feedback on this series which aims at fixing the issue you opened at
> https://github.com/linuxppc/issues/issues/128 ?
Yeah, sorry my ba
On 17/02/2020 13:48, Oliver O'Halloran wrote:
> Treat an empty reboot cmd string the same as a NULL string. This squashes a
> spurious unsupported reboot message that sometimes gets out when using
> xmon.
>
> Signed-off-by: Oliver O'Halloran
> ---
> arch/powerpc/platforms/powernv/setup.c | 2
On 21/2/20 2:26 pm, Alastair D'Silva wrote:
From: Alastair D'Silva
This patch adds platform support to map & release LPC memory.
Signed-off-by: Alastair D'Silva
Nothing seems obviously wrong here.
Reviewed-by: Andrew Donnellan
--
Andrew Donnellan OzLabs, ADL Canberra
a...@l
On 17/2/20 1:48 pm, Oliver O'Halloran wrote:
Treat an empty reboot cmd string the same as a NULL string. This squashes a
spurious unsupported reboot message that sometimes gets out when using
xmon.
Signed-off-by: Oliver O'Halloran
Pretty sure I've seen that spurious reboot message a few times
On 17/2/20 1:48 pm, Oliver O'Halloran wrote:
Add a way to manually invoke a fast-reboot rather than setting the NVRAM
flag. The idea is to allow userspace to invoke a fast-reboot using the
optional string argument to the reboot() system call, or using the xmon
zr command so we don't need to leave
Michael Ellerman wrote:
"Naveen N. Rao" writes:
Selecting CONFIG_DEBUG_INFO_BTF results in the below warning from ld:
ld: warning: orphan section `.BTF' from `.btf.vmlinux.bin.o' being placed in
section `.BTF'
Include .BTF section in vmlinux explicitly to fix the same.
I don't see any oth
On 2/21/20 10:48 AM, Gautham R. Shenoy wrote:
> From: "Gautham R. Shenoy"
[...]
>
> Gautham R. Shenoy (5):
> powerpc: Move idle_loop_prolog()/epilog() functions to header file
> powerpc/idle: Add accessor function to always read latest idle PURR
> powerpc/pseries: Account for SPURR ticks
On Fri, 2020-02-21 at 08:21 -0800, Dan Williams wrote:
> On Thu, Feb 20, 2020 at 7:28 PM Alastair D'Silva <
> alast...@au1.ibm.com> wrote:
> > From: Alastair D'Silva
> >
> > This series adds support for OpenCAPI Persistent Memory devices,
> > exposing
> > them as nvdimms so that we can make use o
On Mon, Feb 24, 2020 at 03:34:07PM +1100, Alastair D'Silva wrote:
> V3:
> - Rebase against next/next-20200220
> - Move driver to arch/powerpc/platforms/powernv, we now expect this
> driver to go upstream via the powerpc tree
That's rather the opposite direction of normal; mostly drivers li
On Sun, 2020-02-23 at 20:37 -0800, Matthew Wilcox wrote:
> On Mon, Feb 24, 2020 at 03:34:07PM +1100, Alastair D'Silva wrote:
> > V3:
> > - Rebase against next/next-20200220
> > - Move driver to arch/powerpc/platforms/powernv, we now expect
> > this
> > driver to go upstream via the powerpc
Hello Nathan,
On Fri, Feb 21, 2020 at 09:03:16AM -0600, Nathan Lynch wrote:
> "Gautham R. Shenoy" writes:
>
> > 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()
Apart from adding a VMA flag readable name for trace purpose, this series
does some open encoding replacements with availabe VMA specific wrappers.
This skips VM_HUGETLB check in vma_migratable() as its already being done
with another patch (https://patchwork.kernel.org/patch/11347831/) which
is ye
Lets move vma_is_accessible() helper to include/linux/mm.h which makes it
available for general use. While here, this replaces all remaining open
encodings for VMA access check with vma_is_accessible().
Cc: Guo Ren
Cc: Geert Uytterhoeven
Cc: Ralf Baechle
Cc: Paul Burton
Cc: Benjamin Herrenschm
This replaces all remaining open encodings with is_vm_hugetlb_page().
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Michael Ellerman
Cc: Alexander Viro
Cc: Will Deacon
Cc: "Aneesh Kumar K.V"
Cc: Andrew Morton
Cc: Nick Piggin
Cc: Peter Zijlstra
Cc: Arnd Bergmann
Cc: Ingo Molnar
Cc: A
Hello Nathan,
On Fri, Feb 21, 2020 at 10:47:41AM -0600, Nathan Lynch wrote:
> "Gautham R. Shenoy" writes:
> > +static inline void snapshot_spurr_idle_entry(void)
> > +{
> > + *this_cpu_ptr(&idle_entry_spurr_snap) = mfspr(SPRN_SPURR);
> > +}
> > +
>
> [...]
>
> > +static inline void update_idl
On Fri, Feb 21, 2020 at 10:50:12AM -0600, Nathan Lynch wrote:
> "Gautham R. Shenoy" writes:
> > diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
> > index 80a676d..5b4b450 100644
> > --- a/arch/powerpc/kernel/sysfs.c
> > +++ b/arch/powerpc/kernel/sysfs.c
> > @@ -19,6 +19,7 @@
On Fri, Feb 21, 2020 at 10:55:07AM -0600, Nathan Lynch wrote:
> "Gautham R. Shenoy" writes:
> > diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu
> > b/Documentation/ABI/testing/sysfs-devices-system-cpu
> > index 2e0e3b4..799dc737a 100644
> > --- a/Documentation/ABI/testing/sysfs-de
On 2/23/20 8:21 AM, Sukadev Bhattiprolu wrote:
> Kajol Jain [kj...@linux.ibm.com] wrote:
>> Commit 2b206ee6b0df ("powerpc/perf/hv-24x7: Display change in counter
>> values")' added to print _change_ in the counter value rather then raw
>> value for 24x7 counters. Incase of transactions, the even
On 21/2/20 2:26 pm, Alastair D'Silva wrote:
From: Alastair D'Silva
Tally up the LPC memory on an OpenCAPI link & allow it to be mapped
Signed-off-by: Alastair D'Silva
This commit message is a bit short and could do with some further
explanation.
In particular - it's worth explaining why
On Mon, 2020-02-24 at 16:25 +1100, Andrew Donnellan wrote:
> On 21/2/20 2:26 pm, Alastair D'Silva wrote:
> > From: Alastair D'Silva
> >
> > Tally up the LPC memory on an OpenCAPI link & allow it to be mapped
> >
> > Signed-off-by: Alastair D'Silva
>
> This commit message is a bit short and cou
On 21/2/20 2:26 pm, Alastair D'Silva wrote:
From: Alastair D'Silva
Add OPAL calls for LPC memory alloc/release
Signed-off-by: Alastair D'Silva
Acked-by: Andrew Donnellan
Acked-by: Frederic Barrat
Summary line should be "powerpc/powernv".
--
Andrew Donnellan OzLabs, ADL Canb
On 24/2/20 1:51 pm, Andrew Donnellan wrote:
On 21/2/20 2:26 pm, Alastair D'Silva wrote:
From: Alastair D'Silva
This patch adds platform support to map & release LPC memory.
Signed-off-by: Alastair D'Silva
Nothing seems obviously wrong here.
Reviewed-by: Andrew Donnellan
Oh, commit mess
On Mon, 2020-02-24 at 16:49 +1100, Andrew Donnellan wrote:
> On 21/2/20 2:26 pm, Alastair D'Silva wrote:
> > From: Alastair D'Silva
> >
> > Add OPAL calls for LPC memory alloc/release
> >
> > Signed-off-by: Alastair D'Silva
> > Acked-by: Andrew Donnellan
> > Acked-by: Frederic Barrat
>
> Sum
Le 24/02/2020 à 03:15, Michael Neuling a écrit :
Christophe,
Le 28/06/2019 à 17:47, Christophe Leroy a écrit :
The purpose of this series is to reduce the amount of #ifdefs
in ptrace.c
Any feedback on this series which aims at fixing the issue you opened at
https://github.com/linuxppc/is
On 21/2/20 2:27 pm, Alastair D'Silva wrote:
From: Alastair D'Silva
Add functions to map/unmap LPC memory
Signed-off-by: Alastair D'Silva
---
drivers/misc/ocxl/core.c | 51 +++
drivers/misc/ocxl/ocxl_internal.h | 3 ++
include/misc/ocxl.h
On 21/2/20 2:27 pm, Alastair D'Silva wrote:
From: Alastair D'Silva
This patch emits a message showing how much LPC memory & special purpose
memory was detected on an OCXL device.
Signed-off-by: Alastair D'Silva
---
drivers/misc/ocxl/config.c | 4
1 file changed, 4 insertions(+)
diff
On Mon, 2020-02-24 at 17:02 +1100, Andrew Donnellan wrote:
> On 21/2/20 2:27 pm, Alastair D'Silva wrote:
> > From: Alastair D'Silva
> >
> > Add functions to map/unmap LPC memory
> >
> > Signed-off-by: Alastair D'Silva
> > ---
> > drivers/misc/ocxl/core.c | 51
> >
On Mon, 2020-02-24 at 17:06 +1100, Andrew Donnellan wrote:
> On 21/2/20 2:27 pm, Alastair D'Silva wrote:
> > From: Alastair D'Silva
> >
> > This patch emits a message showing how much LPC memory & special
> > purpose
> > memory was detected on an OCXL device.
> >
> > Signed-off-by: Alastair D'Si
On 24/2/20 5:10 pm, Alastair D'Silva wrote:
Printing this at info level for every single AFU seems a bit noisy.
Perhaps we can print it only if LPC memory is > 0?
There is an early exit before this if there is no LPC memory.
Noted, I'd missed that amidst all the early returns for errors.
I
On Mon, Feb 24, 2020 at 3:43 PM Alastair D'Silva wrote:
>
> On Sun, 2020-02-23 at 20:37 -0800, Matthew Wilcox wrote:
> > On Mon, Feb 24, 2020 at 03:34:07PM +1100, Alastair D'Silva wrote:
> > > V3:
> > > - Rebase against next/next-20200220
> > > - Move driver to arch/powerpc/platforms/powernv,
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