VAS allocate, modify and deallocate HCALLs returns
H_LONG_BUSY_ORDER_1_MSEC or H_LONG_BUSY_ORDER_10_MSEC for busy
delay and expects OS to reissue HCALL after that delay. But using
msleep() will often sleep at least 20 msecs even though the
hypervisor expects to reissue these HCALLs after 1 or
Hi, Nick
Thanks for your comments.
On 2023/11/25 7:35, Nicholas Piggin wrote:
On Thu Nov 23, 2023 at 7:36 PM AEST, Zhao Ke wrote:
HeXin Tech Co. has applied for a new PVN from the OpenPower Community
for its new processor C2000. The OpenPower has assigned a new PVN
and this newly assigned PVN
> On 27-Nov-2023, at 5:32 PM, Disha Goel wrote:
>
> On 23/11/23 9:31 pm, Athira Rajeev wrote:
>
>> Running "perf list" on powerpc fails with segfault
>> as below:
>>
>>./perf list
>>Segmentation fault (core dumped)
>>
>> This happens because of duplicate events in the json list.
>>
Zhao Ke 赵 可 writes:
> On 2023/11/22 9:46, Michael Ellerman wrote:
>> Zhao Ke writes:
>>> HeXin Tech Co. has applied for a new PVN from the OpenPower Community
>>> for its new processor C2000. The OpenPower has assigned a new PVN
>>> and this newly assigned PVN is 0x0066, add pvr register related
> On 26-Nov-2023, at 12:39 PM, Likhitha Korrapati
> wrote:
>
> The perf test "probe libc's inet_pton & backtrace it with ping" fails on
> powerpc as below:
>
> root@xxx perf]# perf test -v "probe libc's inet_pton & backtrace it with
> ping"
> 85: probe libc's inet_pton & backtrace it with
> On 27-Nov-2023, at 8:21 PM, Arnaldo Carvalho de Melo wrote:
>
> Em Mon, Nov 27, 2023 at 11:12:57AM +, James Clark escreveu:
>> On 23/11/2023 16:02, Athira Rajeev wrote:
>>> Add rule in new Makefile "tests/Makefile.tests" for running
>>> shellcheck on shell test scripts. This automates
Nathan Lynch writes:
> Michael Ellerman writes:
>> Nathan Lynch via B4 Relay
>> writes:
>>> diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
>>> index 1fc0b3fffdd1..52f2242d0c28 100644
>>> --- a/arch/powerpc/kernel/rtas.c
>>> +++ b/arch/powerpc/kernel/rtas.c
>>> @@ -196,6
Nathan Lynch writes:
> Michael Ellerman writes:
>
>> Nathan Lynch via B4 Relay
>> writes:
>>> From: Nathan Lynch
>>>
>>> PowerVM LPARs may retrieve Vital Product Data (VPD) for system
>>> components using the ibm,get-vpd RTAS function.
>> ...
>>>
>>> diff --git
Michael Ellerman writes:
> Nathan Lynch via B4 Relay
> writes:
>> From: Nathan Lynch
>>
>> PowerVM LPARs may retrieve Vital Product Data (VPD) for system
>> components using the ibm,get-vpd RTAS function.
> ...
>>
>> diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst
>>
Michael Ellerman writes:
> Nathan Lynch via B4 Relay
> writes:
>> diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
>> index 1fc0b3fffdd1..52f2242d0c28 100644
>> --- a/arch/powerpc/kernel/rtas.c
>> +++ b/arch/powerpc/kernel/rtas.c
>> @@ -196,6 +224,12 @@ static struct
On Fri, Nov 10, 2023, Michael Ellerman wrote:
> Jason Gunthorpe writes:
> > There are a bunch of reported randconfig failures now because of this,
> > something like:
> >
> >>> arch/powerpc/kvm/../../../virt/kvm/vfio.c:89:7: warning: attribute
> >>> declaration must precede definition
Nathan Lynch via B4 Relay
writes:
> diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
> index 1fc0b3fffdd1..52f2242d0c28 100644
> --- a/arch/powerpc/kernel/rtas.c
> +++ b/arch/powerpc/kernel/rtas.c
> @@ -196,6 +224,12 @@ static struct rtas_function rtas_function_table[]
>
Nathan Lynch via B4 Relay
writes:
> From: Nathan Lynch
>
> PowerVM LPARs may retrieve Vital Product Data (VPD) for system
> components using the ibm,get-vpd RTAS function.
...
>
> diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst
>
Hi Hari,
On Mon, Nov 27, 2023 at 12:30 PM Hari Bathini wrote:
>
> Hi Pingfan, Michael,
>
> On 17/10/23 4:03 pm, Hari Bathini wrote:
> >
> >
> > On 17/10/23 7:58 am, Pingfan Liu wrote:
> >> *** Idea ***
> >> For kexec -p, the boot cpu can be not the cpu0, this causes the problem
> >> of
Hi all,
The following commits are also in the powerpc tree as different commits
(but the same patches):
bc1183a63057 ("misc: ocxl: main: Remove unnecessary ‘0’ values from rc")
29eb0dc7bd1e ("misc: ocxl: link: Remove unnecessary (void*) conversions")
0e425d703c30 ("misc: ocxl: afu_irq:
Nathan Lynch via B4 Relay
writes:
> From: Nathan Lynch
>
> Consistently testing system parameter access is a bit difficult by
> nature -- the set of parameters available depends on the model and
> system configuration, and updating a parameter should be considered a
> destructive operation
Michael Ellerman writes:
> Nathan Lynch via B4 Relay
> writes:
>> From: Nathan Lynch
>>
>> On RTAS platforms there is a general restriction that the OS must not
>> enter RTAS on more than one CPU at a time. This low-level
>> serialization requirement is satisfied by holding a spin
>> lock
Nathan Lynch via B4 Relay
writes:
> From: Nathan Lynch
>
> On RTAS platforms there is a general restriction that the OS must not
> enter RTAS on more than one CPU at a time. This low-level
> serialization requirement is satisfied by holding a spin
> lock (rtas_lock) across most RTAS function
On Tue, Nov 28, 2023 at 1:57 AM Disha Goel wrote:
>
> On 26/11/23 12:39 pm, Likhitha Korrapati wrote:
>
> > The perf test "probe libc's inet_pton & backtrace it with ping" fails on
> > powerpc as below:
> >
> > root@xxx perf]# perf test -v "probe libc's inet_pton & backtrace it with
> > ping"
> >
On Fri, Nov 24, 2023 at 12:39:04PM +0530, Anup Patel wrote:
> From: Atish Patra
>
> RISC-V SBI specification supports advanced debug console
> support via SBI DBCN extension.
>
> Extend the HVC SBI driver to support it.
>
> Signed-off-by: Atish Patra
> Signed-off-by: Anup Patel
> ---
>
On Fri, Nov 24, 2023 at 12:39:03PM +0530, Anup Patel wrote:
> We extend the existing RISC-V SBI earlycon support to use the new
> RISC-V SBI debug console extension.
>
> Signed-off-by: Anup Patel
> Reviewed-by: Andrew Jones
> ---
> drivers/tty/serial/Kconfig | 2 +-
>
Nathan Lynch writes:
> "Aneesh Kumar K.V (IBM)" writes:
>
>> Nathan Lynch writes:
>>
>>> "Aneesh Kumar K.V (IBM)" writes:
Nathan Lynch via B4 Relay
writes:
>
> Use the function lock API to prevent interleaving call sequences of
> the ibm,activate-firmware RTAS
"Aneesh Kumar K.V (IBM)" writes:
> Nathan Lynch writes:
>
>> "Aneesh Kumar K.V (IBM)" writes:
>>> Nathan Lynch via B4 Relay
>>> writes:
>>>
Use the function lock API to prevent interleaving call sequences of
the ibm,activate-firmware RTAS function, which typically requires
On Mon, Nov 27, 2023 at 09:10:54AM -0800, Linus Torvalds wrote:
> On Mon, 27 Nov 2023 at 02:27, Christian Brauner wrote:
> >
> > So I've picked up your patch (vfs.misc). It's clever alright so thanks
> > for the comments in there otherwise I would've stared at this for far
> > too long.
>
> Note
Nathan Lynch writes:
> "Aneesh Kumar K.V (IBM)" writes:
>> Nathan Lynch via B4 Relay
>> writes:
>>
>>>
>>> Use the function lock API to prevent interleaving call sequences of
>>> the ibm,activate-firmware RTAS function, which typically requires
>>> multiple calls to complete the update. While
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
next
branch HEAD: 0d555b57ee660d8a871781c0eebf006e855e918d powerpc:
pmd_move_must_withdraw() is only needed for CONFIG_TRANSPARENT_HUGEPAGE
elapsed time: 1466m
configs tested: 82
configs skipped: 2
The following
Michal Suchánek writes:
>
> On Fri, Nov 17, 2023 at 11:14:27PM -0600, Nathan Lynch via B4 Relay wrote:
>> +do {
>> +blob = papr_vpd_run_sequence(loc_code);
>> +if (!IS_ERR(blob)) /* Success. */
>> +break;
>> +if (PTR_ERR(blob) !=
"Aneesh Kumar K.V (IBM)" writes:
> Nathan Lynch via B4 Relay
> writes:
>> There should be no perceivable change introduced here except that
>> concurrent callers of the same RTAS function via sys_rtas() may block
>> on a mutex instead of spinning on rtas_lock. Changes to follow will
>> add
"Aneesh Kumar K.V (IBM)" writes:
> Nathan Lynch via B4 Relay
> writes:
>
>>
>> Use the function lock API to prevent interleaving call sequences of
>> the ibm,activate-firmware RTAS function, which typically requires
>> multiple calls to complete the update. While the spec does not
>>
Nick Child writes:
> Hi Nathan,
> Patches 1 and 3 LGTM
thanks.
> Regarding this patch, dlpar_memory_remove_by_count() calls
> dlpar_add_lmb() and does not free drc on add error.
> dlpar_add_lmb() is called here in error recovery so probably
> not a big deal.
>
> This is all new code to me but
Introduce qmc_chan_{get,set}_ts_info() function to allow timeslots
modification at runtime.
The modification is provided using qmc_chan_set_ts_info() and will be
applied on next qmc_chan_start().
qmc_chan_set_ts_info() must be called with the channel rx and/or tx
stopped.
Signed-off-by: Herve
Timeslots setting is done at channel start() and stop().
There is no more need to do that during setup_chan().
Simply remove timeslot setting from setup_chan().
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
drivers/soc/fsl/qe/qmc.c | 28
1 file
In order to support runtime timeslot route changes, enable the
channel timeslot entries at channel start() and disable them at
channel stop().
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
drivers/soc/fsl/qe/qmc.c | 175 ---
1 file changed,
In order to support runtime timeslot route changes, some operations will
be different according the routing table used (common Rx and Tx table or
one table for Rx and one for Tx).
The is_tsa_64rxtx flag is introduced to avoid extra computation to
determine the table format each time we need it.
The Tx and Rx entries for a given channel are set in one function.
In order to modify Rx entries and Tx entries independently of one other,
split this function in one for the Rx part and one for the Tx part.
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
In order to allow runtime timeslot route changes, disabling channel TSA
entries needs to be supported.
Add support for this new feature.
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
drivers/soc/fsl/qe/qmc.c | 20 +++-
1 file changed, 11 insertions(+), 9
qmc_setup_tsa* are called once at initialisation.
They initialize the QMC TSA table.
In order to introduce setup function later on for dynamic timeslots
management, rename the function to avoid later confusion.
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
Running sparse (make C=1) on tsa.c raises a lot of warning such as:
--- 8< ---
warning: incorrect type in assignment (different address spaces)
expected void *[noderef] si_regs
got void [noderef] __iomem *
--- 8< ---
Indeed, some variable were declared 'type *__iomem var' instead
QMC child devices support is needed to avoid orphan DT nodes that use a
simple DT phandle to reference a QMC channel.
Allow to instantiate child devices and also extend the API to get the
qmc_chan using a child device.
Signed-off-by: Herve Codina
---
drivers/soc/fsl/qe/qmc.c | 91
Running sparse (make C=1) on qmc.c raises a lot of warning such as:
...
warning: incorrect type in assignment (different address spaces)
expected struct cpm_buf_desc [usertype] *[noderef] __iomem bd
got struct cpm_buf_desc [noderef] [usertype] __iomem *txbd_free
...
Indeed, some
The qmc_chan_reset_rx() set the is_rx_stopped flag. This leads to an
inconsistent state in the following sequence.
qmc_chan_stop()
qmc_chan_reset()
Indeed, after the qmc_chan_reset() call, the channel must still be
stopped. Only a qmc_chan_start() call can move the channel from stopped
Introduce the qmc_chan_setup_tsa* functions to setup entries related
to the given channel.
Use them during QMC channels setup.
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
drivers/soc/fsl/qe/qmc.c | 161 ++-
1 file changed, 125
The timeslots checked in qmc_check_chans() are the timeslots used.
With the introduction of the available timeslots, the used timeslots
are a subset of the available timeslots. The timeslots checked during
the qmc_check_chans() call should be the available ones.
Simply update and check the
The newly introduced qmc_chan_setup_tsa* functions check that the
channel entries are not already used.
These checks are also performed by qmc_check_chans() and are no more
needed.
Remove them from qmc_check_chans().
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
Available timeslots masks define timeslots available for the related
channel. These timeslots are defined by the QMC binding.
Timeslots used are initialized to available timeslots but can be a
subset of available timeslots.
This prepares the dynamic timeslots management (ie. changing timeslots
at
In HDLC mode, some status flags related to the data read transfer can be
set by the hardware and need to be known by a QMC consumer for further
analysis.
Extend the API in order to provide these transfer status flags at the
read complete() call.
In TRANSPARENT mode, these flags have no meaning.
Hi,
This series updates PowerQUICC QMC and TSA drivers to prepare the
support for the QMC HDLC driver.
Patches were previously sent as part of a full feature series:
"Add support for QMC HDLC, framer infrastructure and PEF2256 framer" [1]
The full feature series reached the v9 iteration.
The v1
The inline function specifier is present on some functions but it is
better to let the compiler decide inlining or not these functions.
Remove inline specifiers.
Fixes: 3178d58e0b97 ("soc: fsl: cpm1: Add support for QMC")
Signed-off-by: Herve Codina
Suggested-by: Andrew Lunn
Reviewed-by:
The FPU & VMX preemption tests do not check for errors returned by the
low-level asm routines, preempt_fpu() / preempt_vsx() respectively.
That means any register corruption detected by the asm routines does not
result in a test failure.
Fix it by returning the return value of the asm routines
There is a selftest that checks if FPRs are corrupted across a fork, aka
clone. It was added as part of the series that optimised the clone path
to save the parent's FP state without "giving up" (turning off FP).
See commit 8792468da5e1 ("powerpc: Add the ability to save FPU without
giving it
The FPU preempt test only runs for 20 seconds, which is not particularly
long. Run it for 60 seconds to increase the chance of detecting
corruption.
Signed-off-by: Michael Ellerman
---
tools/testing/selftests/powerpc/math/fpu_preempt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff
The fpu_preempt test randomly initialises an array of doubles to try and
detect FPU register corruption.
However the values it generates do not occupy the full range of values
possible in the 64-bit double, meaning some partial register corruption
could go undetected.
Without getting too carried
There's a selftest that checks FPRs aren't corrupted by preemption, or
just process scheduling. However it only checks the non-volatile FPRs,
meaning corruption of the volatile FPRs could go undetected.
The check_fpu function it calls is used by several other tests, so for
now add a new routine
If platform_get_irq() fails, it need return error code in
qmc_probe().
Fixes: 3178d58e0b97 ("soc: fsl: cpm1: Add support for QMC")
Signed-off-by: Yang Yingliang
---
drivers/soc/fsl/qe/qmc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/soc/fsl/qe/qmc.c
Hi Yang,
On Tue, 28 Nov 2023 21:09:42 +0800
Yang Yingliang wrote:
> If platform_get_irq() fails, it need return error code in
> qmc_probe().
>
> Fixes: 3178d58e0b97 ("soc: fsl: cpm1: Add support for QMC")
> Signed-off-by: Yang Yingliang
> ---
> drivers/soc/fsl/qe/qmc.c | 4 +++-
> 1 file
Michael Ellerman writes:
> Timothy Pearson writes:
>
>> Just wanted to check back and see if this patch was going to be queued
>> up soon? We're still having to work around / advertise the data
>> destruction issues the underlying bug is causing on e.g. Debian
>> Stable.
>
> Yeah I'll apply it
Kunwu Chan writes:
> Hi Christophe,
>
> Thanks for your reply.
> It's my bad. According your reply, i read the code in
> sysfs_do_create_link_sd.There is a null pointer check indeed.
>
> My intention was to check null pointer after memory allocation.
> Whether we can add a comment here for
On 26/11/23 12:39 pm, Likhitha Korrapati wrote:
The perf test "probe libc's inet_pton & backtrace it with ping" fails on
powerpc as below:
root@xxx perf]# perf test -v "probe libc's inet_pton & backtrace it with
ping"
85: probe libc's inet_pton & backtrace it with ping :
---
On Tue, Nov 28, 2023 at 08:05:26AM +, Greg KH wrote:
> On Mon, Nov 27, 2023 at 11:27:07AM -0800, Matthew Maurer wrote:
> > > > >
> > > > > > With regards to future directions that likely won't work for
> > > > > > loosening it:
> > > > > > Unfortunately, the .rmeta format itself is not
On Mon, Nov 27, 2023 at 11:27:07AM -0800, Matthew Maurer wrote:
> > > >
> > > > > With regards to future directions that likely won't work for
> > > > > loosening it:
> > > > > Unfortunately, the .rmeta format itself is not stable, so I wouldn't
> > > > > want to
> > > > > teach genksyms to open
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