On 10/6/21 11:02 PM, Paul A. Clarke wrote:
> Kajol,
>
> On Wed, Oct 06, 2021 at 01:01:19PM +0530, Kajol Jain wrote:
>> Add pmu metric json file for power10 platform.
>
> Thanks for producing this! A few minor corrections, plus a number of
> stylistic comments below...
Hi Paul,
I will
On Tue, 5 Oct 2021 00:56:37 +1000, Nicholas Piggin wrote:
> This fixes a number of bugs found mostly looking at a MCE handler issue,
> which should be fixed in patch 5 of the series, previous attempt here
> which Ganesh found to be wrong.
>
>
On Wed, 6 Oct 2021 01:55:19 +0530, Naveen N. Rao wrote:
> This is v2 of the series posted at:
> http://lkml.kernel.org/r/cover.1633104510.git.naveen.n@linux.vnet.ibm.com
>
> Only patches from v1 that need to go into powerpc/fixes are included.
> Other patches will be posted as a separate
On Mon, 20 Sep 2021 22:03:26 +0530, Mahesh Salgaonkar wrote:
> On pseries lpar when an empty slot is assigned to partition OR on single
> lpar mode, kdump kernel crashes during issuing PHB reset. In the kdump
> scenario, we traverse all PHBs and issue reset using the pe_config_addr of
> first
Le 25/11/2020 à 06:16, Aneesh Kumar K.V a écrit :
Reviewed-by: Sandipan Das
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/mm/book3s64/pkeys.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c
Rob Herring writes:
> Replace open coded parsing of CPU nodes' 'reg' property with
> of_get_cpu_hwid().
>
> Cc: Michael Ellerman
> Cc: Benjamin Herrenschmidt
> Cc: Paul Mackerras
> Cc: linuxppc-dev@lists.ozlabs.org
> Signed-off-by: Rob Herring
> ---
> arch/powerpc/kernel/smp.c | 7 +--
>
On Wed, 15 Sep 2021 16:12:24 +0200, Christophe Leroy wrote:
> At interrupt exit, kuap_kernel_restore() calls kuap_unclok() with the
> value contained in regs->kuap. However, when regs->kuap contains
> 0x it means that KUAP was not unlocked so calling
> kuap_unlock() is unrelevant and
On Thu, 30 Sep 2021 12:25:35 +0200, Cédric Le Goater wrote:
> The IPR drivers tests for MSI support at probe time with MSI vector 0
> and when done, frees the IRQ with free_irq(). This test was introduced
> by 95fecd90397e ("ipr: add test for MSI interrupt support") as an
> improvement of commit
On a kernel without CONFIG_STRICT_KERNEL_RWX, running EXEC_RODATA
test leads to "Illegal instruction" failure.
Looking at the content of rodata_objcopy.o, we see that the
function content zeroes only:
Disassembly of section .rodata:
<.lkdtm_rodata_do_nothing>:
Add kuap_lock() and call it when entering interrupts from user.
It is called kuap_lock() as it is similar to kuap_save_and_lock()
without the save.
However book3s/32 already have a kuap_lock(). Rename it
kuap_lock_addr().
Signed-off-by: Christophe Leroy
---
This adds KUAP support to 40x. This is done by checking
the content of SPRN_PID at the time user pgtable is loaded.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/head_40x.S | 8
arch/powerpc/platforms/Kconfig.cputype | 1 +
2 files changed, 9 insertions(+)
diff --git
All platforms now have KUAP so remove CONFIG_PPC_HAVE_KUAP
Signed-off-by: Christophe Leroy
---
arch/powerpc/mm/nohash/kup.c | 1 -
arch/powerpc/platforms/Kconfig.cputype | 11 ---
2 files changed, 12 deletions(-)
diff --git a/arch/powerpc/mm/nohash/kup.c
When interrupt and syscall entries where converted to C, KUEP locking
and unlocking was also converted. It improved performance by unrolling
the loop, and allowed easily implementing boot time deactivation of
KUEP.
However, null_syscall selftest shows that KUEP is still heavy
(361 cycles with
Calling 'mfsr' to get the content of segment registers is heavy,
in addition it requires clearing of the 'reserved' bits.
In order to avoid this operation, save it in mm context and in
thread struct.
The saved sr0 is the one used by kernel, this means that on
locking entry it can be used as is.
As the crashkernel reserve memory at 128MB offset in the first memory
block, it leaves less than 128MB memory to accommodate other essential
system resources that need memory reservation in the same block. This
creates kernel boot failure on large config LPARs having core count
greater than 192.
Also call kuap_lock() and kuap_save_and_lock() from
interrupt functions with CONFIG_PPC64.
For book3s/64 we keep them empty as it is done in assembly.
Also do the locked assert when switching task unless it is
book3s/64.
Signed-off-by: Christophe Leroy
---
On booke/40x we don't have segments like book3s/32.
On booke/40x we don't have access protection groups like 8xx.
Use the PID register to provide user access protection.
Kernel address space can be accessed with any PID.
User address space has to be accessed with the PID of the user.
User PID is
On booke/40x we don't have segments like book3s/32.
On booke/40x we don't have access protection groups like 8xx.
Use the PID register to provide user access protection.
Kernel address space can be accessed with any PID.
User address space has to be accessed with the PID of the user.
User PID is
Make the following functions generic to all platforms.
- bad_kuap_fault()
- kuap_assert_locked()
- kuap_save_and_lock() (PPC32 only)
- kuap_kernel_restore()
- kuap_get_and_assert_locked()
And for all platforms except book3s/64
- allow_user_access()
- prevent_user_access()
-
__kuap_assert_locked() is redundant with
__kuap_get_and_assert_locked().
Move the verification of CONFIG_PPC_KUAP_DEBUG in kuap_assert_locked()
and make it call __kuap_get_and_assert_locked() directly.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/book3s/32/kup.h | 5 -
PPC_KUAP_DEBUG is supported by all platforms doing PPC_KUAP,
it doesn't depend on Radix on book3s/64.
This will avoid adding one more dependency when implementing
KUAP on book3e/64.
Signed-off-by: Christophe Leroy
---
v2: New
---
arch/powerpc/platforms/Kconfig.cputype | 2 +-
1 file changed, 1
This adds KUAP support to 85xx in 32 bits mode.
This is done by reading the content of SPRN_MAS1 and checking
the TID at the time user pgtable is loaded.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/head_fsl_booke.S | 12
arch/powerpc/platforms/Kconfig.cputype | 1 +
From: Mahesh Salgaonkar
On system with radix support available, early_radix_enabled() starts
returning true for a small window (until mmu_early_init_devtree() is
called) even when radix mode disabled on kernel command line. This causes
ppc64_bolted_size() to return ULONG_MAX in HPT mode instead
We have many functionnalities common to 40x and BOOKE, it leads to
many places with #if defined(CONFIG_BOOKE) || defined(CONFIG_40x).
We are going to add a few more with KUAP for booke/40x, so create
a new symbol which is defined when either BOOKE or 40x is defined.
Signed-off-by: Christophe
This adds KUAP support to book3e/64.
This is done by reading the content of SPRN_MAS1 and checking
the TID at the time user pgtable is loaded.
Signed-off-by: Christophe Leroy
---
arch/powerpc/mm/nohash/tlb_low_64e.S | 40 ++
arch/powerpc/platforms/Kconfig.cputype | 1
This adds KUAP support to 44x. This is done by checking
the content of SPRN_PID at the time it is read and written
into SPRN_MMUCR.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/head_44x.S | 16
arch/powerpc/platforms/Kconfig.cputype | 1 +
2 files changed,
In order to reuse it on booke/4xx, move KUAP
setup routine out of 8xx.c
Make them usable on SMP by removing the __init tag
as it is called for each CPU.
And use __prevent_user_access() instead of hard
coding initial lock.
Signed-off-by: Christophe Leroy
---
arch/powerpc/mm/nohash/8xx.c|
Today, every platform checks that KUAP is not de-activated
before doing the real job.
Move the verification out of platform specific functions.
Signed-off-by: Christophe Leroy
---
v2: Added missing check in bad_kuap_fault()
---
arch/powerpc/include/asm/book3s/32/kup.h | 34 +++-
On large config LPARs (having 192 and more cores), Linux fails to boot
due to insufficient memory in the first memblock. It is due to the
memory reservation for the crash kernel which starts at 128MB offset of
the first memblock. This memory reservation for the crash kernel doesn't
leave enough
From: Mahesh Salgaonkar
At the time when we detect and allocate paca for boot cpu, we havn't yet
detected mmu feature of 1T segments support (not until
mmu_early_init_devtree() call). This causes ppc64_bolted_size() to return
256MB as limit forcing boot cpu paca allocation below 256MB always.
On Tue, Jul 20, 2021 at 05:01:45PM +0200, Niklas Schnelle wrote:
> The helper function pci_dev_is_added() from drivers/pci/pci.h is used in
> PCI arch code of both s390 and powerpc leading to awkward relative
> includes. Move it to the global include/linux/pci.h and get rid of these
> includes
On Mon, Oct 4, 2021 at 4:32 AM Krzysztof Kozlowski
wrote:
>
> On 01/10/2021 18:17, Li Yang wrote:
> > On Fri, Oct 1, 2021 at 5:01 AM Krzysztof Kozlowski
> > wrote:
> >>
>
> (...)
>
> >>> +
> >>> + interrupts:
> >>> +minItems: 1
> >>> +maxItems: 2
> >>> +description: |
> >>> +
On Fri, Oct 8, 2021 at 9:59 AM Christophe Leroy
wrote:
>
> On a kernel without CONFIG_STRICT_KERNEL_RWX, running EXEC_RODATA
> test leads to "Illegal instruction" failure.
>
> Looking at the content of rodata_objcopy.o, we see that the
> function content zeroes only:
>
> Disassembly of
In preparation for splitting this driver up into a platform_driver
and a pci_driver, replace outl/inl usage with pci_iomap and
ioread32/iowrite32.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: replaced ioport_map with pci_iomap
drivers/i2c/busses/i2c-pasemi.c | 16
Split out common reset call to its own function so that we
can later add support for selecting the clock frequency
and an additional enable bit found in newer revisions.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
drivers/i2c/busses/i2c-pasemi-core.c | 15
Split off the PCI driver so that we can reuse common code for the
platform driver.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
drivers/i2c/busses/Makefile | 1 +
.../{i2c-pasemi.c => i2c-pasemi-core.c} | 88 +
Christian,
Self-service available on lore:
https://lore.kernel.org/all/20211008163532.75569-1-s...@svenpeter.dev/
There are links on there to download a whole thread as an mbox if needed.
-Olof
On Fri, Oct 8, 2021 at 1:20 PM Christian Zigotzky
wrote:
>
> Hi Michael,
>
> Do you have a mbox
Hi,
On Fri, Oct 8, 2021 at 9:36 AM Sven Peter wrote:
>
> Hi,
>
> v1:
> https://lore.kernel.org/linux-i2c/20210926095847.38261-1-s...@svenpeter.dev/
>
> Changes for v2:
> - Added reviewed-by/acks
> - Switched from ioport_map to pci_iomap as suggested by Arnd Bergmann
> - Renamed
On Fri, Oct 08, 2021 at 11:09:47AM -0700, Nick Desaulniers wrote:
> On Fri, Oct 8, 2021 at 9:59 AM Christophe Leroy
> wrote:
> >
> > On a kernel without CONFIG_STRICT_KERNEL_RWX, running EXEC_RODATA
> > test leads to "Illegal instruction" failure.
> >
> > Looking at the content of
Some later revisions after the original PASemi I2C controller introduce
what likely is an enable bit to the CTL register. Without setting it the
actual i2c transmission is never started.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
With all the previous preparations we can now finally add
the platform driver to support the PASemi-based controllers
in Apple SoCs. This does not work on the M1 yet but should
work on the early iPhones already.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2:
- renamed
Using managed device resources means there's nothing left to be done in
pasemi_smb_pci_remove and also allows to remove base and size from
struct pasemi_smbus.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
drivers/i2c/busses/i2c-pasemi-core.c | 8 ++---
On Fri, 8 Oct 2021 18:58:40 +0200, Christophe Leroy wrote:
> On a kernel without CONFIG_STRICT_KERNEL_RWX, running EXEC_RODATA
> test leads to "Illegal instruction" failure.
>
> Looking at the content of rodata_objcopy.o, we see that the
> function content zeroes only:
>
> Disassembly of
Hi Michael,
Do you have a mbox link for the v2 changes?
I would like to test them on my AmigaOne X1000.
Thanks,
Christian
On 27. Sep 2021, at 09:58, Michael Ellerman wrote:
Christian, the whole series is downloadable as a single mbox here:
https://patchwork.ozlabs.org/series/264134/mbox/
Hi,
v1: https://lore.kernel.org/linux-i2c/20210926095847.38261-1-s...@svenpeter.dev/
Changes for v2:
- Added reviewed-by/acks
- Switched from ioport_map to pci_iomap as suggested by Arnd Bergmann
- Renamed i2c-pasemi-apple.c to i2c-pasemi-platform.c as suggested by
Wolfram Sang
- Replaced
The Apple I2C controller is based on the PASemi I2C controller.
It is present on Apple SoCs such as the M1.
Reviewed-by: Arnd Bergmann
Reviewed-by: Rob Herring
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
.../devicetree/bindings/i2c/apple,i2c.yaml| 61 +++
Right now the i2c adapter name includes the port number which can
indirectly be used to identify the device. Replace that with dev_name
to directly identify the device and to also allow this to work correctly
once we add platform support.
Signed-off-by: Sven Peter
---
v1 -> v2: new commit
Prepare to create a platform driver by removing all usages of pci_dev we
can.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
drivers/i2c/busses/i2c-pasemi.c | 12 ++--
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git
Split off common probing code that will be used by both the PCI and the
platform device.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
drivers/i2c/busses/i2c-pasemi.c | 39 +
1 file changed, 25 insertions(+), 14 deletions(-)
Right now the bus frequency has always been hardcoded as
100 KHz with the specific reference clock used in the PASemi
PCI controllers. Make this configurable to prepare for the
platform driver.
Reviewed-by: Arnd Bergmann
Signed-off-by: Sven Peter
---
v1 -> v2: no changes
On Mon, Oct 4, 2021 at 12:14 PM Rob Herring wrote:
>
> On Thu, Sep 30, 2021 at 07:09:21PM -0500, Li Yang wrote:
> > After we update the binding to not use simple-bus compatible for the
> > controller, we need the driver to populate the child devices explicitly.
> >
> > Signed-off-by: Li Yang
> >
We fix the following warnings when building kernel with W=1:
arch/powerpc/kernel/eeh.c:598: warning: Function parameter or member 'function'
not described in 'eeh_pci_enable'
arch/powerpc/kernel/eeh.c:774: warning: Function parameter or member 'edev' not
described in 'eeh_set_dev_freset'
allmodconfig
i386 randconfig-c001-20211008
s390 debug_defconfig
pariscgeneric-32bit_defconfig
m68k bvme6000_defconfig
armhisi_defconfig
sh
Barry recently introduced a new CONFIG_SCHED_CLUSTER, and discussions
around that highlighted that every architecture redefines its own help text
and dependencies for CONFIG_SCHED_SMT and CONFIG_SCHED_MC.
Move the definition of those to scheduler's Kconfig to centralize help text
and generic
Hi folks,
This stems from Barry introducing a new CONFIG_SCHED_CLUSTER which highlighted
the current state of similar Kconfigs isn't great:
http://lore.kernel.org/r/cagsj_4xzd0sg0df666f0bvhozupmjnw0dn_marer5k1pj6l...@mail.gmail.com
The changes happen all in one big patch; the alternative
Kconfig.preempt already contains more than just preemption configs (see
CONFIG_SCHED_CORE), and a subsequent patch will introduce more
scheduler-specific configs.
Move the file to the scheduler directory.
Suggested-by: Peter Zijlstra
Signed-off-by: Valentin Schneider
---
init/Kconfig
On 06/10/2021 08:31, Kajol Jain wrote:
> Add pmu metric json file for power10 platform.
>
> Signed-off-by: Kajol Jain
> ---
> .../arch/powerpc/power10/metrics.json | 772 ++
I checked this with the new strict JSON parser from "[PATCH 0/3] perf tools:
Enable strict
On Sat, Oct 9, 2021 at 12:54 AM Valentin Schneider
wrote:
>
> Barry recently introduced a new CONFIG_SCHED_CLUSTER, and discussions
> around that highlighted that every architecture redefines its own help text
> and dependencies for CONFIG_SCHED_SMT and CONFIG_SCHED_MC.
>
> Move the definition of
On 09/10/21 01:37, Barry Song wrote:
> On Sat, Oct 9, 2021 at 12:54 AM Valentin Schneider
> wrote:
>>
>> Barry recently introduced a new CONFIG_SCHED_CLUSTER, and discussions
>> around that highlighted that every architecture redefines its own help text
>> and dependencies for CONFIG_SCHED_SMT
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