low_sleep_handler() can't restore the context from standard
stack because the stack can hardly be accessed with MMU OFF.
Store everything in a global storage area instead of storing
a pointer to the stack in that global storage area.
To avoid a complete churn of the function, still use r1 as
the
This partially reverts commit eb232b162446 ("powerpc/book3s64/kuap: Improve
error reporting with KUAP") and update the fault handler to print
[ 55.022514] Kernel attempted to access user page (7e6725b7) - exploit
attempt? (uid: 0)
[ 55.022528] BUG: Unable to handle kernel data access on
On 06/12/2020 05:12, Rasmus Villemoes wrote:
> -Original Message-
> From: Rasmus Villemoes
> Sent: 2020年12月6日 5:12
> To: Jakub Kicinski
> Cc: Leo Li ; David S. Miller ;
> Qiang Zhao ; net...@vger.kernel.org;
> linuxppc-dev@lists.ozlabs.org; linux-ker...@vger.kernel.org;
>
"Enrico Weigelt, metux IT consult" writes:
> All archs, except Alpha, print out the irq number in hex, but the message
> looks like it was a decimal number, which is quite confusing. Fixing this
> by adding "0x" prefix.
Arguably decimal would be better, /proc/interrupts and /proc/irq/ both
use
Christophe Leroy writes:
> Le 07/12/2020 à 01:24, Michael Ellerman a écrit :
>> Christophe Leroy writes:
>>> Since commit c33165253492 ("powerpc: use non-set_fs based maccess
>>> routines"), userspace access is not granted anymore when using
>>> copy_from_kernel_nofault()
>>>
>>> However,
On Sun, Dec 06, 2020 at 06:41:59PM +0800, Shengjiu Wang wrote:
> The driver is initially designed for sound card using HDMI
> interface on i.MX platform. There is internal HDMI IP or
> external HDMI modules connect with SAI or AUD2HTX interface.
> It supports both transmitter and receiver devices.
On Sun, Dec 6, 2020 at 10:25 PM Florian Fainelli wrote:
>
> +JimQ,
>
> On 12/6/2020 12:16 PM, Krzysztof Wilczyński wrote:
> > Hello Nicolas, Florian and Florian,
> >
> > [...]
> >> -/* Configuration space read/write support */
> >> -static inline int brcm_pcie_cfg_index(int busnr, int devfn, int
defconfig
mips allyesconfig
mips allmodconfig
powerpc allyesconfig
powerpc allmodconfig
i386 randconfig-a005-20201207
i386 randconfig-a004-20201207
i386
[ add perf maintainers ]
On Sun, Nov 8, 2020 at 1:16 PM Vaibhav Jain wrote:
>
> Implement support for exposing generic nvdimm statistics via newly
> introduced dimm-command ND_CMD_GET_STAT that can be handled by nvdimm
> command handler function and provide values for these statistics back
> to
Quoting Geert Uytterhoeven (2020-11-30 00:57:43)
> The R9A06G032 clock driver uses an array of packed structures to reduce
> kernel size. However, this array contains pointers, which are no longer
> aligned naturally, and cannot be relocated on PPC64. Hence when
> compile-testing this driver on
rtas_suspend_last_cpu() and related code perform a lot of work that
isn't relevant to the hibernation workflow. All other CPUs are offline
when called so there is no need to place them in H_JOIN or prod them
on resume, nor is there need for retries or operations on shared
state.
Call the
rtas_suspend_last_cpu() is now unused, remove it and
__rtas_suspend_last_cpu() which also becomes unused.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 1 -
arch/powerpc/kernel/rtas.c | 43 -
2 files changed, 44 deletions(-)
diff --git
In pseries_devicetree_update(), with each call to ibm,update-nodes the
partition firmware communicates the node to be deleted or updated by
placing its phandle in the work buffer. Each of delete_dt_node(),
update_dt_node(), and add_dt_node() have duplicate lookups using the
phandle value and
All code which used this type has been removed.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas-types.h | 8
1 file changed, 8 deletions(-)
diff --git a/arch/powerpc/include/asm/rtas-types.h
b/arch/powerpc/include/asm/rtas-types.h
index aa420561bc10..8df6235d64d1 100644
The pseries hibernate code calls post_mobility_fixup() which is sort
of a dumping ground of fixups that need to run after resuming from
suspend regardless of whether suspend was a hibernation or a
migration. Calling post_mobility_fixup() from
pseries_suspend_enable_irqs() runs this code early in
The pseries hibernate code no longer calls into the original
join/suspend code in kernel/rtas.c, so pseries_prepare_late() and
related code don't accomplish anything now.
Signed-off-by: Nathan Lynch
---
arch/powerpc/platforms/pseries/suspend.c | 25
1 file changed, 25
Partitions with cache nodes in the device tree can encounter the
following warning on resume:
CPU 0 already accounted in PowerPC,POWER9@0(Data)
WARNING: CPU: 0 PID: 3177 at arch/powerpc/kernel/cacheinfo.c:197
cacheinfo_cpu_online+0x640/0x820
These calls to cacheinfo_cpu_offline/online have been
rtas_suspend_cpu() no longer has users; remove it and
__rtas_suspend_cpu() which now becomes unused as well.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 1 -
arch/powerpc/kernel/rtas.c | 52 -
2 files changed, 53 deletions(-)
diff
There are no users left of the suspend_disable_cpu() callback, remove
it.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/machdep.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/powerpc/include/asm/machdep.h
b/arch/powerpc/include/asm/machdep.h
index
Since commit 48f6e7f6d948 ("powerpc/pseries: remove cede offline state
for CPUs"), ppc_md.suspend_disable_cpu() is no longer used and all
CPUs (save one) are placed into true offline state as opposed to
H_JOIN. So pseries_suspend_cpu() is effectively unused; remove it.
Signed-off-by: Nathan Lynch
There are three ways pseries_suspend_begin() can be reached:
1. When "mem" is written to /sys/power/state:
kobj_attr_store()
-> state_store()
-> pm_suspend()
-> suspend_devices_and_enter()
-> pseries_suspend_begin()
This never works because there is no way to supply a valid stream
There is no need for the stream id to be a file-global variable; pass
it from hibernate_store() to pseries_suspend_begin() for the
H_VASI_STATE call.
Signed-off-by: Nathan Lynch
---
arch/powerpc/platforms/pseries/suspend.c | 8 +++-
1 file changed, 3 insertions(+), 5 deletions(-)
diff
rtas_ibm_suspend_me_unsafe() is now unused; remove it and
rtas_percpu_suspend_me() which becomes unused as a result.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 1 -
arch/powerpc/kernel/rtas.c | 67 +
2 files changed, 1 insertion(+),
sys_rtas() cannot call ibm,suspend-me directly in the same way it
handles other inputs. Instead it must dispatch the request to code
that can first perform the H_JOIN sequence before any call to
ibm,suspend-me can succeed. Over time kernel/rtas.c has accreted a fair
amount of platform-specific
This is a mitigation for the relatively rare occurrence where a
virtual IOA can be in a transient state that prevents the
suspend/migration from succeeding, resulting in an error from
ibm,suspend-me.
If the join/suspend sequence returns an error, it is acceptable to
retry as long as the VASI
If we're returning an error to user space, use H_VASI_SIGNAL to send a
cancellation request to the platform. This isn't strictly required but
it communicates that Linux will not attempt to complete the suspend,
which allows the various entities involved to promptly end the
operation in progress.
The partition suspend sequence as specified in the platform
architecture requires that all active processor threads call
H_JOIN, which:
- suspends the calling thread until it is the target of
an H_PROD; or
- immediately returns H_CONTINUE, if the calling thread is the last to
call H_JOIN.
It's incorrect to abort post-suspend processing if
ibm,activate-firmware isn't available. Use rtas_activate_firmware(),
which logs this condition appropriately and allows us to proceed.
Signed-off-by: Nathan Lynch
---
arch/powerpc/platforms/pseries/mobility.c | 15 +--
1 file
The behavior of rtas_ibm_suspend_me_unsafe() is to return -EAGAIN to
the caller until the specified VASI suspend session state makes the
transition from H_VASI_ENABLED to H_VASI_SUSPENDING. In the interest
of separating concerns to prepare for a new implementation of the
join/suspend sequence,
- Convert printk(KERN_ERR) to pr_err().
- Include errno in property update failure message.
- Remove reference to "Post-mobility" from device tree update message:
with pr_err() it will have a "mobility:" prefix.
Signed-off-by: Nathan Lynch
---
arch/powerpc/platforms/pseries/mobility.c | 7
update_dt_node() has a switch statement where the default case lacks a
break statement.
Signed-off-by: Nathan Lynch
---
arch/powerpc/platforms/pseries/mobility.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/pseries/mobility.c
H_VASI_SIGNAL can be used by a partition to request cancellation of
its migration. To be used in future changes.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/hvcall.h | 9 +
1 file changed, 9 insertions(+)
diff --git a/arch/powerpc/include/asm/hvcall.h
Treat the absence of the ibm,update-nodes function as benign instead
of reporting an error. If the platform does not provide that facility,
it's not a problem for Linux.
Signed-off-by: Nathan Lynch
---
arch/powerpc/platforms/pseries/mobility.c | 2 +-
1 file changed, 1 insertion(+), 1
Provide a documented wrapper function for the ibm,activate-firmware
service, which must be called after a partition migration or
hibernation.
If the function is absent or the call fails, the OS will continue to
run normally with the current firmware, so there is no need to perform
any recovery.
We don't completely account for the possible return codes for
ibm,suspend-me. Add definitions for these.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/rtas.h
Now that the name is available, provide a simple wrapper for
ibm,suspend-me which returns both a Linux errno and optionally the
actual RTAS status to the caller.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 1 +
arch/powerpc/kernel/rtas.c | 57
This series aims to improve the pseries-specific partition migration
and hibernation implementation, part of which has been living in
kernel/rtas.c. Most of that code is eliminated or moved to
platforms/pseries, and the following major functional changes are
made:
- Use stop_machine() instead of
The pseries partition suspend sequence requires that all active CPUs
call H_JOIN, which suspends all but one of them with interrupts
disabled. The "chosen" CPU is then to call ibm,suspend-me to complete
the suspend. Upon returning from ibm,suspend-me, the chosen CPU is to
use H_PROD to wake the
While drmgr has had work in some areas to make its RTAS syscall
interactions endian-neutral, its code for performing partition
migration via the syscall has never worked on LE. While it is able to
complete ibm,suspend-me successfully, it crashes when attempting the
subsequent ibm,update-nodes
On Mon, Dec 07, 2020 at 09:56:56AM -0800, Nick Desaulniers wrote:
> On Mon, Dec 7, 2020 at 4:23 AM Michael Ellerman wrote:
> > So is clang defining __powerpc64__ even for 32-bit code?
> >
> > And the answer appears to be yes:
> >
> > $ clang --version
> > Ubuntu clang version 11.0.0-2
> >
Le 07/12/2020 à 01:24, Michael Ellerman a écrit :
Christophe Leroy writes:
Since commit c33165253492 ("powerpc: use non-set_fs based maccess
routines"), userspace access is not granted anymore when using
copy_from_kernel_nofault()
However, kthread_probe_data() uses
Since commit c33165253492 ("powerpc: use non-set_fs based maccess
routines"), userspace access is not granted anymore when using
copy_from_kernel_nofault()
However, kthread_probe_data() uses copy_from_kernel_nofault()
to check validity of pointers. When the pointer is NULL,
it points to
On Sat, 05 Dec 2020 18:24:26 +0300, Serge Semin wrote:
> Intel Keem Bay DWC3 compatible DT nodes are supposed to have a DWC USB3
> compatible sub-node to describe a fully functioning USB interface. Let's
> use the available DWC USB3 DT schema to validate the Qualcomm DWC3
> sub-nodes.
>
> Note
On Sat, 05 Dec 2020 18:24:08 +0300, Serge Semin wrote:
> There can be three distinctive types of the USB controllers: USB hosts,
> USB peripherals/gadgets and USB OTG, which can switch from one role to
> another. In order to have that hierarchy handled in the DT binding files,
> we need to collect
On Sat, 05 Dec 2020 18:24:17 +0300, Serge Semin wrote:
> DWC USB3 DT node is supposed to be compliant with the Generic xHCI
> Controller schema, but with additional vendor-specific properties, the
> controller-specific reference clocks and PHYs. So let's convert the
> currently available legacy
From: Colin Ian King
There is a spelling mistake in the help text of the Kconfig. Fix it.
Signed-off-by: Colin Ian King
---
arch/powerpc/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 8fb61a285c76..4010bae52351
All archs, except Alpha, print out the irq number in hex, but the message
looks like it was a decimal number, which is quite confusing. Fixing this
by adding "0x" prefix.
Signed-off-by: Enrico Weigelt, metux IT consult
---
arch/arm/include/asm/hw_irq.h | 2 +-
* Gautham R. Shenoy [2020-12-04 10:18:47]:
> From: "Gautham R. Shenoy"
>
>
> Signed-off-by: Gautham R. Shenoy
> ---
>
> +extern bool thread_group_shares_l2;
> /*
> * On big-core systems, each core has two groups of CPUs each of which
> * has its own L1-cache. The thread-siblings which
* Gautham R. Shenoy [2020-12-04 10:18:46]:
> From: "Gautham R. Shenoy"
>
> On POWER systems, groups of threads within a core sharing the L2-cache
> can be indicated by the "ibm,thread-groups" property array with the
> identifier "2".
>
> This patch adds support for detecting this, and when
kernel test robot writes:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
> next-test
> head: 4e4ed87981c764498942c52004c620bb8f104eac
> commit: d0e3fc69d00d1f50d22d6b6acfc555ccda80ad1e [54/220] powerpc/vdso:
> Provide __kernel_clock_gettime64() on vdso32
> config:
* Gautham R. Shenoy [2020-12-04 10:18:45]:
> From: "Gautham R. Shenoy"
>
> static int parse_thread_groups(struct device_node *dn,
> -struct thread_groups *tg,
> -unsigned int property)
> +struct
On Mon, Dec 7, 2020 at 1:08 PM Geert Uytterhoeven wrote:
> JFYI, when comparing v5.10-rc7[1] to v5.10-rc6[3], the summaries are:
> - build errors: +1/-0
+ /kisskb/src/arch/powerpc/platforms/powermac/smp.c: error: implicit
declaration of function 'cleanup_cpu_mmu_context'
On 12/4/20 3:26 PM, Brian King wrote:
On 12/2/20 11:27 AM, Tyrel Datwyler wrote:
On 12/2/20 7:14 AM, Brian King wrote:
On 12/1/20 6:53 PM, Tyrel Datwyler wrote:
Introduce several new vhost fields for managing MQ state of the adapter
as well as initial defaults for MQ enablement.
https://bugzilla.kernel.org/show_bug.cgi?id=209277
--- Comment #2 from Borislav Petkov (b...@alien8.de) ---
https://git.kernel.org/pub/scm/linux/kernel/git/ras/ras.git/commit/?h=edac-drivers=0385979a30dc4abdef2dcebbccef818947c80cb7
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On Mon, Dec 07, 2020 at 03:02:53PM +1100, Michael Ellerman wrote:
> The mv64x60 EDAC driver depends on CONFIG_MV64X60. But that symbol is
> not user-selectable, and the last code that selected it was removed
> with the C2K board support in 2018, see:
>
> 92c8c16f3457 ("powerpc/embedded6xx:
On Sat, 2020-12-05 at 18:24 +0300, Serge Semin wrote:
> DWC USB3 DT node is supposed to be compliant with the Generic xHCI
> Controller schema, but with additional vendor-specific properties, the
> controller-specific reference clocks and PHYs. So let's convert the
> currently available legacy
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