From: Suraj Jitindar Singh
The POWER9 vCPU TLB management code assumes all threads in a core share
a TLB, and that TLBIEL execued by one thread will invalidate TLBs for
all threads. This is not the case for SMT8 capable POWER9 and POWER10
(big core) processors, where the TLB is split between
From: Tom Rix
With gcc 10.3, there is this compiler error
compiler.h:56:26: error: this statement may
fall through [-Werror=implicit-fallthrough=]
mpc52xx_gpt.c:586:2: note: here
586 | case WDIOC_GETTIMEOUT:
| ^~~~
So add the fallthrough pseudo keyword.
Signed-off-by: Tom Rix
---
From: Tom Rix
With MPC8XXFADS, there is this linker error
ppc64-linux-ld: m8xx_setup.o: in function `cpm_cascade':
m8xx_setup.c: undefined reference to `cpm_get_irq'
cpm_get_irq() is conditionally complied by CPM1
So add a select, like the other plaforms
Signed-off-by: Tom Rix
---
To aid debugging PS3 boot problems change the log level
of several PS3 device errors from pr_debug to pr_warn.
Signed-off-by: Geoff Levand
---
arch/powerpc/platforms/ps3/system-bus.c | 9 +
drivers/ps3/ps3-vuart.c | 2 +-
drivers/ps3/ps3av.c | 22
To aid debugging, add a new PS3 kernel config option
PS3_VERBOSE_RESULT that, when enabled, will print more
verbose messages for the result of LV1 hypercalls.
Signed-off-by: Geoff Levand
---
arch/powerpc/include/asm/ps3.h | 2 +-
arch/powerpc/platforms/ps3/Kconfig | 9 +
2 files
Create two new structures, struct gelic_hw_regs and struct gelic_chain_link,
and replace the corresponding members of struct gelic_descr with the new
structures. struct gelic_hw_regs holds the register variables used by the
gelic hardware device. struct gelic_chain_link holds variables used to
Commit f959dcd6ddfd29235030e8026471ac1b022ad2b0 (dma-direct: Fix
potential NULL pointer dereference) added a null check on the
dma_mask pointer of the kernel's device structure.
Add a dma_mask variable to the ps3_dma_region structure and set
the device structure's dma_mask pointer to point to
Hi,
This is a set of patches that fix various DMA related problems in the PS3
device drivers, and add better error checking and improved message logging.
The gelic network driver had a number of problems and most of the changes are
in it's sources.
Please consider.
-Geoff
The following
General source cleanups and improved logging messages.
Signed-off-by: Geoff Levand
---
drivers/net/ethernet/toshiba/ps3_gelic_net.c | 395 ++-
1 file changed, 216 insertions(+), 179 deletions(-)
diff --git a/drivers/net/ethernet/toshiba/ps3_gelic_net.c
On Fri, May 28, 2021 at 11:29 AM Nathan Chancellor wrote:
>
> A change in clang 13 results in the __lwsync macro being defined as
> __builtin_ppc_lwsync, which emits 'lwsync' or 'msync' depending on what
> the target supports.
Indeed,
$ clang --target=powerpc64le-linux-gnu -mcpu=e500 -m32
for
On Mon, May 31, 2021 at 4:24 AM Daniel Borkmann wrote:
> On 5/29/21 8:48 PM, Paul Moore wrote:
> [...]
> > Daniel's patch side steps that worry by just doing the lockdown
> > permission check when the BPF program is loaded, but that isn't a
> > great solution if the policy changes afterward. I
On Thu, 27 May 2021 18:34:09 +0200, Nicolas Cavallari wrote:
> Otherwise, when compiled as module, a WARN_ON is triggered:
>
> WARNING: CPU: 0 PID: 5 at sound/core/init.c:208 snd_card_new+0x310/0x39c [snd]
> [...]
> CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.10.39 #1
> Hardware name: Freescale
On Mon, May 31, 2021 at 04:12:15PM +0800, Wesley Sheng wrote:
> Replace "It" with "If", since it is a conditional statement.
>
> Signed-off-by: Wesley Sheng
Applied to pci/error for v5.14 with Krzysztof's reviewed-by and
subject "Documentation: PCI: Fix typo in pci-error-recovery.rst" to
match
On Fri, 21 May 2021 12:18:36 +0530
"Naveen N. Rao" wrote:
> In preparation to add support for stack tracer to powerpc, move code to
> save stack trace and to calculate the frame sizes into a separate weak
> function. Also provide access to some of the data structures used by the
> stack trace
"Naveen N. Rao" writes:
> Daniel Axtens wrote:
>> Make our stack-walking code KASAN-safe by using READ_ONCE_NOCHECK -
>> generic code, arm64, s390 and x86 all do this for similar sorts of
>> reasons: when unwinding a stack, we might touch memory that KASAN has
>> marked as being out-of-bounds.
Naveen N. Rao wrote:
+
+unsigned long ftrace_get_traced_func_if_no_stackframe(unsigned long ip,
unsigned long *stack)
+{
+ if (!is_ftrace_entry(ip))
+ return 0;
+
+ if (IS_ENABLED(CONFIG_PPC32))
+ return stack[11]; /* see MCOUNT_SAVE_FRAME */
+
+ if
On 5/20/21 11:50 PM, Christoph Hellwig wrote:
> Hi all,
>
> this series is the first part of cleaning up lifetimes and allocation of
> the gendisk and request_queue structure. It adds a new interface to
> allocate the disk and queue together for bio based drivers, and a helper
> for cleanup/free
Daniel Axtens wrote:
Make our stack-walking code KASAN-safe by using READ_ONCE_NOCHECK -
generic code, arm64, s390 and x86 all do this for similar sorts of
reasons: when unwinding a stack, we might touch memory that KASAN has
marked as being out-of-bounds. In ppc64 KASAN development, I hit this
Fixes gcc '-Wunused-but-set-variable' warning:
arch/powerpc/platforms/cell/spufs/switch.c: In function 'check_ppu_mb_stat':
arch/powerpc/platforms/cell/spufs/switch.c:1660:6: warning:
variable ‘dummy’ set but not used [-Wunused-but-set-variable]
arch/powerpc/platforms/cell/spufs/switch.c: In
Fixes gcc '-Wunused-but-set-variable' warning:
arch/powerpc/platforms/cell/spider-pci.c: In function 'spiderpci_io_flush':
arch/powerpc/platforms/cell/spider-pci.c:28:6: warning:
variable ‘val’ set but not used [-Wunused-but-set-variable]
It never used since introduction.
Signed-off-by: Baokun
On Tue, Jun 1, 2021 at 10:43 AM Baokun Li wrote:
>
> Fixes gcc '-Wunused-but-set-variable' warning:
>
> arch/powerpc/platforms/cell/spufs/switch.c: In function 'check_ppu_mb_stat':
> arch/powerpc/platforms/cell/spufs/switch.c:1660:6: warning:
> variable ‘dummy’ set but not used
It is sometimes desirable to run a command on all cpus in xmon. A
typical scenario is to obtain the backtrace from all cpus in xmon if
there is a soft lockup. Add rudimentary support for the same. The
command to be run on all cpus should be prefixed with 'c#'. As an
example, 'c#t' will run 't'
Roman Bolshakov writes:
> On Sat, May 29, 2021 at 09:39:49AM +1000, Michael Ellerman wrote:
>> Roman Bolshakov writes:
>> > This reverts commit b0b3b2c78ec075cec4721986a95abbbac8c3da4f.
>> >
>> > Otherwise, direct kernel boot with initramfs no longer works in QEMU.
>> > It's broken in some
Le 28/05/2021 à 09:48, Daniel Axtens a écrit :
Make our stack-walking code KASAN-safe by using READ_ONCE_NOCHECK -
generic code, arm64, s390 and x86 all do this for similar sorts of
reasons: when unwinding a stack, we might touch memory that KASAN has
marked as being out-of-bounds. In ppc64
Function 'event_ebb_init' and 'event_leader_ebb_init' are declared
twice in the header file, so remove the repeated declaration.
Cc: Michael Ellerman
Signed-off-by: Shaokun Zhang
---
tools/testing/selftests/powerpc/pmu/ebb/ebb.h | 2 --
1 file changed, 2 deletions(-)
diff --git
On a 16-socket 192-core POWER8 system, a context switching benchmark
with as many software threads as CPUs (so each switch will go in and
out of idle), upstream can achieve a rate of about 1 million context
switches per second. After this patch it goes up to 118 million.
Signed-off-by: Nicholas
On big systems, the mm refcount can become highly contented when doing
a lot of context switching with threaded applications (particularly
switching between the idle thread and an application thread).
Abandoning lazy tlb slows switching down quite a bit in the important
user->idle->user cases, so
Add CONFIG_MMU_LAZY_TLB which can be configured out to disable the lazy
tlb mechanism entirely, and switches to init_mm when switching to a
kernel thread.
NOMMU systems could easily go without this and save a bit of code and
the refcount atomics, because their mm switch is a no-op. They have not
Add explicit _lazy_tlb annotated functions for lazy mm refcounting.
This makes lazy mm references more obvious, and allows explicit
refcounting to be removed if it is not used.
Signed-off-by: Nicholas Piggin
---
arch/arm/mach-rpc/ecard.c| 2 +-
arch/powerpc/kernel/smp.c
There haven't been objections to the series since last posting, this
is just a rebase and tidies up a few comments minor patch rearranging.
Thanks,
Nick
Nicholas Piggin (4):
lazy tlb: introduce lazy mm refcount helper functions
lazy tlb: allow lazy tlb mm switching to be configurable
lazy
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