Le 10/08/2022 à 03:52, Jordan NIethe a écrit :
> On Thu, 2022-07-28 at 16:31 +1000, Nicholas Piggin wrote:
>
>> -#define queued_spin_lock queued_spin_lock
>>
>> -static inline void queued_spin_unlock(struct qspinlock *lock)
>> +static __always_inline int queued_spin_trylock(struct qspinlock *
On Mon, 2022-08-08 at 15:24 +1000, Andrew Donnellan wrote:
> > diff --git a/arch/powerpc/include/asm/syscalls.h
> > b/arch/powerpc/include/asm/syscalls.h
> > index 025d4b877161..8b2757d7f423 100644
> > --- a/arch/powerpc/include/asm/syscalls.h
> > +++ b/arch/powerpc/include/asm/syscalls.h
> > @@ -8
On Thu, 2022-07-28 at 16:31 +1000, Nicholas Piggin wrote:
> Give the queue head the ability to stop stealers. After a number of
> spins without sucessfully acquiring the lock, the queue head employs
> this, which will assure it is the next owner.
> ---
> arch/powerpc/include/asm/qspinlock_types.h
clang 14 won't build because ret is uninitialised and can be returned if
both prop and fdtprop are NULL. Drop the ret variable and return an
error in that failure case.
Fixes: b1fc44eaa9ba ("pseries/iommu/ddw: Fix kdump to work in absence of
ibm,dma-window")
Suggested-by: Christophe Leroy
Signe
On Thu, 2022-07-28 at 16:31 +1000, Nicholas Piggin wrote:
> Allow new waiters a number of spins on the lock word before queueing,
> which particularly helps paravirt performance when physical CPUs are
> oversubscribed.
> ---
> arch/powerpc/lib/qspinlock.c | 152 ---
Add POWER9 and POWER10 to CPU families and list Radix MMU.
Signed-off-by: Nicholas Miehlbradt
---
Documentation/powerpc/cpu_families.rst | 13 +
1 file changed, 13 insertions(+)
diff --git a/Documentation/powerpc/cpu_families.rst
b/Documentation/powerpc/cpu_families.rst
index 9b84e
On Thu, 2022-07-28 at 16:31 +1000, Nicholas Piggin wrote:
> This uses more optimal ll/sc style access patterns (rather than
> cmpxchg), and also sets the EH=1 lock hint on those operations
> which acquire ownership of the lock.
> ---
> arch/powerpc/include/asm/qspinlock.h | 25 +--
> arc
On Thu, 2022-07-28 at 16:31 +1000, Nicholas Piggin wrote:
> The first 16 bits of the lock are only modified by the owner, and other
> modifications always use atomic operations on the entire 32 bits, so
> unlocks can use plain stores on the 16 bits. This is the same kind of
> optimisation done by c
On Thu, 2022-07-28 at 16:31 +1000, Nicholas Piggin wrote:
>
> +/*
> + * Bitfields in the atomic value:
> + *
> + * 0: locked bit
> + * 16-31: tail cpu (+1)
> + */
> +#define _Q_SET_MASK(type) (((1U << _Q_ ## type ## _BITS) - 1)\
> + << _Q_ ## typ
On Thu, 2022-07-28 at 16:31 +1000, Nicholas Piggin wrote:
> -#define queued_spin_lock queued_spin_lock
>
> -static inline void queued_spin_unlock(struct qspinlock *lock)
> +static __always_inline int queued_spin_trylock(struct qspinlock *lock)
> {
> - if (!IS_ENABLED(CONFIG_PARAVIRT_SPINLOC
Hi Sathvika,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v5.19 next-20220809]
[cannot apply to powerpc/next powerpc/topic/ppc-kvm masahiroy-kbuild/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note
On Tue, Aug 9, 2022 at 11:59 AM Naveen N. Rao
wrote:
> Clang doesn't support -mprofile-kernel ABI, so guard the checks against
> CONFIG_DYNAMIC_FTRACE_WITH_REGS, rather than the elf ABI version.
>
> Fixes: 23b44fc248f420 ("powerpc/ftrace: Make __ftrace_make_{nop/call}()
> common to PPC32 and PPC6
On 8/9/22 1:21 AM, Krzysztof Kozlowski wrote:
> On 08/08/2022 18:16, Sean Anderson wrote:
>>
>>> This entry here is not
>>> parsed for any tools and only sometimes people look at it. The questions
>>> are directed via entry in maintainers file or via git history, so you
>>> can put company emai
Extend commit b39181f7c6907d ("ftrace: Add FTRACE_MCOUNT_MAX_OFFSET to
avoid adding weak function") to ppc32 and ppc64 -mprofile-kernel by
defining FTRACE_MCOUNT_MAX_OFFSET.
For ppc64 -mprofile-kernel ABI, we can have two instructions at function
entry for TOC setup followed by 'mflr r0' and 'bl _
Le 09/08/2022 à 07:45, Russell Currey a écrit :
> clang 14 won't build because ret is uninitialised and can be returned if
> both prop and fdtprop are NULL.
>
> Fixes: b1fc44eaa9ba ("pseries/iommu/ddw: Fix kdump to work in absence of
> ibm,dma-window")
> Signed-off-by: Russell Currey
> ---
> N
Clang doesn't support -mprofile-kernel ABI, so guard the checks against
CONFIG_DYNAMIC_FTRACE_WITH_REGS, rather than the elf ABI version.
Fixes: 23b44fc248f420 ("powerpc/ftrace: Make __ftrace_make_{nop/call}() common
to PPC32 and PPC64")
Reported-by: Nick Desaulniers
Reported-by: Ondrej Mosnacek
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