From: Mukesh Kumar Chaurasiya <mchauras@linux.ibm.com>
To: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com,
christophe.leroy@csgroup.eu, oleg@redhat.com, kees@kernel.org,
luto@amacapital.net, wad@chromium.org, mchauras@linux.ibm.com,
deller@gmx.de, ldv@strace.io, macro@orcam.me.uk,
charlie@rivosinc.com, akpm@linux-foundation.org,
bigeasy@linutronix.de, ankur.a.arora@oracle.com,
sshegde@linux.ibm.com, naveen@kernel.org,
thomas.weissschuh@linutronix.de, Jason@zx2c4.com,
peterz@infradead.org, tglx@linutronix.de, namcao@linutronix.de,
kan.liang@linux.intel.com, mingo@kernel.org,
oliver.upton@linux.dev, mark.barnett@arm.com,
atrajeev@linux.vnet.ibm.com, rppt@kernel.org,
coltonlewis@google.com, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org
Subject: [RFC V2 0/8] Generic IRQ entry/exit support for powerpc
Date: Tue, 9 Sep 2025 02:32:28 +0530 [thread overview]
Message-ID: <20250908210235.137300-2-mchauras@linux.ibm.com> (raw)
Adding support for the generic irq entry/exit handling for PowerPC. The
goal is to bring PowerPC in line with other architectures that already
use the common irq entry infrastructure, reducing duplicated code and
making it easier to share future changes in entry/exit paths.
This is slightly tested on ppc64le.
The performance benchmarks from perf bench basic syscall are below:
| Metric | W/O Generic Framework | With Generic Framework | Improvement |
| ---------- | --------------------- | ---------------------- | ----------- |
| Total time | 0.885 [sec] | 0.880 [sec] | ~0.56% |
| usecs/op | 0.088518 | 0.088005 | ~0.58% |
| ops/sec | 1,12,97,086 | 1,13,62,977 | ~0.58% |
Thats close to 0.6% improvement with this.
Changelog:
V1 -> V2: Support added for irq with generic framework.
Mukesh Kumar Chaurasiya (8):
powerpc: rename arch_irq_disabled_regs
powerpc: Prepare to build with generic entry/exit framework
powerpc: introduce arch_enter_from_user_mode
powerpc: Introduce syscall exit arch functions
powerpc: add exit_flags field in pt_regs
powerpc: Prepare for IRQ entry exit
powerpc: Enable IRQ generic entry/exit path.
powerpc: Enable Generic Entry/Exit for syscalls.
arch/powerpc/Kconfig | 2 +
arch/powerpc/include/asm/entry-common.h | 550 ++++++++++++++++++++++++
arch/powerpc/include/asm/hw_irq.h | 4 +-
arch/powerpc/include/asm/interrupt.h | 393 +++--------------
arch/powerpc/include/asm/ptrace.h | 2 +
arch/powerpc/include/asm/stacktrace.h | 8 +
arch/powerpc/include/asm/syscall.h | 5 +
arch/powerpc/include/asm/thread_info.h | 1 +
arch/powerpc/include/uapi/asm/ptrace.h | 14 +-
arch/powerpc/kernel/asm-offsets.c | 1 +
arch/powerpc/kernel/interrupt.c | 251 ++---------
arch/powerpc/kernel/interrupt_64.S | 2 -
arch/powerpc/kernel/ptrace/ptrace.c | 142 +-----
arch/powerpc/kernel/signal.c | 8 +
arch/powerpc/kernel/syscall.c | 119 +----
arch/powerpc/kernel/traps.c | 2 +-
arch/powerpc/kernel/watchdog.c | 2 +-
arch/powerpc/perf/core-book3s.c | 2 +-
18 files changed, 698 insertions(+), 810 deletions(-)
create mode 100644 arch/powerpc/include/asm/entry-common.h
--
2.51.0
next reply other threads:[~2025-09-08 21:03 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-08 21:02 Mukesh Kumar Chaurasiya [this message]
2025-09-08 21:02 ` [RFC V2 1/8] powerpc: rename arch_irq_disabled_regs Mukesh Kumar Chaurasiya
2025-09-13 12:50 ` Shrikanth Hegde
2025-09-08 21:02 ` [RFC V2 2/8] powerpc: Prepare to build with generic entry/exit framework Mukesh Kumar Chaurasiya
2025-09-13 12:49 ` Shrikanth Hegde
2025-09-16 4:16 ` Mukesh Kumar Chaurasiya
2025-09-08 21:02 ` [RFC V2 3/8] powerpc: introduce arch_enter_from_user_mode Mukesh Kumar Chaurasiya
2025-09-14 9:02 ` Shrikanth Hegde
2025-09-16 4:19 ` Mukesh Kumar Chaurasiya
2025-09-08 21:02 ` [RFC V2 4/8] powerpc: Introduce syscall exit arch functions Mukesh Kumar Chaurasiya
2025-09-08 21:02 ` [RFC V2 5/8] powerpc: add exit_flags field in pt_regs Mukesh Kumar Chaurasiya
2025-09-08 21:02 ` [RFC V2 6/8] powerpc: Prepare for IRQ entry exit Mukesh Kumar Chaurasiya
2025-09-08 21:02 ` [RFC V2 7/8] powerpc: Enable IRQ generic entry/exit path Mukesh Kumar Chaurasiya
2025-09-16 4:16 ` Shrikanth Hegde
2025-09-18 6:55 ` Mukesh Kumar Chaurasiya
2025-09-08 21:02 ` [RFC V2 8/8] powerpc: Enable Generic Entry/Exit for syscalls Mukesh Kumar Chaurasiya
2025-09-09 6:54 ` Shrikanth Hegde
2025-09-09 8:46 ` Mukesh Kumar Chaurasiya
2025-09-18 6:57 ` Mukesh Kumar Chaurasiya
2025-09-10 20:34 ` [RFC V2 0/8] Generic IRQ entry/exit support for powerpc Thomas Gleixner
2025-09-24 9:04 ` Samir Alamshaha Mulani
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