From: Jisheng Zhang <jszhang@kernel.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Thomas Gleixner <tglx@linutronix.de>,
Schaffner Tobias <tobias.schaffner@siemens.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org
Subject: [PATCH RT 0/3] riscv: add PREEMPT_RT support
Date: Thu, 11 May 2023 00:24:03 +0800 [thread overview]
Message-ID: <20230510162406.1955-1-jszhang@kernel.org> (raw)
This series is to add PREEMPT_RT support to riscv. Compared with last
try[1], there are two major changes:
1. riscv has been converted to Generic Entry. And riscv uses
asm-generic/preeempt.h, so we need to patch asm-generic's preeempt to
enable lazy preempt support for riscv. This is what patch1 does.
However, it duplicates the preempt_lazy_count() defintion, I'm sure
there must be an elegant solution. Neverless, it doesn't impact the
riscv PREEMPT_RT support itself.
2. three preparation patches(patch1/2/3 in [1]) has been merged in
mainline.
I back-ported the lastest linux-6.3.y-rt patches to the lastest Linus tree,
then cook this series.
Link: https://lore.kernel.org/linux-riscv/20220831175920.2806-1-jszhang@kernel.org/
Jisheng Zhang (3):
asm-generic/preempt: also check preempt_lazy_count for
should_resched() etc.
riscv: add lazy preempt support
riscv: Allow to enable RT
arch/riscv/Kconfig | 2 ++
arch/riscv/include/asm/thread_info.h | 5 ++++-
arch/riscv/kernel/asm-offsets.c | 1 +
include/asm-generic/preempt.h | 8 +++++++-
4 files changed, 14 insertions(+), 2 deletions(-)
--
2.40.1
next reply other threads:[~2023-05-10 16:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-10 16:24 Jisheng Zhang [this message]
2023-05-10 16:24 ` [PATCH RT 1/3] asm-generic/preempt: also check preempt_lazy_count for should_resched() etc Jisheng Zhang
2023-05-10 16:24 ` [PATCH RT 2/3] riscv: add lazy preempt support Jisheng Zhang
2023-05-10 16:24 ` [PATCH RT 3/3] riscv: Allow to enable RT Jisheng Zhang
2023-10-23 16:33 ` [PATCH RT 0/3] riscv: add PREEMPT_RT support Schaffner, Tobias
2023-10-23 16:40 ` Jisheng Zhang
2023-10-24 6:18 ` Sebastian Andrzej Siewior
2023-10-31 14:43 ` Jisheng Zhang
2023-10-31 15:34 ` Sebastian Andrzej Siewior
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