| From: |
| Frederic Weisbecker <frederic-AT-kernel.org> |
| To: |
| Peter Zijlstra <peterz-AT-infradead.org>, Catalin Marinas <catalin.marinas-AT-arm.com>, Will Deacon <will-AT-kernel.org> |
| Subject: |
| [PATCH 0/4] arm64: Support dynamic preemption |
| Date: |
| Tue, 21 Sep 2021 01:32:33 +0200 |
| Message-ID: |
| <20210920233237.90463-1-frederic@kernel.org> |
| Cc: |
| LKML <linux-kernel-AT-vger.kernel.org>, Frederic Weisbecker <frederic-AT-kernel.org>, Ard Biesheuvel <ardb-AT-kernel.org>, James Morse <james.morse-AT-arm.com>, Quentin Perret <qperret-AT-google.com>, Mark Rutland <mark.rutland-AT-arm.com> |
| Archive-link: |
| Article |
Traditionally the preemption flavour was defined on Kconfig then fixed
in stone. Now with CONFIG_PREEMPT_DYNAMIC the users can overwrite that
on boot with the "preempt=" boot option (and also through debugfs but
that's a secret).
Linux distros can be particularly fond of this because it allows them
to rely on a single kernel image for all preemption flavours.
x86 was the only supported architecture so far but interests are
broader.
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
preempt/arm
HEAD: 351eaa68b5304b8b0e7c6e7b4470dd917475e65e
Thanks,
Frederic
---
Frederic Weisbecker (3):
sched/preempt: Prepare for supporting !CONFIG_GENERIC_ENTRY dynamic preemption
arm64: Implement IRQ exit preemption static call for dynamic preemption
arm64: Implement HAVE_PREEMPT_DYNAMIC
Ard Biesheuvel (1):
arm64: implement support for static call trampolines
arch/Kconfig | 1 -
arch/arm64/Kconfig | 2 ++
arch/arm64/include/asm/insn.h | 2 ++
arch/arm64/include/asm/preempt.h | 23 ++++++++++++++++++++++-
arch/arm64/include/asm/static_call.h | 28 ++++++++++++++++++++++++++++
arch/arm64/kernel/Makefile | 4 ++--
arch/arm64/kernel/entry-common.c | 15 ++++++++++++---
arch/arm64/kernel/patching.c | 14 +++++++++++---
arch/arm64/kernel/vmlinux.lds.S | 1 +
include/linux/entry-common.h | 3 ++-
kernel/sched/core.c | 6 ++++--
11 files changed, 86 insertions(+), 13 deletions(-)
