From: Thomas Gleixner <tglx@linutronix.de>
To: Jinjie Ruan <ruanjinjie@huawei.com>,
oleg@redhat.com, linux@armlinux.org.uk, will@kernel.org,
mark.rutland@arm.com, catalin.marinas@arm.com,
sstabellini@kernel.org, maz@kernel.org, peterz@infradead.org,
luto@kernel.org, kees@kernel.org, wad@chromium.org,
akpm@linux-foundation.org, samitolvanen@google.com,
arnd@arndb.de, ojeda@kernel.org, rppt@kernel.org,
hca@linux.ibm.com, aliceryhl@google.com,
samuel.holland@sifive.com, paulmck@kernel.org, aquini@redhat.com,
petr.pavlu@suse.com, ruanjinjie@huawei.com,
viro@zeniv.linux.org.uk, rmk+kernel@armlinux.org.uk,
ardb@kernel.org, wangkefeng.wang@huawei.com, surenb@google.com,
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broonie@kernel.org, mbenes@suse.cz, puranjay@kernel.org,
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Jonathan.Cameron@huawei.com, prarit@redhat.com,
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kristina.martsenko@arm.com, ptosi@google.com,
frederic@kernel.org, vschneid@redhat.com,
thiago.bauermann@linaro.org, joey.gouly@arm.com,
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linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
xen-devel@lists.xenproject.org
Subject: Re: [PATCH -next v4 15/19] entry: Add arch irqentry_exit_need_resched() for arm64
Date: Mon, 28 Oct 2024 19:05:09 +0100 [thread overview]
Message-ID: <878qu82je2.ffs@tglx> (raw)
In-Reply-To: <20241025100700.3714552-16-ruanjinjie@huawei.com>
On Fri, Oct 25 2024 at 18:06, Jinjie Ruan wrote:
> As the front patch 6 ~ 13 did, the arm64_preempt_schedule_irq() is
Once this series is applied nobody knows what 'front patch 6 ~ 13' did.
> same with the irq preempt schedule code of generic entry besides those
> architecture-related logic called arm64_irqentry_exit_need_resched().
>
> So add arch irqentry_exit_need_resched() to support architecture-related
> need_resched() check logic, which do not affect existing architectures
> that use generic entry, but support arm64 to use generic irq entry.
Simply say:
ARM64 requires an additional whether to reschedule on return from
interrupt.
Add arch_irqentry_exit_need_resched() as the default NOOP
implementation and hook it up into the need_resched() condition in
raw_irqentry_exit_cond_resched().
This allows ARM64 to implement the architecture specific version for
switchting over to the generic entry code.
That explains things completely independently. Hmm?
Thanks,
tglx
next prev parent reply other threads:[~2024-10-28 18:05 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-25 10:06 [PATCH -next v4 00/19] arm64: entry: Convert to generic entry Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 01/19] arm64: ptrace: Replace interrupts_enabled() with regs_irqs_disabled() Jinjie Ruan
2024-10-29 14:19 ` Mark Rutland
2024-10-31 3:34 ` Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 02/19] arm64: entry: Refactor the entry and exit for exceptions from EL1 Jinjie Ruan
2024-10-29 14:33 ` Mark Rutland
2024-10-31 3:35 ` Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 03/19] arm64: entry: Remove __enter_from_user_mode() Jinjie Ruan
2024-10-29 14:42 ` Mark Rutland
2024-10-31 3:40 ` Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 04/19] arm64: entry: Remove __enter_from_kernel_mode() Jinjie Ruan
2024-10-29 14:37 ` Mark Rutland
2024-10-31 3:56 ` Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 05/19] arm64: entry: Remove __exit_to_kernel_mode() Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 06/19] arm64: entry: Move arm64_preempt_schedule_irq() into exit_to_kernel_mode() Jinjie Ruan
2024-10-29 14:52 ` Mark Rutland
2024-10-31 4:02 ` Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 07/19] arm64: entry: Call arm64_preempt_schedule_irq() only if irqs enabled Jinjie Ruan
2024-10-29 14:55 ` Mark Rutland
2024-10-25 10:06 ` [PATCH -next v4 08/19] arm64: entry: Rework arm64_preempt_schedule_irq() Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 09/19] arm64: entry: Use preempt_count() and need_resched() helper Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 10/19] arm64: entry: preempt_schedule_irq() only if PREEMPTION enabled Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 11/19] arm64: entry: Extract raw_irqentry_exit_cond_resched() function Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 12/19] arm64: entry: Check dynamic key ahead Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 13/19] arm64: entry: Check dynamic resched when PREEMPT_DYNAMIC enabled Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 14/19] entry: Split into irq entry and syscall Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 15/19] entry: Add arch irqentry_exit_need_resched() for arm64 Jinjie Ruan
2024-10-28 18:05 ` Thomas Gleixner [this message]
2024-10-28 22:15 ` Thomas Gleixner
2024-10-29 2:33 ` Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 16/19] arm64: entry: Switch to generic IRQ entry Jinjie Ruan
2024-10-25 10:06 ` [PATCH -next v4 17/19] entry: Add syscall arch functions to use generic syscall for arm64 Jinjie Ruan
2024-10-28 18:21 ` Thomas Gleixner
2024-10-25 10:06 ` [PATCH -next v4 18/19] arm64/ptrace: Split report_syscall() into separate enter and exit functions Jinjie Ruan
2024-10-25 10:07 ` [PATCH -next v4 19/19] arm64: entry: Convert to generic entry Jinjie Ruan
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