From: Arnd Bergmann <arnd@kernel.org> To: Mohamed Mediouni <mohamed.mediouni@caramail.com> Cc: Linux ARM <linux-arm-kernel@lists.infradead.org>, Mark Rutland <mark.rutland@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Hector Martin <marcan@marcan.st>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>, Stan Skowronek <stan@corellium.com> Subject: Re: [RFC PATCH 2/7] arm64: kernel: Add a WFI hook. Date: Thu, 21 Jan 2021 11:52:13 +0100 [thread overview] Message-ID: <CAK8P3a20XRHaErO5445ds6tf0omSKLMZ_NAWdS=9nBbLb7rdvg@mail.gmail.com> (raw) In-Reply-To: <20210120132717.395873-3-mohamed.mediouni@caramail.com> On Wed, Jan 20, 2021 at 2:27 PM Mohamed Mediouni <mohamed.mediouni@caramail.com> wrote: > --- a/arch/arm64/kernel/cpu_ops.c > +++ b/arch/arm64/kernel/cpu_ops.c > #if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_STACKPROTECTOR_PER_TASK) > #include <linux/stackprotector.h> > @@ -74,8 +75,14 @@ void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); > > static void noinstr __cpu_do_idle(void) > { > - dsb(sy); > - wfi(); > + const struct cpu_operations *ops = get_cpu_ops(task_cpu(current)); > + > + if (ops->cpu_wfi) { > + ops->cpu_wfi(); > + } else { > + dsb(sy); > + wfi(); > + } > } I think the correct place to put this would be a platform specific driver in drivers/cpuidle/ instead of an added low-level callback in the default idle function and a custom cpu_operations structure. Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org> To: Mohamed Mediouni <mohamed.mediouni@caramail.com> Cc: Mark Rutland <mark.rutland@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Hector Martin <marcan@marcan.st>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Stan Skowronek <stan@corellium.com> Subject: Re: [RFC PATCH 2/7] arm64: kernel: Add a WFI hook. Date: Thu, 21 Jan 2021 11:52:13 +0100 [thread overview] Message-ID: <CAK8P3a20XRHaErO5445ds6tf0omSKLMZ_NAWdS=9nBbLb7rdvg@mail.gmail.com> (raw) In-Reply-To: <20210120132717.395873-3-mohamed.mediouni@caramail.com> On Wed, Jan 20, 2021 at 2:27 PM Mohamed Mediouni <mohamed.mediouni@caramail.com> wrote: > --- a/arch/arm64/kernel/cpu_ops.c > +++ b/arch/arm64/kernel/cpu_ops.c > #if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_STACKPROTECTOR_PER_TASK) > #include <linux/stackprotector.h> > @@ -74,8 +75,14 @@ void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); > > static void noinstr __cpu_do_idle(void) > { > - dsb(sy); > - wfi(); > + const struct cpu_operations *ops = get_cpu_ops(task_cpu(current)); > + > + if (ops->cpu_wfi) { > + ops->cpu_wfi(); > + } else { > + dsb(sy); > + wfi(); > + } > } I think the correct place to put this would be a platform specific driver in drivers/cpuidle/ instead of an added low-level callback in the default idle function and a custom cpu_operations structure. Arnd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-01-21 10:56 UTC|newest] Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-20 13:27 [RFC PATCH 0/7] Linux on Apple Silicon Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-20 13:27 ` [RFC PATCH 1/7] arm64: kernel: FIQ support Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-20 13:27 ` [RFC PATCH 2/7] arm64: kernel: Add a WFI hook Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-20 16:46 ` Alexander Graf 2021-01-20 16:46 ` Alexander Graf [not found] ` <94C20F55-D3B8-4349-B26F-9EA8AAEBF639@caramail.com> 2021-01-21 12:33 ` Hector Martin 'marcan' 2021-01-21 12:33 ` Hector Martin 'marcan' 2021-01-21 10:52 ` Arnd Bergmann [this message] 2021-01-21 10:52 ` Arnd Bergmann 2021-01-21 11:01 ` Mohamed Mediouni 2021-01-21 11:01 ` Mohamed Mediouni 2021-01-21 11:36 ` Arnd Bergmann 2021-01-21 11:36 ` Arnd Bergmann 2021-01-20 13:27 ` [RFC PATCH 3/7] arm64: mm: use nGnRnE instead of nGnRE on Apple processors Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-20 16:47 ` Alexander Graf 2021-01-20 16:47 ` Alexander Graf 2021-01-20 18:06 ` Mohamed Mediouni 2021-01-20 18:06 ` Mohamed Mediouni 2021-01-20 18:10 ` Alexander Graf 2021-01-20 18:10 ` Alexander Graf 2021-01-21 11:27 ` Will Deacon 2021-01-21 11:27 ` Will Deacon 2021-01-21 11:38 ` Arnd Bergmann 2021-01-21 11:38 ` Arnd Bergmann 2021-01-21 11:44 ` Marc Zyngier 2021-01-21 11:44 ` Marc Zyngier 2021-01-21 12:47 ` Will Deacon 2021-01-21 12:47 ` Will Deacon 2021-01-21 15:12 ` Mohamed Mediouni 2021-01-21 15:12 ` Mohamed Mediouni 2021-01-21 16:25 ` Marc Zyngier 2021-01-21 16:25 ` Marc Zyngier 2021-01-21 17:55 ` Will Deacon 2021-01-21 17:55 ` Will Deacon 2021-01-21 18:15 ` Marc Zyngier 2021-01-21 18:15 ` Marc Zyngier 2021-01-21 18:22 ` Mohamed Mediouni 2021-01-21 18:22 ` Mohamed Mediouni 2021-01-21 18:22 ` Will Deacon 2021-01-21 18:22 ` Will Deacon 2021-01-20 13:27 ` [RFC PATCH 4/7] irqchip/apple-aic: Add support for Apple AIC Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-20 17:11 ` Alexander Graf 2021-01-20 17:11 ` Alexander Graf 2021-01-20 18:04 ` Mohamed Mediouni 2021-01-20 18:04 ` Mohamed Mediouni 2021-01-20 20:16 ` Andrew Lunn 2021-01-20 20:16 ` Andrew Lunn 2021-01-20 21:18 ` Stan Skowronek 2021-01-20 21:18 ` Stan Skowronek 2021-01-21 9:48 ` Linus Walleij 2021-01-21 9:48 ` Linus Walleij 2021-01-21 10:37 ` Arnd Bergmann 2021-01-21 10:37 ` Arnd Bergmann 2021-01-21 15:29 ` Hector Martin 'marcan' 2021-01-21 15:29 ` Hector Martin 'marcan' 2021-01-21 17:09 ` Rob Herring 2021-01-21 17:09 ` Rob Herring 2021-01-21 17:45 ` Rob Herring 2021-01-21 17:45 ` Rob Herring 2021-01-21 16:44 ` Rob Herring 2021-01-21 16:44 ` Rob Herring 2021-01-21 16:53 ` Hector Martin 'marcan' 2021-01-21 16:53 ` Hector Martin 'marcan' 2021-01-20 13:27 ` [RFC PATCH 5/7] arm64/Kconfig: Add Apple Silicon SoC platform Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-20 13:27 ` [RFC PATCH 6/7] arm64: kernel: Apple CPU start driver Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-21 11:14 ` Arnd Bergmann 2021-01-21 11:14 ` Arnd Bergmann 2021-01-20 13:27 ` [RFC PATCH 7/7] irqchip/apple-aic: add SMP support to the Apple AIC driver Mohamed Mediouni 2021-01-20 13:27 ` Mohamed Mediouni 2021-01-21 12:44 ` Arnd Bergmann 2021-01-21 12:44 ` Arnd Bergmann 2021-01-21 12:50 ` Mohamed Mediouni 2021-01-21 12:50 ` Mohamed Mediouni 2021-01-21 13:00 ` Arnd Bergmann 2021-01-21 13:00 ` Arnd Bergmann 2021-01-21 13:01 ` Hector Martin 'marcan' 2021-01-21 13:01 ` Hector Martin 'marcan' 2021-01-21 13:22 ` Marc Zyngier 2021-01-21 13:22 ` Marc Zyngier 2021-01-21 13:32 ` Mark Rutland 2021-01-21 13:32 ` Mark Rutland 2021-01-21 14:05 ` Marc Zyngier 2021-01-21 14:05 ` Marc Zyngier 2021-01-21 13:34 ` Mohamed Mediouni 2021-01-21 13:34 ` Mohamed Mediouni 2021-01-21 14:10 ` Marc Zyngier 2021-01-21 14:10 ` Marc Zyngier 2021-01-21 15:09 ` Arnd Bergmann 2021-01-21 15:09 ` Arnd Bergmann 2021-01-21 15:18 ` Mohamed Mediouni 2021-01-21 15:18 ` Mohamed Mediouni 2021-01-21 16:40 ` Rob Herring 2021-01-21 16:40 ` Rob Herring 2021-01-21 16:43 ` Mohamed Mediouni 2021-01-21 16:43 ` Mohamed Mediouni 2021-01-21 17:37 ` Rob Herring 2021-01-21 17:37 ` Rob Herring 2021-01-21 18:08 ` Mohamed Mediouni 2021-01-21 18:08 ` Mohamed Mediouni 2021-01-21 18:57 ` Rob Herring 2021-01-21 18:57 ` Rob Herring 2021-02-02 19:15 ` Linus Walleij 2021-02-02 19:15 ` Linus Walleij
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