From: Samuel Holland <samuel.holland@sifive.com> To: Jisheng Zhang <jszhang@kernel.org> Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Daniel Lezcano <daniel.lezcano@linaro.org>, Thomas Gleixner <tglx@linutronix.de> Subject: Re: [PATCH 2/3] clocksource/drivers/timer-clint: Add set_state_shutdown Date: Wed, 27 Mar 2024 11:30:15 -0500 [thread overview] Message-ID: <4f89f7e4-cd89-42a7-a13e-5eb25f7b2f4e@sifive.com> (raw) In-Reply-To: <20240327153502.2133-3-jszhang@kernel.org> Hi Jisheng, On 2024-03-27 10:35 AM, Jisheng Zhang wrote: > Add clocksource detach/shutdown callback to disable RISC-V timer interrupt when > switching out clockevent from clint timer to another timer. > > Signed-off-by: Jisheng Zhang <jszhang@kernel.org> > --- > drivers/clocksource/timer-clint.c | 18 ++++++++++++++---- > 1 file changed, 14 insertions(+), 4 deletions(-) > > diff --git a/drivers/clocksource/timer-clint.c b/drivers/clocksource/timer-clint.c > index 09fd292eb83d..56cf6c672e6d 100644 > --- a/drivers/clocksource/timer-clint.c > +++ b/drivers/clocksource/timer-clint.c > @@ -119,11 +119,21 @@ static int clint_clock_next_event(unsigned long delta, > return 0; > } > > +static int clint_clock_shutdown(struct clock_event_device *evt) > +{ > + void __iomem *r = clint_timer_cmp + > + cpuid_to_hartid_map(smp_processor_id()); > + > + writeq_relaxed(ULONG_MAX, r); This needs to be ULLONG_MAX to produce a 64-bit value on riscv32. Regards, Samuel > + return 0; > +} > + > static DEFINE_PER_CPU(struct clock_event_device, clint_clock_event) = { > - .name = "clint_clockevent", > - .features = CLOCK_EVT_FEAT_ONESHOT, > - .rating = 100, > - .set_next_event = clint_clock_next_event, > + .name = "clint_clockevent", > + .features = CLOCK_EVT_FEAT_ONESHOT, > + .rating = 100, > + .set_next_event = clint_clock_next_event, > + .set_state_shutdown = clint_clock_shutdown, > }; > > static int clint_timer_starting_cpu(unsigned int cpu)
WARNING: multiple messages have this Message-ID (diff)
From: Samuel Holland <samuel.holland@sifive.com> To: Jisheng Zhang <jszhang@kernel.org> Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Daniel Lezcano <daniel.lezcano@linaro.org>, Thomas Gleixner <tglx@linutronix.de> Subject: Re: [PATCH 2/3] clocksource/drivers/timer-clint: Add set_state_shutdown Date: Wed, 27 Mar 2024 11:30:15 -0500 [thread overview] Message-ID: <4f89f7e4-cd89-42a7-a13e-5eb25f7b2f4e@sifive.com> (raw) In-Reply-To: <20240327153502.2133-3-jszhang@kernel.org> Hi Jisheng, On 2024-03-27 10:35 AM, Jisheng Zhang wrote: > Add clocksource detach/shutdown callback to disable RISC-V timer interrupt when > switching out clockevent from clint timer to another timer. > > Signed-off-by: Jisheng Zhang <jszhang@kernel.org> > --- > drivers/clocksource/timer-clint.c | 18 ++++++++++++++---- > 1 file changed, 14 insertions(+), 4 deletions(-) > > diff --git a/drivers/clocksource/timer-clint.c b/drivers/clocksource/timer-clint.c > index 09fd292eb83d..56cf6c672e6d 100644 > --- a/drivers/clocksource/timer-clint.c > +++ b/drivers/clocksource/timer-clint.c > @@ -119,11 +119,21 @@ static int clint_clock_next_event(unsigned long delta, > return 0; > } > > +static int clint_clock_shutdown(struct clock_event_device *evt) > +{ > + void __iomem *r = clint_timer_cmp + > + cpuid_to_hartid_map(smp_processor_id()); > + > + writeq_relaxed(ULONG_MAX, r); This needs to be ULLONG_MAX to produce a 64-bit value on riscv32. Regards, Samuel > + return 0; > +} > + > static DEFINE_PER_CPU(struct clock_event_device, clint_clock_event) = { > - .name = "clint_clockevent", > - .features = CLOCK_EVT_FEAT_ONESHOT, > - .rating = 100, > - .set_next_event = clint_clock_next_event, > + .name = "clint_clockevent", > + .features = CLOCK_EVT_FEAT_ONESHOT, > + .rating = 100, > + .set_next_event = clint_clock_next_event, > + .set_state_shutdown = clint_clock_shutdown, > }; > > static int clint_timer_starting_cpu(unsigned int cpu) _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2024-03-27 16:30 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-27 15:34 [PATCH 0/3] clocksouce/timer-clint|riscv: some improvements Jisheng Zhang 2024-03-27 15:34 ` Jisheng Zhang 2024-03-27 15:35 ` [PATCH 1/3] clocksource/drivers/timer-riscv: Add set_state_oneshot_stopped Jisheng Zhang 2024-03-27 15:35 ` Jisheng Zhang 2024-03-27 15:35 ` [PATCH 2/3] clocksource/drivers/timer-clint: Add set_state_shutdown Jisheng Zhang 2024-03-27 15:35 ` Jisheng Zhang 2024-03-27 16:30 ` Samuel Holland [this message] 2024-03-27 16:30 ` Samuel Holland 2024-03-27 15:35 ` [PATCH 3/3] clocksource/drivers/timer-clint: Add set_state_oneshot_stopped Jisheng Zhang 2024-03-27 15:35 ` Jisheng Zhang
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