diff options
| author | Uwe Kleine-König <ukleinek@debian.org> | 2024-10-06 23:51:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-10 13:01:08 +0300 |
| commit | c0bdc6c6a97cdda5627ab9f7e0596720e70d30d5 (patch) | |
| tree | 1158048a7d7a94c92efaa745065d3dfdcf9cb325 | |
| parent | 73e441be033d3ed0bdff09b575da3e7d4606ffc9 (diff) | |
| download | linux-c0bdc6c6a97cdda5627ab9f7e0596720e70d30d5.tar.xz | |
cpufreq: intel_pstate: Make hwp_notify_lock a raw spinlock
commit 8b4865cd904650cbed7f2407e653934c621b8127 upstream.
notify_hwp_interrupt() is called via sysvec_thermal() ->
smp_thermal_vector() -> intel_thermal_interrupt() in hard irq context.
For this reason it must not use a simple spin_lock that sleeps with
PREEMPT_RT enabled. So convert it to a raw spinlock.
Reported-by: xiao sheng wen <atzlinux@sina.com>
Link: https://bugs.debian.org/1076483
Signed-off-by: Uwe Kleine-König <ukleinek@debian.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: xiao sheng wen <atzlinux@sina.com>
Link: https://patch.msgid.link/20240919081121.10784-2-ukleinek@debian.org
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[ukleinek: Backport to v6.10.y]
Signed-off-by: Uwe Kleine-König <ukleinek@debian.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index c31914a9876f..b694e474acec 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1622,7 +1622,7 @@ static void intel_pstate_notify_work(struct work_struct *work) wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_STATUS, 0); } -static DEFINE_SPINLOCK(hwp_notify_lock); +static DEFINE_RAW_SPINLOCK(hwp_notify_lock); static cpumask_t hwp_intr_enable_mask; void notify_hwp_interrupt(void) @@ -1638,7 +1638,7 @@ void notify_hwp_interrupt(void) if (!(value & 0x01)) return; - spin_lock_irqsave(&hwp_notify_lock, flags); + raw_spin_lock_irqsave(&hwp_notify_lock, flags); if (!cpumask_test_cpu(this_cpu, &hwp_intr_enable_mask)) goto ack_intr; @@ -1646,13 +1646,13 @@ void notify_hwp_interrupt(void) schedule_delayed_work(&all_cpu_data[this_cpu]->hwp_notify_work, msecs_to_jiffies(10)); - spin_unlock_irqrestore(&hwp_notify_lock, flags); + raw_spin_unlock_irqrestore(&hwp_notify_lock, flags); return; ack_intr: wrmsrl_safe(MSR_HWP_STATUS, 0); - spin_unlock_irqrestore(&hwp_notify_lock, flags); + raw_spin_unlock_irqrestore(&hwp_notify_lock, flags); } static void intel_pstate_disable_hwp_interrupt(struct cpudata *cpudata) @@ -1665,9 +1665,9 @@ static void intel_pstate_disable_hwp_interrupt(struct cpudata *cpudata) /* wrmsrl_on_cpu has to be outside spinlock as this can result in IPC */ wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x00); - spin_lock_irq(&hwp_notify_lock); + raw_spin_lock_irq(&hwp_notify_lock); cancel_work = cpumask_test_and_clear_cpu(cpudata->cpu, &hwp_intr_enable_mask); - spin_unlock_irq(&hwp_notify_lock); + raw_spin_unlock_irq(&hwp_notify_lock); if (cancel_work) cancel_delayed_work_sync(&cpudata->hwp_notify_work); @@ -1677,10 +1677,10 @@ static void intel_pstate_enable_hwp_interrupt(struct cpudata *cpudata) { /* Enable HWP notification interrupt for guaranteed performance change */ if (boot_cpu_has(X86_FEATURE_HWP_NOTIFY)) { - spin_lock_irq(&hwp_notify_lock); + raw_spin_lock_irq(&hwp_notify_lock); INIT_DELAYED_WORK(&cpudata->hwp_notify_work, intel_pstate_notify_work); cpumask_set_cpu(cpudata->cpu, &hwp_intr_enable_mask); - spin_unlock_irq(&hwp_notify_lock); + raw_spin_unlock_irq(&hwp_notify_lock); /* wrmsrl_on_cpu has to be outside spinlock as this can result in IPC */ wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x01); |