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rcu/context_tracking: Move dynticks_nmi_nesting to context tracking

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The RCU eqs tracking is going to be performed by the context tracking
subsystem. The related nesting counters thus need to be moved to the
context tracking structure.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Uladzislau Rezki <uladzislau.rezki@sony.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Nicolas Saenz Julienne <nsaenz@kernel.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Cc: Yu Liao <liaoyu15@huawei.com>
Cc: Phil Auld <pauld@redhat.com>
Cc: Paul Gortmaker<paul.gortmaker@windriver.com>
Cc: Alex Belits <abelits@marvell.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Tested-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
This commit is contained in:
Frederic Weisbecker
2022-06-08 16:40:31 +02:00
committed by Paul E. McKenney
parent 904e600e60
commit 95e04f48ec
6 changed files with 39 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
include/linux/context_tracking_state.h
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@@ -13,6 +13,9 @@ enum ctx_state {
CONTEXT_GUEST,
};
/* Offset to allow distinguishing irq vs. task-based idle entry/exit. */
#define DYNTICK_IRQ_NONIDLE ((LONG_MAX / 2) + 1)
struct context_tracking {
#ifdef CONFIG_CONTEXT_TRACKING_USER
/*
@@ -28,6 +31,7 @@ struct context_tracking {
#ifdef CONFIG_CONTEXT_TRACKING_IDLE
atomic_t dynticks; /* Even value for idle, else odd. */
long dynticks_nesting; /* Track process nesting level. */
long dynticks_nmi_nesting; /* Track irq/NMI nesting level. */
#endif
};
@@ -66,6 +70,18 @@ static __always_inline long ct_dynticks_nesting_cpu(int cpu)
return ct->dynticks_nesting;
}
static __always_inline long ct_dynticks_nmi_nesting(void)
{
return __this_cpu_read(context_tracking.dynticks_nmi_nesting);
}
static __always_inline long ct_dynticks_nmi_nesting_cpu(int cpu)
{
struct context_tracking *ct = per_cpu_ptr(&context_tracking, cpu);
return ct->dynticks_nmi_nesting;
}
#endif /* #ifdef CONFIG_CONTEXT_TRACKING_IDLE */
#ifdef CONFIG_CONTEXT_TRACKING_USER