提交 5686f9c3 编写于 作者: D David S. Miller

sparc64: Implement a real set_perf_counter_pending().

When the perf counter subsystem needs to reschedule work out
from an NMI, it invokes set_perf_counter_pending().

This triggers a non-NMI irq which should invoke
perf_counter_do_pending().

Currently this won't trigger because sparc64 won't trigger
the perf counter subsystem from NMIs, but when the HW counter
support is added it will.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 2d0740c4
#ifndef __ASM_SPARC_PERF_COUNTER_H
#define __ASM_SPARC_PERF_COUNTER_H
static inline void set_perf_counter_pending(void) { }
extern void set_perf_counter_pending(void);
#define PERF_COUNTER_INDEX_OFFSET 0
......
......@@ -7,6 +7,8 @@
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/perf_counter.h>
#include <asm/pil.h>
#include <asm/pcr.h>
#include <asm/nmi.h>
......@@ -34,10 +36,20 @@ unsigned int picl_shift;
*/
void deferred_pcr_work_irq(int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs;
clear_softint(1 << PIL_DEFERRED_PCR_WORK);
old_regs = set_irq_regs(regs);
irq_enter();
#ifdef CONFIG_PERF_COUNTERS
perf_counter_do_pending();
#endif
irq_exit();
set_irq_regs(old_regs);
}
void schedule_deferred_pcr_work(void)
void set_perf_counter_pending(void)
{
set_softint(1 << PIL_DEFERRED_PCR_WORK);
}
......
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