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Merge branch 'powernv-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

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Pull powerpc non-virtualized cpuidle from Ben Herrenschmidt:
 "This is the branch I mentioned in my other pull request which contains
  our improved cpuidle support for the "powernv" platform
  (non-virtualized).

  It adds support for the "fast sleep" feature of the processor which
  provides higher power savings than our usual "nap" mode but at the
  cost of losing the timers while asleep, and thus exploits the new
  timer broadcast framework to work around that limitation.

  It's based on a tip timer tree that you seem to have already merged"

* 'powernv-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  cpuidle/powernv: Parse device tree to setup idle states
  cpuidle/powernv: Add "Fast-Sleep" CPU idle state
  powerpc/powernv: Add OPAL call to resync timebase on wakeup
  powerpc/powernv: Add context management for Fast Sleep
  powerpc: Split timer_interrupt() into timer handling and interrupt handling routines
  powerpc: Implement tick broadcast IPI as a fixed IPI message
  powerpc: Free up the slot of PPC_MSG_CALL_FUNC_SINGLE IPI message
This commit is contained in:
Linus Torvalds
2014-04-02 13:47:29 -07:00
parent 235c7b9feb 0888839c5b
commit e6d9bfc638
13 changed files with 254 additions and 78 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/include/asm/opal.h
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@@ -161,6 +161,7 @@ extern int opal_enter_rtas(struct rtas_args *args,
#define OPAL_FLASH_VALIDATE 76
#define OPAL_FLASH_MANAGE 77
#define OPAL_FLASH_UPDATE 78
#define OPAL_RESYNC_TIMEBASE 79
#define OPAL_DUMP_INIT 81
#define OPAL_DUMP_INFO 82
#define OPAL_DUMP_READ 83
@@ -923,6 +924,7 @@ extern int opal_machine_check(struct pt_regs *regs);
extern bool opal_mce_check_early_recovery(struct pt_regs *regs);
extern void opal_shutdown(void);
extern int opal_resync_timebase(void);
extern void opal_lpc_init(void);

1
arch/powerpc/include/asm/processor.h
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@@ -450,6 +450,7 @@ enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
extern int powersave_nap; /* set if nap mode can be used in idle loop */
extern void power7_nap(void);
extern void power7_sleep(void);
extern void flush_instruction_cache(void);
extern void hard_reset_now(void);
extern void poweroff_now(void);

2
arch/powerpc/include/asm/smp.h
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@@ -120,7 +120,7 @@ extern int cpu_to_core_id(int cpu);
* in /proc/interrupts will be wrong!!! --Troy */
#define PPC_MSG_CALL_FUNCTION 0
#define PPC_MSG_RESCHEDULE 1
#define PPC_MSG_CALL_FUNC_SINGLE 2
#define PPC_MSG_TICK_BROADCAST 2
#define PPC_MSG_DEBUGGER_BREAK 3
/* for irq controllers that have dedicated ipis per message (4) */

1
arch/powerpc/include/asm/time.h
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@@ -28,6 +28,7 @@ extern struct clock_event_device decrementer_clockevent;
struct rtc_time;
extern void to_tm(int tim, struct rtc_time * tm);
extern void GregorianDay(struct rtc_time *tm);
extern void tick_broadcast_ipi_handler(void);
extern void generic_calibrate_decr(void);