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powerpc/64s/idle: Move soft interrupt mask logic into C code

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This simplifies the asm and fixes irq-off tracing over sleep
instructions.

Also move powersave_nap check for POWER8 into C code, and move
PSSCR register value calculation for POWER9 into C.

Reviewed-by: Gautham R. Shenoy <[email protected]>
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
This commit is contained in:
Nicholas Piggin 2017-06-13 23:05:45 +10:00 • committed by Michael Ellerman
commit 2201f994a5
9 changed files with 128 additions and 89 deletions
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12
drivers/cpuidle/cpuidle-powernv.c
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@ -73,9 +73,8 @@ static int nap_loop(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
ppc64_runlatch_off();
power7_idle();
ppc64_runlatch_on();
power7_idle_type(PNV_THREAD_NAP);
return index;
}
@ -98,7 +97,8 @@ static int fastsleep_loop(struct cpuidle_device *dev,
new_lpcr &= ~LPCR_PECE1;
mtspr(SPRN_LPCR, new_lpcr);
power7_sleep();
power7_idle_type(PNV_THREAD_SLEEP);
mtspr(SPRN_LPCR, old_lpcr);
@ -110,10 +110,8 @@ static int stop_loop(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
ppc64_runlatch_off();
power9_idle_stop(stop_psscr_table[index].val,
power9_idle_type(stop_psscr_table[index].val,
stop_psscr_table[index].mask);
ppc64_runlatch_on();
return index;
}