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| author | Chris Metcalf <cmetcalf@tilera.com> | 2012-03-29 21:59:11 +0200 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-04-02 18:13:32 +0200 |
| commit | cb210ee3a81afab7c64777635cc18899a2bdd9a5 (patch) | |
| tree | cbce6fcd1f4e7ee47460c4c770916b467bdd6364 /arch | |
| parent | arch/tile: add "nop" after "nap" to help GX idle power draw (diff) | |
| download | linux-cb210ee3a81afab7c64777635cc18899a2bdd9a5.tar.xz linux-cb210ee3a81afab7c64777635cc18899a2bdd9a5.zip | |
arch/tile: implement panic_smp_self_stop()
This allows the later-panicking tiles to wait in a lower power state
until they get interrupted with an smp_send_stop().
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/tile/kernel/smp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/tile/kernel/smp.c b/arch/tile/kernel/smp.c index 7b6df8c27709..91da0f721958 100644 --- a/arch/tile/kernel/smp.c +++ b/arch/tile/kernel/smp.c @@ -113,6 +113,12 @@ void smp_send_stop(void) send_IPI_allbutself(MSG_TAG_STOP_CPU); } +/* On panic, just wait; we may get an smp_send_stop() later on. */ +void panic_smp_self_stop(void) +{ + while (1) + asm("nap; nop"); +} /* * Dispatch code called from hv_message_intr() for HV_MSG_TILE hv messages. |