From 0874dd40bf3c1f291da14b2c554c5640c0b6bf1b Mon Sep 17 00:00:00 2001 From: Takao Shinohara Date: Tue, 1 May 2007 07:01:07 +1000 Subject: [PATCH] [POWERPC] PS3: Fix system slowdown The PS3 HV will deliver soft-disabled interrupts at the next HV call or interrupt. Add an HV call to local_irq_restore() to force the timely delivery of any pending interrupts. This fixes the system slowdown bug reported here http://bugzilla.kernel.org/show_bug.cgi?id=8260 Signed-off-by: Geoff Levand Acked-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/irq.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 6c83fe229e60..5719a530f2d1 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -67,6 +67,7 @@ #ifdef CONFIG_PPC64 #include #include +#include #endif int __irq_offset_value; @@ -162,6 +163,16 @@ void local_irq_restore(unsigned long en) local_paca->hard_enabled = en; if ((int)mfspr(SPRN_DEC) < 0) mtspr(SPRN_DEC, 1); + + /* + * Force the delivery of pending soft-disabled interrupts on PS3. + * Any HV call will have this side effect. + */ + if (firmware_has_feature(FW_FEATURE_PS3_LV1)) { + u64 tmp; + lv1_get_version_info(&tmp); + } + hard_irq_enable(); } #endif /* CONFIG_PPC64 */ -- 2.34.1