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[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 <geoffrey.levand@am.sony.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Takao Shinohara 2007-05-01 07:01:07 +10:00 committed by Paul Mackerras
parent dc4f60c25a
commit 0874dd40bf
1 changed files with 11 additions and 0 deletions
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11
arch/powerpc/kernel/irq.c
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@ -67,6 +67,7 @@
#ifdef CONFIG_PPC64
#include <asm/paca.h>
#include <asm/firmware.h>
#include <asm/lv1call.h>
#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 */