[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>
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 6c83fe2..5719a53 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -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 @@
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 */