[POWERPC] PS3: Fix system slowdown (0874dd40) · Commits · 戴 / test

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>

arch/powerpc/kernel/irq.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -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 */

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