This is a note to let you know that I've just added the patch titled
powerpc/power8: Fix secondary CPUs hanging on boot for HV=0
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-power8-fix-secondary-cpus-hanging-on-boot-for-hv-0.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8c2a381734fc9718f127f4aba958e8a7958d4028 Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@xxxxxxxxxxx>
Date: Wed, 24 Apr 2013 21:00:37 +0000
Subject: powerpc/power8: Fix secondary CPUs hanging on boot for HV=0
From: Michael Neuling <mikey@xxxxxxxxxxx>
commit 8c2a381734fc9718f127f4aba958e8a7958d4028 upstream.
In __restore_cpu_power8 we determine if we are HV and if not, we return
before setting HV only resources.
Unfortunately we forgot to restore the link register from r11 before
returning.
This will happen on boot and with secondary CPUs not coming online.
This adds the missing link register restore.
Signed-off-by: Michael Neuling <mikey@xxxxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kernel/cpu_setup_power.S | 1 +
1 file changed, 1 insertion(+)
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -66,6 +66,7 @@ _GLOBAL(__restore_cpu_power8)
bl __init_FSCR
mfmsr r3
rldicl. r0,r3,4,63
+ mtlr r11
beqlr
li r0,0
mtspr SPRN_LPID,r0
Patches currently in stable-queue which might be from mikey@xxxxxxxxxxx are
queue-3.9/powerpc-fix-hardware-irqs-with-mmu-on-exceptions-when-hv-0.patch
queue-3.9/powerpc-power8-fix-secondary-cpus-hanging-on-boot-for-hv-0.patch
queue-3.9/powerpc-add-isync-to-copy_and_flush.patch
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