This is a note to let you know that I've just added the patch titled
ARM: KVM: clear exclusive monitor on all exception returns
to the 3.10-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:
arm-kvm-clear-exclusive-monitor-on-all-exception-returns.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 22cfbb6d730ca2fda236b507d9fba17bf002736c Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@xxxxxxx>
Date: Fri, 21 Jun 2013 13:08:48 +0100
Subject: ARM: KVM: clear exclusive monitor on all exception returns
From: Marc Zyngier <marc.zyngier@xxxxxxx>
commit 22cfbb6d730ca2fda236b507d9fba17bf002736c upstream.
Make sure we clear the exclusive monitor on all exception returns,
which otherwise could lead to lock corruptions.
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Signed-off-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/kvm/interrupts.S | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/arm/kvm/interrupts.S
+++ b/arch/arm/kvm/interrupts.S
@@ -292,6 +292,7 @@ THUMB( orr r2, r2, #PSR_T_BIT )
ldr r2, =BSYM(panic)
msr ELR_hyp, r2
ldr r0, =\panic_str
+ clrex @ Clear exclusive monitor
eret
.endm
@@ -441,6 +442,7 @@ guest_trap:
4: pop {r0, r1} @ Failed translation, return to guest
mcrr p15, 0, r0, r1, c7 @ PAR
+ clrex
pop {r0, r1, r2}
eret
@@ -467,6 +469,7 @@ switch_to_guest_vfp:
pop {r3-r7}
pop {r0-r2}
+ clrex
eret
#endif
Patches currently in stable-queue which might be from marc.zyngier@xxxxxxx are
queue-3.10/arm-kvm-clear-exclusive-monitor-on-all-exception-returns.patch
queue-3.10/arm-kvm-add-missing-dsb-before-invalidating-stage-2-tlbs.patch
queue-3.10/arm-kvm-perform-save-restore-of-par.patch
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