3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marc Zyngier <marc.zyng...@arm.com>
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.zyng...@arm.com>
Signed-off-by: Christoffer Dall <christoffer.d...@linaro.org>
Signed-off-by: Jonghwan Choi <jhbird.c...@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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
--
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