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| author | Marc Zyngier <marc.zyngier@arm.com> | 2013-06-21 13:08:48 +0100 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2013-06-26 10:50:05 -0700 |
| commit | 22cfbb6d730ca2fda236b507d9fba17bf002736c (patch) | |
| tree | 538ca8d1d9a8ee6004231fc2d2f0ec67bc0bd7b6 | |
| parent | 479c5ae2f8a55509b691494cd13691d3dc31d102 (diff) | |
| download | linux-22cfbb6d730ca2fda236b507d9fba17bf002736c.tar.gz linux-22cfbb6d730ca2fda236b507d9fba17bf002736c.tar.bz2 linux-22cfbb6d730ca2fda236b507d9fba17bf002736c.zip | |
ARM: KVM: clear exclusive monitor on all exception returns
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@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| -rw-r--r-- | arch/arm/kvm/interrupts.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S index 20e03d969558..16cd4ba5d7fd 100644 --- 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 |