From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marc Zyngier , Christoffer Dall , Jonghwan Choi Subject: [ 11/45] ARM: KVM: clear exclusive monitor on all exception returns Date: Sun, 18 Aug 2013 13:36:00 -0700 Message-Id: <20130818203621.775512750@linuxfoundation.org> In-Reply-To: <20130818203620.996166594@linuxfoundation.org> References: <20130818203620.996166594@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marc Zyngier 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 Signed-off-by: Christoffer Dall Signed-off-by: Jonghwan Choi Signed-off-by: Greg Kroah-Hartman --- 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