[PATCH] ARM: KVM: correctly handle Thumb LS+WB with negative immediate

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Fix typo that would fail to emulate a Thumb load/store with
register writeback with a negative immediate.

See sections A8.8.62 and A8.8.203 of the ARM ARM for details.

Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
 arch/arm/kvm/emulate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/kvm/emulate.c b/arch/arm/kvm/emulate.c
index b4429de..4477e2f 100644
--- a/arch/arm/kvm/emulate.c
+++ b/arch/arm/kvm/emulate.c
@@ -433,7 +433,7 @@ static bool decode_thumb_wb(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,
 	/* Handle Writeback */
 	if (!P && U)
 		*vcpu_reg(vcpu, Rn) = offset_addr + imm8;
-	else if (!P && U)
+	else if (!P && !U)
 		*vcpu_reg(vcpu, Rn) = offset_addr - imm8;
 	return true;
 }
-- 
1.7.12



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