arm_gicv3_kvm: Fix compile warning

Fix the following warning:

/home/pranith/qemu/hw/intc/arm_gicv3_kvm.c:296:17: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
            if (!c->gicr_ctlr & GICR_CTLR_ENABLE_LPIS) {
                ^             ~
/home/pranith/qemu/hw/intc/arm_gicv3_kvm.c:296:17: note: add parentheses after the '!' to evaluate the bitwise operator first
            if (!c->gicr_ctlr & GICR_CTLR_ENABLE_LPIS) {
                ^
/home/pranith/qemu/hw/intc/arm_gicv3_kvm.c:296:17: note: add parentheses around left hand side expression to silence this warning
            if (!c->gicr_ctlr & GICR_CTLR_ENABLE_LPIS) {
                ^

This logic error meant we were not setting the PTZ
bit when we should -- luckily as the comment suggests
this wouldn't have had any effects beyond making GIC
initialization take a little longer.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-id: 20170829173226.7625-1-bobby.prani@gmail.com
Cc: qemu-stable@nongnu.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 7229ec5825df6b933f150b54a8a2bedd2de1864c)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/hw/intc/arm_gicv3_kvm.c b/hw/intc/arm_gicv3_kvm.c
index 6051c77705e6649dfebcda9cf128792b0190a62c..481fe5405a6115e5ddab8a580afd3a861ef2e462 100644 (file)
--- a/hw/intc/arm_gicv3_kvm.c
+++ b/hw/intc/arm_gicv3_kvm.c
@@ -293,7 +293,7 @@ static void kvm_arm_gicv3_put(GICv3State *s)
             kvm_gicr_access(s, GICR_PROPBASER + 4, ncpu, &regh, true);
 
             reg64 = c->gicr_pendbaser;
-            if (!c->gicr_ctlr & GICR_CTLR_ENABLE_LPIS) {
+            if (!(c->gicr_ctlr & GICR_CTLR_ENABLE_LPIS)) {
                 /* Setting PTZ is advised if LPIs are disabled, to reduce
                  * GIC initialization time.
                  */