[Xen-devel] [PATCH v9a 6/6] xen/arm: Restrict saving of gic register for idle domain

[vijay.kilari@xxxxxxxxx]

From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>

Check for idle domain is missing before saving gic context.
Xen stays in hypervisor mode when idle vcpu is running.
So no need to save and restore context when switched to/from
idle domain

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 xen/arch/arm/gic.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index e1e27b35..c0d70b8 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -70,6 +70,9 @@ void gic_save_state(struct vcpu *v)
 {
     ASSERT(!local_irq_is_enabled());
 
+    if ( is_idle_vcpu(v) )
+        return;
+
     /* No need for spinlocks here because interrupts are disabled around
      * this call and it only accesses struct vcpu fields that cannot be
      * accessed simultaneously by another pCPU.
-- 
1.7.9.5


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