[Xen-devel] [Xen-20] Clearing of GICD_ICACTIVER register at boot time.

[cdeshpan <chaitanya.deshpande@xxxxxxxxxx>]

From: Chaitanya Deshpande <chaitanyagd11@xxxxxxxxx>

Signed-off-by: Chaitanya Deshpande <chaitanyagd11@xxxxxxxxx>
---
 xen/arch/arm/gic-v2.c            | 6 +++++-
 xen/arch/arm/gic-v3.c            | 5 +++++
 xen/arch/arm/vgic-v2.c           | 5 +++++
 xen/arch/arm/vgic-v3.c           | 5 +++++
 xen/arch/arm/vgic/vgic-mmio-v2.c | 5 +++++
 5 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/gic-v2.c b/xen/arch/arm/gic-v2.c
index d2dcafb..6bd7e43 100644
--- a/xen/arch/arm/gic-v2.c
+++ b/xen/arch/arm/gic-v2.c
@@ -5,7 +5,6 @@
  *
  * Tim Deegan <tim@xxxxxxx>
  * Copyright (c) 2011 Citrix Systems.
- *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
@@ -1247,6 +1246,11 @@ static int __init gicv2_init(void)
 {
     uint32_t aliased_offset = 0;

+    /* Clear GIC register at boot time */
+    uint32_t *gicd_icactiver;
+    gicd_icactiver = (uint32_t*) GICD_ICACTIVER;
+    *gicd_icactiver = 0;
+
     if ( acpi_disabled )
         gicv2_dt_init();
     else
diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
index b2ed0f8..f61d2b3 100644
--- a/xen/arch/arm/gic-v3.c
+++ b/xen/arch/arm/gic-v3.c
@@ -1738,6 +1738,11 @@ static int __init gicv3_init(void)
     uint32_t reg;
     unsigned int intid_bits;

+    /* Clear GIC register at boot time */
+    uint32_t *gicd_icactiver;
+    gicd_icactiver = (uint32_t*) GICD_ICACTIVER;
+    *gicd_icactiver = 0;
+
     if ( !cpu_has_gicv3 )
     {
         dprintk(XENLOG_ERR, "GICv3: driver requires system register 
support\n");
diff --git a/xen/arch/arm/vgic-v2.c b/xen/arch/arm/vgic-v2.c
index 646d1f3..d8b2761 100644
--- a/xen/arch/arm/vgic-v2.c
+++ b/xen/arch/arm/vgic-v2.c
@@ -727,6 +727,11 @@ static const struct vgic_ops vgic_v2_ops = {

 int vgic_v2_init(struct domain *d, int *mmio_count)
 {
+    /* Clear GIC register at boot time */
+    uint32_t *gicd_icactiver;
+    gicd_icactiver = (uint32_t*) GICD_ICACTIVER;
+    *gicd_icactiver = 0;
+
     if ( !vgic_v2_hw.enabled )
     {
         printk(XENLOG_G_ERR
diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c
index 4b42739..6fe0dac 100644
--- a/xen/arch/arm/vgic-v3.c
+++ b/xen/arch/arm/vgic-v3.c
@@ -1791,6 +1791,11 @@ static const struct vgic_ops v3_ops = {

 int vgic_v3_init(struct domain *d, int *mmio_count)
 {
+    /* Clear GIC register at boot time */
+    uint32_t *gicd_icactiver;
+    gicd_icactiver = (uint32_t*) GICD_ICACTIVER;
+    *gicd_icactiver = 0;
+
     if ( !vgic_v3_hw.enabled )
     {
         printk(XENLOG_G_ERR
diff --git a/xen/arch/arm/vgic/vgic-mmio-v2.c b/xen/arch/arm/vgic/vgic-mmio-v2.c
index 2e507b1..863b4d6 100644
--- a/xen/arch/arm/vgic/vgic-mmio-v2.c
+++ b/xen/arch/arm/vgic/vgic-mmio-v2.c
@@ -305,6 +305,11 @@ static const struct vgic_register_region 
vgic_v2_dist_registers[] = {

 unsigned int vgic_v2_init_dist_iodev(struct vgic_io_device *dev)
 {
+    /* Clear GIC register at boot time */
+    uint32_t *gicd_icactiver;
+    gicd_icactiver = (uint32_t*) GICD_ICACTIVER;
+    *gicd_icactiver = 0;
+
     dev->regions = vgic_v2_dist_registers;
     dev->nr_regions = ARRAY_SIZE(vgic_v2_dist_registers);

--
2.7.4

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