Voiding the ITS caches is not supposed to happen via
individual register writes. So we introduced a dedicated
ITS KVM device ioctl to perform a cold reset of the ITS:
KVM_DEV_ARM_VGIC_GRP_CTRL/KVM_DEV_ARM_ITS_CTRL_RESET. Let's
use this latter if the kernel supports it.
Signed-off-by: Eric Auger <eric.au...@redhat.com>
---
hw/intc/arm_gicv3_its_kvm.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
index 537cea1..73e2530 100644
--- a/hw/intc/arm_gicv3_its_kvm.c
+++ b/hw/intc/arm_gicv3_its_kvm.c
@@ -215,9 +215,19 @@ static void kvm_arm_its_post_load(GICv3ITSState *s)
static void kvm_arm_its_reset(DeviceState *dev)
{
+ GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
KVMARMITSClass *c = KVM_ARM_ITS_GET_CLASS(s);
c->parent_reset(dev);
+
+ if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_ITS_CTRL_RESET)) {
+ error_report("ITS KVM: reset is not supported by the kernel");
+ return;
+ }
+
+ kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_ITS_CTRL_RESET, NULL, true, &error_abort);
}
static Property kvm_arm_its_props[] = {
--
2.5.5
