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[Qemu-devel] [PATCH v4 4/4] hw/intc/arm_gicv3_its: Implement full reset
From: |
Eric Auger |
Subject: |
[Qemu-devel] [PATCH v4 4/4] hw/intc/arm_gicv3_its: Implement full reset |
Date: |
Fri, 24 Nov 2017 14:30:38 +0100 |
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 <address@hidden>
---
hw/intc/arm_gicv3_its_kvm.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
index 83e5268..bad593f 100644
--- a/hw/intc/arm_gicv3_its_kvm.c
+++ b/hw/intc/arm_gicv3_its_kvm.c
@@ -204,6 +204,13 @@ static void kvm_arm_its_reset(DeviceState *dev)
c->parent_reset(dev);
+ if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_ITS_CTRL_RESET)) {
+ kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_ITS_CTRL_RESET, NULL, true,
&error_abort);
+ return;
+ }
+
error_report("ITS KVM: full reset is not supported by the host kernel");
if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
--
2.5.5