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hw/intc/arm_gicv3_its: Implement full reset

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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.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1511883692-11511-5-git-send-email-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Eric Auger 2017-12-13 17:59:23 +00:00 committed by Peter Maydell
parent dd8739669f
commit ba2aecabef
1 changed files with 8 additions and 1 deletions
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9
hw/intc/arm_gicv3_its_kvm.c
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@ -204,7 +204,14 @@ static void kvm_arm_its_reset(DeviceState *dev)
c->parent_reset(dev);
error_report("ITS KVM: full reset is not supported by QEMU");
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,
GITS_CTLR)) {