From ba2aecabefc5c06a91c12dd421564afd63f083ff Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Wed, 13 Dec 2017 17:59:23 +0000 Subject: [PATCH] hw/intc/arm_gicv3_its: Implement full reset 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 Reviewed-by: Peter Maydell Message-id: 1511883692-11511-5-git-send-email-eric.auger@redhat.com Signed-off-by: Peter Maydell --- hw/intc/arm_gicv3_its_kvm.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c index 1c663ac28e..bf290b8bff 100644 --- a/hw/intc/arm_gicv3_its_kvm.c +++ b/hw/intc/arm_gicv3_its_kvm.c @@ -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)) {