From 4a5658befb21d06adda6e6faf5c507990f08d270 Mon Sep 17 00:00:00 2001 From: Auger Eric Date: Tue, 28 Nov 2017 15:14:08 +0100 Subject: [PATCH 7/9] hw/intc/arm_gicv3_its: Implement full reset RH-Author: Auger Eric Message-id: <1511882048-11256-8-git-send-email-eric.auger@redhat.com> Patchwork-id: 77942 O-Subject: [RHV7.5 qemu-kvm-ma PATCH 7/7] hw/intc/arm_gicv3_its: Implement full reset Bugzilla: 1513323 RH-Acked-by: Andrew Jones RH-Acked-by: Miroslav Rezanina RH-Acked-by: Wei Huang 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 Signed-off-by: Miroslav Rezanina --- 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 1c663ac..bf290b8 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)) { -- 1.8.3.1