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From 4a5658befb21d06adda6e6faf5c507990f08d270 Mon Sep 17 00:00:00 2001
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From: Auger Eric <eric.auger@redhat.com>
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Date: Tue, 28 Nov 2017 15:14:08 +0100
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Subject: [PATCH 7/9] hw/intc/arm_gicv3_its: Implement full reset
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RH-Author: Auger Eric <eric.auger@redhat.com>
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Message-id: <1511882048-11256-8-git-send-email-eric.auger@redhat.com>
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Patchwork-id: 77942
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O-Subject: [RHV7.5 qemu-kvm-ma PATCH 7/7] hw/intc/arm_gicv3_its: Implement full reset
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Bugzilla: 1513323
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RH-Acked-by: Andrew Jones <drjones@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Wei Huang <wei@redhat.com>
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Voiding the ITS caches is not supposed to happen via
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individual register writes. So we introduced a dedicated
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ITS KVM device ioctl to perform a cold reset of the ITS:
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KVM_DEV_ARM_VGIC_GRP_CTRL/KVM_DEV_ARM_ITS_CTRL_RESET. Let's
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use this latter if the kernel supports it.
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Signed-off-by: Eric Auger <eric.auger@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/intc/arm_gicv3_its_kvm.c | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
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index 1c663ac..bf290b8 100644
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--- a/hw/intc/arm_gicv3_its_kvm.c
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+++ b/hw/intc/arm_gicv3_its_kvm.c
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@@ -204,7 +204,14 @@ static void kvm_arm_its_reset(DeviceState *dev)
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c->parent_reset(dev);
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- error_report("ITS KVM: full reset is not supported by QEMU");
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+ if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
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+ KVM_DEV_ARM_ITS_CTRL_RESET)) {
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+ kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
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+ KVM_DEV_ARM_ITS_CTRL_RESET, NULL, true, &error_abort);
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+ return;
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+ }
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+
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+ error_report("ITS KVM: full reset is not supported by the host kernel");
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if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
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GITS_CTLR)) {
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--
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1.8.3.1
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