From nobody Tue Feb 10 01:50:25 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1511449134309624.8423890064738; Thu, 23 Nov 2017 06:58:54 -0800 (PST) Received: from localhost ([::1]:44745 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eHsxp-0003FN-D1 for importer@patchew.org; Thu, 23 Nov 2017 09:58:53 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40422) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eHsvx-0002AH-D6 for qemu-devel@nongnu.org; Thu, 23 Nov 2017 09:56:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eHsvw-0007wH-Mp for qemu-devel@nongnu.org; Thu, 23 Nov 2017 09:56:57 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53016) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eHsvu-0007rv-OB; Thu, 23 Nov 2017 09:56:54 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 941A87EA9A; Thu, 23 Nov 2017 14:56:53 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-117-138.ams2.redhat.com [10.36.117.138]) by smtp.corp.redhat.com (Postfix) with ESMTP id 627E75D6A5; Thu, 23 Nov 2017 14:56:50 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, peter.maydell@linaro.org, qemu-arm@nongnu.org, qemu-devel@nongnu.org, wanghaibin.wang@huawei.com Date: Thu, 23 Nov 2017 15:56:15 +0100 Message-Id: <1511448975-28326-5-git-send-email-eric.auger@redhat.com> In-Reply-To: <1511448975-28326-1-git-send-email-eric.auger@redhat.com> References: <1511448975-28326-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Thu, 23 Nov 2017 14:56:53 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC v3 4/4] hw/intc/arm_gicv3_its: Implement full reset X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wei@redhat.com, drjones@redhat.com, vijay.kilari@gmail.com, quintela@redhat.com, dgilbert@redhat.com, wu.wubin@huawei.com, christoffer.dall@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 --- 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) =20 c->parent_reset(dev); =20 + 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_a= bort); + return; + } + error_report("ITS KVM: full reset is not supported by the host kernel"= ); =20 if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, --=20 2.5.5