From nobody Tue Oct 28 01:50:40 2025 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; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1527681010603791.6761443096491; Wed, 30 May 2018 04:50:10 -0700 (PDT) Received: from localhost ([::1]:37770 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fNzcH-0007oT-Nl for importer@patchew.org; Wed, 30 May 2018 07:50:09 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49282) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fNzYL-0004pp-BN for qemu-devel@nongnu.org; Wed, 30 May 2018 07:46:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fNzYK-0005C3-Bk for qemu-devel@nongnu.org; Wed, 30 May 2018 07:46:05 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:38288 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fNzYI-0005AO-0h; Wed, 30 May 2018 07:46:02 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 888E15BCBE; Wed, 30 May 2018 11:46:01 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-116-69.ams2.redhat.com [10.36.116.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0099E10EE6C1; Wed, 30 May 2018 11:45:59 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org Date: Wed, 30 May 2018 13:45:37 +0200 Message-Id: <1527680741-2725-5-git-send-email-eric.auger@redhat.com> In-Reply-To: <1527680741-2725-1-git-send-email-eric.auger@redhat.com> References: <1527680741-2725-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Wed, 30 May 2018 11:46:01 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Wed, 30 May 2018 11:46:01 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'eric.auger@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [RFC v3 4/8] hw/intc/arm_gicv3_kvm: Get prepared to handle multiple redist regions 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: marc.zyngier@arm.com, wei@redhat.com, drjones@redhat.com, christoffer.dall@arm.com, zhaoshenglong@huawei.com 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" Let's check if KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION is supported. If not, we check the number of redist region is equal to 1 and use the legacy KVM_VGIC_V3_ADDR_TYPE_REDIST attribute. Otherwise we use the new attribute and allow to register multiple regions to the KVM device. Signed-off-by: Eric Auger Reviewed-by: Peter Maydell --- v2 -> v3: - In kvm_arm_gicv3_realize rename val into add_ormask local variable and add a comment - start the redist region registration from s->nb_redist_regions - 1 downwards --- hw/intc/arm_gicv3_kvm.c | 33 ++++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-) diff --git a/hw/intc/arm_gicv3_kvm.c b/hw/intc/arm_gicv3_kvm.c index 7e76b87..3826ff4 100644 --- a/hw/intc/arm_gicv3_kvm.c +++ b/hw/intc/arm_gicv3_kvm.c @@ -714,6 +714,7 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Err= or **errp) { GICv3State *s =3D KVM_ARM_GICV3(dev); KVMARMGICv3Class *kgc =3D KVM_ARM_GICV3_GET_CLASS(s); + bool multiple_redist_region_allowed; Error *local_err =3D NULL; int i; =20 @@ -750,6 +751,18 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Er= ror **errp) return; } =20 + multiple_redist_region_allowed =3D + kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION); + + if (!multiple_redist_region_allowed && s->nb_redist_regions > 1) { + error_setg(errp, "Multiple VGICv3 redistributor regions are not " + "supported by this host kernel"); + error_append_hint(errp, "A maximum of %d VCPUs can be used", + s->redist_region_count[0]); + return; + } + kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS, 0, &s->num_irq, true, &error_abort); =20 @@ -759,9 +772,23 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Er= ror **errp) =20 kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd, 0); - kvm_arm_register_device(&s->iomem_redist[0], -1, - KVM_DEV_ARM_VGIC_GRP_ADDR, - KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd, 0); + + if (!multiple_redist_region_allowed) { + kvm_arm_register_device(&s->iomem_redist[0], -1, + KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd, 0= ); + } else { + for (i =3D s->nb_redist_regions - 1; i >=3D 0; i--) { + /* Address mask made of the rdist region index and count */ + uint64_t addr_ormask =3D + i | ((uint64_t)s->redist_region_count[i] << 52); + + kvm_arm_register_device(&s->iomem_redist[i], -1, + KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, + s->dev_fd, addr_ormask); + } + } =20 if (kvm_has_gsi_routing()) { /* set up irq routing */ --=20 2.5.5