From patchwork Fri Mar 25 02:04:53 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 64450 Delivered-To: patch@linaro.org Received: by 10.112.199.169 with SMTP id jl9csp1000967lbc; Thu, 24 Mar 2016 19:37:13 -0700 (PDT) X-Received: by 10.66.229.35 with SMTP id sn3mr17260916pac.77.1458873433830; Thu, 24 Mar 2016 19:37:13 -0700 (PDT) Return-Path: Received: from bombadil.infradead.org (bombadil.infradead.org. [2001:1868:205::9]) by mx.google.com with ESMTPS id kq10si3387618pab.74.2016.03.24.19.37.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 24 Mar 2016 19:37:13 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) client-ip=2001:1868:205::9; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) smtp.mailfrom=linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ajHbi-0006nB-Cp; Fri, 25 Mar 2016 02:36:14 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ajHGc-0006hI-O5 for linux-arm-kernel@lists.infradead.org; Fri, 25 Mar 2016 02:14:47 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9790659F; Thu, 24 Mar 2016 19:04:51 -0700 (PDT) Received: from e104803-lin.lan (unknown [10.1.203.153]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9CC4E3F3DD; Thu, 24 Mar 2016 19:05:55 -0700 (PDT) From: Andre Przywara To: Christoffer Dall , Marc Zyngier , Eric Auger Subject: [RFC PATCH 30/45] KVM: arm/arm64: vgic-new: vgic_kvm_device: KVM_DEV_ARM_VGIC_GRP_NR_IRQS Date: Fri, 25 Mar 2016 02:04:53 +0000 Message-Id: <1458871508-17279-31-git-send-email-andre.przywara@arm.com> X-Mailer: git-send-email 2.7.3 In-Reply-To: <1458871508-17279-1-git-send-email-andre.przywara@arm.com> References: <1458871508-17279-1-git-send-email-andre.przywara@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160324_191427_430842_3262C477 X-CRM114-Status: GOOD ( 13.52 ) X-Spam-Score: -6.9 (------) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-6.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [217.140.101.70 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org From: Eric Auger This patch implements the KVM_DEV_ARM_VGIC_GRP_NR_IRQS group. This modality is supported by both VGIC V2 and V3 KVM device as will be other groups, hence the introduction of common helpers. Signed-off-by: Eric Auger Signed-off-by: Andre Przywara --- virt/kvm/arm/vgic/vgic_kvm_device.c | 83 +++++++++++++++++++++++++++++++++++-- 1 file changed, 79 insertions(+), 4 deletions(-) -- 2.7.3 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel diff --git a/virt/kvm/arm/vgic/vgic_kvm_device.c b/virt/kvm/arm/vgic/vgic_kvm_device.c index 7c665f9..c96549b 100644 --- a/virt/kvm/arm/vgic/vgic_kvm_device.c +++ b/virt/kvm/arm/vgic/vgic_kvm_device.c @@ -15,9 +15,69 @@ */ #include #include +#include +#include "vgic.h" /* common helpers */ +static int vgic_set_common_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: { + u32 __user *uaddr = (u32 __user *)(long)attr->addr; + u32 val; + int ret = 0; + + if (get_user(val, uaddr)) + return -EFAULT; + + /* + * We require: + * - at least 32 SPIs on top of the 16 SGIs and 16 PPIs + * - at most 1024 interrupts + * - a multiple of 32 interrupts + */ + if (val < (VGIC_NR_PRIVATE_IRQS + 32) || + val > VGIC_MAX_RESERVED || + (val & 31)) + return -EINVAL; + + mutex_lock(&dev->kvm->lock); + + if (vgic_ready(dev->kvm) || dev->kvm->arch.vgic.nr_spis) + ret = -EBUSY; + else + dev->kvm->arch.vgic.nr_spis = + val - VGIC_NR_PRIVATE_IRQS; + + mutex_unlock(&dev->kvm->lock); + + return ret; + } + } + + return -ENXIO; +} + +static int vgic_get_common_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + int r = -ENXIO; + + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: { + u32 __user *uaddr = (u32 __user *)(long)attr->addr; + + r = put_user(dev->kvm->arch.vgic.nr_spis + + VGIC_NR_PRIVATE_IRQS, uaddr); + break; + } + } + + return r; +} + static int vgic_create(struct kvm_device *dev, u32 type) { return kvm_vgic_create(dev->kvm, type); @@ -49,18 +109,29 @@ void kvm_register_vgic_device(unsigned long type) static int vgic_v2_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - return -ENXIO; + int ret; + + ret = vgic_set_common_attr(dev, attr); + return ret; + } static int vgic_v2_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - return -ENXIO; + int ret; + + ret = vgic_get_common_attr(dev, attr); + return ret; } static int vgic_v2_has_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: + return 0; + } return -ENXIO; } @@ -80,18 +151,22 @@ struct kvm_device_ops kvm_arm_vgic_v2_ops = { static int vgic_v3_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - return -ENXIO; + return vgic_set_common_attr(dev, attr); } static int vgic_v3_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - return -ENXIO; + return vgic_get_common_attr(dev, attr); } static int vgic_v3_has_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: + return 0; + } return -ENXIO; }