From patchwork Wed Jan 14 16:31:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 5632901 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 130649F444 for ; Wed, 14 Jan 2015 16:35:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 315B6200E9 for ; Wed, 14 Jan 2015 16:35:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 25C1D200E6 for ; Wed, 14 Jan 2015 16:35:00 +0000 (UTC) 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 1YBQrY-0002Iw-4f; Wed, 14 Jan 2015 16:32:08 +0000 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YBQrI-0001qi-A7 for linux-arm-kernel@lists.infradead.org; Wed, 14 Jan 2015 16:31:53 +0000 Received: from e106785-lin.cambridge.arm.com ([10.1.203.153]) by cam-admin0.cambridge.arm.com (8.12.6/8.12.6) with ESMTP id t0EGVOx1021498; Wed, 14 Jan 2015 16:31:26 GMT From: Andre Przywara To: marc.zyngier@arm.com, christoffer.dall@linaro.org Subject: [PATCH v7 11/20] arm/arm64: KVM: refactor/wrap vgic_set/get_attr() Date: Wed, 14 Jan 2015 16:31:15 +0000 Message-Id: <1421253084-9663-12-git-send-email-andre.przywara@arm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1421253084-9663-1-git-send-email-andre.przywara@arm.com> References: <1421253084-9663-1-git-send-email-andre.przywara@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150114_083152_854428_37CDB876 X-CRM114-Status: GOOD ( 12.49 ) X-Spam-Score: -5.0 (-----) Cc: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Eric Auger X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP vgic_set_attr() and vgic_get_attr() contain both code specific for the emulated GIC as well as code for the userland facing, generic part of the GIC. Split the guest GIC facing code of from the generic part to allow easier splitting later. Signed-off-by: Andre Przywara Reviewed-by: Christoffer Dall --- Changelog v6...v7: (none) Changelog v5...v6: (none) Changelog v4...v5: (add Reviewed-by:) Changelog v3...v4: (none) virt/kvm/arm/vgic.c | 78 +++++++++++++++++++++++++++++++++++---------------- 1 file changed, 54 insertions(+), 24 deletions(-) diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 7589e2c..06073fa 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -2440,7 +2440,8 @@ out: return ret; } -static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) +static int vgic_set_common_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) { int r; @@ -2456,17 +2457,6 @@ static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) r = kvm_vgic_addr(dev->kvm, type, &addr, true); return (r == -ENODEV) ? -ENXIO : r; } - - case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: - case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: { - u32 __user *uaddr = (u32 __user *)(long)attr->addr; - u32 reg; - - if (get_user(reg, uaddr)) - return -EFAULT; - - return vgic_attr_regs_access(dev, attr, ®, true); - } case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: { u32 __user *uaddr = (u32 __user *)(long)attr->addr; u32 val; @@ -2510,7 +2500,33 @@ static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) return -ENXIO; } -static int vgic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) +static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) +{ + int ret; + + ret = vgic_set_common_attr(dev, attr); + if (ret != -ENXIO) + return ret; + + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: + case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: { + u32 __user *uaddr = (u32 __user *)(long)attr->addr; + u32 reg; + + if (get_user(reg, uaddr)) + return -EFAULT; + + return vgic_attr_regs_access(dev, attr, ®, true); + } + + } + + return -ENXIO; +} + +static int vgic_get_common_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) { int r = -ENXIO; @@ -2528,27 +2544,41 @@ static int vgic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) return -EFAULT; break; } + case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: { + u32 __user *uaddr = (u32 __user *)(long)attr->addr; + + r = put_user(dev->kvm->arch.vgic.nr_irqs, uaddr); + break; + } + + } + + return r; +} + +static int vgic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) +{ + int ret; + + ret = vgic_get_common_attr(dev, attr); + if (ret != -ENXIO) + return ret; + switch (attr->group) { case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: { u32 __user *uaddr = (u32 __user *)(long)attr->addr; u32 reg = 0; - r = vgic_attr_regs_access(dev, attr, ®, false); - if (r) - return r; - r = put_user(reg, uaddr); - break; - } - case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: { - u32 __user *uaddr = (u32 __user *)(long)attr->addr; - r = put_user(dev->kvm->arch.vgic.nr_irqs, uaddr); - break; + ret = vgic_attr_regs_access(dev, attr, ®, false); + if (ret) + return ret; + return put_user(reg, uaddr); } } - return r; + return -ENXIO; } static int vgic_has_attr_regs(const struct mmio_range *ranges,