From patchwork Fri Aug 23 19:20:01 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoffer Dall X-Patchwork-Id: 2849015 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B6B0EBF546 for ; Fri, 23 Aug 2013 19:22:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 94BB920165 for ; Fri, 23 Aug 2013 19:22:36 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 133582015F for ; Fri, 23 Aug 2013 19:22:35 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VCwvX-0006uW-GX; Fri, 23 Aug 2013 19:21:44 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VCwvB-00045t-VK; Fri, 23 Aug 2013 19:21:21 +0000 Received: from mail-pb0-f49.google.com ([209.85.160.49]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VCwuj-0003zZ-RE for linux-arm-kernel@lists.infradead.org; Fri, 23 Aug 2013 19:20:55 +0000 Received: by mail-pb0-f49.google.com with SMTP id xb4so1029619pbc.36 for ; Fri, 23 Aug 2013 12:20:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=tpcVAF78vh9KXC8SvHDY4cq3Ym6Ajok0GwHRxyFr10M=; b=SSE1OTRNFCyBD13v960JeHbAGgQKoGJSCpopP/sgUf6rx7xF3fxuwU+PLFWL91KiBT BMagaZU5OFVYQ7NbtSqbqD1qEVAmHI0C228d57FXlsi25zlI2FjF+hyQBHhg77MYgvoo h6uxIZ6EisnFhRxWuFB8jeZ1MXBRUbWigXUUbVxkmkw2L5PFnZFSv0+bz7qudg75NmC4 eGS1Ay4ODeCAmPy2PVXgaFaCeElhaqWyMPMoFcVwfA6Hv9SKphCed5fFF7PVPO05ZjtK pVY+Jxp+YKQ3k+p/pyMuj87fCR8il8RUGhbSWbErco01cKIkDXkaBMy5ApeTzzJZ0Zzo 3P6w== X-Gm-Message-State: ALoCoQmLcS7dFnZA4tXPFDhnns1rP5XgXt1JDNiDJROpEpkd0xcbz9tYSIsxpDcuMoLIFzTuZ6ZR X-Received: by 10.68.216.227 with SMTP id ot3mr1341412pbc.80.1377285632003; Fri, 23 Aug 2013 12:20:32 -0700 (PDT) Received: from localhost.localdomain (c-67-169-183-77.hsd1.ca.comcast.net. [67.169.183.77]) by mx.google.com with ESMTPSA id qf7sm2746078pac.14.1969.12.31.16.00.00 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 23 Aug 2013 12:20:31 -0700 (PDT) From: Christoffer Dall To: kvmarm@lists.cs.columbia.edu Subject: [PATCH 3/8] KVM: arm-vgic: Set base addr through device API Date: Fri, 23 Aug 2013 12:20:01 -0700 Message-Id: <1377285606-15692-4-git-send-email-christoffer.dall@linaro.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1377285606-15692-1-git-send-email-christoffer.dall@linaro.org> References: <1377285606-15692-1-git-send-email-christoffer.dall@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130823_152054_059769_0E29D5C6 X-CRM114-Status: GOOD ( 20.76 ) X-Spam-Score: -0.1 (/) Cc: Christoffer Dall , linaro-kernel@lists.linaro.org, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, patches@linaro.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 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=-4.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, SUSPICIOUS_RECIPS, 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 Support setting the distributor and cpu interface base addresses in the VM physical address space through the KVM_{SET,GET}_DEVICE_ATTR API in addition to the ARM specific API. This has the added benefit of being able to share more code in user space and do things in a uniform maner. Also deprecate the older API at the same time, but backwards compatibility will be maintained. Reviewed-by: Alexander Graf Signed-off-by: Christoffer Dall --- Documentation/virtual/kvm/api.txt | 6 +- Documentation/virtual/kvm/devices/arm-vgic.txt | 11 +++ arch/arm/include/uapi/asm/kvm.h | 9 +++ arch/arm/kvm/arm.c | 2 +- include/kvm/arm_vgic.h | 2 +- virt/kvm/arm/vgic.c | 90 ++++++++++++++++++++---- 6 files changed, 105 insertions(+), 15 deletions(-) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index ef925ea..594a3be 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2324,7 +2324,7 @@ This ioctl returns the guest registers that are supported for the KVM_GET_ONE_REG/KVM_SET_ONE_REG calls. -4.84 KVM_ARM_SET_DEVICE_ADDR +4.84 KVM_ARM_SET_DEVICE_ADDR (deprecated) Capability: KVM_CAP_ARM_SET_DEVICE_ADDR Architectures: arm, arm64 @@ -2362,6 +2362,10 @@ must be called after calling KVM_CREATE_IRQCHIP, but before calling KVM_RUN on any of the VCPUs. Calling this ioctl twice for any of the base addresses will return -EEXIST. +Note, this IOCTL is deprecated and the more flexible SET/GET_DEVICE_ATTR API +should be used instead. + + 4.85 KVM_PPC_RTAS_DEFINE_TOKEN Capability: KVM_CAP_PPC_RTAS diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt index 38f27f7..c9febb2 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -8,3 +8,14 @@ Only one VGIC instance may be instantiated through either this API or the legacy KVM_CREATE_IRQCHIP api. The created VGIC will act as the VM interrupt controller, requiring emulated user-space devices to inject interrupts to the VGIC instead of directly to CPUs. + +Groups: + KVM_DEV_ARM_VGIC_GRP_ADDR + Attributes: + KVM_VGIC_V2_ADDR_TYPE_DIST (rw, 64-bit) + Base address in the guest physical address space of the GIC distributor + register mappings. + + KVM_VGIC_V2_ADDR_TYPE_CPU (rw, 64-bit) + Base address in the guest physical address space of the GIC virtual cpu + interface register mappings. diff --git a/arch/arm/include/uapi/asm/kvm.h b/arch/arm/include/uapi/asm/kvm.h index 1c85102..587f1ae 100644 --- a/arch/arm/include/uapi/asm/kvm.h +++ b/arch/arm/include/uapi/asm/kvm.h @@ -142,6 +142,15 @@ struct kvm_arch_memory_slot { #define KVM_REG_ARM_VFP_FPINST 0x1009 #define KVM_REG_ARM_VFP_FPINST2 0x100A +/* Device Control API: ARM VGIC */ +#define KVM_DEV_ARM_VGIC_GRP_ADDR 0 +#define KVM_DEV_ARM_VGIC_GRP_DIST_REGS 1 +#define KVM_DEV_ARM_VGIC_GRP_CPU_REGS 2 +#define KVM_DEV_ARM_VGIC_CPUID_SHIFT 32 +#define KVM_DEV_ARM_VGIC_CPUID_MASK (0xffULL << KVM_DEV_ARM_VGIC_CPUID_SHIFT) +#define KVM_DEV_ARM_VGIC_OFFSET_SHIFT 0 +#define KVM_DEV_ARM_VGIC_OFFSET_MASK (0xffffffffULL << KVM_DEV_ARM_VGIC_OFFSET_SHIFT) + /* KVM_IRQ_LINE irq field index values */ #define KVM_ARM_IRQ_TYPE_SHIFT 24 #define KVM_ARM_IRQ_TYPE_MASK 0xff diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index c7b7474..0208ed1 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -769,7 +769,7 @@ static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, case KVM_ARM_DEVICE_VGIC_V2: if (!vgic_present) return -ENXIO; - return kvm_vgic_set_addr(kvm, type, dev_addr->addr); + return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); default: return -ENODEV; } diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 7e2d158..be85127 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -144,7 +144,7 @@ struct kvm_run; struct kvm_exit_mmio; #ifdef CONFIG_KVM_ARM_VGIC -int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr); +int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write); int kvm_vgic_hyp_init(void); int kvm_vgic_init(struct kvm *kvm); int kvm_vgic_create(struct kvm *kvm); diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 140608a..a51efb8 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -1481,6 +1481,12 @@ static int vgic_ioaddr_assign(struct kvm *kvm, phys_addr_t *ioaddr, { int ret; + if (addr & ~KVM_PHYS_MASK) + return -E2BIG; + + if (addr & (SZ_4K - 1)) + return -EINVAL; + if (!IS_VGIC_ADDR_UNDEF(*ioaddr)) return -EEXIST; if (addr + size < addr) @@ -1493,26 +1499,41 @@ static int vgic_ioaddr_assign(struct kvm *kvm, phys_addr_t *ioaddr, return ret; } -int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr) +/** + * kvm_vgic_addr - set or get vgic VM base addresses + * @kvm: pointer to the vm struct + * @type: the VGIC addr type, one of KVM_VGIC_V2_ADDR_TYPE_XXX + * @addr: pointer to address value + * @write: if true set the address in the VM address space, if false read the + * address + * + * Set or get the vgic base addresses for the distributor and the virtual CPU + * interface in the VM physical address space. These addresses are properties + * of the emulated core/SoC and therefore user space initially knows this + * information. + */ +int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) { int r = 0; struct vgic_dist *vgic = &kvm->arch.vgic; - if (addr & ~KVM_PHYS_MASK) - return -E2BIG; - - if (addr & (SZ_4K - 1)) - return -EINVAL; - mutex_lock(&kvm->lock); switch (type) { case KVM_VGIC_V2_ADDR_TYPE_DIST: - r = vgic_ioaddr_assign(kvm, &vgic->vgic_dist_base, - addr, KVM_VGIC_V2_DIST_SIZE); + if (write) { + r = vgic_ioaddr_assign(kvm, &vgic->vgic_dist_base, + *addr, KVM_VGIC_V2_DIST_SIZE); + } else { + *addr = vgic->vgic_dist_base; + } break; case KVM_VGIC_V2_ADDR_TYPE_CPU: - r = vgic_ioaddr_assign(kvm, &vgic->vgic_cpu_base, - addr, KVM_VGIC_V2_CPU_SIZE); + if (write) { + r = vgic_ioaddr_assign(kvm, &vgic->vgic_cpu_base, + *addr, KVM_VGIC_V2_CPU_SIZE); + } else { + *addr = vgic->vgic_cpu_base; + } break; default: r = -ENODEV; @@ -1524,16 +1545,61 @@ int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr) static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { + int r; + + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_ADDR: { + u64 __user *uaddr = (u64 __user *)(long)attr->addr; + u64 addr; + unsigned long type = (unsigned long)attr->attr; + + if (copy_from_user(&addr, uaddr, sizeof(addr))) + return -EFAULT; + + r = kvm_vgic_addr(dev->kvm, type, &addr, true); + return (r == -ENODEV) ? -ENXIO : r; + } + } + return -ENXIO; } static int vgic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - return -ENXIO; + int r = ENXIO; + + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_ADDR: { + u64 __user *uaddr = (u64 __user *)(long)attr->addr; + u64 addr; + unsigned long type = (unsigned long)attr->attr; + + r = kvm_vgic_addr(dev->kvm, type, &addr, false); + if (r) + return (r == -ENODEV) ? -ENXIO : r; + + r = 0; + if (copy_to_user(uaddr, &addr, sizeof(addr))) + return -EFAULT; + } + } + + return r; } static int vgic_has_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { + phys_addr_t offset; + + switch (attr->group) { + case KVM_DEV_ARM_VGIC_GRP_ADDR: + switch (attr->attr) { + case KVM_VGIC_V2_ADDR_TYPE_DIST: + case KVM_VGIC_V2_ADDR_TYPE_CPU: + return 0; + } + break; + } return -ENXIO; }