19ed24f4bSMarc Zyngier // SPDX-License-Identifier: GPL-2.0-only 29ed24f4bSMarc Zyngier /* 39ed24f4bSMarc Zyngier * VGIC: KVM DEVICE API 49ed24f4bSMarc Zyngier * 59ed24f4bSMarc Zyngier * Copyright (C) 2015 ARM Ltd. 69ed24f4bSMarc Zyngier * Author: Marc Zyngier <marc.zyngier@arm.com> 79ed24f4bSMarc Zyngier */ 89ed24f4bSMarc Zyngier #include <linux/kvm_host.h> 99ed24f4bSMarc Zyngier #include <kvm/arm_vgic.h> 109ed24f4bSMarc Zyngier #include <linux/uaccess.h> 119ed24f4bSMarc Zyngier #include <asm/kvm_mmu.h> 129ed24f4bSMarc Zyngier #include <asm/cputype.h> 139ed24f4bSMarc Zyngier #include "vgic.h" 149ed24f4bSMarc Zyngier 159ed24f4bSMarc Zyngier /* common helpers */ 169ed24f4bSMarc Zyngier 17f25c5e4dSRicardo Koller int vgic_check_iorange(struct kvm *kvm, phys_addr_t ioaddr, 18f25c5e4dSRicardo Koller phys_addr_t addr, phys_addr_t alignment, 19f25c5e4dSRicardo Koller phys_addr_t size) 20f25c5e4dSRicardo Koller { 21*96e90389SRicardo Koller if (!IS_VGIC_ADDR_UNDEF(ioaddr)) 22*96e90389SRicardo Koller return -EEXIST; 23f25c5e4dSRicardo Koller 24*96e90389SRicardo Koller if (!IS_ALIGNED(addr, alignment) || !IS_ALIGNED(size, alignment)) 25f25c5e4dSRicardo Koller return -EINVAL; 26f25c5e4dSRicardo Koller 27f25c5e4dSRicardo Koller if (addr + size < addr) 28f25c5e4dSRicardo Koller return -EINVAL; 29f25c5e4dSRicardo Koller 30*96e90389SRicardo Koller if (addr & ~kvm_phys_mask(kvm) || addr + size > kvm_phys_size(kvm)) 31f25c5e4dSRicardo Koller return -E2BIG; 32f25c5e4dSRicardo Koller 33f25c5e4dSRicardo Koller return 0; 34f25c5e4dSRicardo Koller } 35f25c5e4dSRicardo Koller 369ed24f4bSMarc Zyngier static int vgic_check_type(struct kvm *kvm, int type_needed) 379ed24f4bSMarc Zyngier { 389ed24f4bSMarc Zyngier if (kvm->arch.vgic.vgic_model != type_needed) 399ed24f4bSMarc Zyngier return -ENODEV; 409ed24f4bSMarc Zyngier else 419ed24f4bSMarc Zyngier return 0; 429ed24f4bSMarc Zyngier } 439ed24f4bSMarc Zyngier 449ed24f4bSMarc Zyngier /** 459ed24f4bSMarc Zyngier * kvm_vgic_addr - set or get vgic VM base addresses 469ed24f4bSMarc Zyngier * @kvm: pointer to the vm struct 479ed24f4bSMarc Zyngier * @type: the VGIC addr type, one of KVM_VGIC_V[23]_ADDR_TYPE_XXX 489ed24f4bSMarc Zyngier * @addr: pointer to address value 499ed24f4bSMarc Zyngier * @write: if true set the address in the VM address space, if false read the 509ed24f4bSMarc Zyngier * address 519ed24f4bSMarc Zyngier * 529ed24f4bSMarc Zyngier * Set or get the vgic base addresses for the distributor and the virtual CPU 539ed24f4bSMarc Zyngier * interface in the VM physical address space. These addresses are properties 549ed24f4bSMarc Zyngier * of the emulated core/SoC and therefore user space initially knows this 559ed24f4bSMarc Zyngier * information. 569ed24f4bSMarc Zyngier * Check them for sanity (alignment, double assignment). We can't check for 579ed24f4bSMarc Zyngier * overlapping regions in case of a virtual GICv3 here, since we don't know 589ed24f4bSMarc Zyngier * the number of VCPUs yet, so we defer this check to map_resources(). 599ed24f4bSMarc Zyngier */ 609ed24f4bSMarc Zyngier int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) 619ed24f4bSMarc Zyngier { 629ed24f4bSMarc Zyngier int r = 0; 639ed24f4bSMarc Zyngier struct vgic_dist *vgic = &kvm->arch.vgic; 64c56a87daSRicardo Koller phys_addr_t *addr_ptr, alignment, size; 659ed24f4bSMarc Zyngier u64 undef_value = VGIC_ADDR_UNDEF; 669ed24f4bSMarc Zyngier 679ed24f4bSMarc Zyngier mutex_lock(&kvm->lock); 689ed24f4bSMarc Zyngier switch (type) { 699ed24f4bSMarc Zyngier case KVM_VGIC_V2_ADDR_TYPE_DIST: 709ed24f4bSMarc Zyngier r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); 719ed24f4bSMarc Zyngier addr_ptr = &vgic->vgic_dist_base; 729ed24f4bSMarc Zyngier alignment = SZ_4K; 73c56a87daSRicardo Koller size = KVM_VGIC_V2_DIST_SIZE; 749ed24f4bSMarc Zyngier break; 759ed24f4bSMarc Zyngier case KVM_VGIC_V2_ADDR_TYPE_CPU: 769ed24f4bSMarc Zyngier r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); 779ed24f4bSMarc Zyngier addr_ptr = &vgic->vgic_cpu_base; 789ed24f4bSMarc Zyngier alignment = SZ_4K; 79c56a87daSRicardo Koller size = KVM_VGIC_V2_CPU_SIZE; 809ed24f4bSMarc Zyngier break; 819ed24f4bSMarc Zyngier case KVM_VGIC_V3_ADDR_TYPE_DIST: 829ed24f4bSMarc Zyngier r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3); 839ed24f4bSMarc Zyngier addr_ptr = &vgic->vgic_dist_base; 849ed24f4bSMarc Zyngier alignment = SZ_64K; 85c56a87daSRicardo Koller size = KVM_VGIC_V3_DIST_SIZE; 869ed24f4bSMarc Zyngier break; 879ed24f4bSMarc Zyngier case KVM_VGIC_V3_ADDR_TYPE_REDIST: { 889ed24f4bSMarc Zyngier struct vgic_redist_region *rdreg; 899ed24f4bSMarc Zyngier 909ed24f4bSMarc Zyngier r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3); 919ed24f4bSMarc Zyngier if (r) 929ed24f4bSMarc Zyngier break; 939ed24f4bSMarc Zyngier if (write) { 949ed24f4bSMarc Zyngier r = vgic_v3_set_redist_base(kvm, 0, *addr, 0); 959ed24f4bSMarc Zyngier goto out; 969ed24f4bSMarc Zyngier } 9794ac0835SEric Auger rdreg = list_first_entry_or_null(&vgic->rd_regions, 989ed24f4bSMarc Zyngier struct vgic_redist_region, list); 999ed24f4bSMarc Zyngier if (!rdreg) 1009ed24f4bSMarc Zyngier addr_ptr = &undef_value; 1019ed24f4bSMarc Zyngier else 1029ed24f4bSMarc Zyngier addr_ptr = &rdreg->base; 1039ed24f4bSMarc Zyngier break; 1049ed24f4bSMarc Zyngier } 1059ed24f4bSMarc Zyngier case KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION: 1069ed24f4bSMarc Zyngier { 1079ed24f4bSMarc Zyngier struct vgic_redist_region *rdreg; 1089ed24f4bSMarc Zyngier u8 index; 1099ed24f4bSMarc Zyngier 1109ed24f4bSMarc Zyngier r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3); 1119ed24f4bSMarc Zyngier if (r) 1129ed24f4bSMarc Zyngier break; 1139ed24f4bSMarc Zyngier 1149ed24f4bSMarc Zyngier index = *addr & KVM_VGIC_V3_RDIST_INDEX_MASK; 1159ed24f4bSMarc Zyngier 1169ed24f4bSMarc Zyngier if (write) { 1179ed24f4bSMarc Zyngier gpa_t base = *addr & KVM_VGIC_V3_RDIST_BASE_MASK; 1189ed24f4bSMarc Zyngier u32 count = (*addr & KVM_VGIC_V3_RDIST_COUNT_MASK) 1199ed24f4bSMarc Zyngier >> KVM_VGIC_V3_RDIST_COUNT_SHIFT; 1209ed24f4bSMarc Zyngier u8 flags = (*addr & KVM_VGIC_V3_RDIST_FLAGS_MASK) 1219ed24f4bSMarc Zyngier >> KVM_VGIC_V3_RDIST_FLAGS_SHIFT; 1229ed24f4bSMarc Zyngier 1239ed24f4bSMarc Zyngier if (!count || flags) 1249ed24f4bSMarc Zyngier r = -EINVAL; 1259ed24f4bSMarc Zyngier else 1269ed24f4bSMarc Zyngier r = vgic_v3_set_redist_base(kvm, index, 1279ed24f4bSMarc Zyngier base, count); 1289ed24f4bSMarc Zyngier goto out; 1299ed24f4bSMarc Zyngier } 1309ed24f4bSMarc Zyngier 1319ed24f4bSMarc Zyngier rdreg = vgic_v3_rdist_region_from_index(kvm, index); 1329ed24f4bSMarc Zyngier if (!rdreg) { 1339ed24f4bSMarc Zyngier r = -ENOENT; 1349ed24f4bSMarc Zyngier goto out; 1359ed24f4bSMarc Zyngier } 1369ed24f4bSMarc Zyngier 1379ed24f4bSMarc Zyngier *addr = index; 1389ed24f4bSMarc Zyngier *addr |= rdreg->base; 1399ed24f4bSMarc Zyngier *addr |= (u64)rdreg->count << KVM_VGIC_V3_RDIST_COUNT_SHIFT; 1409ed24f4bSMarc Zyngier goto out; 1419ed24f4bSMarc Zyngier } 1429ed24f4bSMarc Zyngier default: 1439ed24f4bSMarc Zyngier r = -ENODEV; 1449ed24f4bSMarc Zyngier } 1459ed24f4bSMarc Zyngier 1469ed24f4bSMarc Zyngier if (r) 1479ed24f4bSMarc Zyngier goto out; 1489ed24f4bSMarc Zyngier 1499ed24f4bSMarc Zyngier if (write) { 150c56a87daSRicardo Koller r = vgic_check_iorange(kvm, *addr_ptr, *addr, alignment, size); 1519ed24f4bSMarc Zyngier if (!r) 1529ed24f4bSMarc Zyngier *addr_ptr = *addr; 1539ed24f4bSMarc Zyngier } else { 1549ed24f4bSMarc Zyngier *addr = *addr_ptr; 1559ed24f4bSMarc Zyngier } 1569ed24f4bSMarc Zyngier 1579ed24f4bSMarc Zyngier out: 1589ed24f4bSMarc Zyngier mutex_unlock(&kvm->lock); 1599ed24f4bSMarc Zyngier return r; 1609ed24f4bSMarc Zyngier } 1619ed24f4bSMarc Zyngier 1629ed24f4bSMarc Zyngier static int vgic_set_common_attr(struct kvm_device *dev, 1639ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 1649ed24f4bSMarc Zyngier { 1659ed24f4bSMarc Zyngier int r; 1669ed24f4bSMarc Zyngier 1679ed24f4bSMarc Zyngier switch (attr->group) { 1689ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_ADDR: { 1699ed24f4bSMarc Zyngier u64 __user *uaddr = (u64 __user *)(long)attr->addr; 1709ed24f4bSMarc Zyngier u64 addr; 1719ed24f4bSMarc Zyngier unsigned long type = (unsigned long)attr->attr; 1729ed24f4bSMarc Zyngier 1739ed24f4bSMarc Zyngier if (copy_from_user(&addr, uaddr, sizeof(addr))) 1749ed24f4bSMarc Zyngier return -EFAULT; 1759ed24f4bSMarc Zyngier 1769ed24f4bSMarc Zyngier r = kvm_vgic_addr(dev->kvm, type, &addr, true); 1779ed24f4bSMarc Zyngier return (r == -ENODEV) ? -ENXIO : r; 1789ed24f4bSMarc Zyngier } 1799ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: { 1809ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 1819ed24f4bSMarc Zyngier u32 val; 1829ed24f4bSMarc Zyngier int ret = 0; 1839ed24f4bSMarc Zyngier 1849ed24f4bSMarc Zyngier if (get_user(val, uaddr)) 1859ed24f4bSMarc Zyngier return -EFAULT; 1869ed24f4bSMarc Zyngier 1879ed24f4bSMarc Zyngier /* 1889ed24f4bSMarc Zyngier * We require: 1899ed24f4bSMarc Zyngier * - at least 32 SPIs on top of the 16 SGIs and 16 PPIs 1909ed24f4bSMarc Zyngier * - at most 1024 interrupts 1919ed24f4bSMarc Zyngier * - a multiple of 32 interrupts 1929ed24f4bSMarc Zyngier */ 1939ed24f4bSMarc Zyngier if (val < (VGIC_NR_PRIVATE_IRQS + 32) || 1949ed24f4bSMarc Zyngier val > VGIC_MAX_RESERVED || 1959ed24f4bSMarc Zyngier (val & 31)) 1969ed24f4bSMarc Zyngier return -EINVAL; 1979ed24f4bSMarc Zyngier 1989ed24f4bSMarc Zyngier mutex_lock(&dev->kvm->lock); 1999ed24f4bSMarc Zyngier 2009ed24f4bSMarc Zyngier if (vgic_ready(dev->kvm) || dev->kvm->arch.vgic.nr_spis) 2019ed24f4bSMarc Zyngier ret = -EBUSY; 2029ed24f4bSMarc Zyngier else 2039ed24f4bSMarc Zyngier dev->kvm->arch.vgic.nr_spis = 2049ed24f4bSMarc Zyngier val - VGIC_NR_PRIVATE_IRQS; 2059ed24f4bSMarc Zyngier 2069ed24f4bSMarc Zyngier mutex_unlock(&dev->kvm->lock); 2079ed24f4bSMarc Zyngier 2089ed24f4bSMarc Zyngier return ret; 2099ed24f4bSMarc Zyngier } 2109ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CTRL: { 2119ed24f4bSMarc Zyngier switch (attr->attr) { 2129ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_CTRL_INIT: 2139ed24f4bSMarc Zyngier mutex_lock(&dev->kvm->lock); 2149ed24f4bSMarc Zyngier r = vgic_init(dev->kvm); 2159ed24f4bSMarc Zyngier mutex_unlock(&dev->kvm->lock); 2169ed24f4bSMarc Zyngier return r; 2179ed24f4bSMarc Zyngier } 2189ed24f4bSMarc Zyngier break; 2199ed24f4bSMarc Zyngier } 2209ed24f4bSMarc Zyngier } 2219ed24f4bSMarc Zyngier 2229ed24f4bSMarc Zyngier return -ENXIO; 2239ed24f4bSMarc Zyngier } 2249ed24f4bSMarc Zyngier 2259ed24f4bSMarc Zyngier static int vgic_get_common_attr(struct kvm_device *dev, 2269ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 2279ed24f4bSMarc Zyngier { 2289ed24f4bSMarc Zyngier int r = -ENXIO; 2299ed24f4bSMarc Zyngier 2309ed24f4bSMarc Zyngier switch (attr->group) { 2319ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_ADDR: { 2329ed24f4bSMarc Zyngier u64 __user *uaddr = (u64 __user *)(long)attr->addr; 2339ed24f4bSMarc Zyngier u64 addr; 2349ed24f4bSMarc Zyngier unsigned long type = (unsigned long)attr->attr; 2359ed24f4bSMarc Zyngier 23653b16dd6SEric Auger if (copy_from_user(&addr, uaddr, sizeof(addr))) 23753b16dd6SEric Auger return -EFAULT; 23853b16dd6SEric Auger 2399ed24f4bSMarc Zyngier r = kvm_vgic_addr(dev->kvm, type, &addr, false); 2409ed24f4bSMarc Zyngier if (r) 2419ed24f4bSMarc Zyngier return (r == -ENODEV) ? -ENXIO : r; 2429ed24f4bSMarc Zyngier 2439ed24f4bSMarc Zyngier if (copy_to_user(uaddr, &addr, sizeof(addr))) 2449ed24f4bSMarc Zyngier return -EFAULT; 2459ed24f4bSMarc Zyngier break; 2469ed24f4bSMarc Zyngier } 2479ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: { 2489ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 2499ed24f4bSMarc Zyngier 2509ed24f4bSMarc Zyngier r = put_user(dev->kvm->arch.vgic.nr_spis + 2519ed24f4bSMarc Zyngier VGIC_NR_PRIVATE_IRQS, uaddr); 2529ed24f4bSMarc Zyngier break; 2539ed24f4bSMarc Zyngier } 2549ed24f4bSMarc Zyngier } 2559ed24f4bSMarc Zyngier 2569ed24f4bSMarc Zyngier return r; 2579ed24f4bSMarc Zyngier } 2589ed24f4bSMarc Zyngier 2599ed24f4bSMarc Zyngier static int vgic_create(struct kvm_device *dev, u32 type) 2609ed24f4bSMarc Zyngier { 2619ed24f4bSMarc Zyngier return kvm_vgic_create(dev->kvm, type); 2629ed24f4bSMarc Zyngier } 2639ed24f4bSMarc Zyngier 2649ed24f4bSMarc Zyngier static void vgic_destroy(struct kvm_device *dev) 2659ed24f4bSMarc Zyngier { 2669ed24f4bSMarc Zyngier kfree(dev); 2679ed24f4bSMarc Zyngier } 2689ed24f4bSMarc Zyngier 2699ed24f4bSMarc Zyngier int kvm_register_vgic_device(unsigned long type) 2709ed24f4bSMarc Zyngier { 2719ed24f4bSMarc Zyngier int ret = -ENODEV; 2729ed24f4bSMarc Zyngier 2739ed24f4bSMarc Zyngier switch (type) { 2749ed24f4bSMarc Zyngier case KVM_DEV_TYPE_ARM_VGIC_V2: 2759ed24f4bSMarc Zyngier ret = kvm_register_device_ops(&kvm_arm_vgic_v2_ops, 2769ed24f4bSMarc Zyngier KVM_DEV_TYPE_ARM_VGIC_V2); 2779ed24f4bSMarc Zyngier break; 2789ed24f4bSMarc Zyngier case KVM_DEV_TYPE_ARM_VGIC_V3: 2799ed24f4bSMarc Zyngier ret = kvm_register_device_ops(&kvm_arm_vgic_v3_ops, 2809ed24f4bSMarc Zyngier KVM_DEV_TYPE_ARM_VGIC_V3); 2819ed24f4bSMarc Zyngier 2829ed24f4bSMarc Zyngier if (ret) 2839ed24f4bSMarc Zyngier break; 2849ed24f4bSMarc Zyngier ret = kvm_vgic_register_its_device(); 2859ed24f4bSMarc Zyngier break; 2869ed24f4bSMarc Zyngier } 2879ed24f4bSMarc Zyngier 2889ed24f4bSMarc Zyngier return ret; 2899ed24f4bSMarc Zyngier } 2909ed24f4bSMarc Zyngier 2919ed24f4bSMarc Zyngier int vgic_v2_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr, 2929ed24f4bSMarc Zyngier struct vgic_reg_attr *reg_attr) 2939ed24f4bSMarc Zyngier { 2949ed24f4bSMarc Zyngier int cpuid; 2959ed24f4bSMarc Zyngier 2969ed24f4bSMarc Zyngier cpuid = (attr->attr & KVM_DEV_ARM_VGIC_CPUID_MASK) >> 2979ed24f4bSMarc Zyngier KVM_DEV_ARM_VGIC_CPUID_SHIFT; 2989ed24f4bSMarc Zyngier 2999ed24f4bSMarc Zyngier if (cpuid >= atomic_read(&dev->kvm->online_vcpus)) 3009ed24f4bSMarc Zyngier return -EINVAL; 3019ed24f4bSMarc Zyngier 3029ed24f4bSMarc Zyngier reg_attr->vcpu = kvm_get_vcpu(dev->kvm, cpuid); 3039ed24f4bSMarc Zyngier reg_attr->addr = attr->attr & KVM_DEV_ARM_VGIC_OFFSET_MASK; 3049ed24f4bSMarc Zyngier 3059ed24f4bSMarc Zyngier return 0; 3069ed24f4bSMarc Zyngier } 3079ed24f4bSMarc Zyngier 3089ed24f4bSMarc Zyngier /* unlocks vcpus from @vcpu_lock_idx and smaller */ 3099ed24f4bSMarc Zyngier static void unlock_vcpus(struct kvm *kvm, int vcpu_lock_idx) 3109ed24f4bSMarc Zyngier { 3119ed24f4bSMarc Zyngier struct kvm_vcpu *tmp_vcpu; 3129ed24f4bSMarc Zyngier 3139ed24f4bSMarc Zyngier for (; vcpu_lock_idx >= 0; vcpu_lock_idx--) { 3149ed24f4bSMarc Zyngier tmp_vcpu = kvm_get_vcpu(kvm, vcpu_lock_idx); 3159ed24f4bSMarc Zyngier mutex_unlock(&tmp_vcpu->mutex); 3169ed24f4bSMarc Zyngier } 3179ed24f4bSMarc Zyngier } 3189ed24f4bSMarc Zyngier 3199ed24f4bSMarc Zyngier void unlock_all_vcpus(struct kvm *kvm) 3209ed24f4bSMarc Zyngier { 3219ed24f4bSMarc Zyngier unlock_vcpus(kvm, atomic_read(&kvm->online_vcpus) - 1); 3229ed24f4bSMarc Zyngier } 3239ed24f4bSMarc Zyngier 3249ed24f4bSMarc Zyngier /* Returns true if all vcpus were locked, false otherwise */ 3259ed24f4bSMarc Zyngier bool lock_all_vcpus(struct kvm *kvm) 3269ed24f4bSMarc Zyngier { 3279ed24f4bSMarc Zyngier struct kvm_vcpu *tmp_vcpu; 3289ed24f4bSMarc Zyngier int c; 3299ed24f4bSMarc Zyngier 3309ed24f4bSMarc Zyngier /* 3319ed24f4bSMarc Zyngier * Any time a vcpu is run, vcpu_load is called which tries to grab the 3329ed24f4bSMarc Zyngier * vcpu->mutex. By grabbing the vcpu->mutex of all VCPUs we ensure 3339ed24f4bSMarc Zyngier * that no other VCPUs are run and fiddle with the vgic state while we 3349ed24f4bSMarc Zyngier * access it. 3359ed24f4bSMarc Zyngier */ 3369ed24f4bSMarc Zyngier kvm_for_each_vcpu(c, tmp_vcpu, kvm) { 3379ed24f4bSMarc Zyngier if (!mutex_trylock(&tmp_vcpu->mutex)) { 3389ed24f4bSMarc Zyngier unlock_vcpus(kvm, c - 1); 3399ed24f4bSMarc Zyngier return false; 3409ed24f4bSMarc Zyngier } 3419ed24f4bSMarc Zyngier } 3429ed24f4bSMarc Zyngier 3439ed24f4bSMarc Zyngier return true; 3449ed24f4bSMarc Zyngier } 3459ed24f4bSMarc Zyngier 3469ed24f4bSMarc Zyngier /** 3479ed24f4bSMarc Zyngier * vgic_v2_attr_regs_access - allows user space to access VGIC v2 state 3489ed24f4bSMarc Zyngier * 3499ed24f4bSMarc Zyngier * @dev: kvm device handle 3509ed24f4bSMarc Zyngier * @attr: kvm device attribute 3519ed24f4bSMarc Zyngier * @reg: address the value is read or written 3529ed24f4bSMarc Zyngier * @is_write: true if userspace is writing a register 3539ed24f4bSMarc Zyngier */ 3549ed24f4bSMarc Zyngier static int vgic_v2_attr_regs_access(struct kvm_device *dev, 3559ed24f4bSMarc Zyngier struct kvm_device_attr *attr, 3569ed24f4bSMarc Zyngier u32 *reg, bool is_write) 3579ed24f4bSMarc Zyngier { 3589ed24f4bSMarc Zyngier struct vgic_reg_attr reg_attr; 3599ed24f4bSMarc Zyngier gpa_t addr; 3609ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 3619ed24f4bSMarc Zyngier int ret; 3629ed24f4bSMarc Zyngier 3639ed24f4bSMarc Zyngier ret = vgic_v2_parse_attr(dev, attr, ®_attr); 3649ed24f4bSMarc Zyngier if (ret) 3659ed24f4bSMarc Zyngier return ret; 3669ed24f4bSMarc Zyngier 3679ed24f4bSMarc Zyngier vcpu = reg_attr.vcpu; 3689ed24f4bSMarc Zyngier addr = reg_attr.addr; 3699ed24f4bSMarc Zyngier 3709ed24f4bSMarc Zyngier mutex_lock(&dev->kvm->lock); 3719ed24f4bSMarc Zyngier 3729ed24f4bSMarc Zyngier ret = vgic_init(dev->kvm); 3739ed24f4bSMarc Zyngier if (ret) 3749ed24f4bSMarc Zyngier goto out; 3759ed24f4bSMarc Zyngier 3769ed24f4bSMarc Zyngier if (!lock_all_vcpus(dev->kvm)) { 3779ed24f4bSMarc Zyngier ret = -EBUSY; 3789ed24f4bSMarc Zyngier goto out; 3799ed24f4bSMarc Zyngier } 3809ed24f4bSMarc Zyngier 3819ed24f4bSMarc Zyngier switch (attr->group) { 3829ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: 3839ed24f4bSMarc Zyngier ret = vgic_v2_cpuif_uaccess(vcpu, is_write, addr, reg); 3849ed24f4bSMarc Zyngier break; 3859ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 3869ed24f4bSMarc Zyngier ret = vgic_v2_dist_uaccess(vcpu, is_write, addr, reg); 3879ed24f4bSMarc Zyngier break; 3889ed24f4bSMarc Zyngier default: 3899ed24f4bSMarc Zyngier ret = -EINVAL; 3909ed24f4bSMarc Zyngier break; 3919ed24f4bSMarc Zyngier } 3929ed24f4bSMarc Zyngier 3939ed24f4bSMarc Zyngier unlock_all_vcpus(dev->kvm); 3949ed24f4bSMarc Zyngier out: 3959ed24f4bSMarc Zyngier mutex_unlock(&dev->kvm->lock); 3969ed24f4bSMarc Zyngier return ret; 3979ed24f4bSMarc Zyngier } 3989ed24f4bSMarc Zyngier 3999ed24f4bSMarc Zyngier static int vgic_v2_set_attr(struct kvm_device *dev, 4009ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 4019ed24f4bSMarc Zyngier { 4029ed24f4bSMarc Zyngier int ret; 4039ed24f4bSMarc Zyngier 4049ed24f4bSMarc Zyngier ret = vgic_set_common_attr(dev, attr); 4059ed24f4bSMarc Zyngier if (ret != -ENXIO) 4069ed24f4bSMarc Zyngier return ret; 4079ed24f4bSMarc Zyngier 4089ed24f4bSMarc Zyngier switch (attr->group) { 4099ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 4109ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: { 4119ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 4129ed24f4bSMarc Zyngier u32 reg; 4139ed24f4bSMarc Zyngier 4149ed24f4bSMarc Zyngier if (get_user(reg, uaddr)) 4159ed24f4bSMarc Zyngier return -EFAULT; 4169ed24f4bSMarc Zyngier 4179ed24f4bSMarc Zyngier return vgic_v2_attr_regs_access(dev, attr, ®, true); 4189ed24f4bSMarc Zyngier } 4199ed24f4bSMarc Zyngier } 4209ed24f4bSMarc Zyngier 4219ed24f4bSMarc Zyngier return -ENXIO; 4229ed24f4bSMarc Zyngier } 4239ed24f4bSMarc Zyngier 4249ed24f4bSMarc Zyngier static int vgic_v2_get_attr(struct kvm_device *dev, 4259ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 4269ed24f4bSMarc Zyngier { 4279ed24f4bSMarc Zyngier int ret; 4289ed24f4bSMarc Zyngier 4299ed24f4bSMarc Zyngier ret = vgic_get_common_attr(dev, attr); 4309ed24f4bSMarc Zyngier if (ret != -ENXIO) 4319ed24f4bSMarc Zyngier return ret; 4329ed24f4bSMarc Zyngier 4339ed24f4bSMarc Zyngier switch (attr->group) { 4349ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 4359ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: { 4369ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 4379ed24f4bSMarc Zyngier u32 reg = 0; 4389ed24f4bSMarc Zyngier 4399ed24f4bSMarc Zyngier ret = vgic_v2_attr_regs_access(dev, attr, ®, false); 4409ed24f4bSMarc Zyngier if (ret) 4419ed24f4bSMarc Zyngier return ret; 4429ed24f4bSMarc Zyngier return put_user(reg, uaddr); 4439ed24f4bSMarc Zyngier } 4449ed24f4bSMarc Zyngier } 4459ed24f4bSMarc Zyngier 4469ed24f4bSMarc Zyngier return -ENXIO; 4479ed24f4bSMarc Zyngier } 4489ed24f4bSMarc Zyngier 4499ed24f4bSMarc Zyngier static int vgic_v2_has_attr(struct kvm_device *dev, 4509ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 4519ed24f4bSMarc Zyngier { 4529ed24f4bSMarc Zyngier switch (attr->group) { 4539ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_ADDR: 4549ed24f4bSMarc Zyngier switch (attr->attr) { 4559ed24f4bSMarc Zyngier case KVM_VGIC_V2_ADDR_TYPE_DIST: 4569ed24f4bSMarc Zyngier case KVM_VGIC_V2_ADDR_TYPE_CPU: 4579ed24f4bSMarc Zyngier return 0; 4589ed24f4bSMarc Zyngier } 4599ed24f4bSMarc Zyngier break; 4609ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 4619ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: 4629ed24f4bSMarc Zyngier return vgic_v2_has_attr_regs(dev, attr); 4639ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: 4649ed24f4bSMarc Zyngier return 0; 4659ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CTRL: 4669ed24f4bSMarc Zyngier switch (attr->attr) { 4679ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_CTRL_INIT: 4689ed24f4bSMarc Zyngier return 0; 4699ed24f4bSMarc Zyngier } 4709ed24f4bSMarc Zyngier } 4719ed24f4bSMarc Zyngier return -ENXIO; 4729ed24f4bSMarc Zyngier } 4739ed24f4bSMarc Zyngier 4749ed24f4bSMarc Zyngier struct kvm_device_ops kvm_arm_vgic_v2_ops = { 4759ed24f4bSMarc Zyngier .name = "kvm-arm-vgic-v2", 4769ed24f4bSMarc Zyngier .create = vgic_create, 4779ed24f4bSMarc Zyngier .destroy = vgic_destroy, 4789ed24f4bSMarc Zyngier .set_attr = vgic_v2_set_attr, 4799ed24f4bSMarc Zyngier .get_attr = vgic_v2_get_attr, 4809ed24f4bSMarc Zyngier .has_attr = vgic_v2_has_attr, 4819ed24f4bSMarc Zyngier }; 4829ed24f4bSMarc Zyngier 4839ed24f4bSMarc Zyngier int vgic_v3_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr, 4849ed24f4bSMarc Zyngier struct vgic_reg_attr *reg_attr) 4859ed24f4bSMarc Zyngier { 4869ed24f4bSMarc Zyngier unsigned long vgic_mpidr, mpidr_reg; 4879ed24f4bSMarc Zyngier 4889ed24f4bSMarc Zyngier /* 4899ed24f4bSMarc Zyngier * For KVM_DEV_ARM_VGIC_GRP_DIST_REGS group, 4909ed24f4bSMarc Zyngier * attr might not hold MPIDR. Hence assume vcpu0. 4919ed24f4bSMarc Zyngier */ 4929ed24f4bSMarc Zyngier if (attr->group != KVM_DEV_ARM_VGIC_GRP_DIST_REGS) { 4939ed24f4bSMarc Zyngier vgic_mpidr = (attr->attr & KVM_DEV_ARM_VGIC_V3_MPIDR_MASK) >> 4949ed24f4bSMarc Zyngier KVM_DEV_ARM_VGIC_V3_MPIDR_SHIFT; 4959ed24f4bSMarc Zyngier 4969ed24f4bSMarc Zyngier mpidr_reg = VGIC_TO_MPIDR(vgic_mpidr); 4979ed24f4bSMarc Zyngier reg_attr->vcpu = kvm_mpidr_to_vcpu(dev->kvm, mpidr_reg); 4989ed24f4bSMarc Zyngier } else { 4999ed24f4bSMarc Zyngier reg_attr->vcpu = kvm_get_vcpu(dev->kvm, 0); 5009ed24f4bSMarc Zyngier } 5019ed24f4bSMarc Zyngier 5029ed24f4bSMarc Zyngier if (!reg_attr->vcpu) 5039ed24f4bSMarc Zyngier return -EINVAL; 5049ed24f4bSMarc Zyngier 5059ed24f4bSMarc Zyngier reg_attr->addr = attr->attr & KVM_DEV_ARM_VGIC_OFFSET_MASK; 5069ed24f4bSMarc Zyngier 5079ed24f4bSMarc Zyngier return 0; 5089ed24f4bSMarc Zyngier } 5099ed24f4bSMarc Zyngier 5109ed24f4bSMarc Zyngier /* 5119ed24f4bSMarc Zyngier * vgic_v3_attr_regs_access - allows user space to access VGIC v3 state 5129ed24f4bSMarc Zyngier * 5139ed24f4bSMarc Zyngier * @dev: kvm device handle 5149ed24f4bSMarc Zyngier * @attr: kvm device attribute 5159ed24f4bSMarc Zyngier * @reg: address the value is read or written 5169ed24f4bSMarc Zyngier * @is_write: true if userspace is writing a register 5179ed24f4bSMarc Zyngier */ 5189ed24f4bSMarc Zyngier static int vgic_v3_attr_regs_access(struct kvm_device *dev, 5199ed24f4bSMarc Zyngier struct kvm_device_attr *attr, 5209ed24f4bSMarc Zyngier u64 *reg, bool is_write) 5219ed24f4bSMarc Zyngier { 5229ed24f4bSMarc Zyngier struct vgic_reg_attr reg_attr; 5239ed24f4bSMarc Zyngier gpa_t addr; 5249ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 5259ed24f4bSMarc Zyngier int ret; 5269ed24f4bSMarc Zyngier u32 tmp32; 5279ed24f4bSMarc Zyngier 5289ed24f4bSMarc Zyngier ret = vgic_v3_parse_attr(dev, attr, ®_attr); 5299ed24f4bSMarc Zyngier if (ret) 5309ed24f4bSMarc Zyngier return ret; 5319ed24f4bSMarc Zyngier 5329ed24f4bSMarc Zyngier vcpu = reg_attr.vcpu; 5339ed24f4bSMarc Zyngier addr = reg_attr.addr; 5349ed24f4bSMarc Zyngier 5359ed24f4bSMarc Zyngier mutex_lock(&dev->kvm->lock); 5369ed24f4bSMarc Zyngier 5379ed24f4bSMarc Zyngier if (unlikely(!vgic_initialized(dev->kvm))) { 5389ed24f4bSMarc Zyngier ret = -EBUSY; 5399ed24f4bSMarc Zyngier goto out; 5409ed24f4bSMarc Zyngier } 5419ed24f4bSMarc Zyngier 5429ed24f4bSMarc Zyngier if (!lock_all_vcpus(dev->kvm)) { 5439ed24f4bSMarc Zyngier ret = -EBUSY; 5449ed24f4bSMarc Zyngier goto out; 5459ed24f4bSMarc Zyngier } 5469ed24f4bSMarc Zyngier 5479ed24f4bSMarc Zyngier switch (attr->group) { 5489ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 5499ed24f4bSMarc Zyngier if (is_write) 5509ed24f4bSMarc Zyngier tmp32 = *reg; 5519ed24f4bSMarc Zyngier 5529ed24f4bSMarc Zyngier ret = vgic_v3_dist_uaccess(vcpu, is_write, addr, &tmp32); 5539ed24f4bSMarc Zyngier if (!is_write) 5549ed24f4bSMarc Zyngier *reg = tmp32; 5559ed24f4bSMarc Zyngier break; 5569ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_REDIST_REGS: 5579ed24f4bSMarc Zyngier if (is_write) 5589ed24f4bSMarc Zyngier tmp32 = *reg; 5599ed24f4bSMarc Zyngier 5609ed24f4bSMarc Zyngier ret = vgic_v3_redist_uaccess(vcpu, is_write, addr, &tmp32); 5619ed24f4bSMarc Zyngier if (!is_write) 5629ed24f4bSMarc Zyngier *reg = tmp32; 5639ed24f4bSMarc Zyngier break; 5649ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: { 5659ed24f4bSMarc Zyngier u64 regid; 5669ed24f4bSMarc Zyngier 5679ed24f4bSMarc Zyngier regid = (attr->attr & KVM_DEV_ARM_VGIC_SYSREG_INSTR_MASK); 5689ed24f4bSMarc Zyngier ret = vgic_v3_cpu_sysregs_uaccess(vcpu, is_write, 5699ed24f4bSMarc Zyngier regid, reg); 5709ed24f4bSMarc Zyngier break; 5719ed24f4bSMarc Zyngier } 5729ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: { 5739ed24f4bSMarc Zyngier unsigned int info, intid; 5749ed24f4bSMarc Zyngier 5759ed24f4bSMarc Zyngier info = (attr->attr & KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_MASK) >> 5769ed24f4bSMarc Zyngier KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT; 5779ed24f4bSMarc Zyngier if (info == VGIC_LEVEL_INFO_LINE_LEVEL) { 5789ed24f4bSMarc Zyngier intid = attr->attr & 5799ed24f4bSMarc Zyngier KVM_DEV_ARM_VGIC_LINE_LEVEL_INTID_MASK; 5809ed24f4bSMarc Zyngier ret = vgic_v3_line_level_info_uaccess(vcpu, is_write, 5819ed24f4bSMarc Zyngier intid, reg); 5829ed24f4bSMarc Zyngier } else { 5839ed24f4bSMarc Zyngier ret = -EINVAL; 5849ed24f4bSMarc Zyngier } 5859ed24f4bSMarc Zyngier break; 5869ed24f4bSMarc Zyngier } 5879ed24f4bSMarc Zyngier default: 5889ed24f4bSMarc Zyngier ret = -EINVAL; 5899ed24f4bSMarc Zyngier break; 5909ed24f4bSMarc Zyngier } 5919ed24f4bSMarc Zyngier 5929ed24f4bSMarc Zyngier unlock_all_vcpus(dev->kvm); 5939ed24f4bSMarc Zyngier out: 5949ed24f4bSMarc Zyngier mutex_unlock(&dev->kvm->lock); 5959ed24f4bSMarc Zyngier return ret; 5969ed24f4bSMarc Zyngier } 5979ed24f4bSMarc Zyngier 5989ed24f4bSMarc Zyngier static int vgic_v3_set_attr(struct kvm_device *dev, 5999ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 6009ed24f4bSMarc Zyngier { 6019ed24f4bSMarc Zyngier int ret; 6029ed24f4bSMarc Zyngier 6039ed24f4bSMarc Zyngier ret = vgic_set_common_attr(dev, attr); 6049ed24f4bSMarc Zyngier if (ret != -ENXIO) 6059ed24f4bSMarc Zyngier return ret; 6069ed24f4bSMarc Zyngier 6079ed24f4bSMarc Zyngier switch (attr->group) { 6089ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 6099ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_REDIST_REGS: { 6109ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 6119ed24f4bSMarc Zyngier u32 tmp32; 6129ed24f4bSMarc Zyngier u64 reg; 6139ed24f4bSMarc Zyngier 6149ed24f4bSMarc Zyngier if (get_user(tmp32, uaddr)) 6159ed24f4bSMarc Zyngier return -EFAULT; 6169ed24f4bSMarc Zyngier 6179ed24f4bSMarc Zyngier reg = tmp32; 6189ed24f4bSMarc Zyngier return vgic_v3_attr_regs_access(dev, attr, ®, true); 6199ed24f4bSMarc Zyngier } 6209ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: { 6219ed24f4bSMarc Zyngier u64 __user *uaddr = (u64 __user *)(long)attr->addr; 6229ed24f4bSMarc Zyngier u64 reg; 6239ed24f4bSMarc Zyngier 6249ed24f4bSMarc Zyngier if (get_user(reg, uaddr)) 6259ed24f4bSMarc Zyngier return -EFAULT; 6269ed24f4bSMarc Zyngier 6279ed24f4bSMarc Zyngier return vgic_v3_attr_regs_access(dev, attr, ®, true); 6289ed24f4bSMarc Zyngier } 6299ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: { 6309ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 6319ed24f4bSMarc Zyngier u64 reg; 6329ed24f4bSMarc Zyngier u32 tmp32; 6339ed24f4bSMarc Zyngier 6349ed24f4bSMarc Zyngier if (get_user(tmp32, uaddr)) 6359ed24f4bSMarc Zyngier return -EFAULT; 6369ed24f4bSMarc Zyngier 6379ed24f4bSMarc Zyngier reg = tmp32; 6389ed24f4bSMarc Zyngier return vgic_v3_attr_regs_access(dev, attr, ®, true); 6399ed24f4bSMarc Zyngier } 6409ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CTRL: { 6419ed24f4bSMarc Zyngier int ret; 6429ed24f4bSMarc Zyngier 6439ed24f4bSMarc Zyngier switch (attr->attr) { 6449ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES: 6459ed24f4bSMarc Zyngier mutex_lock(&dev->kvm->lock); 6469ed24f4bSMarc Zyngier 6479ed24f4bSMarc Zyngier if (!lock_all_vcpus(dev->kvm)) { 6489ed24f4bSMarc Zyngier mutex_unlock(&dev->kvm->lock); 6499ed24f4bSMarc Zyngier return -EBUSY; 6509ed24f4bSMarc Zyngier } 6519ed24f4bSMarc Zyngier ret = vgic_v3_save_pending_tables(dev->kvm); 6529ed24f4bSMarc Zyngier unlock_all_vcpus(dev->kvm); 6539ed24f4bSMarc Zyngier mutex_unlock(&dev->kvm->lock); 6549ed24f4bSMarc Zyngier return ret; 6559ed24f4bSMarc Zyngier } 6569ed24f4bSMarc Zyngier break; 6579ed24f4bSMarc Zyngier } 6589ed24f4bSMarc Zyngier } 6599ed24f4bSMarc Zyngier return -ENXIO; 6609ed24f4bSMarc Zyngier } 6619ed24f4bSMarc Zyngier 6629ed24f4bSMarc Zyngier static int vgic_v3_get_attr(struct kvm_device *dev, 6639ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 6649ed24f4bSMarc Zyngier { 6659ed24f4bSMarc Zyngier int ret; 6669ed24f4bSMarc Zyngier 6679ed24f4bSMarc Zyngier ret = vgic_get_common_attr(dev, attr); 6689ed24f4bSMarc Zyngier if (ret != -ENXIO) 6699ed24f4bSMarc Zyngier return ret; 6709ed24f4bSMarc Zyngier 6719ed24f4bSMarc Zyngier switch (attr->group) { 6729ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 6739ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_REDIST_REGS: { 6749ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 6759ed24f4bSMarc Zyngier u64 reg; 6769ed24f4bSMarc Zyngier u32 tmp32; 6779ed24f4bSMarc Zyngier 6789ed24f4bSMarc Zyngier ret = vgic_v3_attr_regs_access(dev, attr, ®, false); 6799ed24f4bSMarc Zyngier if (ret) 6809ed24f4bSMarc Zyngier return ret; 6819ed24f4bSMarc Zyngier tmp32 = reg; 6829ed24f4bSMarc Zyngier return put_user(tmp32, uaddr); 6839ed24f4bSMarc Zyngier } 6849ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: { 6859ed24f4bSMarc Zyngier u64 __user *uaddr = (u64 __user *)(long)attr->addr; 6869ed24f4bSMarc Zyngier u64 reg; 6879ed24f4bSMarc Zyngier 6889ed24f4bSMarc Zyngier ret = vgic_v3_attr_regs_access(dev, attr, ®, false); 6899ed24f4bSMarc Zyngier if (ret) 6909ed24f4bSMarc Zyngier return ret; 6919ed24f4bSMarc Zyngier return put_user(reg, uaddr); 6929ed24f4bSMarc Zyngier } 6939ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: { 6949ed24f4bSMarc Zyngier u32 __user *uaddr = (u32 __user *)(long)attr->addr; 6959ed24f4bSMarc Zyngier u64 reg; 6969ed24f4bSMarc Zyngier u32 tmp32; 6979ed24f4bSMarc Zyngier 6989ed24f4bSMarc Zyngier ret = vgic_v3_attr_regs_access(dev, attr, ®, false); 6999ed24f4bSMarc Zyngier if (ret) 7009ed24f4bSMarc Zyngier return ret; 7019ed24f4bSMarc Zyngier tmp32 = reg; 7029ed24f4bSMarc Zyngier return put_user(tmp32, uaddr); 7039ed24f4bSMarc Zyngier } 7049ed24f4bSMarc Zyngier } 7059ed24f4bSMarc Zyngier return -ENXIO; 7069ed24f4bSMarc Zyngier } 7079ed24f4bSMarc Zyngier 7089ed24f4bSMarc Zyngier static int vgic_v3_has_attr(struct kvm_device *dev, 7099ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 7109ed24f4bSMarc Zyngier { 7119ed24f4bSMarc Zyngier switch (attr->group) { 7129ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_ADDR: 7139ed24f4bSMarc Zyngier switch (attr->attr) { 7149ed24f4bSMarc Zyngier case KVM_VGIC_V3_ADDR_TYPE_DIST: 7159ed24f4bSMarc Zyngier case KVM_VGIC_V3_ADDR_TYPE_REDIST: 7169ed24f4bSMarc Zyngier case KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION: 7179ed24f4bSMarc Zyngier return 0; 7189ed24f4bSMarc Zyngier } 7199ed24f4bSMarc Zyngier break; 7209ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: 7219ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_REDIST_REGS: 7229ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: 7239ed24f4bSMarc Zyngier return vgic_v3_has_attr_regs(dev, attr); 7249ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: 7259ed24f4bSMarc Zyngier return 0; 7269ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: { 7279ed24f4bSMarc Zyngier if (((attr->attr & KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_MASK) >> 7289ed24f4bSMarc Zyngier KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT) == 7299ed24f4bSMarc Zyngier VGIC_LEVEL_INFO_LINE_LEVEL) 7309ed24f4bSMarc Zyngier return 0; 7319ed24f4bSMarc Zyngier break; 7329ed24f4bSMarc Zyngier } 7339ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_GRP_CTRL: 7349ed24f4bSMarc Zyngier switch (attr->attr) { 7359ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_CTRL_INIT: 7369ed24f4bSMarc Zyngier return 0; 7379ed24f4bSMarc Zyngier case KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES: 7389ed24f4bSMarc Zyngier return 0; 7399ed24f4bSMarc Zyngier } 7409ed24f4bSMarc Zyngier } 7419ed24f4bSMarc Zyngier return -ENXIO; 7429ed24f4bSMarc Zyngier } 7439ed24f4bSMarc Zyngier 7449ed24f4bSMarc Zyngier struct kvm_device_ops kvm_arm_vgic_v3_ops = { 7459ed24f4bSMarc Zyngier .name = "kvm-arm-vgic-v3", 7469ed24f4bSMarc Zyngier .create = vgic_create, 7479ed24f4bSMarc Zyngier .destroy = vgic_destroy, 7489ed24f4bSMarc Zyngier .set_attr = vgic_v3_set_attr, 7499ed24f4bSMarc Zyngier .get_attr = vgic_v3_get_attr, 7509ed24f4bSMarc Zyngier .has_attr = vgic_v3_has_attr, 7519ed24f4bSMarc Zyngier }; 752