| /* |
| * Copyright (C) 2012 - Virtual Open Systems and Columbia University |
| * Author: Christoffer Dall <c.dall@virtualopensystems.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License, version 2, as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/err.h> |
| #include <linux/kvm_host.h> |
| #include <linux/module.h> |
| #include <linux/vmalloc.h> |
| #include <linux/fs.h> |
| #include <kvm/arm_psci.h> |
| #include <asm/cputype.h> |
| #include <linux/uaccess.h> |
| #include <asm/kvm.h> |
| #include <asm/kvm_emulate.h> |
| #include <asm/kvm_coproc.h> |
| |
| #define VM_STAT(x) { #x, offsetof(struct kvm, stat.x), KVM_STAT_VM } |
| #define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU } |
| |
| struct kvm_stats_debugfs_item debugfs_entries[] = { |
| VCPU_STAT(hvc_exit_stat), |
| VCPU_STAT(wfe_exit_stat), |
| VCPU_STAT(wfi_exit_stat), |
| VCPU_STAT(mmio_exit_user), |
| VCPU_STAT(mmio_exit_kernel), |
| VCPU_STAT(exits), |
| { NULL } |
| }; |
| |
| int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| { |
| return 0; |
| } |
| |
| static u64 core_reg_offset_from_id(u64 id) |
| { |
| return id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | KVM_REG_ARM_CORE); |
| } |
| |
| static int get_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) |
| { |
| u32 __user *uaddr = (u32 __user *)(long)reg->addr; |
| struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs; |
| u64 off; |
| |
| if (KVM_REG_SIZE(reg->id) != 4) |
| return -ENOENT; |
| |
| /* Our ID is an index into the kvm_regs struct. */ |
| off = core_reg_offset_from_id(reg->id); |
| if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id)) |
| return -ENOENT; |
| |
| return put_user(((u32 *)regs)[off], uaddr); |
| } |
| |
| static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) |
| { |
| u32 __user *uaddr = (u32 __user *)(long)reg->addr; |
| struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs; |
| u64 off, val; |
| |
| if (KVM_REG_SIZE(reg->id) != 4) |
| return -ENOENT; |
| |
| /* Our ID is an index into the kvm_regs struct. */ |
| off = core_reg_offset_from_id(reg->id); |
| if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id)) |
| return -ENOENT; |
| |
| if (get_user(val, uaddr) != 0) |
| return -EFAULT; |
| |
| if (off == KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr)) { |
| unsigned long mode = val & MODE_MASK; |
| switch (mode) { |
| case USR_MODE: |
| case FIQ_MODE: |
| case IRQ_MODE: |
| case SVC_MODE: |
| case ABT_MODE: |
| case UND_MODE: |
| break; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| ((u32 *)regs)[off] = val; |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| { |
| return -EINVAL; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| { |
| return -EINVAL; |
| } |
| |
| #define NUM_TIMER_REGS 3 |
| |
| static bool is_timer_reg(u64 index) |
| { |
| switch (index) { |
| case KVM_REG_ARM_TIMER_CTL: |
| case KVM_REG_ARM_TIMER_CNT: |
| case KVM_REG_ARM_TIMER_CVAL: |
| return true; |
| } |
| return false; |
| } |
| |
| static int copy_timer_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) |
| { |
| if (put_user(KVM_REG_ARM_TIMER_CTL, uindices)) |
| return -EFAULT; |
| uindices++; |
| if (put_user(KVM_REG_ARM_TIMER_CNT, uindices)) |
| return -EFAULT; |
| uindices++; |
| if (put_user(KVM_REG_ARM_TIMER_CVAL, uindices)) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| static int set_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) |
| { |
| void __user *uaddr = (void __user *)(long)reg->addr; |
| u64 val; |
| int ret; |
| |
| ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id)); |
| if (ret != 0) |
| return -EFAULT; |
| |
| return kvm_arm_timer_set_reg(vcpu, reg->id, val); |
| } |
| |
| static int get_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) |
| { |
| void __user *uaddr = (void __user *)(long)reg->addr; |
| u64 val; |
| |
| val = kvm_arm_timer_get_reg(vcpu, reg->id); |
| return copy_to_user(uaddr, &val, KVM_REG_SIZE(reg->id)) ? -EFAULT : 0; |
| } |
| |
| static unsigned long num_core_regs(void) |
| { |
| return sizeof(struct kvm_regs) / sizeof(u32); |
| } |
| |
| /** |
| * kvm_arm_num_regs - how many registers do we present via KVM_GET_ONE_REG |
| * |
| * This is for all registers. |
| */ |
| unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu) |
| { |
| return num_core_regs() + kvm_arm_num_coproc_regs(vcpu) |
| + kvm_arm_get_fw_num_regs(vcpu) |
| + NUM_TIMER_REGS; |
| } |
| |
| /** |
| * kvm_arm_copy_reg_indices - get indices of all registers. |
| * |
| * We do core registers right here, then we append coproc regs. |
| */ |
| int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) |
| { |
| unsigned int i; |
| const u64 core_reg = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_CORE; |
| int ret; |
| |
| for (i = 0; i < sizeof(struct kvm_regs)/sizeof(u32); i++) { |
| if (put_user(core_reg | i, uindices)) |
| return -EFAULT; |
| uindices++; |
| } |
| |
| ret = kvm_arm_copy_fw_reg_indices(vcpu, uindices); |
| if (ret) |
| return ret; |
| uindices += kvm_arm_get_fw_num_regs(vcpu); |
| |
| ret = copy_timer_indices(vcpu, uindices); |
| if (ret) |
| return ret; |
| uindices += NUM_TIMER_REGS; |
| |
| return kvm_arm_copy_coproc_indices(vcpu, uindices); |
| } |
| |
| int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) |
| { |
| /* We currently use nothing arch-specific in upper 32 bits */ |
| if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32) |
| return -EINVAL; |
| |
| /* Register group 16 means we want a core register. */ |
| if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE) |
| return get_core_reg(vcpu, reg); |
| |
| if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_FW) |
| return kvm_arm_get_fw_reg(vcpu, reg); |
| |
| if (is_timer_reg(reg->id)) |
| return get_timer_reg(vcpu, reg); |
| |
| return kvm_arm_coproc_get_reg(vcpu, reg); |
| } |
| |
| int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) |
| { |
| /* We currently use nothing arch-specific in upper 32 bits */ |
| if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32) |
| return -EINVAL; |
| |
| /* Register group 16 means we set a core register. */ |
| if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE) |
| return set_core_reg(vcpu, reg); |
| |
| if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_FW) |
| return kvm_arm_set_fw_reg(vcpu, reg); |
| |
| if (is_timer_reg(reg->id)) |
| return set_timer_reg(vcpu, reg); |
| |
| return kvm_arm_coproc_set_reg(vcpu, reg); |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| return -EINVAL; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| return -EINVAL; |
| } |
| |
| |
| int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, |
| struct kvm_vcpu_events *events) |
| { |
| events->exception.serror_pending = !!(*vcpu_hcr(vcpu) & HCR_VA); |
| |
| return 0; |
| } |
| |
| int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, |
| struct kvm_vcpu_events *events) |
| { |
| bool serror_pending = events->exception.serror_pending; |
| bool has_esr = events->exception.serror_has_esr; |
| |
| if (serror_pending && has_esr) |
| return -EINVAL; |
| else if (serror_pending) |
| kvm_inject_vabt(vcpu); |
| |
| return 0; |
| } |
| |
| int __attribute_const__ kvm_target_cpu(void) |
| { |
| switch (read_cpuid_part()) { |
| case ARM_CPU_PART_CORTEX_A7: |
| return KVM_ARM_TARGET_CORTEX_A7; |
| case ARM_CPU_PART_CORTEX_A15: |
| return KVM_ARM_TARGET_CORTEX_A15; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init) |
| { |
| int target = kvm_target_cpu(); |
| |
| if (target < 0) |
| return -ENODEV; |
| |
| memset(init, 0, sizeof(*init)); |
| |
| /* |
| * For now, we don't return any features. |
| * In future, we might use features to return target |
| * specific features available for the preferred |
| * target type. |
| */ |
| init->target = (__u32)target; |
| |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| { |
| return -EINVAL; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| { |
| return -EINVAL; |
| } |
| |
| int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| struct kvm_translation *tr) |
| { |
| return -EINVAL; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| struct kvm_guest_debug *dbg) |
| { |
| return -EINVAL; |
| } |
| |
| int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu, |
| struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_ARM_VCPU_TIMER_CTRL: |
| ret = kvm_arm_timer_set_attr(vcpu, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu, |
| struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_ARM_VCPU_TIMER_CTRL: |
| ret = kvm_arm_timer_get_attr(vcpu, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu, |
| struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_ARM_VCPU_TIMER_CTRL: |
| ret = kvm_arm_timer_has_attr(vcpu, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |