diff options
Diffstat (limited to 'arch/arm64/kvm/vgic-sys-reg-v3.c')
| -rw-r--r-- | arch/arm64/kvm/vgic-sys-reg-v3.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/arch/arm64/kvm/vgic-sys-reg-v3.c b/arch/arm64/kvm/vgic-sys-reg-v3.c index 85a5e1d15e9f..88eb5b049c2c 100644 --- a/arch/arm64/kvm/vgic-sys-reg-v3.c +++ b/arch/arm64/kvm/vgic-sys-reg-v3.c @@ -278,15 +278,21 @@ int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr * return -ENXIO; } -int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, bool is_write, u64 id, - u64 *reg) +int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, + struct kvm_device_attr *attr, + bool is_write) { + u64 __user *uaddr = (u64 __user *)(long)attr->addr; struct sys_reg_params params; const struct sys_reg_desc *r; - u64 sysreg = (id & KVM_DEV_ARM_VGIC_SYSREG_MASK) | KVM_REG_SIZE_U64; + u64 sysreg; - if (is_write) - params.regval = *reg; + sysreg = attr_to_id(attr->attr); + + if (is_write) { + if (get_user(params.regval, uaddr)) + return -EFAULT; + } params.is_write = is_write; r = find_reg_by_id(sysreg, ¶ms, gic_v3_icc_reg_descs, @@ -297,8 +303,10 @@ int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, bool is_write, u64 id, if (!r->access(vcpu, ¶ms, r)) return -EINVAL; - if (!is_write) - *reg = params.regval; + if (!is_write) { + if (put_user(params.regval, uaddr)) + return -EFAULT; + } return 0; } |