diff options
Diffstat (limited to 'arch/riscv/kvm/vcpu_vector.c')
| -rw-r--r-- | arch/riscv/kvm/vcpu_vector.c | 72 |
1 files changed, 35 insertions, 37 deletions
diff --git a/arch/riscv/kvm/vcpu_vector.c b/arch/riscv/kvm/vcpu_vector.c index edd2eecbddc2..b430cbb69521 100644 --- a/arch/riscv/kvm/vcpu_vector.c +++ b/arch/riscv/kvm/vcpu_vector.c @@ -91,95 +91,93 @@ void kvm_riscv_vcpu_free_vector_context(struct kvm_vcpu *vcpu) } #endif -static void *kvm_riscv_vcpu_vreg_addr(struct kvm_vcpu *vcpu, - unsigned long reg_num, - size_t reg_size) +static int kvm_riscv_vcpu_vreg_addr(struct kvm_vcpu *vcpu, + unsigned long reg_num, + size_t reg_size, + void **reg_addr) { struct kvm_cpu_context *cntx = &vcpu->arch.guest_context; - void *reg_val; size_t vlenb = riscv_v_vsize / 32; if (reg_num < KVM_REG_RISCV_VECTOR_REG(0)) { if (reg_size != sizeof(unsigned long)) - return NULL; + return -EINVAL; switch (reg_num) { case KVM_REG_RISCV_VECTOR_CSR_REG(vstart): - reg_val = &cntx->vector.vstart; + *reg_addr = &cntx->vector.vstart; break; case KVM_REG_RISCV_VECTOR_CSR_REG(vl): - reg_val = &cntx->vector.vl; + *reg_addr = &cntx->vector.vl; break; case KVM_REG_RISCV_VECTOR_CSR_REG(vtype): - reg_val = &cntx->vector.vtype; + *reg_addr = &cntx->vector.vtype; break; case KVM_REG_RISCV_VECTOR_CSR_REG(vcsr): - reg_val = &cntx->vector.vcsr; + *reg_addr = &cntx->vector.vcsr; break; case KVM_REG_RISCV_VECTOR_CSR_REG(datap): default: - return NULL; + return -ENOENT; } } else if (reg_num <= KVM_REG_RISCV_VECTOR_REG(31)) { if (reg_size != vlenb) - return NULL; - reg_val = cntx->vector.datap - + (reg_num - KVM_REG_RISCV_VECTOR_REG(0)) * vlenb; + return -EINVAL; + *reg_addr = cntx->vector.datap + + (reg_num - KVM_REG_RISCV_VECTOR_REG(0)) * vlenb; } else { - return NULL; + return -ENOENT; } - return reg_val; + return 0; } int kvm_riscv_vcpu_get_reg_vector(struct kvm_vcpu *vcpu, - const struct kvm_one_reg *reg, - unsigned long rtype) + const struct kvm_one_reg *reg) { unsigned long *isa = vcpu->arch.isa; unsigned long __user *uaddr = (unsigned long __user *)(unsigned long)reg->addr; unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | - rtype); - void *reg_val = NULL; + KVM_REG_RISCV_VECTOR); size_t reg_size = KVM_REG_SIZE(reg->id); + void *reg_addr; + int rc; - if (rtype == KVM_REG_RISCV_VECTOR && - riscv_isa_extension_available(isa, v)) { - reg_val = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size); - } + if (!riscv_isa_extension_available(isa, v)) + return -ENOENT; - if (!reg_val) - return -EINVAL; + rc = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size, ®_addr); + if (rc) + return rc; - if (copy_to_user(uaddr, reg_val, reg_size)) + if (copy_to_user(uaddr, reg_addr, reg_size)) return -EFAULT; return 0; } int kvm_riscv_vcpu_set_reg_vector(struct kvm_vcpu *vcpu, - const struct kvm_one_reg *reg, - unsigned long rtype) + const struct kvm_one_reg *reg) { unsigned long *isa = vcpu->arch.isa; unsigned long __user *uaddr = (unsigned long __user *)(unsigned long)reg->addr; unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | - rtype); - void *reg_val = NULL; + KVM_REG_RISCV_VECTOR); size_t reg_size = KVM_REG_SIZE(reg->id); + void *reg_addr; + int rc; - if (rtype == KVM_REG_RISCV_VECTOR && - riscv_isa_extension_available(isa, v)) { - reg_val = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size); - } + if (!riscv_isa_extension_available(isa, v)) + return -ENOENT; - if (!reg_val) - return -EINVAL; + rc = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size, ®_addr); + if (rc) + return rc; - if (copy_from_user(reg_val, uaddr, reg_size)) + if (copy_from_user(reg_addr, uaddr, reg_size)) return -EFAULT; return 0; |