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| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-01-02 13:19:40 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-01-02 13:19:40 -0500 |
| commit | 9cc52627c702b73c633737db40914ab8fc467de8 (patch) | |
| tree | 50dedcb98dcd3c239cddcad006fe815f62046f94 /arch/riscv/kvm/vcpu_vector.c | |
| parent | 731859dde86e23b0f11e700431e460ea76769584 (diff) | |
| parent | aad86da229bc9d0390dc2c02eb0db9ab1f50d059 (diff) | |
| download | linux-stable-9cc52627c702b73c633737db40914ab8fc467de8.tar.gz linux-stable-9cc52627c702b73c633737db40914ab8fc467de8.tar.bz2 linux-stable-9cc52627c702b73c633737db40914ab8fc467de8.zip | |
Merge tag 'kvm-riscv-6.8-1' of https://github.com/kvm-riscv/linux into HEAD
KVM/riscv changes for 6.8 part #1
- KVM_GET_REG_LIST improvement for vector registers
- Generate ISA extension reg_list using macros in get-reg-list selftest
- Steal time account support along with selftest
Diffstat (limited to 'arch/riscv/kvm/vcpu_vector.c')
| -rw-r--r-- | arch/riscv/kvm/vcpu_vector.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/riscv/kvm/vcpu_vector.c b/arch/riscv/kvm/vcpu_vector.c index b339a2682f25..d92d1348045c 100644 --- a/arch/riscv/kvm/vcpu_vector.c +++ b/arch/riscv/kvm/vcpu_vector.c @@ -76,6 +76,7 @@ int kvm_riscv_vcpu_alloc_vector_context(struct kvm_vcpu *vcpu, cntx->vector.datap = kmalloc(riscv_v_vsize, GFP_KERNEL); if (!cntx->vector.datap) return -ENOMEM; + cntx->vector.vlenb = riscv_v_vsize / 32; vcpu->arch.host_context.vector.datap = kzalloc(riscv_v_vsize, GFP_KERNEL); if (!vcpu->arch.host_context.vector.datap) @@ -115,6 +116,9 @@ static int kvm_riscv_vcpu_vreg_addr(struct kvm_vcpu *vcpu, case KVM_REG_RISCV_VECTOR_CSR_REG(vcsr): *reg_addr = &cntx->vector.vcsr; break; + case KVM_REG_RISCV_VECTOR_CSR_REG(vlenb): + *reg_addr = &cntx->vector.vlenb; + break; case KVM_REG_RISCV_VECTOR_CSR_REG(datap): default: return -ENOENT; @@ -173,6 +177,18 @@ int kvm_riscv_vcpu_set_reg_vector(struct kvm_vcpu *vcpu, if (!riscv_isa_extension_available(isa, v)) return -ENOENT; + if (reg_num == KVM_REG_RISCV_VECTOR_CSR_REG(vlenb)) { + struct kvm_cpu_context *cntx = &vcpu->arch.guest_context; + unsigned long reg_val; + + if (copy_from_user(®_val, uaddr, reg_size)) + return -EFAULT; + if (reg_val != cntx->vector.vlenb) + return -EINVAL; + + return 0; + } + rc = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size, ®_addr); if (rc) return rc; |