Re: [PATCH v2 05/12] target/riscv: Implement kvm_arch_put_registers

Put GPR CSR and FP registers to kvm by KVM_SET_ONE_REG ioctl Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com&gt; Signed-off-by: Mingwang Li <limingwang(a)huawei.com&gt; Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com&gt;

--- target/riscv/kvm.c | 104 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 103 insertions(+), 1 deletion(-) diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index 6d4df0ef6d..e695b91dc7 100644 --- a/target/riscv/kvm.c +++ b/target/riscv/kvm.c @@ -73,6 +73,14 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx } \ } while(0) +#define KVM_RISCV_SET_CSR(cs, env, csr, reg) \ + do { \ + int ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, csr), &reg); \ + if (ret) { \ + return ret; \ + } \ + } while(0) + static int kvm_riscv_get_regs_core(CPUState *cs) { int ret = 0; @@ -98,6 +106,31 @@ static int kvm_riscv_get_regs_core(CPUState *cs) return ret; } +static int kvm_riscv_put_regs_core(CPUState *cs) +{ + int ret = 0; + int i; + target_ulong reg; + CPURISCVState *env = &RISCV_CPU(cs)->env; + + reg = env->pc; + ret = kvm_set_one_reg(cs, RISCV_CORE_REG(env, regs.pc), &reg); + if (ret) { + return ret; + } + + for (i = 1; i < 32; i++) { + uint64_t id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, i); + reg = env->gpr[i]; + ret = kvm_set_one_reg(cs, id, &reg); + if (ret) { + return ret; + } + } + + return ret; +} + static int kvm_riscv_get_regs_csr(CPUState *cs) { int ret = 0; @@ -115,6 +148,24 @@ static int kvm_riscv_get_regs_csr(CPUState *cs) return ret; } +static int kvm_riscv_put_regs_csr(CPUState *cs) +{ + int ret = 0; + CPURISCVState *env = &RISCV_CPU(cs)->env; + + KVM_RISCV_SET_CSR(cs, env, sstatus, env->mstatus); + KVM_RISCV_SET_CSR(cs, env, sie, env->mie); + KVM_RISCV_SET_CSR(cs, env, stvec, env->stvec); + KVM_RISCV_SET_CSR(cs, env, sscratch, env->sscratch); + KVM_RISCV_SET_CSR(cs, env, sepc, env->sepc); + KVM_RISCV_SET_CSR(cs, env, scause, env->scause); + KVM_RISCV_SET_CSR(cs, env, stval, env->stval); + KVM_RISCV_SET_CSR(cs, env, sip, env->mip); + KVM_RISCV_SET_CSR(cs, env, satp, env->satp); + + return ret; +} + static int kvm_riscv_get_regs_fp(CPUState *cs) { int ret = 0; @@ -148,6 +199,40 @@ static int kvm_riscv_get_regs_fp(CPUState *cs) return ret; } +static int kvm_riscv_put_regs_fp(CPUState *cs) +{ + int ret = 0; + int i; + CPURISCVState *env = &RISCV_CPU(cs)->env; + + if (riscv_has_ext(env, RVD)) { + uint64_t reg; + for (i = 0; i < 32; i++) { + reg = env->fpr[i]; + ret = kvm_set_one_reg(cs, RISCV_FP_D_REG(env, i), &reg); + if (ret) { + return ret; + } + } + return ret; + } + + if (riscv_has_ext(env, RVF)) { + uint32_t reg; + for (i = 0; i < 32; i++) { + reg = env->fpr[i]; + ret = kvm_set_one_reg(cs, RISCV_FP_F_REG(env, i), &reg); + if (ret) { + return ret; + } + } + return ret; + } + + return ret; +} + + const KVMCapabilityInfo kvm_arch_required_capabilities[] = { KVM_CAP_LAST_INFO }; @@ -176,7 +261,24 @@ int kvm_arch_get_registers(CPUState *cs) int kvm_arch_put_registers(CPUState *cs, int level) { - return 0; + int ret = 0; + + ret = kvm_riscv_put_regs_core(cs); + if (ret) { + return ret; + } + + ret = kvm_riscv_put_regs_csr(cs); + if (ret) { + return ret; + } + + ret = kvm_riscv_put_regs_fp(cs); + if (ret) { + return ret; + } + + return ret; } int kvm_arch_release_virq_post(int virq) -- 2.19.1