[PATCH RFC v4 14/15] target/riscv: Synchronize vcpu's frequency with KVM

If vcpu's frequency is specified by cpu option 'frequency', it will be set into KVM by KVM_SET_ONE_REG ioctl. Otherwise, vcpu's frequency will follow KVM by KVM_GET_ONE_REG ioctl. Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com&gt; Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com&gt; --- target/riscv/kvm.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index 1e16d24544..3499efd4eb 100644 --- a/target/riscv/kvm.c +++ b/target/riscv/kvm.c @@ -409,6 +409,8 @@ int kvm_arch_get_registers(CPUState *cs) int kvm_arch_put_registers(CPUState *cs, int level) { int ret = 0; + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; ret = kvm_riscv_put_regs_core(cs); if (ret) { @@ -425,6 +427,10 @@ int kvm_arch_put_registers(CPUState *cs, int level) return ret; } + if (env->frequency) { + ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency); + } + return ret; } @@ -481,6 +487,17 @@ int kvm_arch_init_vcpu(CPUState *cs) } env->misa = isa; + /* + * Synchronize vcpu's frequency with KVM. If vcpu's frequency is specified + * by cpu option 'frequency', this will be set to KVM. Otherwise, vcpu's + * frequency will follow KVM. + */ + if (env->user_frequency) { + ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency); + } else { + ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency); + } + return ret; } -- 2.19.1