[PATCH RFC v4 03/15] target/riscv: Implement function kvm_arch_init_vcpu

[Alistair Francis]

On Thu, Dec 3, 2020 at 4:55 AM Yifei Jiang <jiangyifei at huawei.com> wrote:
>
> Get isa info from kvm while kvm init.
>
> Signed-off-by: Yifei Jiang <jiangyifei at huawei.com>
> Signed-off-by: Yipeng Yin <yinyipeng1 at huawei.com>
> ---
>  target/riscv/kvm.c | 27 ++++++++++++++++++++++++++-
>  1 file changed, 26 insertions(+), 1 deletion(-)
>
> diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
> index 8c386d9acf..86660ba81b 100644
> --- a/target/riscv/kvm.c
> +++ b/target/riscv/kvm.c
> @@ -38,6 +38,18 @@
>  #include "qemu/log.h"
>  #include "hw/loader.h"
>
> +static __u64 kvm_riscv_reg_id(__u64 type, __u64 idx)
> +{
> +    __u64 id = KVM_REG_RISCV | type | idx;
> +
> +#if defined(TARGET_RISCV32)
> +    id |= KVM_REG_SIZE_U32;
> +#elif defined(TARGET_RISCV64)
> +    id |= KVM_REG_SIZE_U64;
> +#endif

There is a series on list (I'll send a v2 out later today) that starts
to remove these #ifdef for the RISC-V XLEN. Next time you rebase it
would be great if you can use that and hopefully remove this.

Alistair

> +    return id;
> +}
> +
>  const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
>      KVM_CAP_LAST_INFO
>  };
> @@ -79,7 +91,20 @@ void kvm_arch_init_irq_routing(KVMState *s)
>
>  int kvm_arch_init_vcpu(CPUState *cs)
>  {
> -    return 0;
> +    int ret = 0;
> +    target_ulong isa;
> +    RISCVCPU *cpu = RISCV_CPU(cs);
> +    CPURISCVState *env = &cpu->env;
> +    __u64 id;
> +
> +    id = kvm_riscv_reg_id(KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa));
> +    ret = kvm_get_one_reg(cs, id, &isa);
> +    if (ret) {
> +        return ret;
> +    }
> +    env->misa = isa;
> +
> +    return ret;
>  }
>
>  int kvm_arch_msi_data_to_gsi(uint32_t data)
> --
> 2.19.1
>
>