在 2023/12/28 下午4:40, Tianrui Zhao 写道:
> Implement kvm_arch_handle_exit for loongarch. In this
> function, the KVM_EXIT_LOONGARCH_IOCSR is handled,
> we read or write the iocsr address space by the addr,
> length and is_write argument in kvm_run.
>
> Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
> Signed-off-by: xianglai li <lixianglai@loongson.cn>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/loongarch/kvm.c | 24 +++++++++++++++++++++++-
> target/loongarch/trace-events | 1 +
> 2 files changed, 24 insertions(+), 1 deletion(-)
Reviewed-by: Song Gao <gaosong@loongson.cn>
Thanks.
Song Gao
> diff --git a/target/loongarch/kvm.c b/target/loongarch/kvm.c
> index 85e7aeb083..d2dab3fef4 100644
> --- a/target/loongarch/kvm.c
> +++ b/target/loongarch/kvm.c
> @@ -723,7 +723,29 @@ bool kvm_arch_cpu_check_are_resettable(void)
>
> int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
> {
> - return 0;
> + int ret = 0;
> + LoongArchCPU *cpu = LOONGARCH_CPU(cs);
> + CPULoongArchState *env = &cpu->env;
> + MemTxAttrs attrs = {};
> +
> + attrs.requester_id = env_cpu(env)->cpu_index;
> +
> + trace_kvm_arch_handle_exit(run->exit_reason);
> + switch (run->exit_reason) {
> + case KVM_EXIT_LOONGARCH_IOCSR:
> + address_space_rw(&env->address_space_iocsr,
> + run->iocsr_io.phys_addr,
> + attrs,
> + run->iocsr_io.data,
> + run->iocsr_io.len,
> + run->iocsr_io.is_write);
> + break;
> + default:
> + ret = -1;
> + warn_report("KVM: unknown exit reason %d", run->exit_reason);
> + break;
> + }
> + return ret;
> }
>
> void kvm_arch_accel_class_init(ObjectClass *oc)
> diff --git a/target/loongarch/trace-events b/target/loongarch/trace-events
> index 937c3c7c0c..021839880e 100644
> --- a/target/loongarch/trace-events
> +++ b/target/loongarch/trace-events
> @@ -11,3 +11,4 @@ kvm_failed_get_counter(const char *msg) "Failed to get counter from KVM: %s"
> kvm_failed_put_counter(const char *msg) "Failed to put counter into KVM: %s"
> kvm_failed_get_cpucfg(const char *msg) "Failed to get cpucfg from KVM: %s"
> kvm_failed_put_cpucfg(const char *msg) "Failed to put cpucfg into KVM: %s"
> +kvm_arch_handle_exit(int num) "kvm arch handle exit, the reason number: %d"