diff mbox series

[v1,3/4] target/riscv/kvm: handle the exit with debug reason

Message ID 20240527021916.12953-4-duchao@eswincomputing.com (mailing list archive)
State New
Headers show
Series target/riscv/kvm: QEMU support for KVM Guest Debug on RISC-V | expand

Commit Message

Chao Du May 27, 2024, 2:19 a.m. UTC 
If the breakpoint belongs to the userspace then set the ret value.

Signed-off-by: Chao Du <duchao@eswincomputing.com>
---
 target/riscv/kvm/kvm-cpu.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

Comments

Daniel Henrique Barboza May 27, 2024, noon UTC | #1 
On 5/26/24 23:19, Chao Du wrote:
> If the breakpoint belongs to the userspace then set the ret value.
> 
> Signed-off-by: Chao Du <duchao@eswincomputing.com>
> ---

Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

>   target/riscv/kvm/kvm-cpu.c | 20 ++++++++++++++++++++
>   1 file changed, 20 insertions(+)
> 
> diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
> index 0bc3348b91..0c45e520b2 100644
> --- a/target/riscv/kvm/kvm-cpu.c
> +++ b/target/riscv/kvm/kvm-cpu.c
> @@ -1555,6 +1555,21 @@ static int kvm_riscv_handle_csr(CPUState *cs, struct kvm_run *run)
>       return ret;
>   }
>   
> +static bool kvm_riscv_handle_debug(CPUState *cs)
> +{
> +    RISCVCPU *cpu = RISCV_CPU(cs);
> +    CPURISCVState *env = &cpu->env;
> +
> +    /* Ensure PC is synchronised */
> +    kvm_cpu_synchronize_state(cs);
> +
> +    if (kvm_find_sw_breakpoint(cs, env->pc)) {
> +        return true;
> +    }
> +
> +    return false;
> +}
> +
>   int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
>   {
>       int ret = 0;
> @@ -1565,6 +1580,11 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
>       case KVM_EXIT_RISCV_CSR:
>           ret = kvm_riscv_handle_csr(cs, run);
>           break;
> +    case KVM_EXIT_DEBUG:
> +        if (kvm_riscv_handle_debug(cs)) {
> +            ret = EXCP_DEBUG;
> +        }
> +        break;
>       default:
>           qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
>                         __func__, run->exit_reason);
Andrew Jones May 27, 2024, 3:48 p.m. UTC | #2 
On Mon, May 27, 2024 at 02:19:15AM GMT, Chao Du wrote:
> If the breakpoint belongs to the userspace then set the ret value.
> 
> Signed-off-by: Chao Du <duchao@eswincomputing.com>
> ---
>  target/riscv/kvm/kvm-cpu.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
> index 0bc3348b91..0c45e520b2 100644
> --- a/target/riscv/kvm/kvm-cpu.c
> +++ b/target/riscv/kvm/kvm-cpu.c
> @@ -1555,6 +1555,21 @@ static int kvm_riscv_handle_csr(CPUState *cs, struct kvm_run *run)
>      return ret;
>  }
>  
> +static bool kvm_riscv_handle_debug(CPUState *cs)
> +{
> +    RISCVCPU *cpu = RISCV_CPU(cs);
> +    CPURISCVState *env = &cpu->env;
> +
> +    /* Ensure PC is synchronised */
> +    kvm_cpu_synchronize_state(cs);
> +
> +    if (kvm_find_sw_breakpoint(cs, env->pc)) {
> +        return true;
> +    }
> +
> +    return false;
> +}
> +
>  int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
>  {
>      int ret = 0;
> @@ -1565,6 +1580,11 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
>      case KVM_EXIT_RISCV_CSR:
>          ret = kvm_riscv_handle_csr(cs, run);
>          break;
> +    case KVM_EXIT_DEBUG:
> +        if (kvm_riscv_handle_debug(cs)) {
> +            ret = EXCP_DEBUG;
> +        }
> +        break;
>      default:
>          qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
>                        __func__, run->exit_reason);
> -- 
> 2.17.1
> 
>

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
diff mbox series

Patch

diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index 0bc3348b91..0c45e520b2 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -1555,6 +1555,21 @@  static int kvm_riscv_handle_csr(CPUState *cs, struct kvm_run *run)
     return ret;
 }
 
+static bool kvm_riscv_handle_debug(CPUState *cs)
+{
+    RISCVCPU *cpu = RISCV_CPU(cs);
+    CPURISCVState *env = &cpu->env;
+
+    /* Ensure PC is synchronised */
+    kvm_cpu_synchronize_state(cs);
+
+    if (kvm_find_sw_breakpoint(cs, env->pc)) {
+        return true;
+    }
+
+    return false;
+}
+
 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
 {
     int ret = 0;
@@ -1565,6 +1580,11 @@  int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
     case KVM_EXIT_RISCV_CSR:
         ret = kvm_riscv_handle_csr(cs, run);
         break;
+    case KVM_EXIT_DEBUG:
+        if (kvm_riscv_handle_debug(cs)) {
+            ret = EXCP_DEBUG;
+        }
+        break;
     default:
         qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
                       __func__, run->exit_reason);