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[v2,2/3] RISC-V: KVM: Handle breakpoint exits for VCPU

Message ID 20240301013545.10403-3-duchao@eswincomputing.com (mailing list archive)
State New, archived
Headers show
Series RISC-V: KVM: Guest Debug Support - Software Breakpoint Part | expand

Commit Message

Chao Du March 1, 2024, 1:35 a.m. UTC 
Exit to userspace for breakpoint traps. Set the exit_reason as
KVM_EXIT_DEBUG before exit.

Signed-off-by: Chao Du <duchao@eswincomputing.com>
---
 arch/riscv/kvm/vcpu_exit.c | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Anup Patel March 1, 2024, 4:32 a.m. UTC | #1 
On Fri, Mar 1, 2024 at 7:08 AM Chao Du <duchao@eswincomputing.com> wrote:
>
> Exit to userspace for breakpoint traps. Set the exit_reason as
> KVM_EXIT_DEBUG before exit.
>
> Signed-off-by: Chao Du <duchao@eswincomputing.com>

LGTM.

Reviewed-by: Anup Patel <anup@brainfault.org>

Thanks,
Anup

> ---
>  arch/riscv/kvm/vcpu_exit.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c
> index 2415722c01b8..5761f95abb60 100644
> --- a/arch/riscv/kvm/vcpu_exit.c
> +++ b/arch/riscv/kvm/vcpu_exit.c
> @@ -204,6 +204,10 @@ int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
>                 if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV)
>                         ret = kvm_riscv_vcpu_sbi_ecall(vcpu, run);
>                 break;
> +       case EXC_BREAKPOINT:
> +               run->exit_reason = KVM_EXIT_DEBUG;
> +               ret = 0;
> +               break;
>         default:
>                 break;
>         }
> --
> 2.17.1
>
diff mbox series

Patch

diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c
index 2415722c01b8..5761f95abb60 100644
--- a/arch/riscv/kvm/vcpu_exit.c
+++ b/arch/riscv/kvm/vcpu_exit.c
@@ -204,6 +204,10 @@  int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
 		if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV)
 			ret = kvm_riscv_vcpu_sbi_ecall(vcpu, run);
 		break;
+	case EXC_BREAKPOINT:
+		run->exit_reason = KVM_EXIT_DEBUG;
+		ret = 0;
+		break;
 	default:
 		break;
 	}