We check the in-kernel irqchip support when using KVM acceleration.

Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: Jim Shu <jim.shu@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 target/riscv/kvm.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 9d8a8982f9..005e054604 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -914,7 +914,15 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
 
 int kvm_arch_irqchip_create(KVMState *s)
 {
-    return 0;
+    if (kvm_kernel_irqchip_split()) {
+        error_report("-machine kernel_irqchip=split is not supported on RISC-V.");
+        exit(1);
+    }
+
+    /*
+     * We can create the VAIA using the newer device control API.
+     */
+    return kvm_check_extension(s, KVM_CAP_DEVICE_CTRL);
 }
 
 int kvm_arch_process_async_events(CPUState *cs)
-- 
2.17.1

On Thu, Jul 13, 2023 at 08:43:54AM +0000, Yong-Xuan Wang wrote:
> We check the in-kernel irqchip support when using KVM acceleration.
> 
> Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
> Reviewed-by: Jim Shu <jim.shu@sifive.com>
> Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
> ---
>  target/riscv/kvm.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
> index 9d8a8982f9..005e054604 100644
> --- a/target/riscv/kvm.c
> +++ b/target/riscv/kvm.c
> @@ -914,7 +914,15 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
>  
>  int kvm_arch_irqchip_create(KVMState *s)
>  {
> -    return 0;
> +    if (kvm_kernel_irqchip_split()) {
> +        error_report("-machine kernel_irqchip=split is not supported on RISC-V.");
> +        exit(1);
> +    }
> +
> +    /*
> +     * We can create the VAIA using the newer device control API.
> +     */
> +    return kvm_check_extension(s, KVM_CAP_DEVICE_CTRL);
>  }
>  
>  int kvm_arch_process_async_events(CPUState *cs)
> -- 
> 2.17.1
>

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