[PATCH v4 3/6] target/riscv: check the in-kernel irqchip support

[Yong-Xuan Wang]

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 | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 0f932a5b96..eb469e8ca5 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -433,7 +433,18 @@ 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);
+    }
+
+    /*
+     * If we can create the VAIA using the newer device control API, we
+     * let the device do this when it initializes itself, otherwise we
+     * fall back to the old API
+     */
+    return kvm_check_extension(s, KVM_CAP_DEVICE_CTRL);
 }
 
 int kvm_arch_process_async_events(CPUState *cs)
-- 
2.17.1