[PATCH v9 38/55] i386/tdx: Set and check kernel_irqchip mode for TDX

[Xiaoyao Li]

KVM mandates kernel_irqchip to be split mode.

Set it to split mode automatically when users don't provide an explicit
value, otherwise check it to be the split mode.

Suggested-by: Daniel P. Berrangé <berra...@redhat.com>
Signed-off-by: Xiaoyao Li <xiaoyao...@intel.com>
Reviewed-by: Daniel P. Berrangé <berra...@redhat.com>
Reviewed-by: Zhao Liu <zhao1....@intel.com>
---
 target/i386/kvm/tdx.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 4cb767668a3a..0e1fd3e3ffa1 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -16,6 +16,7 @@
 #include "qapi/error.h"
 #include "qom/object_interfaces.h"
 #include "crypto/hash.h"
+#include "system/kvm_int.h"
 #include "system/runstate.h"
 #include "system/system.h"
 #include "exec/ramblock.h"
@@ -395,6 +396,13 @@ static int tdx_kvm_init(ConfidentialGuestSupport *cgs, 
Error **errp)
         return -EINVAL;
     }
 
+    if (kvm_state->kernel_irqchip_split == ON_OFF_AUTO_AUTO) {
+        kvm_state->kernel_irqchip_split = ON_OFF_AUTO_ON;
+    } else if (kvm_state->kernel_irqchip_split != ON_OFF_AUTO_ON) {
+        error_setg(errp, "TDX VM requires kernel_irqchip to be split");
+        return -EINVAL;
+    }
+
     if (!tdx_caps) {
         r = get_tdx_capabilities(errp);
         if (r) {
-- 
2.43.0