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[Qemu-devel] [PULL 28/30] target/arm/kvm: gic: Prevent creating userspac

From: Peter Maydell
Subject: [Qemu-devel] [PULL 28/30] target/arm/kvm: gic: Prevent creating userspace GICv3 with KVM
Date: Fri, 9 Feb 2018 11:03:12 +0000

From: Christoffer Dall <address@hidden>

KVM doesn't support emulating a GICv3 in userspace, only GICv2.  We
currently attempt this anyway, and as a result a KVM guest doesn't
receive interrupts and the user is left wondering why.  Report an error
to the user if this particular combination is requested.

Signed-off-by: Christoffer Dall <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
 target/arm/kvm_arm.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h
index ff53e9fafb..cfb7e5af72 100644
--- a/target/arm/kvm_arm.h
+++ b/target/arm/kvm_arm.h
@@ -234,6 +234,10 @@ static inline const char *gicv3_class_name(void)
     } else {
+        if (kvm_enabled()) {
+            error_report("Userspace GICv3 is not supported with KVM");
+            exit(1);
+        }
         return "arm-gicv3";

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