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target/arm/kvm: gic: Prevent creating userspace GICv3 with KVM 

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 <christoffer.dall@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180201205307.30343-1-christoffer.dall@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Christoffer Dall 2018-02-01 21:53:07 +01:00 committed by Peter Maydell
parent 1db5e96c54
commit bd55947884
1 changed files with 4 additions and 0 deletions
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target/arm/kvm_arm.h
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@ -234,6 +234,10 @@ static inline const char *gicv3_class_name(void)
exit(1);
#endif
} else {
if (kvm_enabled()) {
error_report("Userspace GICv3 is not supported with KVM");
exit(1);
}
return "arm-gicv3";
}
}