This exit code means that this vCPU wants to inject an interrupt using
userspace-emulated controller.
The code is designed to be as much arch-agnostic as possible. Therefore,
it has IRQ number and level as parameters (encoded in struct kvm_irq_level).
Currently it will be used only by ARM architecture, whose implementation of
virtual timer works as if it was edge-sensitive (despite on real hardware
timer IRQ is level-sensitive). Therefore, level value is actually reserved
for implementing hypothetical level-sensitive IRQs. In this case this exit
code would indicate transition of the line to the specified level.
Signed-off-by: Pavel Fedin <p.fedin@xxxxxxxxxxx>
---
include/uapi/linux/kvm.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 4b60056..57f6fb7 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -183,6 +183,7 @@ struct kvm_s390_skeys {
#define KVM_EXIT_EPR 23
#define KVM_EXIT_SYSTEM_EVENT 24
#define KVM_EXIT_S390_STSI 25
+#define KVM_EXIT_IRQ 26
/* For KVM_EXIT_INTERNAL_ERROR */
/* Emulate instruction failed. */
@@ -329,6 +330,8 @@ struct kvm_run {
__u8 sel1;
__u16 sel2;
} s390_stsi;
+ /* KVM_EXIT_IRQ */
+ struct kvm_irq_level irq;
/* Fix the size of the union. */
char padding[256];
};
--
2.4.4
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