KVM: x86: Add comment on vcpu_enter_guest()'s return value
Giving proper names to the 0 and 1 was once suggested. But since 0 is
returned to the userspace, giving it another name can introduce extra
confusion. This patch just explains the meanings instead.
Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4fb1ee6..1dc0359 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5865,6 +5865,11 @@
kvm_apic_update_tmr(vcpu, tmr);
}
+/*
+ * Returns 1 to let __vcpu_run() continue the guest execution loop without
+ * exiting to the userspace. Otherwise, the value will be returned to the
+ * userspace.
+ */
static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
{
int r;
