kvm: add API to set ioeventfd
Comment on kvm usage: rather than require users to do if (kvm_enabled())
and/or ifdefs, this patch adds an API that, internally, is defined to
stub function on non-kvm build, and checks kvm_enabled for non-kvm
run.
While rest of qemu code still uses if (kvm_enabled()), I think this
approach is cleaner, and we should convert rest of code to it
long term.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/kvm.h b/kvm.h
index 4f77188..1e5be27 100644
--- a/kvm.h
+++ b/kvm.h
@@ -14,12 +14,17 @@
#ifndef QEMU_KVM_H
#define QEMU_KVM_H
+#include <stdbool.h>
+#include <errno.h>
#include "config-host.h"
#include "qemu-queue.h"
-extern int kvm_allowed;
+#ifdef CONFIG_KVM
+#include <linux/kvm.h>
+#endif
#ifdef CONFIG_KVM
+extern int kvm_allowed;
#define kvm_enabled() (kvm_allowed)
#else
#define kvm_enabled() (0)
@@ -161,5 +166,16 @@
kvm_cpu_synchronize_post_init(env);
}
}
+
+#if defined(KVM_IOEVENTFD) && defined(CONFIG_KVM)
+int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
+#else
+static inline
+int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign)
+{
+ return -ENOSYS;
+}
+#endif
+
#endif
#endif
